H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/191
H01H 35/00 (2006.01) H01H 35/26 (2006.01) H01H 35/32 (2006.01)
Patent
CA 1194909
CONDITION RESPONSIVE ELECTRIC SWITCH SYSTEM, ELECTRICAL SWITCHING DEVICE AND METHOD OF OPERATION THEREOF ABSTRACT OF THE DISCLOSURE A condition responsive electric switch system comprises switch means which includes at least one set of contact elements defining a preselected open position, a preselected closed position, and a preselected initial contact make-break position, disposed between the open and closed positions. Switch actuating means is movable in actuating relation with the switch means for operating the contact elements selectively into and out of the three preselected positions. Spring means and tempera- ture responsive means are connected to an impart motion to switch actuating means, with the spring means and tem- perature responsive means creating opposing forces on the switch actuating means. The condition responsive electric switch system has both positive and negative spring gradients including a force producing means having maximum absolute positive gradient forces F1 and F2 in which F1 = maximum absolute positive gradient pre-load force on the contact elements at the preselected initial contact make-break position; F2 = maximum absolute positive gradient force on the contact elements at the preselected closed position wherein the value of the expression Image should not be substantially less than unity. A net contact elements force is also produced generally in the vicinity of zero as the contact elements pass at least through the preselected initial contact make-break position. The system further includes means for adjusting the larger negative spring gradients in the system. An electric switch device and a method of operating the switch device are also disclosed.
429668
Kelly Ronald W.
Thompson Paige W.
Company General Electric
Eckersley Raymond A.
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