US3317151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection stage apparatus
Assignee: Individual
•
Filing: 1963-07-19
•
Granted: 1967-05-02
•
Expires: 1983-07-19
Abstract
No abstract record available.
Inventors
- 👤 John S Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:34
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; Y; Y10; Y10S; Y10S353/00; Y10S353/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A SUPPLEMENTAL PROJECTOR STAGE ADAPTED TO BE INTERPOSED BETWEEN A PROJECTOR LIGHT SOURCE AND LENS FOR SUPPORTING IMAGE-BEARING FILM FOR PROJECTION, SAID STAGE COMPRISING A FRAME HAVING A CENTRAL WINDOW, A FILM WINDING SPINDLE MOUNTED ON THE FRAME AT ONE SIDE OF THE WINDOW, A REMOVABLE FILM CARTRIDGE HAVING A FILM STORAGE SPINDLE, MEANS FOR RELEASABLY MOUNTING THE CARTRIDGE ON THE FRAME AT THE OTHER SIDE OF THE WINDOW FROM THE WINDING SPINDLE, MEANS FOR SUBJECTING THE STORAGE SPINDLE OF THE CARTRIDGE TO TORQUE TENDING TO REWIND THE FILM THEREON, SAID LAST MEANS COMPRISING A NEGATOR SPRING MOTOR DEVELOPING APPROXIMATELY CONSTANT TORQUE OVER A WIDE RANGE OF FILM MOVEMENT, MEANS FOR MOUNTING SAID MOTOR ON THE FRAME INDEPENDENTLY OF SAID CARTRIDGE, AND A DRIVING COUPLING HAVING SEPARABLE PARTS RESPECTIVELY CONNECTED WITH THE STORAGE SPINDLE AND WITH THE MOTOR, SAID CARTRIDGE AND STORAGE SPINDLE BEING FREELY REMOVABLE UNITARILY.
Claim 2
Dependent Claim
147 words
A SUPPLEMENTAL PROJECTOR STAGE ADAPTED TO BE INTERPOSED BETWEEN A PROJECTOR LIGHT SOURCE AND LENS FOR SUPPORTING IMAGE-BEARING FILM FOR PROJECTION, SAID STAGE COMPRISING A FRAME HAVING A CENTRAL WINDOW, A FILM WINDING SPINDLE MOUNTED ON THE FRAME AT ONE SIDE OF THE WINDOW, A REMOVABLE FILM CARTRIDGE HAVING A FILM STORAGE SPINDLE, MEANS FOR RELEASABLY MOUNTING THE CARTRIDGE ON THE FRAME AT THE OTHER SIDE OF THE WINDOW FROM THE WINDING SPINDLE, MEANS FOR SUBJECTING THE STORAGE SPINDLE OF THE CARTRIDGE TO TORQUE TENDING TO REWIND THE FILM THEREON, SAID LAST MEANS COMPRISING A NEGATOR SPRING MOTOR DEVELOPING APPROXIMATELY CONSTANT TORQUE OVER A WIDE RANGE OF FILM MOVEMENT, MEANS FOR MOUNTING SAID MOTOR ON THE FRAME INDEPENDENTLY OF SAID CARTRIDGE, AND A DRIVING COUPLING HAVING SEPARABLE PARTS RESPECTIVELY CONNECTED WITH THE STORAGE SPINDLE AND WITH THE MOTOR, SAID CARTRIDGE AND STORAGE SPINDLE BEING FREELY REMOVABLE UNITARILY.
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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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |