Speed sensor device

Details Speed sensor device Speed sensor device

1982-04-12

1984-07-31

Krawczewicz, Stanley T.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

200 84C, 335205, G01P 348, G01P 354

Patent

active

044633122

ABSTRACT:
A speed sensor device incorporates a reed switch which is controlled by the changes in the density of the magnetic flux in response to the displacement of a permanent magnet. The device comprises at least one permanent magnet positioned on a rotational shaft, a reed switch opened and closed in response to the rotational displacement of the permanent magnet, an elastic member protecting the periphery of the reed switch, a body member being made of a material having excellent electric conduction and receiving the reed switch, a supporter being in a thin plate form and also being made of a material having excellent electric conduction, and a projection formed on the supporter serving to secure the supporter to the body member.

REFERENCES:
patent: 3359385 (1967-12-01), Bentz et al.
patent: 3421124 (1969-01-01), Kidd
patent: 3750124 (1973-07-01), Barnes et al.
patent: 3997744 (1976-12-01), Higo
patent: 4020481 (1977-04-01), Nakagawa
patent: 4210888 (1980-07-01), Holce
patent: 4266192 (1981-05-01), Ohtani

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