Patent US4611894A successfully refreshed from Google Patents.
US4611894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for direct cinematographic viewing of stereoscopic images on film with a sound track
Assignee: Staar Development Co SA
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Filing: 1985-02-06
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Granted: 1986-09-16
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Expires: 2005-02-06
Abstract
Abstract Mobile refractive optical members are placed in a device between the film and stereoscopic direct viewing windows. A drive is provided for driving the film strip bearing stereoscopic images and the mobile refractive optical members at a uniformly constant speed and in synchronism across the fields of view of the viewing windows to provide a fixed image in each window despite the motion of the film; the film strip has a sound track which may be reproduced by conventional reproduction equipment since the film strip is driven at a constant speed.
Inventors
- 👤 Marcel Staar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B41/00; G03B41/02; G03B41/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
263 words
A device for cinematographic viewing of images on a strip of film comprising: a housing having a viewing window to allow viewing of the images on the film strip through a field of view; drive means in the housing adapted to receive and continuously move the film strip to pass the images on the film across the field of view of said viewing window; and mobile refractive optical means in said housing movable by said drive means between the film strip and the viewing window across the field of view in synchronism with the passage of the film strip images and forming an optical image which is visible through the window as the film strip images enter and move across the field of view and which is fixed despite the continuous motion of the images on the film strip, said mobile refractive optical means movable between the film strip and the viewing window comprising: magnifying lenses movable in succession across the field of view, the full passage of each magnifying lens corresponding to the full passage of an image on the film strip past the window, a dish-shaped element supporting said lenses at its periphery obliquely to the plane of said dish-shaped element, said lenses and dish-shaped element being formed integrally as an injection-molded plastic part, and means for rotatably supporting the dish-shaped element with the plane of the element inclined to a viewing axis intersecting one of said lenses and said window, each lens being movable across the field of view substantially transverse to said viewing axis as the dish-shaped element rotates.
Claim 2
Independent Claim
263 words
A device for cinematographic viewing of images on a strip of film comprising: a housing having a viewing window to allow viewing of the images on the film strip through a field of view; drive means in the housing adapted to receive and continuously move the film strip to pass the images on the film across the field of view of said viewing window; and mobile refractive optical means in said housing movable by said drive means between the film strip and the viewing window across the field of view in synchronism with the passage of the film strip images and forming an optical image which is visible through the window as the film strip images enter and move across the field of view and which is fixed despite the continuous motion of the images on the film strip, said mobile refractive optical means movable between the film strip and the viewing window comprising: magnifying lenses movable in succession across the field of view, the full passage of each magnifying lens corresponding to the full passage of an image on the film strip past the window, a dish-shaped element supporting said lenses at its periphery obliquely to the plane of said dish-shaped element, said lenses and dish-shaped element being formed integrally as an injection-molded plastic part, and means for rotatably supporting the dish-shaped element with the plane of the element inclined to a viewing axis intersecting one of said lenses and said window, each lens being movable across the field of view substantially transverse to said viewing axis as the dish-shaped element rotates.
Claim 3
Dependent Claim
34 words
A device according to claim 1, said dish-shaped element having integral molded gear teeth at its periphery providing a gear for cooperation with a drive gear of said drive means for rotating said element.
Claim 4
Dependent Claim
26 words
A device according to claim 2, said drive gear of said drive means having a substantially smaller diameter than the diameter of the dish-shaped element gear.
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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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |