US PATENT SUBCLASS 335 / 2
ELECTROMAGNETICALLY ACTUATED SWITCHES

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

2ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
3  DF  .~> Utilizing magnetostrictive elements
4  DF  .~> Radio frequency switch (e.g., T/R switch) {1}
6  DF  .~> Automatic circuit-interrupting devices (e.g., circuit-protective devices) {12}
47  DF  .~> Utilizing conductive liquid (e.g., mercury) {4}
59  DF  .~> Retarded or delayed type {7}
68  DF  .~> With motor {4}
78  DF  .~> Polarity-responsive {5}
87  DF  .~> Periodic (e.g., vibrators) {6}
99  DF  .~> Alternating or fluctuating current type {6}
106  DF  .~> Multiple contact type {5}
138  DF  .~> Step-by-step type (e.g., closure responsive to predetermined number of control pulses {2}
141  DF  .~> With electrothermal-actuating means (e.g., expansible wire) {5}
147  DF  .~> Electrodynamically actuated {1}
151  DF  .~> Vacuum or hermetically sealed type (e.g., reed switch) {3}
155  DF  .~> With predetermined current or voltage value-responsive actuator
156  DF  .~> With protective means for switch or contacts
157  DF  .~> With operation-inhibiting means (shock resistant) {1}
159  DF  .~> Plural independently operable switches {3}
164  DF  .~> Manually or gravity-operated latch with electromagnetic trip
165  DF  .~> Contact-actuating means unitary with latch or trip
166  DF  .~> With latch- or trip-reset means
167  DF  .~> Latching means {4}
172  DF  .~> Tripping means {2}
177  DF  .~> Plural magnets or flux sources {5}
185  DF  .~> Contact-actuating means {7}
196  DF  .~> Contact composition or structure {3}
201  DF  .~> With arc-suppression or extinguishing means
202  DF  .~> With housing or support means
203  DF  .~> With armature structure
204  DF  .~> Through conductor type (i.e., conductor field actuates armature)

DEFINITION

Classification: 335/2

(under the class definition) Devices including operating or actuating means for opening or closing the switch contacts and in which at least one of such operating or actuating means is an electromagnet. For purposes of classification in this subclass an electrical circuit is considered to be the equivalent to a single continuous conductor joining a source

to a load through a device capable of interrupting or completing the continuity of the conductor.

(1) Note. The subject matter to be found in this and the indented subclasses includes devices known as "electromagnetic switches", "circuit breakers", "relays" and "electromagnetic interrupters".

(2) Note. Devices commonly known as "relays" and which, by enclosure, contain all the essential structure to make a switch, but in which the claimed subject matter does not include actual contact structure are in this class in subclasses 209+ below.

(3) Note. For electromagnetically actuated switches forming an element of an electrical control circuit for a particular art device search should be extended to the art class relating to the particular art device to be controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

209+, below, for subject matter relating to electromagnet with armature and for electromagnet or magnet structure, per se. SEE OR SEARCH CLASS

178, Telegraphy, appropriate subclasses for electromagnetically operated switching devices and keying devices or other code transmitters especially adapted for the telegraph art.

200, Electricity: Circuit Makers and Breakers,

12, for pivoted contact dial type switches with electromagnetic release, subclasses 402+ for double snap switches utilizing magnetic means to improve the snap action, subclass 83 for diaphragm type, fluid pressure actuated switches with a magnet.

218, High-Voltage Switches With Arc Preventing and Extinguishing Devices,

22+, for electromagnetic or permanent magnetic blow out means for extinguishing an arc.

246, Railway Switches and Signals, appropriate subclasses, especially

218+, for electrically actuated electromagnetic switch and signal devices peculiar to the railway art.

307, Electrical Transmission or Interconnection Systems,

112+, for switching systems in which the individual switches may be wholly or in part electromagnetically controlled.

310, Electrical Generator or Motor Structure, 10+, for dynamo-electric machine structure, particularly subclasses 31+ for reciprocating devices with self-actuated interrupter, and subclasses 40+ for rotary machines, which may include switching devices in the form of commutators.

318, Electricity: Motive Power Systems, appropriate subclasses for motor control systems which may include electromagnetic control switch means, see especially

445+,.

324, Electricity: Measuring and Testing,

415+, for contact, relay and switch testing.

340, Communications: Electrical, appropriate subclasses for electromagnetic switches utilized in electrical signaling or communication systems in general.

361, Electricity: Electrical Systems and Devices,

1+, for electromagnetic switches used in safety and protection systems, subclasses 139+ for control circuits for electromagnetic devices, and subclasses 247+ for igniting system using magnets or electromagnetic control means.