Multiple coil electromagnetic pickup

Details Multiple coil electromagnetic pickup Multiple coil electromagnetic pickup

1979-07-18

1981-06-30

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310168, H02K 2138

Patent

active

042764890

ABSTRACT:
A multiple coil electromagnetic pickup converts into signals the flux varions produced by the passing of the teeth of a sound wheel. The pickup comprises at least two assemblies each consisting of at least one coil, one pole piece and one straight magnet all axially aligned, the assemblies being arranged in parallel to each other and magnetically insulated from each other by a screen. Measurement of rotational speed produces two output signals.

REFERENCES:
patent: 3252024 (1966-05-01), Loudon
patent: 3492518 (1970-01-01), Wayne
patent: 3961214 (1976-06-01), Lokhart
patent: 4011478 (1977-03-01), Reenstra

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