Rotary electromagnetic indicator

Details Rotary electromagnetic indicator Rotary electromagnetic indicator

1975-06-05

1977-01-04

Caldwell, John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340379, 335268, G08B 500

Patent

active

040018156

ABSTRACT:
A rotary electromagnetic indicator having a stator with an annular arrangement of five equiangularly spaced radially inwardly extending salient poles, a winding on each stator pole and an indicating rotor having a permanent magnet with diametrically opposed north and south salient poles, each having an angular width equal to the included angle of a pair of adjacent salient poles of the stator.

REFERENCES:
patent: 3470509 (1969-09-01), Silverman et al.
patent: 3588888 (1971-06-01), Harden
patent: 3732561 (1973-05-01), McGinnis
patent: 3735303 (1973-05-01), Harden

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