US3817608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion picture camera with adjustable shutter
Assignee: Agfa Gevaert AG
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Filing: 1972-12-14
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Granted: 1974-06-18
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Expires: 1992-12-14
Abstract
Abstract A motion picture camera for use with film-containing cassettes having externally applied encoded information which is indicative of the sensitivity of confined film employs a scanning lever or slide which is displaced by the encoded information on a properly inserted cassette and thereby adjusts the size of the opening which is defined by the blades of a rotary shutter. This insures that the length of exposure times is a function of the sensitivity of film in the housing of the camera. A cassette containing highly sensitive film will cause the lever or slide to select relatively long exposure times so that the user can make exposures when the scene light is weak without using an electronic flash unit or an analogous source of artificial light. The exposure times will be relatively short when the camera contains film of average sensitivity which can be used in broad daylight whereby the selection of relatively short exposure times reduces the likelihood that the quality of exposures would be affected by camera shake. The camera is provided with an overriding knob which enables the user to adjust the shutter independently of the sensitivity of film in that cassette which is properly installed in the camera body.
Inventors
- 👤 K Neudecker
- 👤 A Theer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:49
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/18; G03B9/00; G03B9/08; G03B9/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
In a photographic apparatus for use with cassettes or analogous receptacles containing motion picture film and having encoded information which is indicative of a characteristic, particularly the sensitivity, of film therein, a combination comprising a housing arranged to support receptacles containing films of different characteristics; adjustable mobile shutter means mounted in said housing and defining a light-admitting opening of Variable size whereby the size of said opening at a given speed of said shutter means determines the length of exposure times furnished by said shutter means; adjusting means mounted in said housing and actuatable to adjust said shutter means; and information-scanning actuating means mounted in said housing to actuate said adjusting means and to thus effect an adjustment of said shutter means as a function of the characteristic of motion picture film in that receptacle whose encoded information is scanned by said actuating means.
Claim 2
Dependent Claim
144 words
In a photographic apparatus for use with cassettes or analogous receptacles containing motion picture film and having encoded information which is indicative of a characteristic, particularly the sensitivity, of film therein, a combination comprising a housing arranged to support receptacles containing films of different characteristics; adjustable mobile shutter means mounted in said housing and defining a light-admitting opening of Variable size whereby the size of said opening at a given speed of said shutter means determines the length of exposure times furnished by said shutter means; adjusting means mounted in said housing and actuatable to adjust said shutter means; and information-scanning actuating means mounted in said housing to actuate said adjusting means and to thus effect an adjustment of said shutter means as a function of the characteristic of motion picture film in that receptacle whose encoded information is scanned by said actuating means.
Claim 3
Dependent Claim
62 words
A combination as defined in claim 1, wherein said shutter means is a rotary shutter including first and second light obstructing elements rotatable about a common axis and defining said opening, at least one of said elements being movable by said adjusting means relative to the other of said elements about said common axis to thereby change the size of said opening.
Claim 4
Dependent Claim
69 words
A combination as defined in claim 1, wherein said actuating means comprises a lever which is pivotably mounted in said housing and comprises first and second portions, and means for biasing said first portion of said lever against the encoded information on a receptacle in said housing, said adjusting means comprising a mobile input member and means for biasing said input member against said second portion of said lever.
Claim 5
Dependent Claim
67 words
A combination as defined in claim 1, wherein said actuating means comprises a motion transmitting member which is reciprocable in said housing and comprises first and second portions, and means for biasing said first portion of said member against the encoded information on a receptacle in said housing, said adjusting means comprising a mobile input member receiving motion from said second portion of said motion transmitting member.
Claim 6
Dependent Claim
23 words
A combination as defined in claim 4, wherein said second portion of said motion transmitting member is bifurcated and straddles said input member.
Claim 7
Dependent Claim
37 words
A combination as defined in claim 1, further comprising an adjustable diaphragm and means for adjusting said diaphragm as a function of the characteristic of film in that receptacle whose information is scanned by said actuating means.
Claim 8
Dependent Claim
75 words
A combination as defined in claim 6, wherein said diaphragm adjusting means comprises a photosensitive element which is exposed to scene light and is arranged to adjust the diaphgram as a function of the intensity of light impinging thereon, and light intensity modifying means operatively connected with one of said actuating and adjusting means to modify the intensity of light impinging on said photosensitive element as a function of the position of said one means.
Claim 9
Dependent Claim
16 words
A combination as defined in claim 7, wherein said light intensity modifying means is a filter.
Claim 10
Dependent Claim
17 words
A combination as defined in claim 7, wherein said light intensity modifying means is an auxiliary diaphragm.
Claim 11
Dependent Claim
15 words
A combination as defined in claim 7, wherein said one means is said actuating means.
Claim 12
Dependent Claim
29 words
A combination as defined in claim 1, further comprising overriding means operable to actuate said adjusting means independently of the characteristic of film in a receptacle in said housing.
Claim 13
Dependent Claim
40 words
A combination as defined in claim 11, wherein said actuating means is movable between a plurality of positions each of which corresponds to a different size of said opening and said overriding means is operatively connected with said actuating means.
Claim 14
Dependent Claim
35 words
A combination as defined in claim 11, wherein said overriding means is movable by hand to a position in which said actuating means is disengaged from the encoded information on a receptacle in said housing.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |