U.S. PATENT AND TRADEMARK OFFICE
Information Products Division |
U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
Patents classified in a subclass may be accessed by either clicking on
the subclass number
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( please note that patents for some subclasses may not be available )
For classification search strategies, please refer to the
Classification Index
Explanation of Data web page.
(definitions have been obtained from the
Patents ASSIST CD-ROM which
is produced by the U.S. Patent and Trademark Office
Electronic Products Branch)
Class 432
HEATING
Class Definition:
This is the residual class for apparatus and related methods
for the generation of heat and its application to materials;
and for subcombinations and adjuncts specialized to such
heating.
Note. Patents issued prior to 1945 have not in all instances
been classified by their claimed disclosure so the placement
of these older patents does not necessarily indicate lines of
classification.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
A. HEATING FURNACES (I.E., CHAMBER FOR RECEIVING MATERIAL TO
BE HEATED AND SUPPLIED WITH HEAT INDEPENDENTLY OF THE CHARGE)
AND HEATING FURNACE COMBINATION:
1. Class 266, Metallurgical Apparatus takes the following
combinations of a heating furnace with additional structure
for a metallurgical purpose:
a. A heating furnace with additional structure for cooling or
quenching a solid metal object after heating is in Class 266
if the disclosure is limited to the metallurgical treatment
of metals. If the disclosure is generic to metals and
nonmetals or if the material has not been specified,
Classification is in Class 432. It is noted that glass and
ceramic article are commonly "annealed". Accordingly, a
disclosure of "annealing" without a specification of material
is in Class 432.
b. Those heating furnaces which are limited by disclosure to
heating solid metal articles and which have structure for
supplying or producing a special atmosphere either protective
or treating, are in Class 266. Furnaces not elsewhere
provided for having gas supplying or producing means will be
found in this (432) Class.
c. A heating furnace in which material is melted having
additional structure for the collection of flow, separation,
dispensing or mixing of melted metal is in Class 266 when the
sole disclosure relates to the handling of metal.
d. A heating furnace in combination with a fume arrester in
which the sole disclosure relates to the arresting of
metallurgical fume, i.e. of condensate of metallic vapor
generated from a charge of metal ore or intermediate metal
product, is in Class 266. A residual heating furnace with
means separating dust or slag from the furnace discharge is
classifiable in Class 432, subclasses 67+.
2. A residual heating furnace not specialized to
metallurgical use as indicated above is in Class 432. It is
noted that a "reverbatory" furnace or a furnace in which a
steel making crucible is heated may be a Class 432 heating
subcombination of general utility even though the disclosed
charge includes metal or metal ore with reactive ingredients
combined therewith or separately fed into the heating
chamber.
B. OXYGEN REACTION FURNACES:
A furnace heated by reacting a charge of solid material with
gaseous oxygen to produce heat and a chemical transformation
of charge material and not having a separate heat generator
is in Class 266 when the sole disclosed specific use of the
apparatus is to produce metal or an intermediate metal
product. It is considered that a "blast furnace," a "cupola
furnace," and a "converter" are this type of Class 266
apparatus unless there is a positive indication that the
apparatus may be used to treat a specific nonmetal. Also, in
the absence of a disclosure that the apparatus of utility in
treating nonmetal producing materials, the term "sintering"
applied to a furnace treating bulk particulate material with
gas is considered to indicate metallurgical apparatus for
Class 266.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
4, Baths, Closets, Sinks, and Spittoons, subclass 360 for a
dry sanitary closet having a means for drying or burning the
discharge.
5, Beds, subclass 284 for an accessory device for heating or
cooling a bed.
26, Textile: Cloth Finishing, subclass 81, 92, and 106 for
apparatus for expanding (e.g., stretching, spreading) running
length webs of cloth which further include means for heating
or drying the cloth.
34, Drying and Gas or Vapor Contact With Solids, 280 for a
process limited to drying even though involving the burning
of fuel, and for a residual process of contacting a solid
with a gas or vapor; and appropriate subclass for (1) a
heating apparatus specialized to drying or (2) an apparatus
specialized to contacting solid with a gas. A merely nominal
heating means may be included in the structure of the
apparatus of (1) and (2).
37, Excavating, subclass 226 for apparatus for excavating,
compacting and melting snow.
43, Fishing, Trapping, and Vermin Destroying, subclass 144
for a burner specialized to destroying vermin.
47, Plant Husbandry, subclass 1.44 for a process or
apparatus specialized for use in plant husbandry for flame
cultivation.
48, Gas: Heating and Illuminating, subclass 61 for
apparatus in which heating or illuminating gas is produced by
heating carbonaceous material in a chamber.
53, Package Making, subclass 127 for a package making
apparatus having means to heat or cool the contents of the
package; and subclasses 373.7+ for a means to complete a
package by heating or cooling a seam to seal the package.
68, Textiles: Fluid Treating Apparatus, subclass 15 for a
clothes washing machine combined with means to heat the tub
or for applying heat to liquid within the tub.
95, Gas Separation: Processes, for processes of gas
separation perfected by the application of heat.
96, Gas Separation: Apparatus, for apparatus for gas
separation perfected with heating means.
105, Railway Rolling Stock, subclass 451 for apparatus for
thawing a frozen load in railway rolling stock.
106, Compositions: Coating or Plastic, 739 for a process of
(1) making cement, (2) making a cement intermediate product
or (3) for treating calcareous or argillaceous material if
the treatment is disclosed as being for the purpose of making
"cement" or lime".
110, Furnaces, appropriate subclasses for a solid fuel
combustion furnace or subcombination thereof; and 173 for a
door usable on either a heating furnace or a solid fuel
combustion furnace.
118, Coating Apparatus, subclass 47 for coating apparatus
including means for carbonizing, flame contact, or burning
off of coating ingredient; and subclasses 641+ for coating
apparatus having means for the radiant heating of the work or
coating.
119, Animal Husbandry, 302 for a brooder and subclasses 311+
for an incubator.
126, Stoves and Furnaces, for the apparatus for the
application of heat, and for the stove and furnace elements
specifically provided for in the various subclasses.
134, Cleaning and Liquid Contact With Solids, 105 for a
cleaning and liquid contact with solids device having a
nominal heating, cooling or heat exchange means.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
subclass 497 for a surface bonding device with gas, vapor or
flame contact means for the work; and subclasses 583.1+ for a
heated press for a surface bonding apparatus.
159, Concentrating Evaporators, appropriate subclass for a
residual process or apparatus for concentrating a liquid by
heat.
164, Metal Founding, appropriate subclass for the molding of
free flowing liquid metal.
165, Heat Exchange, appropriate subclass for a residual
method or apparatus for the transfer of heat from one
material to another.
(1) Note. A heat generator is considered to make the
arrangement special to heating except where the structure is
a combined heating and cooling device.
196, Mineral Oils: Apparatus, 104 for apparatus for
vaporizing mineral oils.
237, Heating Systems, appropriate subclass for an apparatus
or process of heating a room, chamber or other enclosing
structure by a system delivering fluid heated by a heat
generator to the room or structure or to a heat exchanger in
the room or structure.
266, Metallurgical Apparatus, appropriate subclass, for
apparatus concerned with the extraction of metals from their
ores, with the refining of metal, and with the establishing a
physical or mechanical property of a solid metal object by a
heat treatment related to the composition of the object. The
relationship of the two classes is as follows:
297, Chairs and Seats, subclass 180.1 for a heated chair or
seat.
366, Agitating, subclass 144 for an agitator combined with
means to heat the material during agitation, for purposes
other than drying, involving no structural detail of the
heating or heat transfer means and no new relationship of the
heating structure to the agitating structure.
373, Industrial Electrical Heating Furnaces, appropriate
subclass for a furnace specialized to the use of electricity
as the heat source and particularly adapted to metallurgical
and related work. Such furnace is generally characterized by
electrical heating means within the chamber containing the
material to be heated, the heating means being either an arc,
a resistance, the material itself, or a combination of such
means, and is further characterized by adaptation for
operation on a granular material, such as crushed ore, or for
handling molten material fusing at a very high temperature,
the material in both cases being received immediately within
the body of the furnace.
376, Induced Nuclear Reactions: Processes, Systems, and
Elements, appropriate subclass for a nuclear reactor type of
heat generator delivering heat energy to a material or to a
power generator.
392, Electric Resistance Heating Devices, 307 for a specific
electrical heating device combined with nonelectric heating
means; and appropriate subclass for a residual device for the
generator of heat by electricity and the utilization of the
heat wherein there is involved an electrical characteristic
or electrical structure that is more than merely nominal.
422, Chemical Apparatus and Process Disinfecting,
Deodorizing, Preserving, or Sterilizing, appropriate
subclasses for heating sterilizers; combustion or reaction
device for purifying gas, or with means for recovering,
mixing, separating, or otherwise handling as a product formed
in the device; autoclaves for carrying out a reaction at high
temperature; a cooler or digest or not otherwise provided
for; and residual chemical apparatus.
452, Butchering, subclass 73 for for singeing devices and
subclasses 74+ for scalding devices.
607, Surgery: Light, Thermal, and Electrical Application,
subclass 1 for a device for treating an abnormal condition
of a living body with light, heat, or electricity.
SUBCLASSES
Subclass:
1
This subclass is indented under the class definition.
Processes of heating or heating apparatus operation under the
....
SEE OR SEARCH CLASS:
29, Metal Working, 592 for a process of mechanical
manufacture involving metal working that may include heating
of the work.
65, Glass Manufacturing, 17.1 for a process including the
working of a glass type material after it has been softened
or melted by heating.
106, Compositions: Coating or Plastic, 100 for a process
specialized to Portland type cement material.
134, Cleaning and Liquid Contact With Solids, 19 for a
process of cleaning including (1) contacting the work by hot
products of combustion or (2) heating the work in any way
other than or in addition to contacting the work with heated
cleaning or liquid contact agents.
148, Metal Treatment, appropriate subclasses for processes of
heat treating metal to modify or maintain the internal
physical structure (i.e., microstructure) or chemical
properties of metal. If metal casting, fusion bonding,
machining, or working is involved, there is a requirement of
significant heat treatment as described in the Class
Definition for Class 148.
159, Concentrating Evaporators, 47.1 for a process of
concentrating a liquid by evaporating one of the
constituents.
165, Heat Exchange, 58 and 201+ for a process involving both
heating and cooling and in which the cooling accomplishes
more than the return of the temperature of heated work to
room temperature.
166, Wells, 302 for a process of heating or cooling a well
formation.
175, Boring and Penetrating the Earth, 11 for a process of
boring the earth by directly applying heat to the formation
material.
201, Distillation: Processes, Thermolytic, appropriate
subclass for a process comprising heating a carbonaceous
material to vaporize a volatile material and to break down
the substance into other chemical substances.
203, Distillation: Processes, Separatory, appropriate
subclass for a process involving the heating of a liquid
mixture to drive off one constituent and the condensing of
the expelled constituent.
237, Heating Systems, subclass 12, for an automatic control
process in a heating system, and subclass 81 for a process
for heating a house, room or other enclosure by a heat
distributing system.
373, Industrial Electrical Heating Furnaces, subclass 85,
102+, 116, 135+, 146, and 149+ for processes of operating or
manipulating an electric furnace and for merely heating by
means of an electric furnace.
427, Coating Processes, 223 for coating processes including
flame contact.
431, Combustion, 2 for a process of combustion not involving
the application of the generated heat to external material.
Subclass:
2
This subclass is indented under subclass 1. Process
including a procedure for flushing out, dislodging, or
preventing collection of undesirable material in heating
apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
50 for apparatus under the class definition including a
protector, cleaner or support for a condition sensor:
subclass 74 for heating apparatus with a drip, spill or
leakage collector: and subclass 75 for heating apparatus
having cleaning means.
SEE OR SEARCH CLASS:
110, Furnaces, 341 for method of operating solid fuel
furnaces or refuse incinerators.
134, Cleaning and Liquid Contact With Solids, subclasses 1-42
for a residual process of cleaning, or contacting a solid
with a liquid.
165, Heat Exchange, subclass 5 for the cleaning of a
regenerator.
201, Distillation: Processes, Thermolytic, subclass 2 for a
process including a step of cleaning an apparatus in which a
solid carbonaceous material is heated.
431, Combustion, subclass 2 for a process of decarbonizing,
cleaning or purging a combustion device.
Subclass:
3
This subclass is indented under subclass 1. Process in which
a step of repairing, converting or assembling is an integral
part of a heating procedure or in which repairing or
assembling of the apparatus is effected in part by the heat
incident to the operation of the apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
76 for heating apparatus having structural elements provided
for use in repair or assembly of the apparatus.
SEE OR SEARCH CLASS:
52, Static Structures (e.g., Buildings), 741.1 and 745.06+
for a process of forming or assembling a structure in situ.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, subclass 30 for a process of repairing or forming
a furnace lining and see the extensive collected search class
notes of this Class 264 subclass.
Subclass:
4
This subclass is indented under subclass 1. Process
including (1) a step or procedure for preventing damage to a
heating device or (2) a procedure effective to bring a
heating device up to or to lower its temperature from
operating temperature.
SEE OR SEARCH THIS CLASS, SUBCLASS:
35 for a heating apparatus having a frangible or fusible
safety relief or shutdown means.
38 for a condition responsive control of apparatus
protecting fluid or means:
116 for a rotary drum furnace having protective cooling
means.
233 for a heating apparatus element having protective
cooling structure.
248 for a melt holding section of a furnace having a
protected section.
251 for furnace structure having expansion, absorbing or
relieving means.
SEE OR SEARCH CLASS:
164, Metal Founding, subclass 121 for a process in which
founding apparatus is readied for casting.
Subclass:
5
This subclass is indented under subclass 1. Process
including a manipulation of, or an operation on the work
prior to the application of heat, that conditions the work
for receiving heat or that places it in position to be
heated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
87 for heating apparatus having means supplying work to its
work feeder.
SEE OR SEARCH CLASS:
201, Distillation: Processes, Thermolytic, subclass 6 for
the distilling of solid carbonaceous material involving a
step of shaping the material prior to heating; subclass 8 for
a process of distilling solid carbonaceous material involving
grinding the material prior to charging it into the
carbonizing zone; and subclass 40 for distillation of solid
carbonaceous material with a step of arranging the material
to be heated.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, 57 for a process of vitrifying or sintering a
preform to make an inorganic article (e.g., ceramic etc.)
involving the particular positioning, arranging or conveying
of articles during heating.
Subclass:
6
This subclass is indented under subclass 5. Processes
including positioning a plurality of objects in an orderly
arrangement for exposure to heat.
SEE OR SEARCH THIS CLASS, SUBCLASS:
253 for a structure in which material is placed or arranged
for holding work within a furnace during heating.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 518
for a drying process involving piling or arranging the
material treated.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, 605 for a process of stacking or arranging plural
preformed articles for vitrifying or sintering by heating.
Subclass:
7
This subclass is indented under subclass 5. Process in which
the arranging of the work material includes spreading out
particulate material to form a porous sheet of relatively
small transverse dimension.
Subclass:
8
This subclass is indented under subclass 1. Process
including the step of passing a continuous strip, strand, web
or sheet longitudinally through a heating zone.
SEE OR SEARCH THIS CLASS, SUBCLASS:
59 for heating structure with means winding, coiling or
flexing a longitudinally moving sheet, web or strand.
122 for heating structure including means for manipulating,
orienting, segregating or topically heating an individual
article; and
231 for heating apparatus including a heat generator and
means engaging and retaining an article in a desired
relationship to the heat generator.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 444 for a
process of drying a sheet, web or strand by contact with gas
or vapor and subclasses 519+ for a process of drying a sheet,
web or strand by radiant or conducted heat.
148, Metal Treatment, appropriate subclasses for processes of
heat treating metal to modify or maintain the internal
physical structure (i.e., microstructure) or chemical
properties of metal. If metal casting, fusion bonding,
machining, or working is involved, there is a requirement of
significant heat treatment as described in the Class 148
Class Definition. Class 148 subclass 568, 576, and 595
through 600 relate to treatment of wire and subclasses 601
through 603, 657, and 661 relate to treatment of strips.
Subclass:
9
This subclass is indented under subclass 1. Process
peculiarly adapted to individually treat a work entity
identifiable as an article, batch, or body.
SEE OR SEARCH CLASS:
65, Glass Manufacturing, subclass 120 for a process of
treating a glass preform by flame.
219, Electric Heating, appropriate subclass for a process of
heating an article electrically.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, 603 for a process of heating a preform to a
vitrifying or sintering temperature to produce an inorganic
article, e.g., ceramic etc.
Subclass:
10
This subclass is indented under subclass 9. Process in which
heating, cooling or other treatment is concentrated on a
section of the entity; or a section of the entity is shielded
from heating, cooling or other treatment.
SEE OR SEARCH THIS CLASS, SUBCLASS:
62 for a heater having a mask, baffle, or conductor
concentrating heat on, or protecting a section of an
article.
123 for a work handler outside a heating chamber supporting
work partially within the chamber.
184 for a heating chamber having an opening through which an
article is partially inserted into the chamber to be heated.
225 for a heat applicator mounted on or assembled about a
work article.
SEE OR SEARCH CLASS:
53, Package Making, subclass 477 for a process involving
closing a package and heat sealing it at a localized area.
83, Cutting, subclass 16 for a cutting process having an
ancillary heating of a localized area.
148, Metal Treatment, particularly 194 for processes of
chemical heat-removing (e.g., flame-cutting, etc.) or burning
of metal, subclasses 210+ for processes of carburizing or
nitriding of a selected area or zone of metal, or subclass
627 and subclasses 639-644 for localized or zone heating of
iron base alloys.
Subclass:
11
This subclass is indented under subclass 9. Process in which
the work entity is moved through a heating zone or past
heating means while the heat is acting upon the article.
Subclass:
12
This subclass is indented under subclass 9. Process in which
the work unit has heat applied to it (1) at a varying or
stepped rate as it approaches a desired temperature, or (2)
at a higher rate during a period at which it is being raised
to a desired temperature than the rate at which it is
supplied while the temperature is being maintained.
Subclass:
13
This subclass is indented under subclass 1. Process in which
the work undergoes a change of phase, is comminuted, is
sintered, or is classified in the course of treatment.
SEE OR SEARCH CLASS:
23, Chemistry: Physical Processes, subclass 308 for a
process of melting out a fusible solid from a less fusible
material.
34, Drying and Gas or Vapor Contact With Solids, 519 for a
process of drying by heating.
75, Specialized Metallurgical Processes, Compositions for Use
Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate Mixtures, 343 for processes of producing
or purifying free metal powder and subclasses 414+ for
producing metal or treating molten metal at 300 degrees or
greater.
148, Metal Treatment, 194 for processes of chemical-heat
removing (e.g., flame cutting, etc.) or burning of metal.
Class 148 for processes of heat treating metal to modify or
maintain the internal physical structure (i.e.,
microstructure) or chemical properties of metal. If metal
casting, fusion bonding, machining, or working is involved,
there is a requirement of significant heat treatment as
described in the Class 148 Class Definition.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
81 for the melting or gasification of solid material in situ
in an air tight cavity; subclasses 89.11+ for surface bonding
with verification or firing of ceramic material.
159, Concentrating Evaporators, 47.1 for a process of
concentrating a material in a liquid by evaporating a
constituent of the liquid.
164, Metal Founding, 1 for process of casting metal.
203, Distillation: Processes, Separatory, appropriate
subclass for a process involving the vaporization of a liquid
from a mixture and the condensation of the vaporized liquid.
239, Fluid Sprinkling, Spraying, and Diffusing, 79 for a
device melting solid spray material at a nozzle and spraying
it from the nozzle.
241, Solid Material Comminution or Disintegration, subclass
23 for a process of comminuting solid material having
ancillary heating.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, appropriate subclass for a process of shaping or
treating a plastic, nonmetallic article generally involving
the application of heat.
373, Industrial Electric Heating Furnaces, subclass 85, 102+,
116, 135+, 146, and 149+ for a process of manipulating an
electrical melting furnace.
419, Powder Metallurgy Processes, appropriate subclasses,
particularly 1 for processes for making articles from metal
containing particulate material involving the use of pressure
and heat.
Subclass:
14
This subclass is indented under subclass 1. Process
including a step in which a temperature modifying gas
traverses a mass or stream of particulate work.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 443 for a
process of drying involving gas or vapor contact with the
material being dried.
Subclass:
15
This subclass is indented under subclass 14. Process in
which the operation is such that the work particles are so
suspended in the gaseous current that the mixture of the gas
and particles act like a liquid in forming a surface level,
in flowing, and in supporting by buoyancy.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 359
for a drying process or a residual process of contacting
Solids with a gas involving fluidization of the solid
material.
201, Distillation: Processes, Thermolytic, subclass 31 for
a process of heating carbonaceous material in a fluidized bed
for distillation.
502, Catalyst, Solid Sorbent, or Support Therefor: Product
or Process of Making, for a composition comprising a catalyst
or sorbent, per se, and see especially 20 for processes of
regenerating such a composition which may use a fluidized
suspension of particles in a gas.
Subclass:
16
This subclass is indented under subclass 14. Process
involving the separation of work particles from withdrawn
treating gas.
Subclass:
17
This subclass is indented under subclass 14. Process in
which the procedure includes continuously adjusting the flow
of work particles or treating gas to maintain or establish
steady flow conditions.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 446 for a
process of drying by gas or vapor contact including
temperature control or varying.
Subclass:
18
This subclass is indented under subclass 1. Process in which
work is (1) moved along a path traversing zones of diverse
characteristics or a zone having an increasing or decreasing
temperature along its length; or (2) has applied to it
successive treatments different in kind or (3) has its
temperature changed by successive or progressive heat
treatments.
Subclass:
19
This subclass is indented under subclass 1. Process
including a step of forming, maintaining or circulating
atmosphere in a heating chamber or about work material.
SEE OR SEARCH CLASS:
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, for sintering or vitrifying of shaped bodies,
particularly, 646 or 674+ with controlling of gas
composition of the heating chamber, subclasses 653+ with
plural heating steps, subclasses 664+ or 667+ with specified
gas pressure in the heating chamber, or subclasses 677+ with
controlling or directing heated gas or exhaust within a
heating chamber.
431, Combustion, subclass 8 for a combustion process
involving flame shaping or distributing components in a
combustion zone.
Subclass:
20
This subclass is indented under subclass 19. Process in
which the heat radiation characteristics of the work
atmosphere are controlled by providing an additive or
adjusting combustion to produce a flame of high luminosity.
SEE OR SEARCH CLASS:
431, Combustion, for a combustion process including the
feeding of a flame modifying additive.
Subclass:
21
This subclass is indented under subclass 19. Process in
which the atmosphere is controlled by recycling withdrawn
material back to the work zone.
SEE OR SEARCH CLASS:
431, Combustion, subclass 9 for a combustion process
involving whirling, recycling material, or reversing flow in
an enclosed flame zone.
Subclass:
22
This subclass is indented under subclass 19. Process in
which a heating device is operated to establish a body of gas
in the form of a sheet within or forming the boundary of a
heating zone.
SEE OR SEARCH THIS CLASS, SUBCLASS:
64 for a furnace chamber port or work path having a fluid
curtain.
Subclass:
23
This subclass is indented under subclass 19. Process
including a procedure by which a desired chemical makeup of
the gaseous material surrounding the work is adjusted or
established.
SEE OR SEARCH THIS CLASS, SUBCLASS:
37 for apparatus under the class definition comprising
automatic control means including an analyzer or composition
sensor of work, work atmosphere or exhaust gas.
Subclass:
24
This subclass is indented under subclass 19. Process
including a step changing an operational parameter to produce
or maintain a desired pressure in the work zone, or
temperature of the work or its surrounding atmosphere.
Subclass:
25
This subclass is indented under subclass 19. Process in
which the atmosphere surrounding the work is caused to
reverse its direction of flow periodically or is given
periodic or rhythmical pressure waves or impulses.
SEE OR SEARCH CLASS:
431, Combustion, subclass 1 for combustion bursts or
flareups in pulses or in serial pattern.
Subclass:
26
This subclass is indented under subclass 19. Process in
which the control of the environment is accomplished by
adjusting the rate, direction, or position of feed of a
component of the work atmosphere.
Subclass:
27
This subclass is indented under subclass 1. Process
including a step of moving particulate heat storage material
as a flowing stream.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215 for apparatus in which a heat generator heats a fluent
mass of solid heat carrying or storing pebbles or particles.
SEE OR SEARCH CLASS:
208, Mineral Oils: Processes and Products subclass 127 for
mineral oil cracking process using a suspension system of
inert materials and subclasses 146+ for a process of chemical
conversion of mineral oil involving solids contacting and
mixing. See the collected notes of this subclass for related
fields for search.
Subclass:
28
This subclass is indented under subclass 1. Process
involving the application of heat to work in a chamber, oven,
or retort in which a heat storage mass or body is used.
Subclass:
29
This subclass is indented under subclass 1. Process for
heating fluid work or providing a high temperature fluid
stream.
Subclass:
30
This subclass is indented under subclass 29. Process in
which a body of material is caused to receive and temporarily
retain sensible or latent heat.
Subclass:
31
This subclass is indented under subclass 1. Process for
heating work by radiation or conduction or for heating a
heating surface.
Subclass:
32
This subclass is indented under the class definition.
Apparatus including structure (1) indicating a condition of
the work or apparatus, (2) providing for the inspection of
the work or apparatus; or (3) providing illumination.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 88
for a drier having a display, inspecting or indicating means
and subclass 89 for a drier having indicating or testing
means.
116, Signals and Indicators, 101 for a thermally responsive
alarm and subclasses 216+ for a thermally responsive
indicator, per se.
122, Liquid Heaters and Vaporizers, subclass 504.2 for a
boiler having an alarm or indicator.
165, Heat Exchange, subclass 11.1 for a residual heat
exchange device having an alarm, indicator, signal, register,
recorder, or test or inspection means.
236, Automatic Temperature and Humidity Regulation, subclass
94 for automatic control by a thermostat with an indicator
or alarm.
340, Communications: Electrical, 500 for electrical
automatic condition responsive indicating systems.
374, Thermal Measuring and Testing, 100 for a temperature
measuring device, per se.
431, Combustion, 13 for a combustion device having an
indicator or inspection means.
Subclass:
33
Apparatus under subclass definition including a means
mounting a work article and heat applicator for relative
movement and a structure following a surface of the article
or a template surface establishing the relative positions of
the article and heat applicator.
SEE OR SEARCH CLASS:
33, Geometrical Instruments, 18.1 for a pattern tracing
subcombination.
228, Metal Fusion Bonding, subclass 7 for a fusion bounding
apparatus in which a machine part follows a template or
pattern and subclasses 25+ for a fusion bonding apparatus in
which an applicator (e.g., of heat of pressure etc.) is
movable along a seam during fusion.
266, Metallurgical Apparatus, 48 for a metallurgical device
for cutting metal by a flame including a support for proper
manipulation of the cutting device.
Subclass:
34
This subclass is indented under the class definition.
Apparatus in which an element of the apparatus is operated or
controlled by engagement with a work unit, or by a holder for
a work unit that is not a part of the apparatus.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 52 for a cooking stove
using liquid or gaseous fuel, the feed valve for which is
controlled by the weight of the article being heated.
219, Electric Heating, subclass 518 for an electrical heater
the switch for which is responsive to the weight, position of
presence of a body to be heated.
228, Metal Fusion Bonding, subclass 9 for a metal fusion
bonding apparatus responsive to the presence, absence, size
or other condition of the work being bonded.
Subclass:
35
This subclass is indented under the class definition.
Apparatus having an element specially provided to be
destroyed or consumed by breaking or fusing upon the
occurrence of a selected condition or event to protect the
apparatus or its surroundings by relieving an unsafe stress
or shutting down the heat emitter.
SEE OR SEARCH CLASS:
49, Movable or Removable Closures, subclass 3 and 4 for
movable closure released or actuated by a fusible
connection.
122, Liquid Heaters and Vaporizers, subclass 504.1 and 504.3
for a fusible type safety device in a boiler.
126, Stoves and Furnaces, subclass 287.5 for a stove having
fusible released damper.
137, Fluid Handling, 72 for a heat destructible or fusible
control element in a fluid handling system of general
utility.
169, Fire Extinguishers, subclass 42 for a fusible device
adapted for use in fire extinguishing apparatus.
431, Combustion, subclass 21 for the control of a burner,
per se, by a combustion destructible element.
Subclass:
36
This subclass is indented under the class definition.
Apparatus that has a means that senses a condition or change
of condition and effects a control on the apparatus.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 524 for the
automatic control of a heater supplying heat to a drier or to
a gas or vapor and solid contact apparatus.
65, Glass Manufacturing, 160 for the automatic control of a
heater for glass manufacturing.
99, Foods and Beverages: Apparatus, 325 for the automatic
control of a food cooking apparatus.
165, Heat Exchange, 201 for the automatic control of a
combined heating and cooling system where the cooling is more
than the reduction to ambient temperature of the heated
material.
219, Electric Heating, 490 for the automatic control of the
power supply, voltage or current of an electrical heater and
subclasses 509+ for an electrical heater having an
automatically controlled switch.
236, Automatic Temperature and Humidity Regulation,
appropriate subclass for an automatically operating
temperature or humidity controlling mechanism actuating a
broadly recited device that modifies temperature or
humidity.
237, Heating Systems, 2 for the automatic control of an
enclosure heating system comprising a combination of heat
generators or a combination of a heat generator and a heat
distribution system.
431, Combustion, 18 for the automatic control of a
combustion device, per se.
700, Data Processing: Generic Control Systems or Specific
Applications, subclasses 1-89 for data processing control
systems wherein the control system is claimed generically,
and subclasses 207-212 for the application of a computer in
the manufacturing of a product which includes heating.
Subclass:
37
This subclass is indented under subclass 36. Apparatus in
which the control includes a device responsive to changes in
the composition of work, of work atmosphere surrounding the
work, or of exhaust material withdrawn from the work zone.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids subclass 557
for the automatic control of the humidity of the contacting
gas in a drier or in gas-solid contact device.
165, Heat Exchange, 223 for the automatic control of a
combined heating and cooling system by a humidity sensor.
200, Electricity: Circuit Makers and Breakers subclass 61.03
for a smoke responsive switch.
236, Automatic Temperature and Humidity Regulation, subclass
44 for a control system responding to and controlling
humidity.
422, Chemical Apparatus and Process Disinfecting,
Deodorizing, Preserving, or Sterilizing, 50 for (a) an
analytical or analytical-control device determining
qualitatively or quantitatively the presence of one or more
chemical constituents of a material which involves a chemical
reaction or (b) combination of a test or measurement and
means for regulating a chemical reaction.
431, Combustion, subclass 76 for the control of a burner,
per se, by a means responsive to the composition of the
combustion products of the burner.
Subclass:
38
This subclass is indented under subclass 36. Apparatus in
which the flow of a fluid protecting the apparatus from
injury, or protective structure, is controlled; or in which a
means sensing the condition of such fluid or structure exerts
a control.
SEE OR SEARCH CLASS:
431, Combustion, subclass 23 for the automatic control of
means protecting a component of a burner from combustion
heat.
Subclass:
39
This subclass is indented under subclass 36. Apparatus in
which the means responding to a sensed condition controls the
operation of a system of regenerators recovering the heat of
a furnace exhaust.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a process of operating a furnace utilizing a heat
storage mass.
Subclass:
40
This subclass is indented under subclass 36. Apparatus
effecting a control on an operating parameter of a hot blast
stove, that is, of a structure comprising a combustion
products generator and a mass of heat storage bricks in which
the combustion products heat the bricks and the bricks after
being heated heat a stream of air.
SEE OR SEARCH THIS CLASS, SUBCLASS:
30 for a process of heating a fluid using a heat storage
mass.
Subclass:
41
This subclass is indented under subclass 36. Apparatus in
which the control is of means dislodging, removing,
collecting or flushing out a material undesirable at all
times or at a particular time of operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2 for a process including cleaning, purging or preventing
undesirable accretion in a heating apparatus.
SEE OR SEARCH CLASS:
431, Combustion, 29 for a combustion device not having
material heating features including a means automatically
controlling a purging or scavenging arrangement.
Subclass:
42
This subclass is indented under subclass 36. Apparatus in
which the control is (1) of a means establishing or adjusting
the position of a heat applicator relative to the work; (2)
of a cooling means that prevents overheat of the work; (3) of
a protective atmosphere supply or (4) of a baffle means that
shields work from a heat applicator.
Subclass:
43
This subclass is indented under subclass 36. Apparatus in
which the control terminates the application of heat to a
unit or batch of work by deactivating the heater, by removing
the work from the heating zone, or by cooling the heating
zone.
Subclass:
44
This subclass is indented under subclass 43. Apparatus in
which a cooling means or cooling period timer is activated in
correlation with the termination of the heating.
Subclass:
45
This subclass is indented under subclass 36. Apparatus in
which the control is (1) of a means moving work into, within,
or discharging it from, a zone in which it is heated or
cooled or (2) by a means sensing quantity, position or
movement of the work.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for a heating apparatus in which an article or template
follower positions a heat applicator relative to the
article.
34 for a heating apparatus having an operating or
controlling device responding to the presence or absence of a
discrete work unit or removable unit holder.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 525
for a heater controlled by the tension or breaking or web or
strand in a drying apparatus and subclass 560 for the
automatic control of the rate of treated material motion in a
dryer.
122, Liquid Heaters and Vaporizers, subclass 447 for cut off
of fuel to a water heater responsive to the quantity of water
in the heater and subclass 451.1 for the automatic control of
a boiler feeder.
Subclass:
46
This subclass is indented under subclass 36. Apparatus in
which the control shuts off or prevents operation of a heater
upon the sensing of an unsafe condition and so disables the
apparatus that external intervention is necessary to return
it to an operative condition.
SEE OR SEARCH CLASS:
137, Fluid Handling, 65 for a combustion failure responsive
fuel safety cut-off for a burner.
236, Automatic Temperature and Humidity Regulation, subclass
21 for a closed fluid heater having an automatic safety
cut-out.
431, Combustion, 18 for combustion devices, per se, having
automatic control systems most of which are of the shut down
type.
Subclass:
47
This subclass is indented under subclass 36. Apparatus in
which pressure within a work chamber, either of the
atmosphere of the chamber or of fluid being heated, is sensed
or controlled.
SEE OR SEARCH THIS CLASS, SUBCLASS:
24 for a process of modulating or stabilizing the
temperature or pressure of the atmosphere in a heating
chamber.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 558
for the automatic control of the gas or vapor pressure in a
treating enclosure of a drier or of a residual gas and solid
contact device.
165, Heat Exchange, 279 and 281+ for an automatic control
responsive to or controlling the pressure in a combined
heating and cooling system.
202, Distillation: Apparatus, subclass 160 for a separatory
distillation column having an automatic temperature or
pressure control means.
219, Electric Heating, subclass 496 for a pressure
responsive control of the power supply to an electrical
heater.
236, Automatic Temperature and Humidity Regulation, 26 for
an automatic temperature control system for a closed fluid
heater that is pressure operated.
431, Combustion, subclass 19 for automatic control of a
burner responsive to pressure in a combustion chamber.
Subclass:
48
This subclass is indented under subclass 36. Apparatus in
which (1) in the feeding of inert or treating fluid is
controlled or (2) the cooling, dilution, withdrawal, return,
mixing, by-pass, circulation or recirculation of work chamber
gas in or from a work chamber is controlled.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 565
for the automatic control of the flow of a treating gas or
vapor in a drier or in a residual gas-solid contact device.
Subclass:
49
This subclass is indented under subclass 36. Apparatus in
which heat generating structure or structure by which heat is
transmitted to the work is controlled or its condition
sensed.
Subclass:
50
This subclass is indented under the class definition.
Apparatus with means supporting, cleaning or protecting a
device sensing a condition of the apparatus or of the work.
Subclass:
51
This subclass is indented under the class definition.
Apparatus in which (1) the time in which or length of time
taken to perform an operation is controlled, (2) there is a
fixed continuous sequential or fixed repetitive operation, or
(3) there is a means terminating a single operation in a
fixed position to restart an additional cycle, which cycle is
more complex than a mere starting or stopping of a single
device.
SEE OR SEARCH CLASS:
165, Heat Exchange, subclass 232 ; 238+ for a residual heat
exchange system controlled by a time or program arrangement.
219, Electric Heating, 492 for the automatic control, by a
system comprising timing or cycling means, of the power
supply to an electrical heating device.
236, Automatic Temperature and Humidity Regulation, subclass
46 for a temperature control system including a timing
element, for nominally recited temperature modifier.
431, Combustion, 18 for a residual combustion device, per
se, controlled by a timer, programmer, retarder or condition
responsive control.
Subclass:
52
This subclass is indented under subclass 51. Apparatus in
which the means controls heating or manipulative operations
on discrete work article or on a body of charge material
handled as a unit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44 for a condition responsive control discharging, or
stopping the heating of, a unit or batch and including a
cool-down timer or means.
Subclass:
53
This subclass is indented under subclass 52. Apparatus ...
in which the means controls (1) a heating chamber access
closure or a heater and (2) a work unit advancer or
manipulator.
Subclass:
54
This subclass is indented under the class definition.
Apparatus including a passage connected to be supplied with
both a heating fluid and a fluid to be heated and flow
control system for the two fluids having structure by which
the flow of one fluid is controlled by the same actuator as
the other fluid or is made dependent upon the actuation of
the other controller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
39 for condition responsive selection or load balancing of
furnace exhaust heated regenerators.
40 for condition responsive control of a hot blast stove.
51 for a control system for heating structure including a
timing, programming or cycling means.
SEE OR SEARCH CLASS:
137, Fluid Handling, 309 for a reversing valve, per se, of
the regenerative furnace type.
Subclass:
55
This subclass is indented under the class definition.
Apparatus in which means are provided for relating various
parts of the heating apparatus so that upon operation of one
part another operating part is cut-off, disabled, stopped or
operated.
Subclass:
56
This subclass is indented under subclass 55. Apparatus in
which the operation of a baffle or furnace door is correlated
with the operation of a device moving work within, feeding
work into, or removing it from a heating zone.
Subclass:
57
This subclass is indented under subclass 55. Apparatus in
which the operation of a means supplying, removing or
circulating a heating gas (e.g., combustion product etc.) is
correlated with the operation of a means moving work within,
inserting it into, or providing access to a heating zone.
Subclass:
58
This subclass is indented under the class definition.
Apparatus having means by which work is moved for scattered
by the flow or pressure of heating gases, the arrangement
being such that the work would not be so moved or scattered
in the absence of the heating gases.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15 for a heating process including the maintainance of a
fluidized bed.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 576 a
drying or gas and vapor contact apparatus with fluid current
conveying of the treated material; and subclass 640 for such
apparatus in which a sheet, web, or strand is supported or
guided by a fluid current.
110, Furnaces, 243 for a refuse incinerator wherein the
refuse is suspended in or supported by a fluid medium.
159, Concentrating Evaporators, 4.1 for a device for
concentrating a liquid by evaporation involving a gaseous
current and a spray device.
239, Fluid Sprinkling, Spraying, and Diffusing, 79 for a
device melting and spraying solid material.
264, Plastic and Nonmetallic Article Shaping or Treating:
Processes, subclass 12 for a process of forming solid
particles from a molten mass by a gaseous jet or blast.
Subclass:
59
This subclass is indented under the class definition.
Apparatus in which the work is in the form of a sheet, web,
or strand and the apparatus flexes, coils or loops the work
as it is advanced longitudinally through the apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
8 for a process including advancing a strip, strand or web
longitudinally through a heating zone.
SEE OR SEARCH CLASS:
26, Textiles: Cloth Finishing, subclass 81, 92, and 106 for
apparatus for expanding (e.g., stretching or spreading) a
running length web of cloth and further including means for
heating or drying the cloth.
34, Drying and Gas or Vapor Contact With Solids, 618 for a
drying or gas and solid contact apparatus for treating a
running length of sheet, web or; and see the reference to
Class 26, Textiles: Cloth Finishing, hereabove.
72, Metal Deforming, subclass 128 for a process of or
apparatus for coiling or curving longitudinally moving metal
with modification or control of the temperature of the work
or of the machine.
Subclass:
60
This subclass is indented under subclass 59. Apparatus in
which the longitudinally moving work is flexed over an
internally heated roll member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
228 for an internally heated roll, per se.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 110 for a
rotary drum drier about which work to be dried is supported
or flexed.
Subclass:
61
This subclass is indented under the class definition.
Apparatus including structure (1) breaking up lumps formed
from particulate material by the heating or (2) dividing work
particles by size with recombining.
SEE OR SEARCH CLASS:
209, Classifying, Separating, and Assorting Solids, subclass
11 for a combination involving heating and classifying
particulate work, except where the sole separation is a
portion of the material for further heating with return of
the separated portion.
241, Solid Material Comminution of Disintegration, subclass
23 for a residual combined comminuting and heat treating
process; and subclasses 65+ for a comminuting apparatus
having means for modifying the temperature of the work
material.
Subclass:
62
This subclass is indented under the class definition.
Apparatus (1) having a specific geos:graphic relationship, or
(2) that is specifically related to but is ancillary to a
nominally recited building or machine.
SEE OR SEARCH CLASS:
60, Power Plants, subclass 648 for a power plant procedure
including the production of withdrawable product or the use
of the plant steam for external heating.
132, Toilet, subclass 118 for a comb having a heater.
184, Lubrication, 104.1 for a lubricator having heating or
cooling means.
