Spring-drive mechanism for electric switches

Details Spring-drive mechanism for electric switches Spring-drive mechanism for electric switches

1977-06-30

1978-10-10

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Time delay

74 2, 185 40R, H01H 330

Patent

active

041198204

ABSTRACT:
A spring-drive mechanism for controlling the switch-on and switch-off positions of contacts of an electric switch wherein the conventional lever system for relaying the rotating force from the helical spring to the contacts is replaced by a structure which includes a fixed hollow cylinder in which a movable coupling shaft is located, the hollow cylinder having axially staggered wall bores in which balls are positioned, the configuration and positioning of the coupling shaft within the hollow cylinder determining whether one or the other of the balls is positioned to extend outwardly of the outer surface of the cylinder. The hollow cylinder is positioned with one end of a hollow shaft which coaxially encompasses a drive shaft and helical spring combination, the structure including interconnecting projections to provide for selective rotational interengagements between the hollow shaft and the drive shaft.

REFERENCES:
patent: 895308 (1908-08-01), Schaar
patent: 2481190 (1949-09-01), Binns
patent: 3255636 (1966-06-01), Wehrli
patent: 3563098 (1971-02-01), Gley
patent: 3845433 (1974-10-01), Kravltis

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