Tripping device for thermal relays

Details Tripping device for thermal relays Tripping device for thermal relays

1982-08-20

1984-10-16

Phillips, Charles E.

Electricity: circuit makers and breakers

Suspended-wire controlled

200243, 200 67B, 200250, H01H 500, H01H 1518

Patent

active

044777035

ABSTRACT:
A device for tripping thermal relays includes a tilting fork controlled by a pusher which acts on a tension spring which connects a mid point of the fork to a fixed point of the casing of the device. The fork at its free movable end is joined to a contact-bearing sliding bar which is guided longitudinally and transversely. The bar is provided with dual breaker operating contacts which are continusouly biased by a spring to a closed position. The pressure exerted on the contacts is independent of the pressure exerted by the bar in its operative position or assembled with the contacts.

REFERENCES:
patent: 1635634 (1927-07-01), Pohl
patent: 2121433 (1938-06-01), Kettunen
patent: 2256732 (1941-09-01), Brown
patent: 2596893 (1952-05-01), Finizie
patent: 2776348 (1957-01-01), Korry
patent: 3290463 (1966-12-01), Johnson
patent: 3973094 (1976-08-01), Kuhn

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