1976-08-23
1977-08-30
Hix, L. T.
354 38, 354 51, 354273, G03B 700, G03B 904
Patent
active
040458067
ABSTRACT:
An extended range exposure control system for photographic cameras having an aperture plate slidably movable from a first position in which it stops down the maximum relative aperture of the camera lens to second and third positions in which a photographic circuit is altered while the maximum relative lens aperture is maintained. A shutter mechanism controlled by a light sensitive circuit includes a switch actuated by movement of the aperture plate to the third position to shift the light level sensitivity range of the circuit thereby accommodating shutter speeds necessary to effect exposure of relatively fast film at maximum relative lens aperture. The aperture plate is slidably supported within a housing for the shutter and the respective positions thereof made clearly visible as a result of indicia on the exterior of the housing.
REFERENCES:
patent: RE26627 (1969-07-01), Burgarella et al.
patent: 3205797 (1965-09-01), Land et al.
patent: 3446128 (1969-05-01), Dietz
patent: 3890625 (1975-06-01), Yoshio et al.
patent: 3906526 (1975-09-01), Toyoshima et al.
Ellin Seymour
Sharp John R.
Gellner Michael L.
Hix L. T,.
Polaroid Corporation
Thornton David R.
LandOfFree
Extended range exposure control system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extended range exposure control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extended range exposure control system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-965068