Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – With arc-suppression or extinguishing means
Patent
1992-12-04
1994-03-01
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
With arc-suppression or extinguishing means
200144R, H01H 930
Patent
active
052911675
ABSTRACT:
The present invention provides an arc extinguishing device for disposition along a pre-determined path of movement between two electrical contacts in an electrical distribution device. The device includes a generally U-shaped member having a bight portion defined by a bottom wall with two upstanding side walls. The bight portion has sufficient width to allow the movement of the electrical contacts between the two side walls. A pair of magnetic poles having a magnetic field therebetween is formed with and located near the top edge of each side wall. The device includes means for focusing the magnetic field along the longitudinal center axis through the length of the U-shaped member and in the plane overlapping the path of movement of the electrical contacts so as to increase the magnetic flux density encountered by the electrical contacts.
The present invention also includes a method of assembling an arc extinguishing device which includes the step of interlocking a plurality of magnetic material plates into the shape of a yoke. The yoke having the shape of the device described above.
REFERENCES:
patent: 2429722 (1947-10-01), Jennings
patent: 2811607 (1957-10-01), Dorfman et al.
patent: 2898427 (1959-08-01), Nadeau
patent: 4616200 (1986-10-01), Fixemer et al.
patent: 4885441 (1989-12-01), Hisatsune et al.
Donovan Lincoln
Golden Larry I.
Irfan Kareem M.
Square D Company
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