Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1993-04-28
1994-11-08
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335147, 200147R, H01H 7500
Patent
active
053630769
ABSTRACT:
A blade suspension assembly for a circuit breaker includes a first electrical contact, an elongated contact arm having a second electrical contact adjacent a first end of the contact arm, a compression spring, and an elongated lever. The second electrical contact is movable about a first pivot axis between a contacts-closed position and at least one contacts-open position with respect to the first electrical contact. The lever has a first end adjacent a second pivot axis, a second end supported by the compression spring, and a contoured support surface between the first and second ends which supports a second end of the contact arm. The compression spring exerts a force against the second end of the lever so that the contoured support surface biases the second end of the contact arm about the first pivot axis in the contacts-closed position during normal operation and in the contacts-open position in response to the contact arm moving to the contacts-open position.
REFERENCES:
patent: 4540961 (1985-09-01), Maier
patent: 4635011 (1987-01-01), Leone et al.
patent: 4841266 (1989-06-01), Wulff
patent: 4845459 (1989-07-01), Manthe et al.
Hood Teresa I.
Miller Joel L.
Winter John M.
Donovan Lincoln
Golden Larry I.
Irfan Kareem M.
Square D Company
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