Electricity: circuit makers and breakers – Special application – Liquid or moisture responsive
Patent
1975-03-17
1976-12-21
Smith, Jr., David
Electricity: circuit makers and breakers
Special application
Liquid or moisture responsive
200 6B, 200 67G, H01H 2140
Patent
active
039990249
ABSTRACT:
An electrical switch comprises at least one fixed contact which is engageable by a movable contact contained on a first arm portion of a movable contact member which also has a second arm portion which is disposed at an angle to the first arm portion. An actuating member is engageable with the movable contact member and is displaceable over the second arm portion to engage the first arm portion and to pivot it in a direction to move the movable contact to engage the fixed contact. First spring means bias the actuating member in a direction toward engagement with the movable contact member and during the movement of the movable contact member the second arm portion is moved in a direction opposite to the direction of the first arm portion to force the first spring means to increase the biasing force thereof. In the closed position of the contact the first spring means may in one embodiment be increased in biasing force and in another embodiment be maintained at the same biasing force as its initial position. A second spring means acts in a direction to return the actuating member to a non-actuated position.
REFERENCES:
patent: 2027538 (1936-01-01), Krieger
patent: 2469336 (1949-05-01), Kohl
patent: 2506196 (1950-05-01), Bourne
patent: 2795667 (1957-06-01), Schwerke
patent: 3646291 (1972-02-01), Bienwald
patent: 3735060 (1973-05-01), Kawai
patent: 3746359 (1973-07-01), Lewis
J. & J. Marquardt
Smith Jr. David
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