US PATENT SUBCLASS 191 / 88
.~.~.~ Spring erector

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.~.~.~ Spring erector {1}
89  DF  .~.~.~.~> Toggle

DEFINITION

Classification: 191/88

(under subclass 86) Trolley retrievers of the erector release type wherein the normally tensioned erecting spring is rendered ineffective by a shortening of its lever arm or is released when the trolley leaves the conductor, thus allowing the trolley to drop.