US3597059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow-motion camera
Assignee: Pentacon GmbH Foto und Feinwerktechnik
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Filing: 1968-09-13
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Granted: 1971-08-03
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Expires: 1988-09-13
Abstract
Abstract The slow-motion camera has a compensating prism rotatably mounted in a prism holder detachable from the camera housing. The prism is driven by a disengageable coupling from the film drive sprocket which moves in synchronism with the running of the film. When the coupling is disengaged a blocking pin secures the prism against rotation, with its parallel faces transversely of the optical axis.
Inventors
- 👤 Herbert Gopfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:53
CPC Classifications
G; G03; G03B; G03B41/00; G03B41/02; G03B41/04; G03B41/08; G01; G01R; G01R13/00; G01R13/20; G01R13/204
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
In a slow-motion camera having an objective lens and film drive mechanism, the provision of film engaging the driving means driven by said mechanism, removable and replaceable compensating prism having a plurality of parallel pairs of diametrically opposed entry and exit surfaces and being rotatably disposed in the optical axis of the camera for transmitting the image to be filmed to the film, a holder arranged within the camera for supporting said prism, a disengageable coupling for effecting a driving connection between said prism and the drive means and blocking means arranged within said camera for blocking the prism against rotational movement and locating the latter with one pair of parallel surfaces at the normal to the optical axis when said coupling is in its disengaged state, said holder being movable to effect disengagement of said coupling and to facilitate removal of said prism if desired.
Claim 2
Dependent Claim
146 words
In a slow-motion camera having an objective lens and film drive mechanism, the provision of film engaging the driving means driven by said mechanism, removable and replaceable compensating prism having a plurality of parallel pairs of diametrically opposed entry and exit surfaces and being rotatably disposed in the optical axis of the camera for transmitting the image to be filmed to the film, a holder arranged within the camera for supporting said prism, a disengageable coupling for effecting a driving connection between said prism and the drive means and blocking means arranged within said camera for blocking the prism against rotational movement and locating the latter with one pair of parallel surfaces at the normal to the optical axis when said coupling is in its disengaged state, said holder being movable to effect disengagement of said coupling and to facilitate removal of said prism if desired.
Claim 3
Dependent Claim
81 words
A slow-motion camera according to claim 1, wherein said film driving means is in The form of a sprocket and said disengageable coupling comprises coupling pins, extending from the sprocket parallel to its axis, engageable with bores provided in one end of the compensating prism, said prism holder being displaceable parallel with the axis of rotation of the prism, and said blocking means being in the form of a bolt engageable with a bore in the other end of the prism.
Claim 4
Dependent Claim
27 words
A slow-motion camera according to claim 2, wherein said bolt is resiliently mounted in the camera for movement substantially parallel to the rotational axis of the prism.
References Cited (Backward Citations)
US3259448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |