Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1976-09-21
1978-02-28
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335195, H01H 7510, H01H 7702
Patent
active
040770257
ABSTRACT:
A circuit interrupter having a fixed elongated contact arm, with a fixed contact disposed at the end thereof, and an elongated movable contact arm, with a movable contact disposed at the end thereof, and a magnetic driving device for rapidly separating the contacts. The magnetic driving device is formed of a ferromagnetic material and has a slot formed therein which is magnetically open on one end. The fixed contact arm is partially disposed in the slot near the closed end and the movable contact arm is partially disposed within the slot towards the open end. The magnetic drive or slot motor rapidly separates the contacts upon a predetermined overload. Divergent arc rails lying in the same general plane extend from the fixed contact and the movable contact. A magnetic arc gun or yoke having an opening therethrough disposed around the movable contact, the stationary contact and a portion of the arc rails when used concentrates the arc and provides for rapid arc movement by concentrating the magnetic forces generated by current flow which acts upon the arc.
REFERENCES:
patent: 3263042 (1966-07-01), Dyer et al.
patent: 3663905 (1972-05-01), Kussy et al.
patent: 3824508 (1974-07-01), Terracol
patent: 3887888 (1975-06-01), Bayles et al.
Slade Paul G.
Wafer John A.
Converse, Jr. Robert E.
Harris George
Westinghouse Electric Corporation
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