H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/283, 306/60
H01H 71/10 (2006.01) H01H 71/52 (2006.01) H01H 71/50 (2006.01)
Patent
CA 1225689
51,007 ABSTRACT OF THE DISCLOSURE A molded case circuit breaker includes a highly integrated operating mechanism having an over- center toggle mechanism for opening and closing a pair of electrical contacts and a trip mechanism for responding to overload and short circuit or fault current conditions to separate the pair of electrical contacts. A generally flat, intermediate latch plate includes an upper latch surface for latching with a movable cradle of the over-center toggle mechanism and a lower latch surface for latching with a trip bar of the trip mechanism and a pair of outwardly projecting pivot arms disposed between the upper and lower latch surfaces. The over-center toggle mechan- ism includes a pair of upper toggle links and a pair of lower toggle links interconnected by a toggle spring pin. To increase the speed of separation of the first and second electrical contacts during a trip operation, the cradle is physically configured to engage and upwardly propel the toggle spring pin and, also, the upper toggle links have projections for physically contacting a rigid stop.
469801
Flick Robert H.
Huffman Walter K.
Oldham And Company
Westinghouse Electric Corporation
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