US PATENT SUBCLASS 315 / 221
.~.~ Secondary conductively connected to the primary

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

209 R  DF  PERIODIC SWITCH IN THE SUPPLY CIRCUIT {11}
219  DF  .~ Periodic switch in the primary circuit of the supply transformer {4}
221.~.~ Secondary conductively connected to the primary

DEFINITION

Classification: 315/221

(under subclass 219) Systems having the primary circuit of the transformer connected to the secondary circuit by current

conductive means.

(1) Note. The current conductive means may be an inductance, a condenser, or a conductor.