Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1977-06-24
1979-01-30
Lipman, Steven E.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 67B, H01H 300, H01H 2104
Patent
active
041374398
ABSTRACT:
A rotary device acts as a switch and relay for manual or remote operation with the use of a rotary solenoid and a unique ratchet and automatic electrical contact opening and closing mechanism. The ratchet coacts with a spring loaded drive bar mounted perpendicular to a central axis of a rotary switch shaft. The drive bar is biased toward a ratchet face which carries a plurality of angularly arranged inclined surfaces. A detent wheel is fixed to the shaft with a pair of springs maintaining the detent wheel in a first position. A rotary solenoid is attached to the ratchet wheel and acts to drive the ratchet wheel to in turn cause rotation of the detent wheel and changing of switch positions.
An automatic electrical contact opening and closing mechanism used with the rotary selector switch relay device has a first spring urging a contact arm and contact into a first position with the contact in electrical engagement with a fixed contact. A second spring is mounted to assert a second spring force on the contact arm opposed to the urging of the first spring at a preselected time. The second spring force builds in magnitude upon pivoting of the cam track carried by a track arm to overcome the first spring force at a preselected time and cause snap disengagement of the contact and fixed contact.
REFERENCES:
patent: 1434972 (1922-11-01), Tizley
patent: 1969293 (1934-08-01), Bissell
patent: 2823278 (1958-02-01), Carlson et al.
patent: 4001740 (1977-01-01), MacLean
Electro Switch Corp.
Lipman Steven E.
Pollard Steven M.
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