Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1988-09-28
1989-10-31
Adams, Russell E.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
3541731, 3541951, 318685, G03B 300
Patent
active
048780774
ABSTRACT:
A motor drive and control apparatus for camera compares the speed of movement of a driven member, as detected by an encoder pulse, against a deceleration curve stored in a storage of CPU so as to turn the motor on and off or brake the motor in conformity to the deceleration curve. When the motor is on adjacent to a target position, the on condition of the motor is limited in synchronism with the encoder pulse.
REFERENCES:
patent: 3813592 (1974-05-01), Ryberg
patent: 4129813 (1978-12-01), Hunts et al.
patent: 4238143 (1980-12-01), Shenk
patent: 4254371 (1981-03-01), Scholten
patent: 4336987 (1982-06-01), Shenk
patent: 4354748 (1982-10-01), Grimes et al.
patent: 4427276 (1984-01-01), Feinerman et al.
Maeno Hitoshi
Maruyama Astushi
Miyazawa Azuma
Adams Russell E.
Olympus Optical Company Ltd.
Weinstein Louis
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