US PATENT SUBCLASS 191 / 60.1
.~.~.~.~ Center bias

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

45 R  DF  COLLECTORS {8}
50  DF  .~ Trolley {10}
59  DF  .~.~ Heads {9}
60  DF  .~.~.~ Swivel {1}
60.1.~.~.~.~ Center bias

DEFINITION

Classification: 191/60.1

(under subclass 60) Gravity, spring, or electric devices constantly tending to maintain the swiveled heads in normal or central position and to restore them to such position if swung to either side.

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60.2,