Torque limiting drive and programmer/timer employing same

Details Torque limiting drive and programmer/timer employing same Torque limiting drive and programmer/timer employing same

1994-05-16

1995-02-14

Pellinen, A. D.

Electricity: circuit makers and breakers

Retarded

Clock train

200 38A, 200 38C, H01H 708, H01H 4310

Patent

active

053897501

ABSTRACT:
A torque limiting drive and programmer/timer using same. A motor drives a driving member which has drive lugs engaging the central web of a plural-armed wave spring. The wave spring arms frictionally engaged radially oppositely facing annular friction surfaces on a driven member, which in a programmer/timer is the program cam, which upon rotation of the cam is operative for sequentially actuating electrical switches. User rotation of the cam when the motor is not operative allows the wave spring arms to slip against the annular friction surfaces permitting the user to position the cam as desired.

REFERENCES:
patent: 3214529 (1965-10-01), Druseikis et al.
patent: 4210824 (1980-07-01), Marquis et al.
patent: 4980523 (1990-12-01), Aigner et al.

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