US PATENT SUBCLASS 315 / 143
.~.~ Convertible transformer connections

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

137  DF  POLYPHASE A.C. SUPPLY {4}
141  DF  .~ Transformer in the supply circuit {4}
143.~.~ Convertible transformer connections

DEFINITION

Classification: 315/143

(under subclass 141) Systems in which the transformer means is provided with a plurality of phase coils, and means are provided for connecting the phase coils in different manners with respect to each other.

(1) Note. One of the more common types of transformer means

included in this subclass is the type in which the primary or secondary phase coils may be connected either in star or delta.