Protective device for automatic focusing camera

Details Protective device for automatic focusing camera Protective device for automatic focusing camera

1982-11-16

1984-10-16

Adams, Russell E.

354406, G03B 300

Patent

active

044771673

ABSTRACT:
An automatic focusing camera which can drive an objective lens to a focus position includes a sensor arrangement that is capable of determining when the focusing lens is physically held or is being driven beyond its operative range. The direction of movement can be stored in memory when the motor is de-energized and a comparison can be made with a new focusing signal on a different object to reactivate the focusing system. Additionally, any friction binding of the gear train can be automatically released by a reverse driving of the motor upon determining of a jam condition.

REFERENCES:
patent: 4160590 (1979-07-01), Reynard
patent: 4178087 (1979-12-01), Shenk et al.
patent: 4182563 (1980-01-01), Biber et al.
patent: 4199244 (1980-04-01), Shenk
patent: 4200378 (1980-04-01), Shenk
patent: 4238143 (1980-12-01), Shenk
patent: 4239354 (1980-12-01), Shenk
patent: 4294531 (1981-10-01), Shenk
patent: 4309098 (1982-01-01), Shenk
patent: 4348089 (1982-09-01), Shenk

Affiliated with

Also associated with

Rating

Protective device for automatic focusing camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Protective device for automatic focusing camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protective device for automatic focusing camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1943598