US PATENT SUBCLASS 315 / 99
.~.~ Series connected cathodes or heaters

Current as of: June, 1999
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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

94  DF  WITH CATHODE OR CATHODE HEATER SUPPLY CIRCUIT {6}
98  DF  .~ Plural cathodes or heaters in the load device {1}
99.~.~ Series connected cathodes or heaters {1}
100  DF  .~.~.~> Thermostatic switch in the series circuit

DEFINITION

Classification: 315/99

(under subclass 98) Systems wherein a plurality of the cathodes and/or cathode heaters are connected in electrical series relation with respect to each other and the source of cathode or heater current supply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

96, for systems under subclass 94 having a plurality of load devices connected in the system, the cathodes and/or heaters of two or more of the load devices being connected in electrical series relation with respect to each other.