Chicago Telephone Supply Co. v. Stackpole Carbon Co.

CLARK, Circuit Judge.

The art is a small corner of the vast radio structure. All of us are familiar with the “click” when we turn on our radios. That click reflects the closing of a power switch. We also recall that to increase (or in reverse decrease) the volume of sound we turn the knob further. That further turning 'lowers the resistance and so raises the sound. It is desirable to prevent electrical interference as between the switch mechanism and the resistance circuit (rheostat). Two electrical engineers pose the problem thus: “If a charged object (that is, an object with a voltage…