Quick make and break switch
AssigneeLa Telemecanique Electrique
InventorHenri Pierrot
Life of this patent
Estimating the term…
Abstract
The invention relates to a quick make and break switch, particularly to measures which permit the positive opening of the normally closed contacts if the contacts in question are welded, and then to utilize the measures taken to make possible the opening of contacts even in the case where the elastic element necessary for rapid opening is fractured. According to the invention, this is achieved in that the rocking lever has a second arm whose second end arranged opposite the first end is located in the vicinity of the movable contact and is supported beneath the inverter member in the form of a rigid bracket if the latter has not switched under the action of the elastic blade at the time when alignment is performed and in that the lever pivot is located substantially equidistantly from the push-button of the second end.
Claims3
A quick make and break switch comprising, enclosed in a box:
- two fixed contacts and a movable contact;
- a fork-shaped support member having first and second branches located in a common plane and a lug connected to the said branches and forming a terminal for the movable contact;
- an inverter member carrying the movable contact and shaped as a comparatively rigid bracket having first and second ends and a longitudinal opening, said opening having first and second transverse edges, the first transverse edge being swivellingly supported at the end of said second branch remote from said lug;
- a rocking lever located in the said common plane, swivellingly supported on the end of the first branch remote from said lug and having on either side of the said first branch first and second arms respectively having first and second ends remote from the first branch;
- a push-button cooperating with the first end of the arms and placed above the first end of the inverter member whilst the second end of the arms is placed below the second end of the inverter member;
- a curved elastic blade having first and second ends respectively compressed between the first end of the arms and the second transverse edge of the opening, said elastic blade having a snap-on action on the inverter member for a predetermined position of the first end of said elastic blade, the second arm of the rocking lever being dimensioned and positioned, with respect to the inverter member end, for allowing mechanical engagement between the said second arm and the inverter member, after the first end of the elastic blade has passed beyond the said predetermined position.
Dependencies are inferred from the claim text.