Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1981-01-08
1983-04-26
Shepperd, John W.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 47, 200153L, 200153T, 74568R, H01H 2182
Patent
active
043814379
ABSTRACT:
A rotary switch comprises a control shaft rotatable clockwise from a neutral position to a first switch actuating position and beyond it to an overtravel position, and counter-clockwise to a second switch actuating position and beyond it to another overtravel position; a centering arrangement for biasing the control shaft to its neutral position; first and second switch mechanisms; a housing enclosing the switch mechanisms; and a switch actuating arrangement. The latter arrangement includes a pair of cams mounted on the control shaft, a pivotally-mounted blade for actuating the first and second switch mechanisms, and first and second cam followers formed on the blade for slidably contacting respective ones of the cams. The cams are preferably formed as plate cams each having a cam finger that is bendable in the circumferential direction, in relation to the control shaft, to adjust the contact position thereof on the respective cam follower.
REFERENCES:
patent: 2822439 (1958-02-01), Schaefer et al.
patent: 2905777 (1959-09-01), Gayring
patent: 3106620 (1959-04-01), Haydon
patent: 3207860 (1965-09-01), Korsgren et al.
patent: 3267767 (1966-08-01), Neal
patent: 3688593 (1972-09-01), Ustin
Robinson, Jr. Lee C.
Shepperd John W.
Tri-tech, Inc.
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