Appliance programmer/timer with bi-directional drive

Details Appliance programmer/timer with bi-directional drive Appliance programmer/timer with bi-directional drive

1989-07-24

1990-12-25

Scott, J. R.

Electricity: circuit makers and breakers

Retarded

Clock train

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

Patent

active

049805231

ABSTRACT:
A programmer for an appliance having a single timing motor drive for a rotating cam drum which actuates plural appliance program function switches. An advance pawl drives the cam drum in one direction when selectively engaged with a toothed wheel on the drum and drives through a first rotary frictional coupling. A gear train drives continuously through a second rotary frictional coupling and drives the cam drum in a reverse direction when the advance pawl is disengaged. When the pawl is engaged, the second rotary frictional coupling slips and is overdriven in a direction opposite its driving direction by said first frictional coupling.

REFERENCES:
patent: 4366352 (1982-12-01), Obermann
patent: 4611103 (1986-09-01), Eder et al.
patent: 4796484 (1989-01-01), Eder
patent: 4856096 (1989-08-01), Mahon et al.

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