Single knob variable range timer

Details Single knob variable range timer Single knob variable range timer

1982-06-10

1983-10-18

Truhe, J. V.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

200 38B, 200 38E, 200 37A, 368107, H01H 1954, H01H 708

Patent

active

044107749

ABSTRACT:
A timer has a single knob which is normally used to set a desired timing cycle within a given range and also, when pulled out, to set a selected one of a plurality of ranges. When the knob is pulled out, projections formed on the control shaft engage a concentrically-mounted rotatable disc having at least one set of peripheral teeth. These teeth engage a flexible plastic detent formed in the front of the plastic housing of the timer. The rotatable disc is coupled to a reciprocating slider having conductive fingers which engage predetermined pairs of conductive contacts on a circuit board. As the disc rotates and the slider fingers touch different pairs of contacts, different circuit components are actuated thereby changing the range. In one variation of the timer, means are provided for changing the visible decimal point on the dial to correspond to the range selected.

REFERENCES:
patent: 2825772 (1958-03-01), Jones
patent: 3465269 (1967-09-01), Hendershot
patent: 3582582 (1971-01-01), Pauker et al.
patent: 4146758 (1979-03-01), Hiwatahi et al.

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