Manual of U.S. Patent Classification
as of June 30, 2000

Class
335
ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

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For search strategies, please refer to the Classification Index Explanation of Data web page.

Subclass		Title
ClassTitle		===> ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS
1		COMBINED DIVERSE SWITCHES (E.G., MANUAL-ACTUATED AND ART TYPE)
2		ELECTROMAGNETICALLY ACTUATED SWITCHES
3		. Utilizing magnetostrictive elements
4		. Radio frequency switch (e.g., T/R switch)
5		. . With coaxial components
6		. Automatic circuit-interrupting devices (e.g., circuit-protective devices)
7		. . Responsive to plural diverse circuit conditions (e.g., voltage and current)
8		. . Multipole or polyphase
9		. . . With individual latch or trip means in each leg
10		. . . With common latch or trip means
11		. . Plural switches
12		. . With shunting contacts
13		. . With auxiliary switch means (e.g., for energizing coil)
14		. . With direct connected contact separating means
15		. . With contact biasing, holding or pressure control means
16		. . . Magnetic or electrodynamic (e.g., blowon or blowoff)
17		. . With switch condition signalling, indicating or alarm means
18		. . Responsive to predetermined or abnormal current condition (e.g., direction, phase angle or amplitude)
19		. . . Zero current
20		. . Voltage responsive (under, over or no voltage)
21		. . With latch or trip means
22		. . . Plural latch or combined latch operating means for single latch
23		. . . . With diverse-type actuating means (e.g., magnetic and thermal)
24		. . . Trip-free (i.e., cannot be manually reclosed while overload exists)
25		. . . . With disabling means (for contact-actuator)
26		. . . Reclosing or resetting
27		. . . . Automatic combined with manual
28		. . . . Automatic combined with timing or delay means
29		. . . . . Fluid-controlled
30		. . . . . Mechanical motor-controlled (e.g., clock movement)
31		. . . . . Thermally actuated
32		. . . . . With counting or integrating means (e.g., repetitive for given number of reclosures)
33		. . . . . . With means providing for operation after variable intervals or fixed intervals of different duration (e.g., first reset occurs) instantaneously, with other at longer intervals)
34		. . . . . . With lockout
35		. . . Plural trips or combined operating means for single trip (e.g., magnetic with thermal)
36		. . . . With common structural elements
37		. . . . With thermal element comprising magnetic flux source
38		. . . Magnetic
39		. . . . With time delay (e.g., thermal)
40		. . . . . Responsive to or proportional to degree of overload condition
41		. . . . With magnetic flux winding directly in series with main contacts
42		. . . . With adjusting or calibrating means
43		. . . Thermal
44		. . . . Including ambient temperature compensating means
45		. . . . With regulating, adjusting or calibrating means
46		. . With contact rebound or other undesirable motion prevention means
47		. Utilizing conductive liquid (e.g., mercury)
48		. . Comprising three or more electrodes or circuit-completion means
49		. . With liquid-displacement means
50		. . . Comprising plural interconnected liquid containers
51		. . . Magnetic
52		. . . . Piston or plunger
53		. . . . . Combined with timing or delay means
54		. . . Tiltable or rotating liquid chamber
55		. . Armature structure
56		. . . Comprising freely movable floating slug or mass
57		. . Contact or electrode structure
58		. . . Mercury or mercury wetted
59		. Retarded or delayed type
60		. . Plural sets of contacts alternately, consecutively or selectively opened or closed
61		. . With pneumatic delay means (e.g., dashpot, etc.)
