US3988754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fast operating slit shutter camera
Assignee: Hittech Prontor GmbH
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Filing: 1975-05-28
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Granted: 1976-10-26
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Expires: 1995-05-28
Abstract
Abstract This invention is directed to a photographic camera having a slit shutter which utilizes two cover systems which operate above the plane of the image. These systems are movable perpendicularly to the direction of movement of the film within the camera. Each cover system comprises displaceable segments movable relative to each other. These can be brought into and out of overlapping position at a corresponding opposed end of the image window. When open, they extend across the window to cover the window, and when closed they recede into overlapping position to uncover the window. While broadly speaking, the so-called "slit shutter" type of shutter has been used, the herein described proposal for providing the open and closed systems is unique. This invention provides multiple segments which are movable relative to each other in which the corresponding slit-forming segment of each cover system is guidingly supported for displacement by link means and at least two cover segments are associated with each slit-forming segment and correspondingly guidingly supported for displacement by straight guide means, preferably so that each of the slit-forming segments and the cover segments associated therewith are connected directly to form a generally parallelogram link formation for common drive.
Inventors
- 👤 Waldemar T. Rentschler
- 👤 Franz W. R. Starp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:25
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/10; G03B9/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
Slit shutter structure for a camera, comprising a shutter frame provided with an image window having a pair of opposed edges, a corresponding pair of opposed slit-shutter cover systems operating above the plane of the image window, each said system comprising relatively displaceable segments including a slit-forming segment forming the corresponding exposure slit edge and at least two cover segments associated therewith, said segments of each system being sequentially movable out of an overlapping position at a corresponding said opposed edge of the image window into an extended position across the image window, to shut said window, both said cover systems cooperating in such manner for movement during shutter operation that when one said cover system is moved into the overlapping position of its segments for shutter opening, the other cover system is moved in turn after a predetermined exposure time interval into the extended position of its segments for shutter closing, links on the shutter frame guidingly supporting the slit-forming segment of each cover system for movement of such slit-forming segment between such positions, and straight guides on the shutter frame guidingly supporting the cover segments associated with each said slit-forming segment for corresponding movement of such at least two cover segments between such positions.
Claim 2
Dependent Claim
206 words
Slit shutter structure for a camera, comprising a shutter frame provided with an image window having a pair of opposed edges, a corresponding pair of opposed slit-shutter cover systems operating above the plane of the image window, each said system comprising relatively displaceable segments including a slit-forming segment forming the corresponding exposure slit edge and at least two cover segments associated therewith, said segments of each system being sequentially movable out of an overlapping position at a corresponding said opposed edge of the image window into an extended position across the image window, to shut said window, both said cover systems cooperating in such manner for movement during shutter operation that when one said cover system is moved into the overlapping position of its segments for shutter opening, the other cover system is moved in turn after a predetermined exposure time interval into the extended position of its segments for shutter closing, links on the shutter frame guidingly supporting the slit-forming segment of each cover system for movement of such slit-forming segment between such positions, and straight guides on the shutter frame guidingly supporting the cover segments associated with each said slit-forming segment for corresponding movement of such at least two cover segments between such positions.
Claim 3
Dependent Claim
92 words
Slit-shutter structure according to claim 1 wherein the links supporting each said slit-forming segment are connected to form a parallel linkage in which the sides of the links are drivable operatively in the same direction and at the same speed, and said links are pivotably connected to the corresponding slit-forming segment to pivot about a pair of corresponding spaced apart points located on the corresponding slit-forming segment to the right and left of the center of gravity of such slit-forming segment with respect to the direction of movement of such slit-forming segment.
Claim 4
Dependent Claim
84 words
Slit-shutter structure according to claim 2, wherein the parallel linkage comprises a parallel guide formed of two links constituting adjacent double-armed angled levers, each lever having a pair of opposed arms extending from an angle apex portion, said levers being pivoted in the vicinity of the corresponding apex portion to said shutter frame, and coupling means are operatively provided between an arm of one of the levers and an adjacent corresponding arm of the other of the levers to interconnect said levers operatively thereat.
Claim 5
Dependent Claim
66 words
Slit-shutter structure according to claim 3 wherein the cover segments associated with the slit-forming segment of each cover system are connected in drivable engagement with the double-armed angled levers of the corresponding parallel linkage for such cover system, operatively to provide with respect to such slit-forming segment and such cover segments lever ratios which determine the path which each of the segments travels during shutter operation.
Claim 6
Dependent Claim
32 words
Slit-shutter structure according to claim 4 wherein drive means are provided respectively to drive the parallel linkage and in turn move the so-guidingly supported segments of each cover system for shutter operation.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |