(under subclass 88) Systems having an electric switch which is automatically operated in response to the failure of the first operated load device or electrode to complete the circuit to the second operated load device or electrode.
SEE OR SEARCH THIS CLASS, SUBCLASS:
65, for multiple filament load devices which are structurally combined with an automatically operated electric switch for substituting a second filament, for a first operated filament.
87, for this subject matter where the system also includes automatically operating means to substitute a second source of power supply for the first operated source of power supply.
92, for this subject matter where the substituted device is of a different type than the first operated device.
119, and indented subclasses for systems provided with an automatically operating electric switch for completing an electrical circuit in shunt about the load device, such switch means being automatically operated in response to some condition which prevents further normal operation of the load device. SEE OR SEARCH CLASS
200, Electricity: Circuit Makers and Breakers, appropriate subclasses for electric switches of general application.
314, Electric Lamp and Discharge Devices: Consumable Electrodes,
2, for consumable electrode discharge devices, and the systems therefor, provided with an automatically operating current shifting switch to substitute (1) another discharge device, or lamp for the first operated electrode discharge device or lamp if either the first operated or substituted device is a consumable electrode discharge device, or (2) another electrode for the first operated electrode of the consumable electrode device, the switch means being automatically operated in response to some condition which prevents further normal operation of the load device.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
2+, for electromagnetically operated switches of general ap-plication.
337, Electricity: Electrothermally or Thermally Actuated Switches,