62		. . With hydraulic delay means
63		. . With magnetic or electromagnetically actuated delay means
64		. . With mechanical delay means
65		. . . Motor or motor-controlled (e.g., clockwork)
66		. . Electrothermal delay means
67		. . Adjustable or regulatable
68		. With motor
69		. . Reversible or oscillatable
70		. . Frequency-responsive or synchronous
71		. . Contact actuating structure
72		. . . Plural contacts
73		. . . Eccentric or cam
74		. . . Including brake, clutch or detent
75		. . . . Magnetically actuated
76		. . . Comprising energy storage means (e.g., wound spring)
77		. . With locking, latch or tripping structure
78		. Polarity-responsive
79		. . Storage or memory type (e.g., bistable)
80		. . Armature structure
81		. . . Freely movable within coil or magnetic field between poles
82		. . . Floating (i.e., no fixed pivot)
83		. . Contact structure of composition
84		. . Magnetic structure (e.g., saturable)
85		. . . Pole structure
86		. . With adjusting means
87		. Periodic (e.g., vibrators)
88		. . Plural periodic switches or with plural pairs of contacts
89		. . . Selectively, alternately, or consecutively actuated
90		. . With vibrating or oscillating element damping, frequency adjusting or vibration control
91		. . Actuating magnet structure or material
92		. . . Plural magnets
93		. . Vibratory reed or other periodic contact actuator
94		. . . Tuned or resonant at a particular frequency
95		. . Armature
96		. . . Adjustable
97		. . Contact arrangement or composition
98		. . . Adjustable contacts
99		. Alternating or fluctuating current type
100		. . Induction or eddy current (e.g., vane or closed conductive loop)
101		. . Preselected or synchronous frequency responsive
102		. . Polyphase
103		. . With plural magnetic-actuating structures
104		. . With chatter, bounce or vibration-prevention means
105		. . With damping or adjustment means
106		. Multiple contact type
107		. . Contacts-selectively, sequentially, alternately, or intermittently actuated
108		. . . Automatic telephone type
109		. . . . Plural or multidirection mechanical selector motions
110		. . . . . With motion-conversion means
111		. . . . . Selector structure
112		. . . . . . Crossbar type
113		. . . . With holding, locking or latching means
114		. . . . Rotary selector motion
115		. . . . Reciprocating selector motion (e.g., sliding)
116		. . . . With reset or selector-restoring means
117		. . . . With operational mode-varying means
118		. . . . Motor-driven
119		. . . Plural armatures
120		. . . . With interlocking or mechanical connection
121		. . . Contact-actuation means
122		. . . . With rotary or compound motion device (e.g., rack and pinion)
123		. . . . . Pawl and ratchet
124		. . . . Armature structure
125		. . . . . Rotary armature
126		. . . . Reciprocating or linearly sliding
127		. . Simultaneously actuated
128		. . . By pivotal or rockable armature
129		. . . . Movable contacts or slidable card bar or comb
130		. . . . Movable contacts on circular card or comb structure
131		. . . By reciprocating armature
132		. . With adjustable, replaceable or interchangeable structural features
133		. . Contact structure or arrangement
134		. . . Grid or coordinate
135		. . . In pile or stack
136		. . With plural magnet or coil means
137		. . . Of diverse type
138		. Step-by-step type (e.g., closure responsive to predetermined number of control pulses
139		. . With timing or indexing means (e.g., clock mechanism)
140		. . Ratchet and pawl-type actuator
141		. With electrothermal-actuating means (e.g., expansible wire)
142		. . Fusible element
143		. . Independently operative
144		. . With armature positioning or adjusting
145		. . Bimetallic element
146		. . Thermomagnetic (e.g., device whose magnetic permeability changes with temperature)
147		. Electrodynamically actuated
148		. . Moving coil type
149		. . . Plural coils
150		. . . With reset or restoring means
151		. Vacuum or hermetically sealed type (e.g., reed switch)
152		. . Plural
153		. . With permanent magnet structure
154		. . Armature, contact or contact-actuating means (e.g., sealed reed)
155		. With predetermined current or voltage value-responsive actuator
156		. With protective means for switch or contacts
157		. With operation-inhibiting means (shock resistant)
158		. . From open position
159		. Plural independently operable switches
160		. . Interlocking
161		. . . With cooperative-actuating means
162		. . With unitary housing, support or flux path
163		. . With unitary or common magnetic flux source
164		. Manually or gravity-operated latch with electromagnetic trip
165		. Contact-actuating means unitary with latch or trip
166		. With latch- or trip-reset means
167		. Latching means
168		. . With positive lock (against movement)
169		. . Plural or with auxiliary latch
170		. . Magnetically operated
171		. . Including spring-biasing or energy-storage means
172		. Tripping means
173		. . Plural diverse (e.g., manual plus electromagnet)
174		. . Magnetically operated
175		. . . Utilizing hammer or other impacting means
176		. . . With adjusting or regulating means
177		. Plural magnets or flux sources
178		. . Of diverse electrical characteristics
179		. . Of diverse magnetic characteristics (e.g., permanent plus electromagnet)
180		. . With common core or single armature
181		. . . Pivoted armature
182		. . . Magnetic fields opposing (e.g., differential)
183		. . Magnetic fields or torques acting alternately in opposite directions
184		. . With plural reciprocating armatures aligned or rigidly connected
185		. Contact-actuating means
186		. . Plural or combined (e.g., manual with other)
187		. . Unitary with armature
188		. . Snap-action
189		. . Mechanical linkage
190		. . . Including cam, roller or eccentric means
191		. . . Compound motion device (e.g., toggle)
