US PATENT SUBCLASS 335 / 6
.~ Automatic circuit-interrupting devices (e.g., circuit-protective devices)

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

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
6.~ Automatic circuit-interrupting devices (e.g., circuit-protective devices) {12}
7  DF  .~.~> Responsive to plural diverse circuit conditions (e.g., voltage and current)
8  DF  .~.~> Multipole or polyphase {2}
11  DF  .~.~> Plural switches
12  DF  .~.~> With shunting contacts
13  DF  .~.~> With auxiliary switch means (e.g., for energizing coil)
14  DF  .~.~> With direct connected contact separating means
15  DF  .~.~> With contact biasing, holding or pressure control means {1}
17  DF  .~.~> With switch condition signalling, indicating or alarm means
18  DF  .~.~> Responsive to predetermined or abnormal current condition (e.g., direction, phase angle or amplitude) {1}
20  DF  .~.~> Voltage responsive (under, over or no voltage)
21  DF  .~.~> With latch or trip means {6}
46  DF  .~.~> With contact rebound or other undesirable motion prevention means

DEFINITION

Classification: 335/6

(under subclass 2) Subject matter wherein the device comprises means whereby normally closed contacts are automatically interrupted upon the occurrence of an abnormal circuit condition in a circuit with which the device is designed to be used. The circuit interrupting device may be, by way of example, of any one of the types known as "air circuit breakers" or "oil circuit breakers", which circuit breakers may be of the "single-throw", "double-throw" or "multiple circuit breaker" type; provided, that at least one electromagnet is utilized as a means for operating the contacts to an open position upon the occurrence of an abnormal condition.

SEE OR SEARCH CLASS

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

1+, and 22+, for circuit interrupting devices with nonmagnetic control means combined with magnetic blow out.

307, Electrical Transmission or Interconnection Systems, particularly

39, 86, 97, 116+, and 328 for condition responsive switching systems.

320, Electricity: Battery or Capacitor Charging or Discharging, appropriate subclass for a circuit making or breaking device responsive to a predetermined condition in a battery charging or discharging circuit or a battery itself. 337, Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses for similar devices electrothermally or thermally controlled.

361, Electricity: Electrical Systems and Devices,

1+, for devices similar to those to be found in Class 335 utilized in circuit safety or protective systems, particularly subclasses 91.1+ and 93.1+ which includes specific circuit breaker or relay structure.