Double-pole single-throw switch

Details Double-pole single-throw switch Double-pole single-throw switch

1977-11-23

1979-07-31

Price, William

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 67G, H01H 300, H01H 2104

Patent

active

041631323

ABSTRACT:
A double-pole, single-throw electrical switch having a momentary make between a first set of contacts and a momentary break between a second set of contacts upon actuation thereof. The construction includes a box-like housing having first and second sets of normally closed contacts disposed therein, the contacts being arranged to cooperate with first and second rocker plates which are pivotally mounted within the housing. A latching mechanism and a return spring are operatively coupled to these rocker plates such that when a switch lever mounted on the housing is moved from a first to a second position, one of the rocker plates is rotated about the pivot from a first orientation to a second orientation, at which point the latch releases, and the return spring moves the rocker plate to its first orientation. During the travel of the rocker plate, the first set of contacts is electrically closed, but upon its return to the first orientation, the first set of contacts re-open. When the switch lever is subsequently thrown from its second position to its first position, the second rocker plate moves from a first to a second orientation, and upon reaching the second orientation, its latch releases, thus allowing its return spring to move the second rocker plate back to its first orientation. The second rocker plate is designed such that when it is in its first orientation, its associated set of contacts are closed, but are opened during its travel from the first orientation to the second orientation and back to its first orientation. In an alternative embodiment, the second rocker plate is modified such that the second set of contacts remain electrically closed except when the second rocker plate is in its first orientation.

REFERENCES:
patent: 2254347 (1941-09-01), Blakesley
patent: 2647177 (1953-07-01), Huck
patent: 2899513 (1959-08-01), Schmidt
patent: 2936347 (1960-05-01), Larkin
patent: 3082309 (1963-03-01), Carissimi
patent: 3337703 (1967-08-01), Yamada
patent: 3361888 (1968-01-01), Brackett
patent: 3439138 (1969-04-01), Braun
patent: 4022999 (1977-05-01), Brown
patent: 4037068 (1977-07-01), Gaynor

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