Electricity: circuit makers and breakers – Special application – Liquid or moisture responsive
Patent
1977-12-29
1980-03-18
Marcus, Stephen
Electricity: circuit makers and breakers
Special application
Liquid or moisture responsive
29622, 200 67PK, 200 83S, 200241, 200246, 200DIG42, 337318, 337321, H01H 518, H01H 3738, H01H 3740, H01H 3760
Patent
active
041941020
ABSTRACT:
A condition responsive electrical switch construction having a frame carrying an electrical switch and a condition responsive device having a movable wall for causing movement of a lever that is pivotally carried by the frame and is operatively associated with the switch to operate the same as the lever is moved by the wall to a certain position in opposition to the force of a range spring also carried by the frame. A cradle-like member has a base operatively associated with the range spring so as to be held thereby against the wall to be moved in unison with the wall and has arms engaging the lever to cause the lever to move in relation to movement of the wall. The switch has a pair of movable contact members disposed on opposite sides of a fixed contact member and each is biased in a direction to tend to place the same in contact with the fixed contact member and each having an offset loop therein. An actuator member controlled by the lever is disposed between the pair of movable contact members and is movable in opposite directions to move the respective movable contact member out of contact with the fixed contact member.
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patent: 4027131 (1977-05-01), Aidn et al.
patent: 4045635 (1977-08-01), Pursnani
"Narrow Differential Cold Controls (RC Series)", Robertshaw Controls Co., May, 1975.
Branson Charles D.
Shopsky Harvey J.
Marcus Stephen
Robertshaw Controls Company
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