H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 1/12 (2006.01) H01H 71/50 (2006.01) H01H 77/10 (2006.01)
Patent
CA 2125245
ABSTRACT OF THE DISCLOSURE The movable contact arm 17 of a circuit bleaker 1 is mounted on a pivot pin 2 by a slot 29 which extends generally transverse to the longitudinal arm 19 of the contact arm, so that when the contacts 9 are welded, initial motion of the circuit breaker operating mechanism 43 to open the contacts 9 is translated into pivoting of the contact arm 17 about, and thereby beaking the weld. In a circuit breaker 1 in which the contact arm 17 is coupled to the operating mechanism 43 through a cam mechanism 75-85 which allows the contact arm 17 to blow open in response to very high overcurrents, the slot 29 extends generally longitudinally so that the cam mechanism 75-85 translates initial movement of the operating mechanism 43 into longitudinal movement of the contact arm 17 to apply a shear force tending to break the weld.
Eberts William G.
Turner David C.
Bereskin & Parr
Corporation Eaton
LandOfFree
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