219, Electric Heating, 201 for a heater specialized to the
use of electricity combined with a diverse type art device.
221, Article Dispensing, subclass 150 for an article
dispenser having a merely nominal heating or cooling means
for the article handled.
222, Dispensing, subclass 146.1 for a dispenser with merely
nominal heating or cooling means.
Subclass:
63
This subclass is indented under subclass 62. Apparatus in
which the heat generator or applicator is mounted to heat an
element of an internal combustion engine.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines subclass 142.5 for an
internal combustion engine having a heating means.
Subclass:
64
This subclass is indented under the class definition.
Apparatus including structure by which a stream of fluid is
directed to sweep across an opening of a heating or
combustion chamber to hinder or prevent entry or discharge of
gases through the opening.
SEE OR SEARCH CLASS:
110, Furnaces, subclass 179 for a solid fuel furnace having
a fluid screen for one of its openings.
454, Ventilation, 188 for a building having a door or window
provided with a fluid curtain.
Subclass:
65
This subclass is indented under the class definition.
Apparatus comprising (1) a baffle mounted in front of and
spaced from a furnace door acting to shield persons or
articles in front of the door from the heat of the furnace;
or (2) a structure acting to collect and remove any fumes
escaping from the work access area.
Subclass:
66
This subclass is indented under the class definition.
Apparatus having a cooling or absorbing surface over which
gaseous material in or exhausting from a work heating chamber
passes to condense or absorb a component of the gaseous
material.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 73 for a
drier with means treating the gas or vapor to produce
condensation.
126, Stoves and Furnaces, subclass 381.1 and 382.1 for an
open-top liquid heating vessel that may include a lid having
a condenser for steam from the vessel.
202, Distillation: Apparatus, appropriate subclass for a
material heater having means condensing evolved vapor to
produce a liquid product.
266, Metallurgical Apparatus, 144 for a metallurgical
furnace having a fume arrester.
373, Industrial Electric Heating Furnaces, 56 for an
electric furnace combined with a condenser.
Subclass:
67
This subclass is indented under the class definition.
Apparatus in which a work contacting heating gas has solid
impurities removed from it before, during or after contact
with the work.
SEE OR SEARCH CLASS:
110, Furnaces, 119 for a spark arrestor for a solid fuel
furnace.
Subclass:
68
This subclass is indented under subclass 67. Apparatus in
which the separation of the impurities of the gas is before
admittance of the gas, to or while it is within the work
zone.
Subclass:
69
This subclass is indented under subclass 67. Apparatus
having structure by which the separated solid material is
passed from the separating means to the work chamber from
which it came or to a second work heating chamber.
Subclass:
70
This subclass is indented under subclass 67. Apparatus in
which the separator is positioned in a gas flow line between
the work chamber and a heat exchanger fed from the work
chamber.
Subclass:
71
This subclass is indented under subclass 70. Apparatus in
which the separator has structure for the removal of the
separated solids from the apparatus.
Subclass:
72
This subclass is indented under the class definition.
Apparatus including structure for preparing heating chamber
fumes for discharge by diluting them, destroying harmful
vapors in them by combustion, or by purifying them by other
means.
SEE OR SEARCH CLASS:
60, Power Plants, 685 for the treatment of power plant
exhaust.
266, Metallurgical Apparatus, 144 for a metallurgical
furnace having an arrester for metallurgical fume.
422, Chemical Apparatus and Process Disinfecting,
Deodorizing, Preserving, or Sterilizing, 198 for apparatus
for purifying a gas by combustion.
Subclass:
73
This subclass is indented under the class definition.
Apparatus in which structure that generates and supplies
combustion material to, or by which combustion products are
exhausted from work chamber are mounted on a handling means
providing for movement between an operative position and a
removed position leaving an opening providing access to the
structure or work chamber.
Subclass:
74
This subclass is indented under the class definition.
Apparatus combined with means catching, directing or
collecting work atmosphere; work or apparatus material; or
combustion products that have become waster or undesirable
material by escaping from a normal confining or directing
part of the apparatus.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 85
for a drier or gas and vapor contact with solids apparatus
having an apparatus cleaner or escaping material collector.
431, Combustion, subclass 119 for a residual combustion
device having drip or leakage collecting structure.
Subclass:
75
This subclass is indented under the class definition.
Apparatus having a device to render the heating apparatus or
parts thereof free from undesirable material.
(1) Note. Cleaning means for this subclass requires the
installation of additional means or connections to treat the
apparatus, not the material being handled, or the
manipulation of the system in some special way to secure the
cleaning effect.
SEE OR SEARCH THIS CLASS, SUBCLASS:
2 for a process of heater operation including a step of
apparatus purging, cleaning or accretion preventing.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 85
for a drier including structure for cleaning the drier.
431, Combustion, subclass 121 for a residual combustion
device including an apparatus cleaner.
Subclass:
76
This subclass is indented under the class definition.
Apparatus including means, other than the parts making up the
heater and securing them in operative relationship, which
means aids in the assembly or disassembly, or restores or
aids in restoring the apparatus to its former condition after
injury or decay.
Subclass:
77
This subclass is indented under the class definition.
Apparatus combined with a means by which the heated material
is cooled during or after heating.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 62 for a
drier having means cooling the dried material.
65, Glass Manufacturing, 349 for glass annealing or
tempering apparatus including heating and cooling means.
165, Heat Exchange, 61 for (1) a temperature control system
that will both heat and cool a room or chamber (2) a system
in which heat is added to and removed from a fluid stream,
and (3) a residual combination of a heater and a cooling
means in which the cooler does more than merely lower the
temperature of heated work toward ambient temperature.
198, Conveyors: Power-Driven, appropriate subclass for a
cooling bed in which a bar of metal is conveyed while
cooling.
Subclass:
78
This subclass is indented under subclass 77. Apparatus in
which the heat removed from the work is transferred to air on
its way to a burner of the work heating apparatus.
Subclass:
79
This subclass is indented under subclass 78. Apparatus in
which the contact structure is a section of a furnace
traversed by work fed at the top and moved by gravity to a
discharge at the bottom, said section receiving work from a
section of the furnace heating work by combustion of fuel
therein and being traversed by air passing through the work
in the section and entering the combustion zone.
Subclass:
80
This subclass is indented under subclass 78. Apparatus in
which the work being cooled is caused to move relative to
adjacent work or randomly for better exposure.
Subclass:
81
This subclass is indented under subclass 74. Apparatus
including a chamber and means by which heat is supplied to
the chamber and also means by which heat is removed from the
chamber, the two means being optionally usable.
Subclass:
82
This subclass is indented under subclass 77. Apparatus
including means by which heat removed from the work during
cool-down is transferred to work being supplied.
Subclass:
83
This subclass is indented under subclass 77. Apparatus in
which there is a solid barrier through which heat passes
holding the work or work atmosphere separate from the cooling
medium.
Subclass:
84
This subclass is indented under subclass 83. Apparatus in
which the cooling medium held separate from the work in the
work cool-down zone is oxidizer or fuel on its way to a work
heating combustion device.
Subclass:
85
This subclass is indented under subclass 77. Apparatus in
which the work is cooled down by a liquid sprayed on it or in
which it is immersed.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, subclass 111 and 114
apparatus, for the metallurgical treatment of solid metal by
heat and liquid.
Subclass:
86
This subclass is indented under the class definition.
Apparatus with structure receiving treated work that is more
than the structure necessary to simply clear the heating
apparatus to receive additional work material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for apparatus in which the means receiving the work
discharged from the heating zone is a work cooling device.
Subclass:
87
Apparatus under class the definition including structure
moving work to a heating zone that is more than is necessary
to simply charge the apparatus.
Subclass:
88
This subclass is indented under the class definition.
Apparatus comprising a heating assembly (i.e., work holder
and heat source) carried by wheel, skid or handle means.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 261 for a lunch wagon;
subclass 271.1 for a heating device mounted to be moved over
a surface to heat the surface; and subclasses 401+ for a
handled, self-heated, heating or burning tool.
219, Electric Heating, 227 for a hand manipulative
electrical heating tool or instrument and subclasses 386+ for
a portable or mobile electrically heated device including a
container or support for the heater material.
431, Combustion, subclass 345 for a residual burner having
an attached handle.
Subclass:
89
This subclass is indented under the class definition.
Apparatus including means whereby a mode or condition of
operation or use can be changed by shifting or rearranging
all or some of the parts in a different relationship to each
other or by addition or omission of a part.
(1) Note. The mode of operation is not considered to be
charged by the operation of a selector or reversing valve
means acting in its intended manner to select the direction
of flow in a work chamber.
Subclass:
90
This subclass is indented under the class definition.
Apparatus including a chamber in which heat is applied to
work and an associated structure in which vapor is generated
from a liquid by the application of heat.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 7 for a nominal
material heating furnace and a closed water chamber or
conduit located so as to be heated by the waste heat of the
furnace.
Subclass:
91
This subclass is indented under subclass 90. Apparatus
including structure by which vapor from the boiler is
discharged against or passed in heat transferring
relationship to the work in the chamber.
Subclass:
92
This subclass is indented under the class definition.
Apparatus having in combination with the basic heating
structure, additional structure; said additional structure
(1) having a function other than the application of heat to
material, or (2) serving to perfect the basic heating
structure as a whole for its intended purpose.
(1) Note. Basic heating structure includes means holding or
manipulating the work during heating, means for feeding work
into a heating chamber, and means for returning escaping heat
to the heating zone.
(2) Note. The additional structure required by this
definition must be added to the basic heating structure
elements. A detail of an essential element that perfects the
element rather than the combination is classified below. For
example, a heating apparatus element having protective
cooling structure in classified in subclasses 233+ and a
heating chamber structure having expansion relieving or
absorbing means is classified in subclass 251.
Subclass:
93
This subclass is indented under the class definition.
Apparatus including a work heating enclosure and a structure
outside of the chamber for holding and heating unenclosed
work.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, 1 for a domestic type cooking
stove.
219, Electric Heating, subclass 392 for an electrical
heating device comprising an oven and a distinct container or
support for material to be heated.
Subclass:
94
This subclass is indented under the class definition.
Apparatus having (1) two distinctly different types of heat
generators, (2) a heat generator and a source of heat that is
not a generator or (3) a combustion type heat generating
means using two different fuels.
SEE OR SEARCH CLASS:
110, Furnaces, 260 for a residual combustion device burning
gas or oil and solid fuel.
126, Stoves and Furnaces, subclass 36 for a combined solid
fuel and gaseous and liquid fuel domestic type cooking stove;
and subclass 369.1 for a steam box for cooking food products
including means for utilizing a second heating fluid other
than steam, for heating material.
373, Industrial Electric Heating Furnaces, 1 for a furnace
using a combination of electricity and some other heating
medium adapted for operation or granular material such as
ore, or for handling molten material fusing at a very high
temperature.
392, Electric Resistance Heating Devices, 307 for a residual
electrical heating device combined with at least one other
heat source of a nonelectrical nature.
Subclass:
95
This subclass is indented under the class definition.
Apparatus comprising a chamber having a substantially
vertical axis to which material is fed at an elevated level
for gravitation generally downwardly across a heating surface
or through a heating gas.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 165 for a
gravity flow type drier. See the search class note to Class
34 in the class definition of Class 432 for the line between
Classes 34 and 432.
202, Distillation: Apparatus, 120 for a vertical retort in
which a material is heated to drive off a condensible
component.
266, Metallurgical Apparatus, subclass 154 for a
metallurgical shaft furnace having a fume arrester and
subclasses for a 197+ metallurgical shaft furnace. See the
search class notes in the class definition of Class 432 for
the line between Classes 266 and 432.
Subclass:
96
This subclass is indented under subclass 95. Apparatus in
which the work is heated by combustion products formed by the
burning of material within the work chamber or by combustion
products produced externally and fed into the chamber.
Subclass:
97
This subclass is indented under subclass 96. Apparatus
comprising a grid, baffle or restricted passage means in the
vertically extending work chamber, the means serving to act
to restrict the downward movement of the solid work but
permitting the passage of melted material.
Subclass:
98
This subclass is indented under subclass 96. Apparatus
including a material moving member within, or at the chamber
outlet for loosening the material for flow or for causing
movement of the material from the chamber.
SEE OR SEARCH CLASS:
48, Gas: Heating and Illuminating, subclass 85.2 for a
vertical heating chamber for generating heating or
illuminating gas having stirring means for the heated
material.
Subclass:
99
This subclass is indented under subclass 96. Apparatus in
which combustion materials are introduced into the work
material through ports spaced vertically along the work
chamber.
SEE OR SEARCH CLASS:
110, Furnaces, 297 for a mere conventional shaft type
furnace with means for feeding air thereto.
Subclass:
100
This subclass is indented under subclass 96. Apparatus in
which the work chamber has a work material supply port
distinct from the opening through which the combustion
products and any heat generated fumes are discharged.
Subclass:
101
This subclass is indented under subclass 96. Apparatus in
which the combustion products that contact the work in the
work chamber are produced in a chamber distinct from the work
chamber.
Subclass:
102
This subclass is indented under subclass 95. Apparatus
including a heating surface in the form of a tube or flue
located within the chamber and across which the work flows.
Subclass:
103
This subclass is indented under the class definition.
Apparatus comprising a work containing chamber structure
mounted for rotation about a horizontal or slightly inclined
axis, the rotation of the chamber structure imparting a
tumbling motion to the work.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 108 for a
rotary drier or gas or vapor contact with solids apparatus.
See the search notes in Class 432 for the line between
Classes 34 and 432.
110, Furnaces, subclass 246 for a refuse incinerator
comprising a rotary drum.
165, Heat Exchange, subclass 89 for a heat exchange
comprising a rotary drum.
202, Distillation: Apparatus, subclass 100 for a directly,
and subclass 136 for an indirectly heated rotary chamber or
retort used for producing a condensible material from solid
work.
219, Electric Heating, subclass 389 for an electrically
heated revolving container.