192		. . With biasing means (open or closed)
193		. . With vibration-, bounce- or chatter-prevention means
194		. . With pressure-maintaining or adjusting means
195		. . . Magnetic or electrodynamic force
196		. Contact composition or structure
197		. . Adjustable or readily detachable
198		. . . Convertible from normally open to normally closed and vice versa
199		. . Printed circuit
200		. . Pivoted or relatively movable independently of the armature
201		. With arc-suppression or extinguishing means
202		. With housing or support means
203		. With armature structure
204		. Through conductor type (i.e., conductor field actuates armature)
205		PERMANENT MAGNET-ACTUATED SWITCHES
206		. Plural switches
207		. Plural magnets
208		. Thermomagnetic
209		MAGNETS AND ELECTROMAGNETS
210		. Electron or ion beam deflecting type
211		. . With magnetic shunt
212		. . With adjustable magnetic element (e.g., to change the air gap, or its position on the cathode ray tube)
213		. . With coil structure
214		. . . With electric or magnetic-shielding means
215		. Magnetostrictive-type device
216		. Superconductive type
217		. Temperature-responsive type (e.g., temp. compensation means)
218		. . With time-delay means
219		. Combined with diverse-type art device
220		. With magneto-mechanical motive device (e.g., electromagnet with armature)
221		. . Frequency-responsive type
222		. . With relatively movable coil and permanent magnet (e.g., D'Arsonval type) position on the cathode ray tube)
223		. . With relatively movable conductors (e.g., dynamometer)
224		. . . Induced current-type movable conductor (e.g., eddy current member)
225		. . . . Rotating disk
226		. . . . Short-circuited winding
227		. . Saturable magnetic type
228		. . With motion-conversion means (e.g., reciprocating to rotary motion)
229		. . With permanent magnet
230		. . . Polarized electromagnet
231		. . . . Varying alternating current amplitude responsive
232		. . . . With plural armatures
233		. . . . . With armature-locking means
234		. . . . With reversible magnetic flux-type movement (e.g., bistable type)
235		. . . . With vibrating reed or spring bar-type armature
236		. . With a shunt path for magnetic flux
237		. . . Adjustable
238		. . With auxiliary armature-movement control means (e.g., manual)
239		. . With time delay armature-movement control means
240		. . . Dashpot type
241		. . . Auxiliary control coil
242		. . . With plural armatures selectively retarded
243		. . Alternating current type
244		. . . Flux phase displacement or varying means
245		. . . . Shading coil
246		. . . . Plural winding type
247		. . . With chatter- or noise-preventing means
248		. . . . Spring or cushion-type vibration absorber
249		. . . . Special armature construction or mounting means (e.g., to assure positive seating of armature)
250		. . . Coil construction or mounting means
251		. . . With plunger-type armature
252		. . . With vibrating armature
253		. . With armature latch means (e.g., means to retain armature in open or closed position
254		. . . With latch-control winding
255		. . With plunger-type armature
256		. . . Plural coils controlling a single armature
257		. . . With shock-absorbing means (e.g., means to absorb the shock of armature or plunger)
258		. . . With armature stroke adjustment
259		. . . Plural plungers
260		. . . With sealed enclosure (e.g., dust or moistureproof)
261		. . . Armature structure or material
262		. . . . With centering or aligning or guiding means
263		. . . . With plunger rotation preventing means (e.g., means to prevent undesired rotation of the plunger during movement)
264		. . . . Sectional plunger
265		. . Plural armatures actuated by single electromagnetic coil
266		. . Plural coils or magnets control armature movement
267		. . . With plural armatures
268		. . . Coils or magnets being separately or selectively controllable
269		. . With dynamically balanced armature
270		. . Armature-mounting means
271		. . . With armature bounce or vibration-preventing means
272		. . . Rotating disk or cylindrical armature
273		. . . With armature-adjusting means (e.g., means to adjust the relative distance between core and armature)
274		. . . With armature-biasing means or bias-adjustment means
275		. . . Hinge joint type armature-mounting means
276		. . . Pivot support type armature-mounting means
277		. . With shock absorption, vibration or bounce-preventing means
278		. . With casing or enclosure
279		. . Armature shape, structure or material
280		. . . Balls, filings or granular material
281		. . Core or pole shape, structure or material
282		. . Coil shape, structure or material
283		. Blade sharpening or conditioning type magnets
284		. For magnetizing or demagnetizing
285		. Work or object holding type
286		. . With workpiece to magnet adapted or fixture (e.g., to bridge flux)
287		. . . Angularly adjustable fixture
288		. . Rotary-type magnetic chuck (permanent or electromagnet type)
289		. . Electromagnet type (e.g., electromagnetic chuck)
290		. . . With circuit control means
291		. . . Lifting or attracting type (e.g., for lifting pigiron or pulling hairpins)
292		. . . . Hermetically sealed or moisture-proofed
293		. . . . Hand-held type
294		. . . . With outer casing or housing
295		. . With magnetic-hold control means (e.g., means to control the hold strength)
296		. Magnet structure or material
297		. . Core structure
298		. . . Movable or adjustable cores
299		. . Coil structure or material
300		. . . With cooling means
301		. . With electric- or magnetic-shielding means
302		. . Permanent magnets
303		. . . Enclosed in flexible plastic, cloth or tape
304		. . . With flux leakage-reducing means
305		. . . Magnetic plug type (e.g., crankcase plug)
306		. . . Plural magnets

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Last Modified: 6 October 2000