US3836932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic camera with interchangeable film system
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1973-11-09
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Granted: 1974-09-17
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Expires: 1993-11-09
Abstract
Abstract A photographic camera having a film-changing and multi-circuit vacuum system, especially for application in process photography. The improvements include: GUIDES FOR THE USE OF ARBITRARY FILM WIDTHS PROVIDED IN THE CAMERA; A FILM PLATE TO ACCOMMODATE THE SEATING OF THE LARGEST ANTICIPATED FILM WIDTH AND HAVING AT LEAST TWO CENTERING PINS FOR EACH FILM CONTAINER; A COUPLE FOR EACH FILM CONTAINER CENTERED BETWEEN THE CENTERING PINS FORMING A CONNECTION BETWEEN THE CAMERA DRIVE AND THE FILM CONTAINER FOR FILM TRANSPORT; AND INTERCHANGEABLE BRIDGING MEMBERS LOCATED ON THE CENTERING PINS WHICH COUPLE BOTH THE COUPLES AND THE FILM CONTAINERS SO THAT ANY KIND OF FILM WIDTH AND FILM CONTAINER WHICH FITS ON THE FILM PLATE MAY BE USED.
Inventors
- 👤 G Lohl
- 👤 W Schneider
- 👤 H Schroder
- 👤 R Noack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:18
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587; G03B27/60
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
133 words
In a photographic camera having a film-changing system, a vacuum board film support connected to a multi-circuit system and a film plate for mounting film containers, the improvement comprising: means for guiding film of variable widths provided in the camera; said film plate having a given size to accommodate the width extremity of said film and having a plurality of centering pins projecting from said film plate for mounting said film containers; coupling means mounted in said film plate between said centering pins providing a connection between a first drive in said camera and a second drive in said film container for transport of said film; and interchangeable briding members mounted on said centering pins coupling said coupling means and said film containers whereby variable film widths and film container sizes are accommodated.
Claim 2
Dependent Claim
133 words
In a photographic camera having a film-changing system, a vacuum board film support connected to a multi-circuit system and a film plate for mounting film containers, the improvement comprising: means for guiding film of variable widths provided in the camera; said film plate having a given size to accommodate the width extremity of said film and having a plurality of centering pins projecting from said film plate for mounting said film containers; coupling means mounted in said film plate between said centering pins providing a connection between a first drive in said camera and a second drive in said film container for transport of said film; and interchangeable briding members mounted on said centering pins coupling said coupling means and said film containers whereby variable film widths and film container sizes are accommodated.
Claim 3
Dependent Claim
48 words
ThE photographic camera of claim 1, wherein said vacuum board film support is a compression plate (9) having suction apertures (9c) connected to said multi-circuit vacuum system, having vacuum lines closing on themselves (9a, 9b) said compression plate having pivot means and means for accommodating variable film widths.
Claim 4
Dependent Claim
44 words
The photographic camera of claim 2, wherein said vacuum lines (9a, 9b) have gating means (18) activated by setting means (19), said gating means switching a portion of said vacuum lines in or out of suction flow depending on the film width being used.
Claim 5
Dependent Claim
15 words
The photographic camera of claim 3, wherein said gating means are mechanically actuated sliders (18).
Claim 6
Dependent Claim
15 words
The photographic camera of claim 3, wherein said gating means are electromechanically actuated sliders (18).
Claim 7
Dependent Claim
16 words
The photograhic camera of claim 3, wherein said gating means are actuated by setting means (19).
Claim 8
Dependent Claim
14 words
The photographic camera of claim 6, wherein said setting means are electromagnetic switches (19).
Claim 9
Dependent Claim
51 words
The photographic camera of claim 7, having a mirror housing (6) in said camera, said means for guiding film including a format plate (10, 20) located on said mirror housing and having an image window (10d, 20d) therein and said format plate having a handle (10g, 20g) facilitating a change-over procedure.
Claim 10
Dependent Claim
36 words
The photographic camera of claim 8, wherein said format plate (10, 20) has means for seating format limiting masks (22) facilitating reproduction formats smaller than said image window (10d, 20d) of said format plate (10, 20).
Claim 11
Dependent Claim
44 words
The photographic camera of claim 8, wherein said format plate (20) is provided with cams (20e) activating switches (21) which in turn are connected to said electromagnetic switches (19) to move said gating means (18) during the change-over procedure of said format plate (20).
Claim 12
Dependent Claim
60 words
The photographic camera of claim 8, wherein said centering pins (23, 24) are provided with flanges (23a, 24a) above the lower extremities (23d, 24d) of said centering pins, said flanges supporting said film containers and said bridging members and having a given height to secure the position of the film center with respect to the center of said image window.
Claim 13
Dependent Claim
41 words
The photographic camera of claim 11, wherein said centering pins (23, 24) have shanks (23c, 24c) adapted to be spring loaded in the radial direction in order to provide play-less seating and centering of said film containers and said bridging members.
Claim 14
Dependent Claim
67 words
The photographic camera of claim 1, wherein said coupling means comprise a spur gear (26) provided with a shank (26a) defined by a hollow axle, said shank rigidly connected to said spur gear (26) and a driver claw set (25), said hollow axle is fixed in the axial direction but rotatably mounted on a spacer bolt (27) which in turn is mounted on said film plate (2).
Claim 15
Dependent Claim
61 words
The photographic camera of claim 13, wherein said spacer bolt (27) has a threaded plug (32) mounted therein having a head (32a) and a spring biasing said head and said driver claw set (25) to movably support said shank in axial direction while preventing rotation on its own and providing an elastic coupling with said bridging members and said film containers.
Claim 16
Dependent Claim
61 words
The photographic camera of claim 1, wherein said bridging members comprise a bridge part (34), two centering bushings (37, 38), mounted on said bridge part separated by the distance between said centering pins, a pinion (41) coupling a driver claw set (25) of said camera and a coupling component connected to said pinion (41) and operatively connected to said film containers.
Claim 17
Dependent Claim
59 words
The photographic camera of claim 15, wherein said coupling component connects with a drive axle (39), a reel (46) accommodating a predetermined film width, said drive axle (39) having different cross sectional shape in longitude, said drive axle rotatably mounted in bridge part (34) of said briding members and rigidly connected with pinIon (41) and fixed in axial direction.
Claim 18
Dependent Claim
17 words
The photographic camera of claim 16, wherein said axle (39) has a polygonal cross sectional shape (44).
Claim 19
Dependent Claim
69 words
The photographic camera of claim 15, wherein said coupling component connects with said drive axle (39) a correspondingly shaped reel accommodating narrow film widths, said drive axle comprising a dual axle (49) having different cross sectional shapes with respect to the longitudinal axis and said drive axle is rotatably mounted in bridge part (34) of said bridging members and rigidly connected with pinion (51) and fixed in axial direction.
Claim 20
Dependent Claim
82 words
The photographic camera of claim 18, wherein axle (49) has a lower, cylindrical end (50) provided with a flange (52) supporting said reel (47), tangential surfaces for driving said reel (47) are provided above said flange on a part (54) of said axle (49) projecting beyond said flange, and said axle (49) has an upper end (49a) provided with a securing lever (57) located in a slit (55) tipped over a hinge pin (56) for securing said reel (47) in axial direction.
Claim 21
Dependent Claim
65 words
The photographic camera of claim 18, wherein said coupling component connects with a drive axle (71) of a cassette-loaded film (14), said drive axle comprising an axially fixed axle (66) connected with a pinion (33) and rotatably supported in a bridge part (34) of said bridging members, a driver claw set axially movable on said fixed axle (66) but secured against rotating on its own.
Claim 22
Dependent Claim
28 words
The photographic camera of claim 20, wherein centering bushings (64, 65) are fastened to bridge part (34) and centering bolts (62, 63) are mounted above said centering bushings.
Claim 23
Dependent Claim
35 words
The photographic camera of claim 21, wherein said bridge part is connected to said centering pins to center said film over an image window (10d, 20d) of a format plate (10, 20) of said camera.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |