Rotation sensor switch

Details Rotation sensor switch Rotation sensor switch

1977-04-04

1978-06-06

Harris, George

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6146, 335205, H01H 3502

Patent

active

040938352

ABSTRACT:
A protective device to provide a warning if a piece of rotating machinery slows or stops comprises a pair of hinged weights disposed to rotate on a rotating shaft of the equipment. When the equipment is rotating, the weights remain in a plane essentially perpendicular to the shaft and constitute part of an electrical circuit that is open. When the shaft slows or stops, the weights are attracted to a pair of concentric electrically conducting disks disposed in a plane perpendicular to the shaft and parallel to the plane of the weights when rotating. A disk magnet attracts the weights to the electrically conducting plates and maintains the electrical contact at the plates to complete an electrical circuit that can then provide an alarm signal.

REFERENCES:
patent: 2802204 (1957-08-01), Kennelly et al.
patent: 3813505 (1974-05-01), Shoji
patent: 4028516 (1977-06-01), Hirashima et al.

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