Brake device for motor in camera

Details Brake device for motor in camera Brake device for motor in camera

1992-03-24

1993-08-24

Perkey, W. B.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

354435, 3541731, 318634, 318639, 318365, G03B 100, G03B 1334, G03B 700, G05D 23275

Patent

active

052393313

ABSTRACT:
A device for braking an electric motor as the drive source of an operating mechanism in camera by means of an electrical circuit is disclosed. This circuit includes a detector for levels of the rotation speed of the motor or of factors of influencing the rotation speed sensed when the motor is supplied with current flowing in a direction to activate the operating mechanism, and control means responsive to the output of the detector for altering the time for which a current flow of reversed direction is supplied to brake the motor.

REFERENCES:
patent: 3500163 (1970-03-01), Moritz
patent: 3636426 (1972-01-01), Buiting
patent: 3895277 (1975-07-01), Klumpp
patent: 4184757 (1980-01-01), Kondo
patent: 4239354 (1980-12-01), Shenk
patent: 4322145 (1982-03-01), Yamada et al.
patent: 4431292 (1984-02-01), Takahashi
patent: 4474442 (1984-10-01), Shiozawa et al.
patent: 4482227 (1984-11-01), Shiozawa et al.
patent: 4508443 (1985-04-01), Matsuzaki et al.
patent: 4626753 (1986-12-01), Letterman
patent: 4649431 (1987-03-01), Terashi
patent: 4745425 (1988-05-01), Kusaka

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