US PATENT SUBCLASS 361 / 253
.~ For electric spark ignition

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

247  DF  IGNITING SYSTEMS {3}
253.~ For electric spark ignition {7}
254  DF  .~.~> With electromagnet control means {1}
256  DF  .~.~> With capacitor discharging into sparking transformer
257  DF  .~.~> With capacitor discharge into spark gap
258  DF  .~.~> With electromechanical generator {2}
261  DF  .~.~> With mechanical arrangement for spark electrode make-break
262  DF  .~.~> With one spark electrode which is hand held
263  DF  .~.~> With spark coil or transformer

DEFINITION

Classification: 361/253

For electric spark ignition:

(under subclass 247) Subject matter wherein the energy for ignition is provided by a system which generates an electric spark.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices, appropriate subclasses for air gap discharge devices. See

118+, for spark plugs, per se, of the type used in internal combustion engines. See subclass 53 for flame type discharge devices in which conduction of electricity takes place through a flame.

315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for lamp and gas discharge device systems. Note, that some of these systems can be used to energize electric igniters.