Class Definition for Class 49 - MOVABLE OR REMOVABLE CLOSURES

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CLASS 49,	MOVABLE OR REMOVABLE CLOSURES
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SECTION I - CLASS DEFINITION

This is the residual class of closures, which are movable or removable, and of ancillary devices not elsewhere classifiable.

SECTION II - NOTES TO THE CLASS DEFINITION

(1) Note. The terms "closure", "movable closure", and "removable closure", are defined in the glossary.

(2) Note. The schedule of this class was built on patents issued since 1930. Older patents were placed in the schedule mainly on the basis of disclosure and not necessarily on the basis of claimed subject matter.

SECTION III - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

Class 49 is superior to Class 160 and will take a flexible closure panel under the following conditions:

(1) An impact absorbing flexible barricade as set forth in Class 49, subclass 9.

(2) A flexible movable closure combined with an animal blocker, repeller or chaser. See Class 49, subclasses 58+.

(3) Plural flexible movable closures on opposite sides of an independently movable or removable center post. See Class 49, subclass 365.

(4) When the closure does not depend upon its flexibility for movement, e.g., a flexible panel within a rigid frame which is mounted for movement, and is not provided for in the Class 160 schedule.

See subclass 445, for the line between the counterbalances in this subclass and the counterbalances in Class 16, Miscellaneous Hardware (e.g., Bushing, Carpet Fastener, Caster, Door Closer, Panel Hanger, Attachable or Adjunct Handle, Hinge, Window Sash Balance, etc.).

(A) Certain classes take closure combinations where only so much of the closure is claimed as pertains to the subject matter of the class noted. See Class 16, subclass 193, and Class 49, subclass 445, for the lines between the counterbalances in the two subclasses. Also see References to Other Classes, below, for specific Class citations.

(B) Certain classes take a closure claimed as the load by name only or in general terms. See References to Other Classes, below, for specific Class citations.

CLOSURES IN OTHER CLASSES

(A) Art devices having a closure as a part of the combination are classified for the most part with the particular art. The following notes mention some such art combinations, but no attempt has been made to mention all. An attempt has, however, been made to list all classes and subclasses for closures, per se.

(B) Dispensing

Closures constructed for dispensing, specially related to receptacles or containers to assist to promote dispensing, or combined with other dispensing structure have (for the most part) not been listed. In some instances, dispensing structures and/or closures having structure closely related to nondispensing closure structures, have been listed. For such devices, see the appropriate dispensing classification, Class 222, Dispensing, being the generic class, and see the notes in that class for the distribution of dispensing art.

Valve type closures are not here listed; see References to Other Classes, below, for specific citations to the main classes for valves.

(D) Other categories of closures in References To Other Classes include:

Firearms, Ordnance and Ammunition;

Furnace and Heating Classes;

Receptacle, Building Structure and Vehicle Body Classes; and

Miscellaneous classes, not above mentioned, that have closures combined with other things, closures, per se, devices used with closures and devices not used as closures but having analogous structure, considered worth noting.

