Contact device for a switch

Details Contact device for a switch Contact device for a switch

1981-05-12

1982-12-07

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

200 67PK, 335 15, 335192, H01H 7500, H01H 7700, H01H 8300

Patent

active

043630103

ABSTRACT:
A contact lever has a contact point on one end for a fixed contact element and is supported on its other end on a pin which, when the switch is tripped, is capable of moving along a path transversely to the longitudinal direction of the contact lever. A compression spring acts upon the contact lever between a stop for the contact lever, which is embodied by a housing element and the pin in order to generate the contact pressure to move the pin upon the tripping of a switch. The stop has two protrusions, oriented towards the contact lever, one of which is located farther from the pin and closer to the contact lever than the other. The contact lever, therefore, upon being tripped, pivots first about the protrusion, which is more remote from the pin being moved, and then about the protrusion disposed closer to the pin. As a result, it is possible solely by means of the shaping of the stop to attain a high contact-breaking force at the first instant of the tripping, and to attain a long contact-opening path up until the termination of the pivoting movement of the contact lever.

REFERENCES:
patent: 4222019 (1980-09-01), Rusch

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