US PATENT SUBCLASS 313 / 130
.~ Non-conducting material in or adjacent gap (e.g., restricts spark)


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

118  DF  SPARK PLUGS {22}
130.~ Non-conducting material in or adjacent gap (e.g., restricts spark) {1}
131 R  DF  .~.~> Non-shortest line spark and surface spark type {1}


DEFINITION

Classification: 313/130

(under subclass 118) Subject matter having nonconducting material interposed between or closely adjacent the ignition spark gap.

(1) Note. The nonconducting material, for example, may be provided with a minute aperture through which the spark must pass, or it may be an impervious barrier between the electrodes.

(2) Note. For the purpose of this definition, the material is closely adjacent the spark gap if it is so close that it affects the sparking.

SEE OR SEARCH THIS CLASS, SUBCLASS:

143, for spark plugs having an insulator end at the ignition spark gap end of the plug of particular shape.

325, for miscellaneous spark gaps having an insulator material within or closely adjacent to the spark electrodes. SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

46, for similar subject matter where the material with or closely adjacent the gap is a resistance material.