US PATENT SUBCLASS 191 / 58
.~.~.~ Tandem

Current as of: June, 1999
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191 /   HD   ELECTRICITY: TRANSMISSION TO VEHICLES

45 R  DF  COLLECTORS {8}
50  DF  .~ Trolley {10}
57  DF  .~.~ Multiple contact {1}
58.~.~.~ Tandem

DEFINITION

Classification: 191/58

(under subclass 57) Multiple contact trolley collectors wherein the contact elements are arranged to travel one in advance of the other on the same conductor.