Contact assembly for a magnetic switch

Details Contact assembly for a magnetic switch Contact assembly for a magnetic switch

1995-05-25

1996-08-20

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Multiple contact type

335131, H01H 6702

Patent

active

055482600

ABSTRACT:
A plurality of square projections 26 are arranged in two mutually perpendicular directions at the pitch of P on to the surface of a plate member 27 between a first group of punched recesses 29a. The pitch P is twice the length of a side of each punched recess 29a. Shifted with respect to the first group of punched recesses 29a by P/2 in both the vertical and horizontal directions is a second group of punched recesses 29b. The punched recesses 29a and 29b define the projections 26 in the parts which are not occupied by these recesses generally in the pattern of a checker board. Because the projections 26 are separated from each other, and can effectively dissipate heat therefrom, the increase in the contact resistance due to heat generation can be prevented, and the efficiency of the starter motor can be increased.

REFERENCES:
patent: 3033959 (1962-05-01), Flanagan
patent: 3509620 (1970-05-01), Phillips
patent: 3670129 (1972-06-01), Cherry et al.
patent: 3950846 (1976-04-01), Johnson
patent: 4376559 (1983-03-01), Instone, Jr.
patent: 5424700 (1995-06-01), Santarelli

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