SECTION IV - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

2,	Apparel, subclass 96 for front closures for coats; subclass 128 for shirt closures; subclass 141.1 for the combination of a collar and a collar closure; subclasses 218 and 219 for placket and waist closures for skirts; subclasses 234 and 235 for trouser closures; subclass 252 for pocket closing attachments; and subclass 270 for sleeve or leg closures.
4,	Baths, Closets, Sinks, and Spittoons, subclasses: 234+ for closet seats combined with covers; 242.1 for covers for closet seats; 246.1+, for operators for closet seats and covers; 253 for closet bowl closures; 256.1 for devices for closing openings in closet bowls; 267+ for spittoon covers and operators; 286+ for covers and stoppers and plugs for basins, sinks and tubs; 607 for movable closures which include means to drain, deflect, or repel shower spray water; and 694 for closures for bath or basin overflow fittings.
5,	Beds, subclass 171 for a bed carried by the door and shifted to position by movement of the door.
14,	Bridges, subclasses 50+ for a movable closure combined with a bridge.
15,	Brushing, Scrubbing, and General Cleaning, subclass 257.6 for a debris receptacle with a movable closure.
16,	Miscellaneous Hardware (e.g., Bushing, Carpet Fastener, Caster, Door Closer, Panel Hanger, Attachable or Adjunct Handle, Hinge, Window Sash Balance, etc.), for closure combinations where only so much of the closure is claimed as pertains to the subject matter of Class 16. Except see subclass 193 of Class 16 for the line between the counterbalances of this subclass (193) and a subclass of Class 49. (Also see Lines With Other Classes of this class (49). )
27,	Undertaking, subclasses 14+ for coffin lids.
34,	Drying and Gas or Vapor Contact With Solids, subclass 242 for a closure sealing an opening in a treating chamber against gas leakage, and having means to permit the introduction of objects through the closure without voiding the seal, e.g., air locks.
36,	Boots, Shoes, and Leggings, subclasses 50.1+ for closures for shoe uppers.
42,	Firearms, subclasses 2+ for breech closures.
43,	Fishing, Trapping, and Vermin Destroying, subclasses 58+ for trap closures.
48,	Gas: Heating and Illuminating, subclass 124 for retort lids, subclass 176 for tanks with bell type closures.
52,	Static Structures (e.g., Buildings), takes (1) a building or barrier having building features in addition to that of merely forming the opening or support for a movable closure, (2) means forming an opening through a barrier, (3) structure having features for removal of a panel section for purposes of repair or initial assembly or final disassembly, (4) a transparent panel (window) with means to treat the panel not elsewhere provided for, and (5) for panels, per se, even though defined as a closure. Also see other Class 52 references in this section for the subclass location of closures in Class 52.
52,	Static Structures (e.g., Buildings), for closures and related structure provided in that class (52), particularly: subclasses 19+ for manholes and roof entrance ways, subclass 37 for disparate articles on or adjacent a closure portal, subclasses 64+ for a barrier section mounted for repositioning, subclass 85 for a curved arch type doorway, subclass 107 for a window well and cover, subclasses 171.3+ for a window pane with treating means, subclass 186 for a closure related to a stair, subclass 199 for a roof vent, subclass 201 for a bay window, subclasses 204.1+ for a closure portal with a specified building feature, subclasses 302.1+ for a wall drain, subclasses 393+ for a window pane spaced from its frame by a yieldable separator, subclasses 455+ for a plural panel door, subclass 473 for a louvered panel with fixed slats, subclass 476 for a releasable, frame section which permits removal of a closure panel for repair, subclasses 764+ for a closure panel, e.g., pane, retained by a separable fastener and subclasses 782.1+ for a closure panel.
59,	Chain, Staple, and Horseshoe Making, subclass 89 for chain links having a pivoted closure.
60,	Power Plants, will take a closure claimed as the load by name only or in general terms.
62,	Refrigeration, subclass 265 for a closure on a cooled compartment, and means blocking the outflow of cooled air when the closure is opened.
63,	Jewelry, subclass 19 for lockets with hinged covers.
68,	Textiles: Fluid Treating Apparatus, subclass 196 for covers for fixed liquid receptacle textile treating machines.
70,	Locks, for closure combinations where only so much of the closure is claimed as pertains to the subject matter of Class 70.
73,	Measuring and Testing, subclasses 330+ and subclass 334 for transparent closure plate type sight glasses.
74,	Machine Element or Mechanism, will take a closure claimed as the load by name only or in general terms.
89,	Ordnance, subclasses 17+ for breech closures and subclass 30 for touch-hole stoppers.
91,	Motors: Expansible Chamber Type, will take a closure claimed as the load by name only or in general terms.
92,	Expansible Chamber Devices, will take a closure claimed as the load by name only or in general terms.
92,	Expansible Chamber Devices, appropriate subclasses for a closure limited for use as a closure for a working chamber of an expansible chamber device.
102,	Ammunition and Explosives, subclass 304 and 333 for plugs to be placed in blast holes to confine the blasting charge, and subclass 532 for gun or cartridge wads.
105,	Railway Rolling Stock, for closures associated with both passenger and freight cars, particularly subclasses 239+ for dumping cars, subclasses 332+ for convertible open and closed passenger cars and subclasses 341+, 343, 348+, 350+, 353, 377, 378, 395, 398, 426+, 437+, 439+, and 450 for various other closures or closure combinations.
109,	Safes, Bank Protection, or a Related Device, subclasses 6+ for plural closures used as a trapping mechanism, subclasses 11+ for a protective shield movable from a retracted position to an operative position, and subclasses 64+ for a movable closure combined with a safe or like structure.
110,	Furnaces, appropriate subclasses, particularly subclasses 112 , 116 and 158 for furnace doors in combination with other furnace structure; subclass 172 for furnace fronts with doors; subclasses 173+ for furnace doors; subclass 180 for doors and casings with cooling means and subclasses 181+ for casings and arches for furnace doors.
114,	Ships, subclasses 27+ for dumping and unloading means for scows, particularly subclasses 35 and 36+ for those having side and bottom doors; subclass 47 for floating dry-docks with end gates; subclasses 116+ for bulkheads and bulkheads provided with doors; subclasses 173+ for ports; subclass 180 for Hawse pipe stoppers and covers; subclass 197 for boat plugs with valves; subclasses 201+ for hatches and covers and subclasses 227+ for leak stoppers.
116,	Signals and Indicators, appropriate subclasses, for nonelectrical signals and indicators for closures.
119,	Animal Husbandry, subclass 11 for a movable partition closure in a stock car, and subclasses 15+ for a confining and housing device having a closure, especially subclass 15.2 for a race track starting stall having a movable gate.
122,	Liquid Heaters and Vaporizers, subclasses 360+ for the structure of headers for water tube boilers; subclasses 497+ for water cooled boiler fronts, subclass 498 having water cooled furnace doors.
123,	Internal-Combustion Engines, for a movable closure which directs the flow of a coolant, e.g., air, to an internal-combustion engine.
126,	Stoves and Furnaces, particularly the following subclasses which occur in the class list in the order noted: 190+, for stove doors and windows; 201+, for stove and fireplace fenders; 211+, for stove lids and tops; 319, for flue stoppers; and 544+, for closures for fireplace openings.
131,	Tobacco, particularly subclasses 176+ , 206, 215.1+, 223, 228, and 242 for tobacco users" appliances having closures.
135,	Tent, Canopy, Umbrella, or Cane, subclass 117 for tent doors.
137,	Fluid Handling, for valves.
137,	Fluid Handling, subclasses 247.41+ for U-seal traps which may include a closure.
138,	Pipes and Tubular Conduits, subclass 89 for closures and plugs, and subclasses 98+ for patches.
150,	Purses, Wallets, and Protective Covers, particularly the following subclasses which occur in the class list in the order noted. 118+ for purse closures.
152,	Resilient Tires and Wheels, subclass 514 for pneumatic tire casing closures and flaps, subclasses 367+ for patches; and subclasses 428 and 431 for inflating valve stem cap combinations.
160,	Flexible or Portable Closure, Partition, or Panel, for: (a) closures utilizing flexible material or fabrics in their panel portions; (b) closures made of plural strips, slats or panels interconnected with one another for relative motion; (c) closures of either or both types (a) and (b) combined with closures of other types. Note that subclasses 90+ of Class 160 provide for the combination of a Class 49 and a Class 160 closure. Class 160 will take a flexible panel of the type provided for where the sole disclosure is flexible, even though the claims are not limited thereto.
165,	Heat Exchange, subclasses 72+ and 134.1+ for a heat exchanger with a removable closure; subclasses 98+ for a movable closure combined with a radiator, and subclass 158 for a heat exchanger with a head closure that forms a manifold.
166,	Wells, subclass 75.13 for well heads having some fluid handling or other feature peculiar to wells.
174,	Electricity: Conductors and Insulators, for a shield or screen having anti-inductive properties, and subclasses 66+ for covers and face plates.
181,	Acoustics, subclass 287 for movable/foldable sound absorbing panels.
182,	Fire Escape, Ladder, or Scaffold, subclass 21 for a window guard or shutter convertible to a ladder, and subclasses 77+ for a door combined with a ladder.
184,	Lubrication, particularly subclass 80 for lubricator cups with closure and valve, and 88.1+ for oil cup closures.
187,	Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle, subclasses 313+ for a barrier in combination with other elevator structure which regulates access to or from an elevator car and subclasses 336+ for means for closing an elevator shaft opening through a landing.
192,	Clutches and Power-Stop Control, will take a closure claimed as the load by name only or in general terms.
192,	Clutches and Power-Stop Control, subclasses 135+ for automatic guards for stop mechanism involving covers.
194,	Check-Actuated Control Mechanisms, appropriate subclasses, and see the search note in subclass 35 of this class (49) for the line.
198,	Conveyors: Power-Driven, subclass 704 for bucket conveying elements with discharging doors.
200,	Electricity: Circuit Makers and Breakers, subclasses 61.62+ for switches actuated concurrently with the use or operation of closures, closure operators or accessories.
202,	Distillation: Apparatus, subclass 190 where a condenser forms a cap or closure for a still, and subclasses 242+ for retort and still closures.
209,	Classifying, Separating, and Assorting Solids, subclass 372 for closures for sifting bins and casings.
210,	Liquid Purification or Separation, subclasses 163+ for grated inlet surface drains, subclasses 244+ for filters in a portable receptacle having a hood or closure, subclasses 435+ for filters in a closed casing, and subclass 541 for filter adjuncts, e.g., filter casings peculiar to that art.
211,	Supports: Racks, subclasses 76 and 82-84 for receptacle racks having closures or closure operators for the supported receptacles.
212,	Traversing Hoists, subclass 166 for door lifters.
215,	Bottles and Jars, subclasses 50+ for bottle necks which are breakable and include a stopper, subclasses 54+ for bottle necks which are breakable and include a stopper and a stopper fastener and 200+ for bottle closures in general.
217,	Wooden Receptacles, subclasses: 56+ for box closures; 76+for barrel closures; 98+ for barrel bungs; and 124 for basket closures.
220,	Receptacles, subclasses 200+ for movable or removable closures for a receptacle.
221,	Article Dispensing, subclasses 289+ for article dispensers having closures operated to effect the mechanical release or separation of articles from a source of supply.
222,	Dispensing, appropriate subclasses,and see Lines With Other Classes, Closures in Other Classes, Note B, supra.
229,	Envelopes, Wrappers, and Paperboard Boxes, subclasses 76+ for an envelope closure, 124+ for a box closure, and 92.5 and 92.7 for a letter sheet closure; 25+, 33, 36, 38+, and 124+ for folded blank box closures; 43+, for other box closures; 62+, for bag closures; 76+, for envelope closures; and 92.5 and 92.7 for letter sheet closures.
231,	Whips and Whip Apparatus, subclass 6 for caps analogous to closures.
232,	Deposit and Collection Receptacles, particularly subclasses: 14 for change gates; 22, for letter boxes combined with door or window; 25+ for letter boxes combined with cooperative closures; 42 for milk receptacles combined with door or window; 43.1+ for deposit and collection receptacles having separate inlet and outlet openings and closures for said opening; and 44+ for closures and chutes.
238,	Railways: Surface Track, subclasses 74 , 75, 76 for ties in the form of rectangular tubes with separate top and/or bottom plates, and subclass 104 for end closures for tubular ties and tie casings.
246,	Railway Switches and Signals, particularly subclasses: (A) 125+ for closures automatically actuated or controlled from a moving train or vehicle by electrical means, and (B) or actuating means, many of which are for closures: 218+ for electric for electric actuating means; 257+ for fluid motor actuating means, particularly subclasses 261 ; 262+ for mechanical motor actuating means; 270+ for vehicle-energy actuating means, particularly subclasses 272 and 292+.
248,	Supports, subclass 134 for a receptacle, tiltably mounted on a stand, and wherein movement of the receptacle operates a closure.
249,	Static Molds, subclass 205 for stoppers for use in metal ingot and pig molds.
251,	Valves and Valve Actuation, for valves..
256,	Fences, subclass 1 for fences with gate closures.
266,	Metallurgical Apparatus, subclass 272 for devices for closing the tap hole or tuyere to stop flow of molten material.
277,	Seal for a Joint or Juncture, for a generic sealing means or process, cross-reference art collection 921 for a closure or weather strip seal.
285,	Pipe Joints or Couplings, subclass 119 for a pipe end closure combined with a spaced pipe-to-plate joint, and subclasses 148.6+ for a pipe or cable and box coupling comprising pipe or cable clamping means having an attached closure flange.
292,	Closure Fasteners, for closure combinations where only so much of the closure is claimed as pertains to the subject matter of Class 292. Except, see the search notes in this class (49), subclass 414 for the line between the friction bearings of that subclass and the double acting bolts in subclasses 14+ and 70+ of Class 292, and see the note in subclass 356 for the line between the push rod actuators of this class (49) and the extension links in subclasses 262+ of Class 292.
