Timer having a variable operation period

Details Timer having a variable operation period Timer having a variable operation period

1974-04-16

1976-02-10

Scott, James R.

Electricity: circuit makers and breakers

Retarded

Clock train

200 38R, 58 9, 58 225, H01H 708

Patent

active

039379108

ABSTRACT:
A timer operative by means of a clock mechanism and having a variable operation period, wherein a main cam plate and a subsidiary cam plate are mounted coaxially on a common shaft so that they are rotatable relative to each other, each of said main and subsidiary cam plates having recessed peripheral portions and protruded peripheral portions. A single operation lever pressingly bears against the peripheral portions of said main and subsidiary cam plates so that, when the recessed peripheral portions of said main and subsidiary cam plates are brought into alignment with each other, the operation lever can drop into said aligned recessed peripheral portions.

REFERENCES:
patent: 2354368 (1944-07-01), Gallagher
patent: 2545719 (1951-03-01), Wedeberg
patent: 2802913 (1957-08-01), Weiss
patent: 3214985 (1965-11-01), Danek et al.
patent: 3264818 (1966-08-01), Morrison et al.
patent: 3456123 (1969-07-01), Pihl
patent: 3625000 (1971-12-01), Hermle
patent: 3818157 (1974-06-01), Voland et al.
patent: 3825702 (1974-07-01), Murata et al.

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