Variable electromechanical device

Details Variable electromechanical device Variable electromechanical device

1979-11-16

1981-10-20

Shepperd, John W.

Electricity: circuit makers and breakers

Electric switch details

Actuators

338184, 338199, 338334, H01H 308, H01C 1000

Patent

active

042962927

ABSTRACT:
A variable electromechanical device, such as a rotary potentiometer, incls a housing with a sleeve having a bore through which an actuation shaft extends. The shaft is provided with an annular groove. A portion of the sleeve is displaced by stamping so that it extends into the annular groove of the shaft to prevent axial movement of the latter. A projection formed on the shaft within the annular groove cooperates with the displaced portion of the sleeve for limiting the rotation of the shaft. A lubricating and braking liquid of high viscosity is filled in the groove, and one or more passages are formed on the projection so that the liquid can pass from one side of the projection to the other side thereof when the shaft is rotated.

REFERENCES:
patent: 2231540 (1941-02-01), Lodge
patent: 2521561 (1950-09-01), Batcheller
patent: 2534356 (1950-12-01), Kramer
patent: 2981914 (1961-04-01), Young
patent: 3007127 (1961-10-01), Clayton
patent: 3129400 (1964-04-01), Hartman
patent: 3373257 (1968-03-01), Matthias et al.
patent: 3902152 (1975-08-01), Van Benthuysen

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