Rim Blow $37. A rubber pad encasing wires was mounted around the entire inner surface of the steering wheel rim. Rather than pressing a suspended horn ring, a center horn pad, or switches on the spokes, to make the electrical contact, the inside of the rim could be pressed anywhere on its circumference. Applying pressure to soft rubber inner rim of the steering wheel, a driver could activate the car's horn without moving their hands from the wheel rims. Technical issues, such as hardening (difficult to activate) and shrinking (causing the horn to sound without activation) of the rubber, and a lack
Idler-wheel Idler-wheel An idler-wheel is wheel which serves only to transmit rotation from one shaft to another, in applications where it is undesirable to connect them directly. For example, connecting a motor to the platter of a phonograph, or the crankshaft-to-camshaft gear train of an automobile. Because it does no work itself, it is called an "idler". An idler-wheel may be used as part of a friction drive mechanism. For example, to connect a metal motor shaft to a metal platter without gear noise, early phonographs used a rubber idler wheel. Likewise, the pinch roller in a magnetic tape transport is