Timer device

Details Timer device Timer device

1984-06-22

1985-11-05

Pellinen, A. D.

Electricity: circuit makers and breakers

Retarded

Chain or flexible drive

200 50C, 3071414, H01H 4300

Patent

active

045515883

ABSTRACT:
A timer device includes a housing for containing a timer circuit and a time unit setting switch to select one of plural time units in the timer circuit. At least two scale plates each have a through-hole for the insertion of a timer circuit knob, engaging projections provided on the edge of each plate, and an engagement releasing recess provided at an edge of each plate. Engaging recesses provided on the housing are engageable with the projections when a selected plate is attached to the housing, and an escaping recess provided on the housing and overlapping the releasing recess, when the plate is attached to the housing, enables access to be attained from outside to the underside of the plate through the recesses. A depression is formed on the plate into which a button of the time unit setting switch is insertable when the button is located at that position which sets in the timer circuit a time unit corresponding to the scale on the plate, and the plate is thus enabled to be attached to the housing. The switch then is also prevented from moving from its initial position. The switch button is blocked from insertion into the depression, so as to prevent the plate from being attached to the housing, when the time unit represented by the scale on the plate does not coincide with the time unit set by the switch in the timer circuit.

REFERENCES:
patent: 2028237 (1936-01-01), Och
patent: 4280063 (1981-07-01), Yokomori et al.
patent: 4463617 (1984-08-01), Thoma

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