Protective switch

Details Protective switch Protective switch

1993-05-24

1994-08-16

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Multiple contact type

335202, H01H 6702

Patent

active

053390601

ABSTRACT:
A protective switch device such as a relay switch includes at least one pole having at least one moving contact that cooperates with a stationary contact and a magnetic or thermal trip mechanism for assuring protection against overloads and excess currents and that acts on a control mechanism actuating the moving contact and that can be activated by a rotary control knob rotating about a pivot pin. Recocking of the control mechanism is possible from a "tripped" to an "off" or from a "tripped" to an "on" position. The control mechanism includes a lever for opening the contacts that pivots from an on position corresponding to the closing of the contacts to a position corresponding to the opening of the contacts. The opening lever is associated with a pivoting cocking mechanism, which is able to bring back and hold the opening lever in the on position. A trip mechanism is provided which is able to control the mechanical separation of the opening lever and the cocking mechanism so as to free the opening lever.

REFERENCES:
patent: 4356368 (1982-10-01), Osika
patent: 4926149 (1990-05-01), Saens et al.
patent: 5233321 (1993-08-01), Blanchard et al.
patent: 5241290 (1993-08-01), Sehmer et al.

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