296,	Land Vehicles: Bodies and Tops, subclasses 146.1+ for either (a) a plurality of access barriers or closures about a vehicle body or (b) an access barrier or closure combined with a feature or accessory of a vehicle body (e.g., sill, side rail, windshield, seat armrest, visor, etc.); subclasses 210+ for an access barrier or closure combined with structure defining a vehicle top (roof) (e.g., sun roof and/or moon roof, etc.). Class 49, Movable and Removable Closures, is the controlling class for a single door and/or window for a single opening in either a vehicle body or top in the absence of a defining feature or accessory correlated to a vehicle body or top, respectively.
296,	Land Vehicles: Bodies and Tops, particularly subclasses: 50 for end gates; 77.1+ for storm fronts including windshields; and 146.1+ for doors and windows.
298,	Land Vehicles: Dumping, particularly subclasses 6 , 23, and 27+ for closures for dumping vehicles.
303,	Fluid-Pressure and Analogous Brake Systems, subclass 6.1 for a fluid pressure brake for controlling a fluid motor which operates a closure.
312,	Supports: Cabinet Structure, for appropriate subclasses for closures which are components of cabinets.
318,	Electricity: Motive Power Systems, will take a closure claimed as the load by name only or in general terms.
340,	Communications: Electrical, subclasses 545.1+ for electrical signals automatically responsive to the condition of a closure.
359,	Optical: Systems and Elements, subclasses 591+ for means to illuminate the interior of a building with exterior light.
362,	Illumination, particularly subclass 100 for door knob or keyhole illuminators, subclass 375 for casing closures for lanterns, subclasses 455+ for devices analogous to closures for dimming lanterns, subclass 127 for socket covers and for lens holders.
366,	Agitating, subclasses 242+ for a stirrer mounted in a removable closure of a stationary mixing chamber, and subclass 347 for mixing chamber covers and shields.
368,	Horology: Time Measuring Systems or Devices, particularly subclasses 294+ for bezels and crystals; and subclass 312 for spring covers.
383,	Flexible Bags, subclasses 42+ for a bag closure.
384,	Bearings, subclasses 189+ , for a lid or closure plate for an exterior car journal box.
396,	Photography, subclasses 452+ for camera shutters and subclasses 517+ for plateholders having closures.
400,	Typewriting Machines, subclasses 713+ for resilient covers for typewriter keys analogous to closures.
404,	Road Structure, Process, or Apparatus, subclass 23 for a pavement with removable light admitting means and subclasses 25+ for a pavement with a vault-cover closure.
405,	Hydraulic and Earth Engineering, subclass 6 for dry dock gates; subclass 42 for an end cap on an irrigation conduit; subclasses 85+ for canal locks; subclass 87 for water gates; and subclass 107 for dams and levees.
406,	Conveyors: Fluid Current, subclasses 147+ and 176+ for pneumatic dispatch transmission tube terminals, many of which have closures; and subclasses 186 and 188+ for carriers having side openings and end openings, respectively, with closures.
410,	Freight Accommodation on Freight Carrier, subclasses 143+ for a brace panel or bulkhead movably or removably positioned wall-to-wall athwart a freight carrier.
414,	Material or Article Handling, subclasses 164 , 169+, 200+, 221, 328+, 369, 387+, 407, 414, 472, 519+, 545, 556+, 616, 644, and 657+ for structure in the nature of a closure.
418,	Rotary Expansible Chamber Devices, will take a closure claimed as the load by name only or in general terms.
428,	Stock Material or Miscellaneous Articles, appropriate subclasses, for a sheet with corner or perimeter structure, as in subclasses 81+ which may be usable as a closure.
429,	Chemistry: Electrical Current Producing Apparatus, Product, and Process, subclass 174 , and 185 for battery having sealing means (material), and subclasses 175 and 177 for battery covers.
439,	Electrical Connectors, subclasses 135+ for an electrical connector with a movable or removable closure therefore.
449,	Bee Culture, subclasses 20+ for a passageway in a bee hive or into a bee hive.
454,	Ventilation, for closures of various types having ventilating features, particularly subclasses 284+ for registers and specifically subclasses 309+ for louvers.
454,	Ventilation, takes a plurality of spaced movable closures especially arranged to utilize natural laws or phenomena to effect ventilation, e.g., top and bottom ventilation for a window whereby fresh air enters at the bottom and stale air leaves at the top, and for a movable closure combined with ventilation means to supply, distribute, regulate, treat or direct air in a tortuous path or to change the direction of flow of the air. A mere through passage in a wall combined with a closure for the passage of air is classified in this class (49).
475,	Planetary Gear Transmission Systems or Components, will take a closure claimed as the load by name only or in general terms.

