Film mid roll interrupt protection for a camera using magnetic a

Details Film mid roll interrupt protection for a camera using magnetic a Film mid roll interrupt protection for a camera using magnetic a

1989-10-05

1991-05-21

Mathews, A. A.

354 76, 354106, G03B 1724

Patent

active

050173260

ABSTRACT:
Data is recorded on the film by the manufacturer prior to exposure at a first magnetic head azimuth angle. The camera magnetically records information on the film frame-by-frame at a second head azimuth angle with each exposure or shortly thereafter. Before exposure of any frame, the camera determines whether the frame has already been exposed by sensing the recorded signal amplitude at one of the two magnetic head azimuth angles. In order to prevent a double exposure, the camera transports the film past any frame having data magnetically recorded therein corresponding to the second azimuth angle.

REFERENCES:
patent: 4270854 (1981-06-01), Stemme et al.
patent: 4864332 (1989-09-01), Harvey
patent: 4878075 (1989-10-01), Cannon
patent: 4905029 (1990-02-01), Kelly

Affiliated with

Also associated with

Rating

Film mid roll interrupt protection for a camera using magnetic a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Film mid roll interrupt protection for a camera using magnetic a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Film mid roll interrupt protection for a camera using magnetic a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-236432