Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1983-09-02
1985-10-08
Martin, John C.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335195, 335201, H01H 7710
Patent
active
045463360
ABSTRACT:
A residential or commercial circuit breaker of the narrow case type, typically having a width of 3/4 inch or 1 inch, is provided with a combination slot motor and arc chute 102 mounted within the case 2 and around the current carrying conductors 8 and 12. The combination slot motor and arc chute 102 concentrates the current-induced magnetic repulsive force between the conductors 8 and 12 to boost contact separation force, and also extinguishes the arc. The slot motor portion 106, 108 of the combination structure 102 continues to support the magnetic force which tends to force the arc into the arc chute portion 104 away from the contacts 10, 16 and operating mechanism. The combination slot motor and arc chute 102 is particularly simple and inexpensive, yet very effective within the size constraints of the narrow type breaker case 2.
REFERENCES:
patent: 2618716 (1952-11-01), Boller et al.
patent: 3081386 (1963-03-01), Koenig et al.
patent: 3185059 (1974-06-01), Spoelman
patent: 3488610 (1970-01-01), Powell
patent: 4056798 (1977-11-01), Malick
patent: 4077025 (1978-02-01), Slade et al.
patent: 4266210 (1981-05-01), Mrenna et al.
Hastings Jerome K.
Petrie Dennis J.
Andrews George
Eaton Corporation
Martin John C.
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