SECTION V - GLOSSARY

ACTUATOR

(See OPERATOR) The force input means to the closure for imparting movement thereto, e.g., an operator. The term is broader than "operator" since a handle which does not move relative to the closure is considered an actuator.

BARRIER

A construction forming an extended indefinite surface preventing or inhibiting the passage of persons or things, e.g., wall, ceiling, floor, roof or cover.

CABLE

A flexible connector such as a rope, chain or the like.

CLOSURE

A closure is an obstructive structure whose presence in or before a passage bars traffic through the passage. The character of passage varies depending on the thing or things the passage is intended to accommodate. For example, a single rod across a doorway prevents passage of a person but not a small animal; a letter slot permits passage of a letter but not a large package, a window sash permits passage of light but not air, a shutter permits passage of air but restricts the passage of light.

LEVER

An elongated rigid arm which is pivoted at least one point along its length.

LINK

A type of lever which is pivoted at two or more points along its length, usually at its extremities.

MOTOR DRIVEN OR ACTUATED

A powered means such as a motor or engine utilized as the moving force or input of the operator. A mere spring is not a powered means, but a motor having a spring as the source of power is included within the meaning of the term defined.

MOVABLE CLOSURE

A closure mounted to move in a regular, repetitive, predetermined path with respect to a passage so as to alternately open or close the passage.

MULTIDIRECTIONAL MOVEMENT

Motion along two or more distinct lines of travel or about two or more axes of rotation or a combination thereof, in a single operation.

OPERATOR

A manipulatable mechanical means, movable relative to the closure, for imparting movement to the closure relative to its mounting means, in its opening or closing movement. A mere spring which effects the movement of the closure, for example, by utilizing the stored energy to return the closure to starting position, is not included within the meaning of this term.

PANEL

A sheet-like member which is a section of a closure structure.

PORTAL

Structure defining an opening through a barrier for the passage of persons or things, e.g., the framing of a door or window opening.

REMOVABLE CLOSURE

A closure which is mounted so as to be readily physically disassociated from its supporting structure to form a passage.

RECTILINEAR MOVEMENT OF CLOSURE

Straight line motion in opposite directions, such as up and down, right and left, to open or close a passage.

