Appliance timer

Details Appliance timer Appliance timer

1987-12-17

1989-06-20

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

200 38B, 200246, 200262, 338202, 338330, G04F 800, H01H 4310

Patent

active

048414964

ABSTRACT:
An appliance timer includes a motor driven cam carried in a housing. A switch blade carried in the housing is responsive to the cam to selectively activate one of a pair of switch circuits, each of which provide a different operating level for an appliance function, e.g. several different heat levels in an automatic dryer. Each switch circuit includes a contact, a contact support spring, and an electrical feed-through which connects to a terminal strap on the exterior of the housing. A resistor that is an integral part of one of the switch circuits provides the level differentiation between the circuits. In one embodiment a carbonaceous organic resistor chip replaces the circuit contact. In another embodiment an inorganic ceramic resistor slug replaces the circuit feed-through.

REFERENCES:
patent: 3918020 (1975-11-01), Durocher
patent: 3938070 (1976-02-01), Koerner et al.
patent: 4079269 (1978-03-01), Numata et al.
patent: 4180715 (1979-12-01), Lichtenberger
patent: 4355217 (1982-10-01), Cushing
patent: 4575594 (1986-03-01), Amonett
patent: 4734548 (1988-03-01), Cole

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