248, Supports, subclass 130 for a stand for a movable
receptacle rotating about a horizontal axis.
266, Metallurgical Apparatus, subclass 145 for a rotary
metallurgical furnace with a fume arrester, and subclasses
163, 173 and 213 for metallurgical furnaces of the rotary
drum type.
366, Agitating, 220 for an agitator, per se, comprising a
rotatable mixing chamber.
373, Industrial Electric Heating Furnaces, subclass 84 and
85+ for a tilting or rotating electrical arc furnace.
384, Bearings, subclass 549 for an antifriction bearing for
a rotary drum.
Subclass:
104
This subclass is indented under subclass 103. Apparatus
including means for engaging the top or rim of a stove hole
of a domestic cooking stove for supporting the drum on the
stove.
Subclass:
105
This subclass is indented under subclass 103. Apparatus
having structure by which combustion products are generated
within the work chamber or by which externally generated
combustion products are fed into the chamber.
Subclass:
106
This subclass is indented under subclass 105. Apparatus in
which (1) the drum includes two distinct chambers connected
to provide for serial flow of work material or (2) the drum
has connected thereto a separate chamber that received work
from or feeds it to the drum chamber.
Subclass:
107
This subclass is indented under subclass 105. Apparatus in
which the exterior surface of the drum is heated or in which
there is a flue extending through the work space of the drum
that conducts a hot material in indirect heat exchanging
relationship with work material within the drum.
Subclass:
108
This subclass is indented under subclass 105. Apparatus
having a structural feature providing for continuous movement
of the work material from the inlet of the drum toward and
through the drum outlet.
Subclass:
109
This subclass is indented under subclass 108. Apparatus with
structure feeding a combustion material or a material that
reacts with the work at zones spaced axially along the drum
structure.
Subclass:
110
This subclass is indented under subclass 108. Apparatus
including structure that provides (1) for different rates of
heating of the work at different zones as it moves along the
drum or (2) for different rates of movement of the material
along the drum.
Subclass:
111
This subclass is indented under subclass 108. Apparatus in
which the work material and combustion products move from
drum end to drum end in opposite directions.
Subclass:
112
This subclass is indented under subclass 103. Apparatus in
which the work carried by the drum receives heat by contact
with a heated drum surface or by radiation from a heat
radiating solid structure.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor With Solids, subclass 140, 141,
and 142 for a rotary tumbler drum type drier having a broadly
recited indirect heating means.
Subclass:
113
This subclass is indented under subclass 112. Apparatus
comprising structure for feeding gaseous material into or
removing it from the work chamber of the drum.
Subclass:
114
This subclass is indented under subclass 112. Apparatus
including a heat emitting conduit passing through the work
space of the chamber of the structure or through or along the
cylindrical structure of the drum.
Subclass:
115
This subclass is indented under subclass 103. Apparatus
having a stationary member and a rotary drum and including a
means preventing or controlling dilution or escape of the
drum atmosphere of their junction, the means being a flexible
or cooler seal or an air curtain type flow controller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
64 for a fluid curtain at a work chamber port or work path.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, cross-reference art collection 903 seal for
a rotating kiln or drum or cross-reference art collection 930
for a seal including a heating or cooling feature.
285, Pipe Joints or Couplings, appropriate subclass for a
seal, per se, for a tubular structure.
Subclass:
116
This subclass is indented under subclass 103. Apparatus
including structure protecting an element of the drum device
from heat damage by cooling the element.
SEE OR SEARCH THIS CLASS, SUBCLASS:
115 for a cooler seal in a rotary tumbler drum device.
Subclass:
117
This subclass is indented under subclass 103. Apparatus
including structure by which work, combustion material, inert
gas or a treating agent is fed to the rotary drum.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 130 for a
tumbler drum drier with gas or vapor flow means; and subclass
142 for a tumbler drum drier of the axial material feed
type.
Subclass:
118
This subclass is indented under subclass 103. Apparatus in
which the drum comprises structure effective to act on the
work while within the drum to stir or advance it.
SEE OR SEARCH CLASS:
366, Agitating, subclass 224 for a stirrer, and subclasses
225+ for a deflector in a rotatable mixing chamber.
Subclass:
119
This subclass is indented under subclass 103. Apparatus in
which the drum comprises an outer cylindrical member and an
inner layer made up of ceramic modules.
Subclass:
120
This subclass is indented under the class definition.
Apparatus including (1) a chamber for containing work to be
heated and (2) a source of heat heating the work.
SEE OR SEARCH THIS CLASS, SUBCLASS:
219 for residual apparatus for heating liquid or gaseous
work in a flowing stream.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 201 for a
drier comprising a house, kiln, or container. See the search
class notes in the class definition for the line between
Classes 34 and 432.
126, Stove and Furnaces, subclasses 19-22 for a cooking
stove having an oven, subclass 343.5 for a melting furnace,
or subclasses 344-363.1 for a liquid heater that may include
a kettle, a steam generator, stove pipe for use with a stove,
a domestic water heater or boiler (e.g., kitchen boiler,
range boiler, etc.) for use with a stove or furnace.
219, Electric Heating, 385 for specific electrical heating
structure heating work in or on a container, enclosure, or
support.
237, Heating Systems, appropriate subclass, for a system for
heating a room, house or other enclosing structure including
combinations of two or more heat generators or a heat
generator combined with a system for distributing the heat.
249, Static Molds, subclass 78 and 79+ for a material
shaping mold having heating means.
Subclass:
121
This subclass is indented under subclass 120. Apparatus
including (1) mechanism which carries or moves or stirs work
material in bulk or as a unit or (2) structure by which work
is directed, guided, or otherwise caused to move
progressively through or along different sections of a
heating chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
162 for an unmechanized shelf, rack or tray on a guide or
pivot carrying work into a heating chamber but not
progressing it therein.
SEE OR SEARCH CLASS:
99, Foods and Beverages: Apparatus, 360 for an oven
specialized to cooking food having a conveyor for the food.
Subclass:
122
This subclass is indented under subclass 121. Apparatus
having means for handling or manipulating a distinct
individual work unit as an entity to segregate it from other
units, change its orientation, or position it within the
chamber to present diverse areas of the article to diverse
heating effects.
Subclass:
123
This subclass is indented under subclass 122. Apparatus in
which a handling means outside of the heating chamber carries
a distinct article so that one part of the article is outside
of the chamber and an end or edge of the article is within
the chamber.
Subclass:
124
This subclass is indented under subclass 122. Apparatus
including structure by which the movement of the article
produces a rotation of the article about its axis or a change
of the angle of the axis of the article relative to the axis
of the chamber.
Subclass:
125
This subclass is indented under subclass 122. Apparatus
including a substantially vertical work path in which the
individual articles rest upon each other to form a stack, the
articles being supplied to, removed from, or advanced along
the stack by a pushing device.
Subclass:
126
This subclass is indented under subclass 122. Apparatus in
which work articles are arranged in alignment along a path
and a pushing device moves the column of articles along the
path in alignment.
Subclass:
127
This subclass is indented under subclass 126. Apparatus
including means to overcome any unevenness of the heating of
the article produced by the shielding effect of the article
support upon which the article slides.
Subclass:
128
This subclass is indented under subclass 121. Apparatus in
which work progresses through two distinct chambers.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 180
for a drier having plural units each comprising a stationary
receptacle or tube with an agitator or conveyor and
subclasses 203+ for a housing with conveyors providing plural
zigzag treated material paths.
99, Foods and Beverages: Apparatus, 351 for a filled
receptacle type of food cooking apparatus having successive
treating zones or units.
Subclass:
129
This subclass is indented under subclass 128. Apparatus in
which the chambers are formed by vertically spaced
substantially horizontal shelves or troughs and the work
follows a downward path, dropping from chamber to chamber.
SEE OR SEARCH CLASS:
34, Drying and Gas Vapor Contact With Solids, subclass 178
for a shelf or zigzag treated material flow type of drier.
Subclass:
130
This subclass is indented under subclass 129. Apparatus
including structure by which combustion products are fed to
the work path or fuel is fed to the path for combustion
therein.
Subclass:
131
This subclass is indented under subclass 130. Apparatus
comprising horizontal annular shelves having a common
vertical axis and a rotary shaft at the axis having a work
pushing arm arranged to sweep a shelf.
Subclass:
132
This subclass is indented under subclass 129. Apparatus in
which a shelf or trough transfers heat to the work indirectly
by conduction from heat supplied to the shelf or trough.
Subclass:
133
This subclass is indented under subclass 128. Apparatus
including structure supplying combustion products to the work
path or supplying fuel for combustion therein.
Subclass:
134
This subclass is indented under subclass 121. Apparatus
having structure by which work is acted upon by vibrating or
jarring means to agitate it or to cause it to advance along
the path of travel.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 164
for a drier of the treated material vibrating type.
198, Conveyors: Power-Driven, subclass 521, 533, 594+, 609,
and 752.1 for a vibrating trough conveyor, per se.
Subclass:
135
This subclass is indented under subclass 121. Apparatus in
which the work within the chamber receives heat indirectly
from a heating surface movably mounted to pass through or
across the work or to support and carry the work.
SEE OR SEARCH CLASS:
159, Concentrating Evaporators, 25.1 for a concentrating
evaporator having a closed chamber in which the fluid being
concentrated is heated by a rotatable agitator or coil.
165, Heat Exchange, 86 for a heat exchanger including a
movable heating or cooling surface.
Subclass:
136
This subclass is indented under subclass 121. Apparatus
including structure by which combustion products are admitted
to or formed within the work chamber.
Subclass:
137
This subclass is indented under subclass 136. Apparatus in
which the work moving device is a work supporting section of
the bottom wall of the work chamber, said section of the
chamber wall being mounted for movement relative to the rest
of the chamber on an axle or guide means outside of the
heated work chamber.
Subclass:
138
This subclass is indented under subclass 137. Apparatus in
which the floor section is carried for movement about a
vertical axis.
Subclass:
139
This subclass is indented under subclass 136. Apparatus
including a blade or plough mounted for movement through or
against particulate work to advance the work or change the
interrelationship of the particles.
SEE OR SEARCH CLASS:
110, Furnaces, 225 for a multiple hearth dryer provided in a
refuse incinerator.
366, Agitating, 241 for an agitator having a stationary
mixing chamber and a movable stirrer.
Subclass:
140
This subclass is indented under subclass 139. Apparatus in
which the blade or plough is carried or moved by an endless
belt, rope or chain.
Subclass:
141
This subclass is indented under subclass 136. Apparatus in
which the work is progressed through the work chamber on a
carrying structure mounted for rotation about a central
axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
162 for a work chamber having shelf or rack on a guide or
pivot that is manually operated and serves merely to position
work within the chamber.
Subclass:
142
This subclass is indented under subclass 141. Apparatus
wherein the work support is a horizontal platform mounted for
rotation about a vertical axis.
Subclass:
143
This subclass is indented under subclass 136. Apparatus in
which the chamber means includes a distinct work inlet
opening, a distinct outlet opening, and structure moving work
from the inlet to the outlet or defining a path directing or
guiding work for such movement.
Subclass:
144
This subclass is indented under subclass 143. Apparatus
including structure by which heating gases are withdrawn from
the work path and readmitted to the path at a different
point.
Subclass:
145
This subclass is indented under subclass 144. Apparatus in
which the flow is caused (1) by a plurality of mechanical gas
movers discharging the gas at points spaced along the path of
travel of the work or (2) by a mechanical gas mover feeding a
distributor discharging at regions spaced along the path of
travel of the work.
Subclass:
146
This subclass is indented under subclass 143. Apparatus in
which fuel is fed into the work path at points spaced along
the path for combustion in the path.
Subclass:
147
This subclass is indented under subclass 146. Apparatus in
which the burner includes structure in the path of flame
that, by its mass, conductivity and composition, is
particularly adapted to discharge radiant energy toward the
work path when heated.
Subclass:
148
This subclass is indented under subclass 143. Apparatus
having (1) a closed combustion products conduit exposed to
the path; (2) a baffle guiding the combustion products or
shielding work; or (3) a distinct heat radiating structure
adjacent the path.
Subclass:
149
This subclass is indented under subclass 143. Apparatus in
which a combustion product or a combustion feed material is
discharged into the work path from a plurality of ports
spaced longitudinally along the path.
Subclass:
150
This subclass is indented under subclass 143. Apparatus in
which combustion products are withdrawn from the work path
through a plurality of distinct ports.
Subclass:
151
This subclass is indented under subclass 121. Apparatus
including means for stirring a batch of material in a closed
bottomed, liquid-tight vessel to which access is had from the
top and to which heat is applied externally.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 179 for a
drier comprising a stationary receptacle or tube with
agitator or conveyor.
159, Concentrating Evaporators, subclass 33 for an open pan
having a rake means for evaporating a liquid for the specific
purpose of concentrating it.
165, Heat Exchange, subclass 109.1 for a heat exchange
structure having agitating or stirring means that is equally
adapted to heat or to cool the agitated or stirred material.
366, Agitating, subclass 149 for a mixing chamber having a
heating jacket.
Subclass:
152
This subclass is indented under subclass 121. Apparatus
including an element or distinct structure by which the
atmosphere of the work space is supplied, removed or
circulated.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 181 for a
drier having a stationary receptacle with a conveyor and
structure providing for flow or gas or vapor in contact with
the treated material.
Subclass:
153
This subclass is indented under subclass 121. Apparatus
having means by which the work itself or its carrier is
caused to slide directly on a heat emitting surface of the
work chamber.
Subclass:
154
This subclass is indented under subclass 153. Apparatus in
which there is a pitched blade rotatable about an axis
extending along the heated surface for sliding work along the
surface.
Subclass:
155
This subclass is indented under subclass 121. Apparatus in
which the heat emitting surface is heated by tortuous,
branched or multiple combustion product flue means.
Subclass:
156
This subclass is indented under subclass 120. Apparatus in
which the heating chamber includes structure specializing it
to the reception and positioning of a removable pot or
crucible.
Subclass:
157
This subclass is indented under subclass 156. Apparatus in
which the furnace is mounted on supports providing for
tilting or rocking movement to pour out the contents of the
crucible or pot.
Subclass:
158
This subclass is indented under subclass 156. Apparatus in
which the pot or crucible positioning structure is in the
form of a pedestal surrounded by an annular chamber into
which combustion material is admitted for burning therein.
Subclass:
159
This subclass is indented under subclass 120. Apparatus in
which fuel and oxidizer react within the work chamber to
produce heat or in which a combustion device produces hot
gases that are fed into the work chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
96 for a gravity flow shaft type furnace having combustion
products generated in or fed to the shaft.
105 for a tumbler type rotary drum furnace having combustion
products generated in or fed to the drum.
136 for apparatus having combustion products generated in or
fed to a work chamber that also includes means by which work
is progressed or moved mechanically in the chamber.
SEE OR SEARCH CLASS:
110, Furnaces, appropriate subclasses for a furnace in which
solid material is burned.
431, Combustion, 159 for a fluid fuel disperser installed in
a chamber not having a work related feature.
Subclass:
160
This subclass is indented under subclass 159. Apparatus in
which the furnace as a whole or its structure retaining a
pourable material is mounted so that the furnace contents may
be discharged over an upper edge by tilting.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157 for a furnace specially adapted to receive a removable
pot or crucible mounted to discharge the contents of the pot
or receptacle by tilting.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, 243 for a converter for
treating molten metal comprising a crucible or pot having
tilting or other rotating movement.
Subclass:
161
This subclass is indented under subclass 159. Apparatus in
which means are provided (1) for separating melted from
unmelted solid work material, (2) for retaining all or part
of the melt after removal thereof from the unmelted solid or
(3) for directing flow of such melted work material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
97 for a gravity flow shaft type furnace having a flow
controller restraining solid and passing melt.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, 200 a heating furnace modified
in its structure to adapt it to the collection of flow of
molten metalliferous material.
Subclass:
162
This subclass is indented under subclass 159. Apparatus in
which work is supported by a shelf, tray, or rack mounted for
movement on guide or pivot means or in which the work chamber
is mounted on a guide or pivot means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
141 for a rotability mounted work carrier that moves the
work mechanically or progresses it from zone to zone during
heating.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 184 for a
drier having a rotary or swinging carrier or rack and
subclasses 192+ for a drier of the removable shelf or tray
type.
126, Stoves and Furnaces, subclass 338 for a rotary shelf or
rack for a cooking oven and subclasses 339+ for a sliding
shelf or rack for a cooking oven.
Subclass:
163
This subclass is indented under subclass 159. Apparatus
including means forming two distinct work chambers that are
parts of the same material heating apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
106 for plural distinct serially connected work chambers,
one of which is of the rotary drum tumbler type; and
subclasses 128+ for plural distinct chambers having means for
progressing work or moving it mechanically.
Subclass:
164
This subclass is indented under subclass 163. Apparatus in
which the two work chambers form a common flow path for the
combustion products generated in or supplied to the
apparatus, the products passing first through one and then
through the other of the chambers.
Subclass:
165
This subclass is indented under subclass 164. Apparatus
including a regenerator type heat exchanger connected in line
with the serial connected work chambers.
Subclass:
166
This subclass is indented under subclass 164. Apparatus in
which the plurality of chambers exist as separate
structures.
Subclass:
167
This subclass is indented under subclass 164. Apparatus in
which a dividing wall common to adjacent chambers is
destructible or removable.
Subclass:
168
This subclass is indented under subclass 164. Apparatus in
which one work chamber has opening in the floor for passage
of the combustion products to or from another work chamber.
Subclass:
169
This subclass is indented under subclass 164. Apparatus in
which an opening through a common wall forms a passage for
combustion products.
Subclass:
170
This subclass is indented under subclass 164. Apparatus in
which the structure has a flue or header to which the
structurally related work chambers may be connected by branch
flues to provide for selective parallel or serial
connection.
Subclass:
171
This subclass is indented under subclass 163. Apparatus in
which the two chambers are substantially noncommunicating and
contain or are supplied with gases of distinctly different
chemical compositions as work chamber atmospheres.
SEE OR SEARCH THIS CLASS, SUBCLASS:
18 for a process of heating or heater operation, including
passing work through diverse or temperature graduated
treating zones.
Subclass:
172
This subclass is indented under subclass 163. Apparatus in
which the two chambers are fed with combustion products from
a common combustion product generator.
Subclass:
173
This subclass is indented under subclass 159. Apparatus in
which a conduit, passage, or other structure by which
combustion material for heating the chamber is fed to, or
removed from, a heating chamber is protected from damage by a
cooling means.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 6.5 and 6.7+
for a cooling device for a gas or air port of a nominal
furnace comprising a closed chamber or conduit for water.
239, Fluid Sprinkling, Spraying, and Diffusing, subclass
132.3 for a spray nozzle not specialized to combustion
cooled by a heat exchange fluid.
431, Combustion, subclass 160 for a combustion chamber
having no work material handling feature in which combustion
material feed structure is cooled by a fluid additional to
the combustion materials.
Subclass:
174
This subclass is indented under subclass 159. Apparatus
including a flue by which combustion products by-pass the
work chamber or exchange heat indirectly with the atmosphere
of the work chamber and which are discharged outside of the
work chamber.
Subclass:
175
This subclass is indented under subclass 159. Apparatus in
which a chamber wall is permeated or swept by fuel or
oxidizer and combustion takes place on the surface of the
wall to cause the wall to become a glowing, heat radiating
surface.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, subclass 92 for a direct heat
radiating heating stove including an incandescent fire grate
heated by gaseous or liquid fuel.
431, Combustion, 326 for a porous radiant surface burner,
per se; and subclasses 347+ for a burner, per se, having an
incandescing or reflecting component.
Subclass:
176
This subclass is indented under subclass 159. Apparatus
including means by which a portion of the heating gas passing
from the work zone of the work chamber is delivered back into
the work zone or into combustion material being fed to the
chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
21 for a process of controlling the flame position or work
atmosphere of a heating apparatus including recycling the
work atmosphere; and subclasses 144+ for a work chamber
having means circulating work atmosphere along or across a
path of travel of work from a work inlet to a work outlet.
SEE OR SEARCH CLASS:
110, Furnaces, 203 for refuse incinerators or solid fuel
furnaces provided with exhaust gas recirculation means.
Subclass:
177
This subclass is indented under subclass 159. Apparatus in
which an exhaust flue from the work chamber is within or in
heat exchanging relationship with a wall of the work chamber
to transfer heat therewith.
Subclass:
178
This subclass is indented under subclass 159. Apparatus in
which combustion feed moving toward the work chamber receives
heat indirectly through a wall of the work chamber.
SEE OR SEARCH CLASS:
431, Combustion, subclass 161 for a combustion chamber not
specialized to the heating of materials in which the heat of
the chamber heats the chamber feed.
Subclass:
179
This subclass is indented under subclass 159. Apparatus
including structure in which the gaseous material exhausted
from the work chamber transfer heat to combustion material
being fed to the chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70 for a means between the work chamber and the heat
exchanger separating solid particles or slag from the
exhausting work chamber gas.
Subclass:
180
This subclass is indented under subclass 179. Apparatus
utilizing a heat storage mass that alternately receives heat
from chamber exhaust gases and later discharges the stored
heat to combustion feed material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 for a process of operating a furnace using a heat storage
mass.
39 for the automatic control of the selection or load
balancing of furnace exhaust heated regenerators.
54 for a controller alternating the flow of heated and
heating fluid.
165 for plural work chambers serially connected for flow of
combustion products and having a serially connected
regenerator.
SEE OR SEARCH CLASS:
165, Heat Exchange, 4 for a regenerative type heat
exchanger, per se.
Subclass:
181
This subclass is indented under subclass 180. Apparatus in
which the discharge from the chamber occurs successively or
alternately from spaced exhaust ports and to spaced heat
storage masses.
Subclass:
182
This subclass is indented under subclass 181. Apparatus in
which the combustion feed material heated by the regenerator
is fuel.
Subclass:
183
This subclass is indented under subclass 159. Apparatus in
which the work chamber conforms in shape to an annular
article and also has article conforming product supply or
distribution structure.
Subclass:
184
This subclass is indented under subclass 159. Apparatus
including structure forming an enclosure having one or more
openings or an open front through which an article is
partially inserted to project into the enclosure to be heated
by combustion products.
SEE OR SEARCH CLASS:
34, Drying and Gas Vapor Contact With Solids, subclass 202
for drying apparatus of the article inserted type.
Subclass:
185
This subclass is indented under subclass 159. Apparatus
comprising a cabinet having a combustion products generator
in its lower interior with a combustion product previous
divider thereabove defining separate work and burner chambers
in the cabinet.
Subclass:
186
This subclass is indented under subclass 159. Apparatus in
which combustion takes place in a chamber distinct from the
work chamber and the combustion products pass from the
combustion chamber into the work chamber.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 218 for a
house, kiln or container with gas or vapor circulation for
contact with the treated material. The gas may be combustion
products. However, the combination including a specific
combustion product generator is in Class 432.
Subclass:
187
This subclass is indented under subclass 186. Apparatus
including a line or opening feeding a material to the
combustion products to form a diluted mixture in the work
chamber.
Subclass:
188
This subclass is indented under subclass 186. Apparatus in
which (1) a wall common to the two chambers conducts heat
from the combustion to the work chamber; or (2) a flue
conducting the combustion products between the two chambers
includes a section indirectly heating the work chamber.
Subclass:
189
This subclass is indented under subclass 186. Apparatus in
which combustion air is forced into the combustion chamber by
a pump or a steam jet.
Subclass:
190
This subclass is indented under subclass 186. Apparatus
comprising means causing the products of combustion to flow
both upwardly and downwardly in the work chamber either
alternately, or simultaneously during work treatment.
Subclass:
191
This subclass is indented under subclass 186. Apparatus
comprising two combustion chambers feeding combustion
products to a single work chamber.
Subclass:
192
This subclass is indented under subclass 186. Apparatus in
which a surface of the work chamber has a plurality of
openings or passages over a substantial portion of its area
so that the combustion products enter or leave the chamber
over essentially the entire area of the surface.
Subclass:
193
This subclass is indented under subclass 159. Apparatus in
which work atmosphere is withdrawn from the work chamber
through plural ports spaced from each other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
192 for a work chamber fed by a distinct combustion chamber,
the supply or exhaust from the work chamber being through a
wall floor or roof having multiple perforations.
Subclass:
194
This subclass is indented under subclass 159. Apparatus
including a structure within the work chamber (1) supporting
work, (2) directing the flow of combustion products within
the work chamber, or (3) shielding work or an apparatus
element within the chamber from radiant heat.
Subclass:
195
This subclass is indented under subclass 159. Apparatus in
which the charge rests on the bottom of the furnace and is
heated by hot gases passing over it; the bottom of the
furnace serving to collect or hold molten material.
Subclass:
196
This subclass is indented under subclass 159. Apparatus in
which fuel that burns within the work chamber or the air
supporting combustion within the work chamber, is fed into
the chamber at plural distinct points spaced from each
other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
146 for plural burners longitudinally spaced along a work
path; subclass 149 for combustion material supply ports
spaced along a work path; and subclass 150 for spaced
combustion product exhaust ports spaced along a work path.
Subclass:
197
This subclass is indented under subclass 120. Apparatus
including a liquid or fluent heat transfer medium within the
work chamber and forming a part of the apparatus.
Subclass:
198
This subclass is indented under subclass 120. Apparatus
including structure by which a material of a different
composition than atmospheric air is admitted to the work
chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
23 for a process of establishing or maintaining the
composition of the atmosphere bathing work being heated.
37 for an automatic control responsive to a sensor of the
composition of the work or work atmosphere; and 159+, for a
work chamber in which the work is heated by contact with
combustion products.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 516 for a
residual gas or vapor and solid contact process utilizing a
special gas or vapor contact with a solid apparatus with
means to treat the gas or vapor.
312, Supports: Cabinet Structure, 31 for a residual cabinet
having means to treat material with gas or vapor.
Subclass:
199
This subclass is indented under subclass 120. Apparatus
including a device utilizing mechanical or kinetic energy to
move the atmosphere in the work chamber in a flow pattern
providing for the return of some of the atmosphere to repeat
its transversal of the work.
SEE OR SEARCH THIS CLASS, SUBCLASS:
21 for a process of heater operation including recycling of
the work atmosphere.
144 for apparatus having structure recirculating combustion
products along a work path extending through a work chamber.
152 for a work chamber having a means by which work is moved
and a means providing for distinct atmosphere supply, removal
or recirculation structure.
176 for a work chamber heating work by combustion products
having an exhaust return passage or recirculating fan or
jet.
Subclass:
200
This subclass is indented under subclass 120. Apparatus
including an element or structure by which atmosphere of the
work chamber is vented or admitted.
Subclass:
201
This subclass is indented under subclass 200. Apparatus in
which air drawn from the atmosphere enters, passes through or
across the work in the work chamber and discharges as a
flowing stream.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 218 for a
gas-solid contact house, chamber or kiln having gas or vapor
circulation. The gas or vapor may be heated by a nominal
heater; however, a specific combustion type heater in this
combination makes it classifiable in Class 432.
Subclass:
202
This subclass is indented under subclass 201. Apparatus in
which the traversed work is in contact with a surface acting
to heat the work indirectly or is exposed to an internally
heated radiating surface.
Subclass:
203
This subclass is indented under subclass 201. Apparatus in
which the air stream is caused to flow by a mechanical,
electrical or jet pump.
Subclass:
204
This subclass is indented under subclass 201. Apparatus in
which the work traversed by the flowing air is carried by a
movable or removably mounted tray or drawer.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 197
for a drier of the removable shelf or tray type having gas
or vapor circulation for contact with the work and having a
heater.
Subclass:
205
This subclass is indented under subclass 200. Apparatus
providing for the supply, removal, or maintanence of work
atmosphere to establish a pressure in the work chamber
substantially greater or less than atmospheric pressure.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 92
for a drier treating material in a vacuum chamber.
373, Industrial Electric Heating Furnaces, subclass 54, 63,
110+, and 140+ for an electric furnace in which the material
is heated under pressure or under a vacuum.
Subclass:
206
This subclass is indented under subclass 120. Apparatus
including an inner chamber formed by a removable hood, open
its bottom, that sits on a heating chamber floor to form a
closed inner work chamber within the heating chamber.
Subclass:
207
This subclass is indented under subclass 120. Apparatus
including means forming distinct chambers that communicate
with each other or are formed in the same heating apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
128 for plural work chambers having heating means and
through which work is progressed or moved mechanically; and
163+ for plural structurally related work chambers in which
work is heated by contact with combustion products.
SEE OR SEARCH CLASS:
202, Distillation: Apparatus, 113 for plural structurally
related, externally heated chambers in which carbonaceous
materials are broken down by heat.
Subclass:
208
This subclass is indented under subclass 207. Apparatus in
which two closed work holding vessels providing for discharge
of fluid outside of a furnace structure and that are
necessary parts of the apparatus are mounted on structure
providing for ready removal in a common heating chamber.
Subclass:
209
This subclass is indented under subclass 120. Apparatus
including a work chamber traversed by a heat emitting tube or
rod that supplies heat to the chamber atmosphere or to the
work therein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
102 for a shaft type furnace having a heat emitting tube or
flue within or traversing the shaft chamber.
135 for a work chamber in which a traveling heat emitter
carries or stirs the work.
148 for a work chamber in which work is progressed and
heated by combustion products and that is also heated by a
heat radiator in the chamber.
Subclass:
210
This subclass is indented under subclass 120. Apparatus in
which the work enclosure is a liquid tight receptacle having
a feed opening near, in or for its top and having a normally
closed bottom.
SEE OR SEARCH THIS CLASS, SUBCLASS:
151 for a heated pot having means for stirring its
contents.
156 for a furnace adapted to receive a pot or receptacle in
which work is heated.
197 for a heated tank having a heat transfer liquid or
fluent therein forming a part of the apparatus.
Subclass:
211
This subclass is indented under subclass 210. Apparatus in
which the work container is mounted on a structure by which a
lip of the container may be depressed to cause contents to
discharge over the lip.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157 for a furnace particularly adapted to contain a pot or
receptacle mounted for tilting to discharge the pot or
receptacle.
160 for a furnace or a work holder of furnace in which work
is heated by contact with combustion products mounted for
tilting discharge.
Subclass:
212
This subclass is indented under subclass 120. Apparatus in
which combustion products heating the work chamber atmosphere
move through a conduit means within the wall of the chamber
or including the chamber wall as a part thereof, the conduit
means providing a tortuous, branched, or plural passages to
distribute heat with respect to the chamber while holding the
combustion products separated from the chamber atmosphere.
SEE OR SEARCH THIS CLASS, SUBCLASS:
155 for a chamber through which work is progressed or moved
mechanically heated by multiple combustion product flues.
Subclass:
213
This subclass is indented under subclass 212. Apparatus
including distinct conduits each having its own source of
combustion products.
Subclass:
214
This subclass is indented under the class definition.
Apparatus comprising (1) combustion products generating
structure and a heat storage mass, the combustion products
discharging through or across the mass to heat the mass or
(2) means feeding a fuel and oxidizer into a heat storage
mass for combustion therein.
Subclass:
215
This subclass is indented under subclass 214. Apparatus in
which the heat storage mass is a quantity of fluent solid
particles within a flow structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27 for a process of heating including the flowing or
circulating of a particulate heat carrier mass.
Subclass:
216
This subclass is indented under subclass 214. Apparatus in
which heat storage masses are contained in two distinct lines
connected cases.
Subclass:
217
This subclass is indented under subclass 214. Apparatus
including a casing and a partition therein defining a
distinct combustion chamber and a chamber holding the heat
storage mass.
Subclass:
218
This subclass is indented under subclass 217. Apparatus in
which the partition is an annular member concentrically
arranged within a cylindrical casing.
Subclass:
219
This subclass is indented under the class definition.
Apparatus including a means converting another form of energy
to heat energy and structure for adding the generated heat to
a flowing stream of a fluid or plastic material that is
either work material or a part of the heating apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31 for a residual process of heating a liquid.
40 for the automatic control of an air heater of the hot
blast stove type.
90 for a residual combination of a boiler and a work heating
furnace.
201 for a work chamber to which air from an air heater is
supplied to flow through the chamber.
215 for a heat generator heating a fluent mass of heat
storage material.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, appropriate subclass for
a closed water heater.
126, Stoves and Furnaces, subclasses 67-71 for a heating
stove for air, subclasses 99-119 for a hot air furnace,
subclasses 344-363.1 for a liquid heater that may include a
kettle, a steam generator, stove pipe for use with a stove, a
domestic water heater or boiler (e.g., kitchen boiler, range
boiler, etc.) for use with a stove or furnace, subclasses
500-555 for a fireplace or an accessory thereto, subclasses
561-568 for a solar heat collector for a pond or pool, or
subclasses 569-713 for a solar heat collector.
137, Fluid Handling, 334 for a residual fluid handling
system with heating or cooling of the system.
159, Concentrating Evaporators, appropriate subclass for an
apparatus of general utility in concentrating a liquid.
196, Mineral Oils: Apparatus, 104 for vaporizing apparatus
peculiarly designed for use in the distillation of mineral
oils.
202, Distillation: Apparatus, 163 for a separatory
distillation still.
261, Gas and Liquid Contact Apparatus, 141 for a gas and
liquid contact device having a heat generator.
392, Electric Resistance Heating Devices, 311 for a fluid
heater specialized to the use of electricity as the heat
source.
422, Chemical Apparatus and Process Disinfecting,
Deodorizing, Preserving, or Sterilizing, 285 and 307+ for
apparatus for concentrating liquids in liquids by heat.
Subclass:
220
This subclass is indented under subclass 219. Apparatus in
which a common heat generator furnishes heat to raise the
temperature of a fluid and heat energy to a motor that drives
a mechanical means that increases the pressure or velocity of
the fluid.
SEE OR SEARCH CLASS:
60, Power Plants, 39.01 for a device producing hot gases
under pressure solely disclosed for use in the production of
power.
Subclass:
221
This subclass is indented under subclass 219. Apparatus
having structure by which the heated fluid material is (1)
directed against work or (2) passed in heat transferring
relationship to structure for applying heat to work.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, appropriate
subclass for residual structure for drying or for contacting
a solid with a gas or vapor. See the search reference in the
class definition of Class 432 for the line between Classes 34
and 432.
237, Heating Systems, 50 for a system in which a heat
generator heats air and having a means for distributing the
air to rooms or chambers; and subclasses 56+ for a room or
chamber heating system in which heat from a heat generator is
distributed by flowing water.
239, Fluid Sprinkling, Spraying, and Diffusing, 128 for a
fluid sprinkling, spraying or diffusing device having heating
or cooling means for the system or system fluid.
Subclass:
222
This subclass is indented under subclass 219. Apparatus in
which a stream of fluid is heated by mixing it with products
of combustion from a burner.
SEE OR SEARCH CLASS:
60, Power Plants, 39.53 for a combustion products generator
having means for the addition of steam or water to the
products. This combination is classified in Class 60 even
though there is no disclosure for power purposes.
431, Combustion, subclass 341 for a pot type combustion
device including an exhaust flue having air feed passages and
subclasses 351+ for a flame holder having a flame enclosing
structure with means feeding air at axially spaced points
along the flame.
Subclass:
223
This subclass is indented under subclass 22. Apparatus
including a confining passage by which a stream of the gas to
be intermingled or a stream of combustion feed fluid is
passed in heat exchange with the combustion products flowing
to the mixing zone.
Subclass:
224
This subclass is indented under the class definition.
Apparatus comprising a heat emitter and structure by which it
is inserted into a hollow article or by which a hollow
article is positioned about the emitter for the purpose of
heating the interior of the article.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 104 for a
drier for hollow articles.
166, Wells, subclass 59 for means for burning fuel within a
well.
175, Boring or Penetrating the Earth, subclass 11 for
apparatus for boring the Earth including the direct
application of heat to the formation.
Subclass:
225
This subclass is indented under the class definition.
Apparatus for heating an article including structure for
applying heat to the article with elements (1) for engaging
the article for support of the heating structure by the
article or (2) for engagement with the article to hold it in
fixed operative relationship about the article.
SEE OR SEARCH THIS CLASS, SUBCLASS:
63 for a heater installed on an internal combustion element
for heating the element.
SEE OR SEARCH CLASS:
38, Textiles: Ironing, or Smoothing, 82 for a residual
flat-iron or smoothing textiles.
126, Stoves and Furnaces, 271.1 for a residual surface
heater comprising a heat emitter and means supporting the
emitter spaced from or in contact with a surface to be
heated.
138, Pipes and Tubular Conduits, subclass 35 for a portable
apparatus specialized to thawing a pipe or tubular conduit.
239, Fluid Sprinkling, Spraying, and Diffusing, 398 for a
spraying or diffusing device for combining separately
supplied fluids, per se, and appropriate subclass for such
device supported on and traversing work in which the motion
of the device is determined by the will of the operator.
Such device is often disclosed as a flame torch.
Subclass:
226
This subclass is indented under the class definition.
Apparatus including structure in the form of a mask, shield
or baffle by which a portion of surface area of an article is
shielded from direct heating or has heat concentrated therein
to provide differential heating of the article sections.
SEE OR SEARCH THIS CLASS, SUBCLASS:
10 for a process of heating an article with provision for
localized treating or shielding of a section of the article.
SEE OR SEARCH CLASS:
99, Foods and Beverages: Apparatus, subclass 447 for a heat
distributor for a food cooker.
228, Metal Fusion Bonding, subclass 59 for a heat shield
used in metal fusion bonding and subclass 214 for the process
of bonding while using such a shield.
Subclass:
227
This subclass is indented under the class definition.
Apparatus comprising a device producing heat by chemical,
electrical, or mechanical, means and (1) structure for
supporting work relative to the heat producing means or (2)
structure by which heat is applied to work.
SEE OR SEARCH CLASS:
126, Stoves and Furnaces, 1 for a cooking stove; subclasses
58+ for a direct heat radiating heating stove; subclasses
204+ for a body warmer; subclasses 261+ for a lunch heater;
subclasses 263.01+ for a heater using a chemical type of heat
generator; and 401+ for a hand manipulatable tool having a
work engaging element and fluid fuel burner.
219, Electric Heating, 385 for a heating device combined
with a container, enclosure, or support for material to be
heated.
Subclass:
228
This subclass is indented under subclass 227. Apparatus in
which the work supporting or heat applying structure
comprises a drum having within it a source of heat, and the
exterior of which is adapted to support work and to apply
heat to the supported work.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for a residual heating structure that advances and flexes
a sheet, web or strand and that includes an internally heated
roll.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 110 for a
rotary drum type drier in which the work is treated by the
drum exterior. See the search note to the class definition
of Class 432 for the line between Classes 34 and 432.
38, Textiles: Ironing or Smoothing, 44 for a textile
ironing or smoothing machine of the roller press type and
subclasses 100+ for a roller type smoothing implement.
118, Coating Apparatus, subclass 60 for coating apparatus
including a heated roll for treating the work.
126, Stoves and Furnaces, subclass 410 for a heated, roll
type, hand manipulatable heating tool.
159, Concentrating Evaporators, subclass 11.1 for a
concentrating evaporator using a rotary drum or disk as a
moving film support for the material being concentrated.
165, Heat Exchange, 90 for a heat exchanger of the rotary
drum type.
219, Electric Heating, 469 for a roller specialized for
heating by electricity that supports and heats material.
492, Roll or Roller, for a roll, per se, not elsewhere
provided for, and see the search notes thereunder.
Subclass:
229
This subclass is indented under subclass 227. Apparatus in
which the heat producing means is supported on a means for
carrying it along a path traversing the article.
SEE OR SEARCH THIS CLASS, SUBCLASS:
33 for a heating device in which an article or template
follower positions a heating element relative to the article
being heated.
SEE OR SEARCH CLASS:
228, Metal Fusion Bonding, 25 for a metal fusion bonding
apparatus having an applicator of heat, pressure or flux
movable during fusion.
266, Metallurgical Apparatus, 48 for a metallurgical
blowpipe including a support for proper manipulation of the
same.
Subclass:
230
This subclass is indented under subclass 227. Apparatus in
which the article support provides for movement of the
article relative to the heat produced by the heat generator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for automatic control of or by means sensing or
controlling work movement;
59 for structure, flexing, looping, or coiling a sheet, web
or strand as it advances across or through heating means;
and
122 for a work chamber with heating means having structure
by which the work is progressed or moved mechanically
therein.
SEE OR SEARCH CLASS:
99, Foods and Beverages: Apparatus, 386 for a slice toaster
or broiler having a conveyor; and subclasses 419+, for a spit
or impaling type of food cooking device.
Subclass:
231
This subclass is indented under subclass 227. Apparatus in
which the work support includes structure engaging the
article to hold it in a fixed horizontal and vertical
position relative to the heat emitter.
SEE OR SEARCH CLASS:
12, Boot and Shoe Making, subclass 129.4 for a heated form
for making a shoe.
53, Package Making, 387.4 for a heated or cooled flap or
seam holder.
99, Foods and Beverages: Apparatus, 385 for a slice toaster
or broiler; and subclasses 419+ for a spit or impaling type
of food cooking device.
100, Presses, 300 for a press having means for heating the
material in the press.
126, Stoves and Furnaces, 226 for a device for heating a
tool including structure fro positioning the tool relative to
the heat source.
269, Work Holders, appropriate subclass for a residual device
for clamping, supporting, or holding an article in position
to be operated on or treated.
Subclass:
232
This subclass is indented under subclass 227. Apparatus in
which the structure is a substantially horizontal openwork
grid or rack for holding work against gravity within the flow
path of combustion products.
