Interchangeable lens unit for use in camera system

Details Interchangeable lens unit for use in camera system Interchangeable lens unit for use in camera system

1992-10-19

1995-10-31

Kincaid, Kristine L.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

3541951, 318611, 318630, 348345, G03B 300, G03B 1318

Patent

active

054634423

ABSTRACT:
An interchangeable lens unit for use in a camera system which is arranged to drive a motor in the interchangeable lens on the basis of a signal supplied from a camera body. The interchangeable lens unit is provided with a circuit for continuously transmitting a specific signal to the camera body for at least the time period required to absorb a backlash when the direction of running of the motor is reversed with respect to the preceding direction of running of the same.

REFERENCES:
patent: 4908647 (1990-03-01), Ueyama
patent: 4974003 (1990-11-01), Ohnuki et al.

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