SLIDING MOVEMENT OF CLOSURE

Rectilinear motion which is constrained by stationary guides on the supporting member(s).

SLIDE-STILE

An elongated member extending along the edge of a closure in opposition to a portal frame member, e.g., jamb, and connectable to the closure for sliding therewith.

SWINGING MOVEMENT OF CLOSURE:

A turning motion about a pivot to open or close a passage.

SUBCLASSES

[List of Patents for class 49 subclass 1]

THERMAL RELEASER OR ACTUATOR:

This subclass is indented under the class definition. Device provided with means for retaining a closure in a desired position, or with means for imparting movement to the closure, said means including a device which when under the influence of heat will release the retaining means or set in motion actuating means to permit or cause the closure to move to a different position.

SEE OR SEARCH CLASS:

16,	Miscellaneous Hardware (e.g., Bushing, Carpet Fastener, Caster, Door Closer, Panel Hanger, Attachable or Adjunct Handle, Hinge, Window Sash Balance, etc.), subclass 48.5 for a thermally released door check or closer.
52,	Static Structures (e.g., Buildings), for a static structure with a reactive component, e.g., meltable section.
109,	Safes, Bank Protection, or a Related Device, subclass 33 for a bank protection device with thermally controlled fluent material means.
116,	Signals and Indicators, subclasses 101+ for thermal alarms.
126,	Stoves and Furnaces, subclass 287.5 for a thermally released damper.
137,	Fluid Handling, subclasses 72+ for valves controlled by a fusible or heat destructible element, and subclasses 79+, 457 and 468 for other heat responsive valves.
169,	Fire Extinguishers, subclasses 56+ for condition responsive controls in special applications, subclass 19 for automatic valves, subclasses 37+ for sprinkler heads, and subclass 42 for fusible connections.
222,	Dispensing, subclass 54 for a thermally controlled dispensing device.
236,	Automatic Temperature and Humidity Regulation, subclasses 32 and 33 for thermostats.
292,	Closure Fasteners, subclass 144 for thermally operated sliding bolts and subclass 201 for thermally operated swinging bolts.
337,	Electricity: Electrothermally or Thermally Actuated Switches, subclasses 298+ for thermally controlled electrical switches.
361,	Electricity: Electrical Systems and Devices, subclasses 103+ for thermally controlled (e.g., fusible) circuit interruption.
454,	Ventilation, subclass 28 for a thermally released outlet cowl and subclass 369 for thermally actuated fire dampers used in ventilating systems.

[List of Patents for class 49 subclass 2]

Nonfusible:

This subclass is indented under subclass 1. Device wherein the heat responsive device returns to its original shape and position when the heat of actuation is removed, and reacts cyclically upon the reapplication of heat, as distinguished from meltable elements, such as fusible links, which must be replaced after each use.

SEE OR SEARCH CLASS:

160,	Flexible or Portable Closure, Partition, or Panel, subclass 6 for a nonfusible thermal initiator for the automatic control of a closure of that class.

[List of Patents for class 49 subclass 3]

Common fuse releases closures for plural openings:

This subclass is indented under subclass 1. Device provided with a plurality of closures for a plurality of openings and wherein a single thermally responsive device, releases all of the closures, e.g., separate fusible means for each closure arranged so that the fusing of any one of the fusible means will permit all closures to be released.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5,	for plural sliding closures for a single opening wherein the closures are counter-balanced by each other, and wherein a single thermally responsive device releases all closures.

[List of Patents for class 49 subclass 4]

Pull cable with fusible connection:

This subclass is indented under subclass 1. Device wherein the retaining means includes a cable which is grasped by hand to move the closure, e.g., against gravity or a biasing means, and wherein thermally responsive device will release the cable and permit the closure to return.

SEE OR SEARCH THIS CLASS, SUBCLASS:

347,	for a one direction pull cable actuator for a closure.

