Limited-rotation motor with integral displacement transducer

Details Limited-rotation motor with integral displacement transducer Limited-rotation motor with integral displacement transducer

1978-05-17

1980-02-19

Duggan, Donovan F.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

With magneto-mechanical motive device

310 29, 310 36, 361292, H02K 3300

Patent

active

041896998

ABSTRACT:
The armature of a limited-rotation motor which rotates about an axis relative to a stator is extended axially beyond the stator between arcuate, non-magnetic capacitor plates disposed in a cylindrical array coaxial with the rotation axis. The capacitor plates are connected in a bridge circuit whose output is a selected function of armature displacement. The capacitor plates are installed at the end of the motor stator during assembly of the motor as tines of a unitary slotted bushing that is reamed simultaneously with the motor stator, following which the bushing is circumferentially cut to electrically isolate the bushing tines to form the individual plates.

REFERENCES:
patent: Re26749 (1970-01-01), Montagu
patent: 2426199 (1947-08-01), Gould
patent: 3337789 (1967-08-01), Ono et al.
patent: 3517282 (1970-06-01), Miller
patent: 3652955 (1972-03-01), Cruger
patent: 4110879 (1978-09-01), Rurke, Jr.

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