US PATENT SUBCLASS 191 / 89
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Current as of: June, 1999
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191 /   HD   ELECTRICITY: TRANSMISSION TO VEHICLES

45 R  DF  COLLECTORS {8}
85  DF  .~ Trolley retrievers {4}
86  DF  .~.~ Erector release {2}
88  DF  .~.~.~ Spring erector {1}
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DEFINITION

Classification: 191/89

(under subclass 88) Trolley retrievers of the erector spring release type wherein the erecting spring is normally tensioned by a toggle, which toggle is broken when the trolley leaves the conductor, thus allowing the trolley to drop.