US PATENT SUBCLASS 218 / 1
ARC PREVENTING OR EXTINGUISHING DEVICES

Current as of: June, 1999
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218 /   HD   HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES

1ARC PREVENTING OR EXTINGUISHING DEVICES {14}
2  DF  .~> Multiple break {5}
8  DF  .~> Auxiliary shunt {8}
22  DF  .~> Magnetic blowout {7}
43  DF  .~> Air-current blowout {18}
89  DF  .~> Interposed non-conductor {3}
118  DF  .~> Vacuum {5}
143  DF  .~> Resistance inserting {1}
145  DF  .~> With capacitor
146  DF  .~> Contact structure {1}
148  DF  .~> Arc runner (e.g., arc horn)
149  DF  .~> Arc chute assembly {2}
152  DF  .~> Polyphase {1}
154  DF  .~> Operating mechanism structure or arrangement
155  DF  .~> Housing structure {1}

DEFINITION

Classification: 218/1

Arc preventing or extinguishing devices:

(under the class definition) Subject matter of Class 200 comprising a main contact assembly having a movable and stationary contact and means for preventing the formation of electric arcs when the circuit is made or broken, or extinguishing or smothering the arc if it forms.

(1) Note. This class has been created from former subclasses 144 through 151 in Class 200, Electricity: Circuit Makers and Breakers, and is to be considered an integral part of that class. See the subclass schedule of Class 200 for the hierarchical position of this subject matter relative to other subclasses in that class.

(2) Note. Arc preventing by special operation of the contacts as a snap or quick movement is not included. See the search notes below.

(3) Note. The medium in which circuit interruption is performed may be designated by a suitable prefix, for example, vacuum circuit breaker, air-current blowout circuit breaker, magnetic blowout circuit breaker, interposed non-conductor circuit breaker, etc.

(4) Note. The terms "circuit breaker", "circuit interrupter", or "switch" are synonymous in this class.

(5) Note. Electrical systems or circuits which include arc interrupting switches, comprising the subject matter of this class, are excluded from this class. These systems or circuits are classified in the various electrical or art classes depending upon the type of system or apparatus controlled. Furthermore, multiple circuit control type of circuit breakers are excluded from this class, and classified in Class 200.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, 1+, for multiple circuit breaker control, subclasses 48+ for high potential type manually operated disconnect switch, subclasses 82+ for fluid pressure piston operated means, subclasses 237 through 292 for switch contact details,

subclasses 293 through 307 for housing features; subclass 308 for indicator features; subclasses 402+ for arc preventing by special operation of the contacts as a snap or quick movement.

313, Electric Lamp and Discharge Devices,

238+, for support and spacing structure for electrode and shield, and subclasses 567 through 643 for detail of gas or vapor type discharge devices.

324, Electricity: Measuring and Testing,

415, 424 for testing electromechanical switching devices, and subclasses 500+ for fault detecting in electric circuits and of electric components.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

2+, for electromagnetically actuated switches.

337, Electricity: Electrothermally or Thermally Actuated Switches,

14+, for electrothermally actuated switches.

338, Electrical Resistors,

20, 21, 22, and 68+ for mechanically variable resistors. 361, Electricity: Electrical Systems and Devices,

1, 138 for safety and protection of systems and devices with arc suppression at switching point, and miscellaneous structual details of housing or mounting assemblies with diverse electrical components.

439, Electrical Connectors,

183, 187 for arc suppressing or extinguishing environment for electrical connectors.