SEE OR SEARCH CLASS:
99, Foods and Beverages: Apparatus, 444 for cooking
apparatus including a perforated support for food and an
associated drip collector; and subclass 450, for cooking
apparatus comprising a foraminous food support.
126, Stoves and Furnaces, 1 for a cooking stove not having a
feature specializing it for use with food.
Subclass:
233
An element specialized for use in heating apparatus including
structure removing heat from the element to keep it from
being damaged by the heat of the apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
77 for heating apparatus combined with work cooling
structure.
115 for a tumbler drum furnace having a flexible or cooled
seal between the rotary and stationary parts.
116 for a tumbler drum furnace having protective cooling
structure.
173 for a furnace heated by combustion within the chamber
and having protective cooling means for combustion material
feed structure.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 6 for a broadly
recited furnace having a cooling device comprising a closed
chamber of conduit for water.
266, Metallurgical Apparatus, 190 for a metallurgical shaft
furnace having cooling means.
Subclass:
234
This subclass is indented under subclass 233. Apparatus in
which the part is an elongate stationary member along which
work or a work holder is slid.
Subclass:
235
This subclass is indented under subclass 233. Apparatus in
which the cooled element is a part of a work chute, conveyor
or agitator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
116 for a rotary drum furnace having protective cooling
structure.
SEE OR SEARCH CLASS:
165, Heat Exchange, 92 for a hollow stirrer or scraper.
Subclass:
236
This subclass is indented under subclass 235. Apparatus in
which the cooled element is a work or belt supporting roll.
Subclass:
237
This subclass is indented under subclass 233. Apparatus in
which the cooled element is a part of an opening, its cover,
a work cover, or the joint of the cover to the heating
structure e.g. door, cover, door frame, pot rim, etc.
SEE OR SEARCH CLASS:
110, Furnaces, subclass 180 for a solid fuel combustion
furnace door kept cool by the circulation of steam or air
therethrough.
Subclass:
238
This subclass is indented under subclass 233. Apparatus in
which the cooled element is a part of a wall, floor, or roof
of a heating chamber.
SEE OR SEARCH CLASS:
122, Liquid Heaters and Vaporizers, subclass 6 for a closed
chamber or conduit conducting liquid to cool a wall, roof, or
lining of utility in a broadly recited heating or combustion
chamber organization.
373, Industrial Electric Heating Furnaces, 71, 113+, 158, and
165 for an electrical furnace having means for cooling the
furnace walls.
Subclass:
239
This subclass is indented under the class definition. A
subcombination of a heating device, specialized for use in
heating, for feeding or discharging a work chamber or for
conveying or agitating work while within such chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53 for a work unit handler interrelated with a furnace
closure or heating element operator.
86 for a furnace having associated means for receiving work
from the discharge means.
87 for a furnace having associated means for supplying the
furnace feed means.
95 for a gravity flow type shaft furnace through which work
is moved by gravity.
96 for a shaft furnace having an agitator or movably mounted
baffle for the shaft outlet.
103 for a rotary drum-type furnace for tumbling work
material.
121 for a furnace having heating structure and being of the
type in which a charge is progressed or moved mechanically.
157 for a furnace for heating material in a crucible or pot
and mounted to discharge the crucible or pot by tilting to
pour melted material.
160 for a combustion gas heated furnace or furnace work
holder mounted for tilting discharge.
162 for a combustion gas heated furnace charged by a movably
mounted shelf, rack or tray.
211 for an externally heated liquid holding type of work
container mounted for pouring discharge.
234 for a protectively cooled work skid or rail.
235 for a protectively cooled conveyor, chute, or work
agitator element.
SEE OR SEARCH CLASS:
110, Furnaces, subclass 101 for a means for feeding solid
fuel into a combustion furnace.
198, Conveyors: Power-Driven, appropriate subclass for a
power driven conveyor or conveyor element, per se, of general
utility.
221, Article Dispensing, appropriate subclass for a means
dispensing articles or arranging them in a chamber for
dispensing.
222, Dispensing, appropriate subclass for a residual process
or apparatus for dispensing fluent material.
366, Agitating, appropriate subclass for an agitator, per se,
or one having merely nominally recited heating or cooling
means.
414, Material or Article Handling, 147 for the combination
of a chamber of a type utilized for a heating function and
material charging or discharging means therefor. Specific
furnace structure is included there (147+) only when its sole
purpose is to facilitate the movement of material to or from
the chamber furnace. See also subclasses 586+ for a device
or element associated with the handling or moving of a charge
for a heating-type chamber.
Subclass:
240
This subclass is indented under subclass 239. Apparatus in
which the structure includes a means for engaging a stove top
or the rim of a stove hole for supporting it relative to the
heat of the stove.
SEE OR SEARCH THIS CLASS, SUBCLASS:
104 for a rotary drum type agitator having a support for
engaging the surface of a domestic stove.
Subclass:
241
This subclass is indented under subclass 239. Apparatus in
which (1) platform structure that forms part of the floor a
heating chamber is loaded while displaced from the rest of
such chamber and carries the work into the chamber as it is
moved into assembled position; or (2) a cart specialized for
use in carrying work to be heated into a furnace.
SEE OR SEARCH THIS CLASS, SUBCLASS:
136 for a work chamber having combustion product supply
means and a movable floor section carried by an external
guide or axle by which work is progressed through a work
chamber.
Subclass:
242
This subclass is indented under subclass 239. Apparatus
including a means closing or sealing an opening through which
work is moved by the feeder or conveyor into the chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
53 for a work unit handler and a furnace closure operator
controlled to work in a program or cycle.
56 for means correlating door movement and work movement or
placement.
64 for a heating chamber having a fluid curtain at a chamber
port or work path.
Subclass:
243
This subclass is indented under subclass 239. Apparatus in
which a work support within the chamber is moved by an
element extending therefrom through a slit in the chamber
paralleling an external track on which the element is carried
to move the work along the chamber.
Subclass:
244
This subclass is indented under subclass 239. Apparatus
including a seal structure preventing leakage through a
chamber wall about a conveyor or agitator element passing
through the wall.
SEE OR SEARCH CLASS:
277, Seal for a Joint or Juncture, for a generic sealing
means or process, subclass 906 for a seal for an article
having indefinite length (e.g., strip, sheet, etc.).
384, Bearings, 130 for a plain rotary bearing with a seal.
Subclass:
245
This subclass is indented under subclass 239. Apparatus
including or having associated therewith structure
specialized to (1) controlling the flow of heat; (2)
protecting the apparatus or work from heat or (3) relieving
or preventing stress from expansion or contraction produced
by temperature changes.
Subclass:
246
This subclass is indented under subclass 239. Apparatus in
which the feeding or conveying structure is, or includes a
work supporting roll.
SEE OR SEARCH THIS CLASS, SUBCLASS:
60 for an internally heated roll advancing and flexing
sheet, web, or strand type work.
228 for an internally heated roll, per se.
SEE OR SEARCH CLASS:
193, Conveyors, Chutes, Skids, Guides, and Ways, subclass 37
for a conveying roll not specialized for guiding work in a
high temperature environment.
Subclass:
247
This subclass is indented under the class definition.
Apparatus forming the work chamber of an apparatus
specialized for heating work or for use in controlling the
drop in temperature of highly heated work toward ambient
temperature.
SEE OR SEARCH CLASS:
52, Static Structures (e.g. Buildings), appropriate subclass
for a residual static structure; particularly 415 for a
structure assembled of bricks.
110, Furnaces, 317 for the structure of a solid fuel
combustion furnace.
220, Receptacles, 560.12 and 592.01+ for a receptacle having
insulation or other means to maintain its contents above or
below ambient temperature.
Subclass:
248
This subclass is indented under subclass 247. Apparatus in
which the furnace has a melt holding or receiving section
that is specialized to withstand the action of the melt by
having reinforcing means, a lining, or other protective
structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238 for a heating apparatus having a wall, floor or roof
element protected by cooling means.
Subclass:
249
This subclass is indented under subclass 247. Apparatus
including as a part thereof structure that supports or
protects the work, or shields the work area.
SEE OR SEARCH THIS CLASS, SUBCLASS:
253 for an adjunctive means for holding, shielding, or
supporting work within a heating chamber.
Subclass:
250
This subclass is indented under subclass 247. Apparatus
including structure defining (1) a feed or access opening of
a work chamber or (2) a removable cover for such opening.
SEE OR SEARCH THIS CLASS, SUBCLASS:
64 for a heater having a fluid curtain at a chamber port or
work path.
65 for a heat shield or fume collector at a furnace chamber
access area.
73 for a combustion products flue or generator and a work
chamber mounted for relative movement for access.
237 for a protectively cooled door, cover, door frame, or
rim of a cover of a heating furnace.
242 for a closure or seal for an entrance passage through
which a feeding means causes work to move.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, subclass 242
for a chamber seal in a gas-solid contact device.
49, Movable or Removable Closures, appropriate subclass for a
movable or removable closure of general utility.
110, Furnaces, 173 for a door, and subclass 181 for a door
easing or arch, usable in either a heating or solid fuel
combustion furnace.
126, Stoves and Furnaces, 190 for door structure applicable
to a cooking or direct heat radiating heating stove.
Subclass:
251
This subclass is indented under subclass 247. Apparatus
having structure preventing or limiting damage to the
apparatus by relieving or absorbing heat induced expansive
forces.
Subclass:
252
This subclass is indented under subclass 247. Apparatus
comprising a structure of masonry supported or reinforced by
a metallic member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
119 for a rotary tumbler drum type furnace having a brick
type lining.
SEE OR SEARCH CLASS:
110, Furnaces, 336 for wall structure particularly adapted
for use in a solid fuel furnace.
266, Metallurgical Apparatus, 280 for a lining construction
for a metallurgical furnace.
373, Industrial Electric Heating Furnaces, subclass 137, 155,
and 164 for a furnace lining particularly adapted for use in
an electrical furnace.
Subclass:
253
Structure specialized for use in a subordinate or temporary
capacity in heating apparatus comprising (1) means by which a
body or material is held in place in a heating zone or (2) a
protective means for limiting or directing the transfer of
heat from the heating medium or heat radiator to work or
parts of work within a heating zone.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 239 for
means to support solid work for drying or for contact of
solid with gas or vapor.
269, Work Holders, appropriate subclass for a residual device
for clamping, supporting or holding an article in position to
be operated on or treated.
Subclass:
254.1
This subclass is indented under subclass 253. Apparatus
comprising a removable enclosing receptacle or hood specially
adapted for holding articles being heated, shielding them
from the atmosphere, and equalizing the application of heat
to the articles.
SEE OR SEARCH CLASS:
266, Metallurgical Apparatus, 262, for heat transferring
boxes, shields or hoods which are solely disclosed for use in
the heat treatment of metal objects, e.g., annealing boxes,
carbonizing boxes will likewise be found therein.
Subclass:
254.2
This subclass is indented under subclass 254.1. Apparatus
including structure adapted to be lowered about the work
comprising a hood closed on its top and sides and open at its
bottom, or the support upon which such hood is lowered.
SEE OR SEARCH THIS CLASS, SUBCLASS:
206 for a furnace in which a bell-type hood forming a part
of the furnace encloses work in a chamber having heating
means.
Subclass:
258
This subclass is indented under subclass 253. Apparatus
comprising structure for supporting a rigid or semi-rigid
work piece of ceramic material, or coated with ceramic
material, while exposing it to heating fluid or radiant
heat.
SEE OR SEARCH CLASS:
211, Supports: Racks, appropriate subclass for a residual
rack for supporting plural articles and disclosed as having
utility other than, or in addition to, use in the firing of
ceramics.
248, Supports, appropriate subclass for a residual support
for a single article disclosed as having utility other than,
or in addition to, use in the firing of ceramics.
Subclass:
259
This subclass is indented under subclass 258. Apparatus in
which the work support structure provides point or edge
contact with the work piece to provide for maximum exposure
of the surface of the work piece to heat.
Subclass:
260
This subclass is indented under subclass 253. Apparatus
relying on the central passage in an annular body for the
positioning in of the body.
Subclass:
261
This subclass is indented under subclass 253. Apparatus
comprising a container or platform, having apertures or gaps,
for supporting metal work to expose it to heating fluid or
radiant heat.
SEE OR SEARCH CLASS:
34, Drying and Gas or Vapor Contact With Solids, 237 for a
tray or floor for a drier, or for a gas or vapor and solid
contact device.
220, Receptacles, appropriate subclass for a metallic
receptacle disclosed as being of general utility or as having
a use additional to the support of metal work in a high
temperature furnace.
Subclass:
262
This subclass is indented under subclass 253. Apparatus
comprising a refractory vessel for melting or calciming,
metals, ores, etc.
SEE OR SEARCH CLASS:
164, Metal Founding, 335 for metal molding apparatus
including a receptacle for holding or dispensing molten
material.
266, Metallurgical Apparatus, 275 for a receptacle
specialized for holding molten metalliferous material.
Subclass:
263
This subclass is indented under subclass 262. Apparatus
having a dispensing opening or spout.
SEE OR SEARCH CLASS:
222, Dispensing, 566 for a receptacle of general utility
having a nozzle, spout, pouring lip or other material pouring
guide as a dispensing feature.
Subclass:
264
This subclass is indented under subclass 262. Apparatus in
which the crucible has a coated or lined section or is made
of layers of diverse materials.
Subclass:
265
This subclass is indented under subclass 262. Apparatus made
of a named material.
Subclass:
266
This subclass is indented under the class definition.
Miscellaneous apparatus.
CROSS-REFERENCE ART COLLECTIONS
Subclass:
500
The common disclosure of the art in this, digest is a barn
used in the drying, curing, or storing of tobacco. The
disclosures are examples only and are not exhaustive of the
subject matter. They have been placed in this subclass
without regard to their original classification or to their
claimed subject matter.
Information Products Division -- Contacts
Questions regarding this report should be directed to:
U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov
Last Modified: 6 October 2000