Stepping motor for rotary device

Details Stepping motor for rotary device Stepping motor for rotary device

1979-07-12

1981-08-25

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

318115, 310191, 310209, H02K 3700

Patent

active

042861810

ABSTRACT:
A stepping motor mechanism for a rotary device in which one member is indexed linearly and/or rotationally relative to a second rotating member. The indexing member includes at least one portion with a series of equi-distantly spaced ridges and the rotating member includes at least three ferromagnetic members adapted to rotate with the rotating member and spaced from one another, each of the ferromagnetic portions having defined thereon ridges complementary to the ridges on the indexing member but angularly or linearly displaced from one another. A fixed coil and coil carrier is positioned spaced from but adjacent to the ferromagnetic members such that as current is applied to the coils, a magnetic field is induced in the coil carrier and adjacent rotating ferromagnetic member thereby causing the ridges on the adjacent ferromagnetic member to align with the ridges defined on the rotating member.

REFERENCES:
patent: 3869625 (1975-03-01), Sawyer
patent: 3881139 (1975-04-01), Inaba et al.
patent: 4027229 (1977-05-01), Frink
patent: 4110649 (1978-08-01), Mas
IBM Tech. Disclosure Bulletin, vol. 16, No. 2, 7/73, "Linear-Rotary Actuator and Transducer for Stick Printer", Meier.

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