Title: Electrical switch construction

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Marquardt, Ewald (Rietheim, DT)

Application Number: 558860
Filing Date: 1975-03-17
Publication_date: 1976-12-21
Assignee: J. & J. Marquardt (Rietheim, DT)
Primary Class(es): 200/437 200/6B
Other Classes:
US Patent Ref:

2027538	Jan, 1936	Krieger	200/67.
2469336	May, 1949	Kohl	200/67.
2506196	May, 1950	Bourne	200/68.
2795667	Jun, 1957	Schwerke	200/67.
3646291	Feb, 1972	Bienwald	200/67.
3735060	May, 1973	Kawai	200/6.
3746359	Jul, 1973	Lewis	200/67.

Other Refs: 1,557,136593,175

Jan, 1969	FR
May, 1959	IT

Primary Examiner: Smith, Jr., David
Assistant Examiner:
Attorney: McGlew and Tuttle