Rotational line switch control

Details Rotational line switch control Rotational line switch control

1977-05-16

1979-04-10

Scott, James R.

Electricity: circuit makers and breakers

Retarded

Clock train

74504, 200 38C, 200 38E, H01H 4300, G05G 108

Patent

active

041490460

ABSTRACT:
A control mechanism for a sequential timer is disclosed. The mechanism includes an axially movable timer shaft which is associated with a timer shaft extension or control knob in such a way that initial movement of the control knob to select a particular position on the timing cycle will axially move the timer shaft to open a circuit in the timer. The open circuit prevents arcing of switch contacts and short pulsing of current through solenoids and motors.

REFERENCES:
patent: 2665904 (1954-01-01), Lehmann
patent: 2703347 (1955-03-01), Constantine
patent: 2889419 (1959-06-01), Miller et al.
patent: 3033054 (1962-05-01), Woolley
patent: 3159255 (1964-12-01), Woolley
patent: 3190418 (1965-06-01), Woolley
patent: 3227826 (1966-01-01), Beare
patent: 3388602 (1968-06-01), Shopsky
patent: 3603749 (1971-09-01), Davis
patent: 3866002 (1975-02-01), Underwood et al.

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