US PATENT SUBCLASS 315 / 64
.~ Multiple filament load devices

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

32  DF  COMBINED LOAD DEVICE OR LOAD DEVICE TEMPERATURE MODIFYING MEANS AND ELECTRICAL CIRCUIT DEVICE STRUCTURE {19}
64.~ Multiple filament load devices {5}
65  DF  .~.~> Automatic substitution of the filament
66  DF  .~.~> Series connected filaments
67  DF  .~.~> Diverse resistance filaments
68  DF  .~.~> Three or more controlled filament circuits
69  DF  .~.~> Plural filaments energized in parallel

DEFINITION

Classification: 315/64

(under subclass 32) Subject matter, wherein the load device is provided with a plurality of filaments.

(1) Note. Where a multiple filament load device system within the class definition is claimed, but no circuit element is combined with the load device structure, the patent is classified as a plural load device system in one of

the other appropriate subclasses of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35, for multiple unit discharge devices having combined therewith a circuit element.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, 51.03, and indented subclass and 51.05 and indented subclass, for electric connectors, such as plugs, sockets, etc., combined with either single or plural switch means in a unitary structure or which are capable of functioning as a switch and which may be operated so as to open or close a selected part only of a plurality of circuits under control of the switch means.

313, Electric Lamp and Discharge Devices,

310, and subclasses specified in the Notes thereto for discharge devices which are provided with a plurality of filaments (e.g., filamentary cathodes or filamentary cathode heaters), and subclass 316 and the subclasses specified in the Notes thereto for multiple filament incandescent lamps.