US PATENT SUBCLASS 191 / 93-- .~.~.~.~ Slack take-up

US PATENT SUBCLASS 191 / 93
.~.~.~.~ Slack take-up

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}
91	DF	.~.~ Spring-retracted {1}
92	DF	.~.~.~ Rope-actuated {1}
93		.~.~.~.~ Slack take-up

DEFINITION

Classification: 191/93

(under subclass 92) Trolley retrievers of the spring retracted rope actuated type wherein the trolley rope is kept taut, but allowed to follow the undulations of the conductor, and wherein the retracting spring motor is set in immediate operation by the sudden acceleration of the trolley rope upon the trolley leaving the wire.

(1) Note. This means automatically cuts short the upward spring of the trolley when it leaves the wire and rapidly draws it downward to a position below the conductor.