Stepping motor-driven sector opening/closing device

Details Stepping motor-driven sector opening/closing device Stepping motor-driven sector opening/closing device

1985-02-27

1988-11-01

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

354439, 310 49R, 310112, 310156, G03B 908

Patent

active

047823534

ABSTRACT:
In a program shutter using a stepping motor for opening and closing sectors, the stepping motor is composed of a 4-pole magnetized rotor and two sets of U-shaped stators and coils, the stators being each provided with a pair of leg portions which are formed with magnetic poles at end portions thereof in an opposed relation to the outer periphery of the rotor, the magnetic poles at the leg end portions of each stator being formed in a phase relation of 90.degree. with respect to the rotational center of the rotor, and one magnetic poles of the stators being disposed in proximity to each other so as to in a phase relation of 45.degree. with respect to the rotational center of the rotor.

REFERENCES:
patent: 1185337 (1916-05-01), McCartney
patent: 2970529 (1961-02-01), Nieuwenhoven
patent: 3698300 (1972-10-01), Kobori
patent: 3969642 (1976-07-01), Yoshino
patent: 4009866 (1977-03-01), Iwata
patent: 4016574 (1977-04-01), Iwata
patent: 4057810 (1977-11-01), Iwata
patent: 4079390 (1979-03-01), Iwata
patent: 4144467 (1979-03-01), Kakajima
patent: 4218121 (1980-08-01), Nakagawa
patent: 4267472 (1981-05-01), Sudler
patent: 4371821 (1983-02-01), Laesser
patent: 4491751 (1985-01-01), Kuznetsova et al.
patent: 4518884 (1985-05-01), Chatelain

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