Electrical switch mechanism

Details Electrical switch mechanism Electrical switch mechanism

1982-12-29

1985-01-29

Goldberg, E. A.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

335224, 200153A, H01H 3502

Patent

active

044968086

ABSTRACT:
An electrical switch mechanism which operates in response to deceleration or acceleration for use on board trains for brake assurance purposes. High sensitivity to deceleration or acceleration with low hysteresis is obtained by actuating a switch, when a pendulum swings a predetermined distance, through a force transfer system providing a mechanical advantage enabling a pendulum of reasonable size and mass to actuate commercially available switches which require appreciable actuating force. The motion of the pendulum is damped by an eddy current damper having a plurality of magnets establishing a magnetic field which alternates in direction along the path traversed by a vane of conductive material carried by the pendulum to reduce overswing in response to acceleration or deceleration, to reduce pendulum response to high frequency components of the acceleration and deceleration and help in preventing transient motion of the pendulum which might arise from other than deceleration or acceleration events which are to be detected by the switch mechanism.

REFERENCES:
patent: Re16810 (1927-12-01), Thurston
patent: 1934526 (1933-11-01), Deuser
patent: 2152256 (1939-03-01), Hewitt
patent: 2203061 (1940-06-01), Schmettow
patent: 2650961 (1953-09-01), Weaver
patent: 2658120 (1953-11-01), Murphy
patent: 2816188 (1957-12-01), Stout
patent: 3493905 (1970-02-01), Foulke
patent: 3886339 (1975-05-01), Jubenville
patent: 3931911 (1976-01-01), Kohl
patent: 4295020 (1981-10-01), Heydweiller

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