[List of Patents for class 49 subclass 5]

Terminates counterweight condition:

This subclass is indented under subclass 1. Device wherein the retaining means includes a counterweight which counteracts the weight of the closure, and wherein the thermally responsive device includes means which disturbs the balance of the counterweight and closure, e.g., devices in which the weight of one closure balances the weight of another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

119,	for closures interconnected for opposed concurrent movement in which one closure counter-balances the weight of the other.

6	Overbalanced by released weight supplementing counterweight:
	This subclass is indented under subclass 5. Device wherein the thermally responsive device releases a weight which, together with the counterweight, overcomes the weight of the closure to move it.

[List of Patents for class 49 subclass 7]

Fusible closure latch or retainer:

This subclass is indented under subclass 1. Device wherein the retaining means holds the closure in a desired position, and wherein the device melts to release the closure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

503,	for a closure panel modified to receive a latch or lock, and see the search notes thereto for the loci of closure latches.

8	Fusible connector disengages pawl or catch:
	This subclass is indented under subclass 7. Device wherein the retaining means includes a locking device provided with a holding detent, and means to withdraw or permit it to withdraw from its holding position upon melting of the fusible means to release the closure.

[List of Patents for class 49 subclass 9]

IMPACT ABSORBING FLEXIBLE BARRICADE:

This subclass is indented under the class definition. Device comprising a flaccid or resilient closure supported in closed position by a yieldable means, so that the inertia of a moving object striking the closure is absorbed and the object is slowed or stopped.

(1) Note. Included here are highway barricades placeable before bridges, chasms and crossings to selectively bar traffic thereto.

SEE OR SEARCH THIS CLASS, SUBCLASS:

34,	for a flexible closure which distorts in its opening or closing movement.
192+,	for a railroad crossing gate, normally swinging in a vertical plane between open and closed positions and movable about a vertical axis in its closed position, e.g., when struck by a vehicle attempting to use the barred passage.
460+,	for a protector which guards a closure against damage.

SEE OR SEARCH CLASS:

109,	Safes, Bank Protection, or a Related Device, subclasses 64+ for safe and bank closures constructed to absorb attacks of force.
244,	Aeronautics and Astronautics, subclasses 110+ for airplane landing arresting gear.

[List of Patents for class 49 subclass 10]

FLOOD ACTUATED:

This subclass is indented under the class definition. Device wherein the closure is mounted in or adjacent a stream bed to extend thereacross and to impede passage of objects therethrough, and wherein the closure is opened by the presence of abnormal amounts of water, e.g., flood stage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21,	for a closure released for movement or directly actuated by an ambient fluid, e.g., rain or snow.
131,	for a closure pivoted adjacent its lower edge so that in open position it lies upon or below the surface upon which it is mounted.

SEE OR SEARCH CLASS:

256,	Fences, subclass 13 for fence panels which are not mounted for movement, but are particularly adapted for use on shores or in beds of streams.
405,	Hydraulic and Earth Engineering, subclasses 87+ for gates or closures adapted to regulate the height of a water level.

11	Float or vane controlled latch release:
	This subclass is indented under subclass 10. Device provided with a means which is responsive to a rise in the height of the water in the stream or to an increase in the velocity of the stream to release means holding the closure in closed position.

12	Axially pivoted picket pole:
	This subclass is indented under subclass 10. Device comprising a shaft having bars or rods projecting therefrom to form a barrier, and wherein the shaft is mounted to turn about an axis parallel to the axis of the shaft.

[List of Patents for class 49 subclass 13]

CLOSURE CONDITION SIGNAL OR INDICATOR:

This subclass is indented under the class definition. Device comprising a means acting only to produce a perceptible, e.g., audible or visual manifestation of a position of a closure.

SEE OR SEARCH CLASS:

109,	Safes, Bank Protection, or a Related Device, subclass 38 for a device of that class combined with a signal or indicator, particularly subclass 43 for one which is initiated by closure movement.
116,	Signals and Indicators, subclass 85 for closure operated burglar alarms, i.e., alarms to announce unauthorized attempts to use the closure-barred opening, and subclass 100 for structurally installed closure operated alarms to indicate the presence of a visitor, or combined with a fire alarm box to give a local alarm when the box closure has be