Electrical switching device

Details Electrical switching device Electrical switching device

1987-11-13

1989-04-25

Albritton, C. L.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Latching means

200440, 200521, H01H 900

Patent

active

048251828

ABSTRACT:
The switching device has a contact arm which is fixed on a shaft in the form of a thick-walled tube and is turnable between a closed position and an open position under the influence of a torsion rod spring. At one of its ends the spring is fixedly connected to the contact arm and at its other end to a percussion hammer. In the closed position the spring is arrested in tensioned condition by means of a latch. When releasing the latch for opening of the switching device, the spring energy is transformed to rotation energy in the hammer and is transferred to the shaft by impact against a projection on the shaft. In this way the contacts of the switching device immediately attain a great separation velocity.

REFERENCES:
patent: 3764766 (1973-10-01), Whitehead
patent: 4256941 (1979-03-01), Bachler

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