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US 4,226,128 AGranted
Friction device for use in car radios
AssigneeAutovox S.p.A.
InventorEzio F. Dellantonio
Life of this patent
Estimating the term…
Abstract
A friction device for coupling the manual tuning knob of a keyboard (pushbutton) radio to a reciprocal tuning slidebar is disclosed. The friction device comprises a cylindrical rod attached to the tuning slidebar which selectively is drivingly engaged by a peripheral V-shaped groove in a pulley rotated by the manual tuning knob.
Claims15
A friction device for use in car radios in which a frame carries a conventional tuning slider, a tuning knob and a keyboard of keys for the preselection of transmitter stations, wherein the improvement comprises:
- a reciprocable element secured to the tuning slider;
- and a rotatable element driven by the tuning knob, said elements being releasably urged against each other into frictional contact and their surfaces of mutual contact being shaped in such a manner that the surface of one element is wedged into the surface of the other element.
Dependencies are inferred from the claim text.