Instrument switch having integrated overcurrent protection

Details Instrument switch having integrated overcurrent protection Instrument switch having integrated overcurrent protection

1994-03-17

1996-02-13

Phillips, Michael W.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

335141, 200339, 337128, 337131, 337 53, 337 89, H01H 7116, H01H 6100, H01H 7118, H01H 300

Patent

active

054914604

ABSTRACT:
An electrical instrument switch includes a rocker switch for manual on-and-off switching and that is seated in an insulation housing. Depending on the pivot position, the rocker switch moves, with a working end that dips into the housing interior, a contact bridge between the closed position of its contact and the open position of its contact. The contact bridge is electrically connected in series with a contact spring that can be triggered thermally and hence acts as an overcurrent protection. The contact spring can move between its contact position and its open position. The contact spring is mechanically prestressed in the direction of its open position. When overcurrent occurs, it is transferred out of its contact position into its open position by a thermal triggering element. A pivot of the rocker switch counter to the mechanical prestress, in the tipping direction of the contact spring, guides the contact spring from its open position back into its contact position.

REFERENCES:
patent: 3133174 (1964-05-01), Creager
patent: 3340374 (1967-09-01), Shiraishi et al.
patent: 3431517 (1969-03-01), Ellenberger et al.
patent: 3544749 (1970-12-01), DeAngelo
patent: 3691499 (1972-09-01), Tyler
patent: 4528538 (1985-07-01), Andersen
patent: 4937548 (1990-06-01), Sdunek
patent: 5079530 (1992-01-01), Tsuchiyama
Konstruktionselemente der Feinmechanik; Hrsg. Werner Krause; 2., stark bearbeitete Auflage; 1993.

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