US4609271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small size camera
Assignee: Canon Inc
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Filing: 1985-02-07
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Granted: 1986-09-02
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Expires: 2005-02-07
Abstract
Abstract Disclosed is a method for reducing the dimensions of cameras by arranging the film supplying chamber and the film winding chamber on both sides of the aperture, and by projecting at least one of the external walls defining these chambers into the space behind the photographing lens to avoid interfering with the image forming optical path.
Inventors
- 👤 Yoshiaki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:15
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
328 words
A small size camera using 35 mm film comprising: a camera body; a photographing lens arranged in the front part of said camera body and having a divergent lens so as to reduce the total length of the lens; an aperture part formed at the rear part of said camera body as an opening for a photo-taking; said camera body having a space formed behind the photographing lens; said space comprising an image forming optical path zone and a zone excluding the image forming optical path zone, said latter zone increasing forward the front portion of the camera body by virtue of the divergent lens; a film supplying chamber formed at one end of the camera body, said film supplying chamber having an opening facing in a slantedly backward external direction; a film winding chamber formed at the other end of the camera body, said film winding chamber having an opening facing in a slantedly backward external direction; wall parts dividing the space into the film supplying chamber and the film winding chamber, wherein at least one of said wall parts largely projects into the zone including the image forming optical path zone so that a lateral width of the total camera is made shorter; wherein a dimensional condition of a'<W is satisfied, in which a' is the shortest distance between the wall part of the film supplying chamber and that of the film winding chamber, while W is the width of the aperture part and wherein a film magazine engaging part is provided at the edge between the wall part of the film supplying chamber and the aperture part, said film magazine engaging part engaging with a film exit means of the loaded film magazine so as to stabilize the loaded film magazine; and further comprising a film guide rail arranged above the aperture part, said rail providing a curved portion at the wall part of the film winding chamber so as to stabilize the film feeding.
Claim 2
Dependent Claim
328 words
A small size camera using 35 mm film comprising: a camera body; a photographing lens arranged in the front part of said camera body and having a divergent lens so as to reduce the total length of the lens; an aperture part formed at the rear part of said camera body as an opening for a photo-taking; said camera body having a space formed behind the photographing lens; said space comprising an image forming optical path zone and a zone excluding the image forming optical path zone, said latter zone increasing forward the front portion of the camera body by virtue of the divergent lens; a film supplying chamber formed at one end of the camera body, said film supplying chamber having an opening facing in a slantedly backward external direction; a film winding chamber formed at the other end of the camera body, said film winding chamber having an opening facing in a slantedly backward external direction; wall parts dividing the space into the film supplying chamber and the film winding chamber, wherein at least one of said wall parts largely projects into the zone including the image forming optical path zone so that a lateral width of the total camera is made shorter; wherein a dimensional condition of a'<W is satisfied, in which a' is the shortest distance between the wall part of the film supplying chamber and that of the film winding chamber, while W is the width of the aperture part and wherein a film magazine engaging part is provided at the edge between the wall part of the film supplying chamber and the aperture part, said film magazine engaging part engaging with a film exit means of the loaded film magazine so as to stabilize the loaded film magazine; and further comprising a film guide rail arranged above the aperture part, said rail providing a curved portion at the wall part of the film winding chamber so as to stabilize the film feeding.
Claim 3
Dependent Claim
160 words
A small size camera comprising: (a) a camera body; (b) a photographing lens arranged in the front part of said camera body; (c) an aperture part formed at the rear part of said camera body as an opening for a photo-taking; (d) said camera body having a space formed behind the photographing lens; (e) a film supplying chamber formed at one end of the camera body; (f) a film winding chamber formed at the other end of the camera body, said film winding chamber having an opening facing in a slantedly backward external direction; (g) wall parts dividing the space into the film supplying chamber and the film winding chamber, wherein at least one of said wall parts projects into the space so that a lateral width of the total camera is made shorter; and (h) a film guide part providing a curved portion at the wall part of the film winding chamber so as to stabilize the film feeding.
Claim 4
Dependent Claim
160 words
A small size camera comprising: (a) a camera body; (b) a photographing lens arranged in the front part of said camera body; (c) an aperture part formed at the rear part of said camera body as an opening for a photo-taking; (d) said camera body having a space formed behind the photographing lens; (e) a film supplying chamber formed at one end of the camera body; (f) a film winding chamber formed at the other end of the camera body, said film winding chamber having an opening facing in a slantedly backward external direction; (g) wall parts dividing the space into the film supplying chamber and the film winding chamber, wherein at least one of said wall parts projects into the space so that a lateral width of the total camera is made shorter; and (h) a film guide part providing a curved portion at the wall part of the film winding chamber so as to stabilize the film feeding.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |