Condition responsive electrical switch construction and parts an

Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Expansible or vaporizable fluid-actuated

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Details

200 67D, H01H 2164

Patent

active

043630154

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.

REFERENCES:
patent: 3065323 (1962-11-01), Grimshaw
patent: 3096419 (1963-07-01), Howell
patent: 3548131 (1970-12-01), Piber
patent: 3609270 (1971-09-01), Jorgensen et al.
patent: 3656081 (1972-04-01), John
patent: 3735069 (1973-05-01), Andresen
patent: 3735080 (1973-05-01), Andresen
patent: 3819896 (1974-06-01), Aidn et al.
patent: 4027131 (1977-05-01), Aidn et al.
patent: 4045635 (1977-08-01), Purshani

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