US3136209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film gate guide mechanism for motion picture projector
Assignee: 3M Co
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Filing: 1960-09-30
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Granted: 1964-06-09
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Expires: 1980-09-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore S Briskin
- 👤 Robert L Moore
- 👤 Rudolph A Rom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:13
CPC Classifications
G; G03; G03B; G03B1/00; G03B1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN AN AUTOMATIC FILM THREADING MECHANISM FOR A MOTION PICTURE PROJECTOR OF THE TYPE HAVING A PROJECTION APERTURE, A FILM GATE ASSEMBLY INCLUDING MEANS FOR INTERMITTENTLY ADVANCING FILM PAST THE PROJECTION APERTURE, AND MEANS FOR CONTINUOUSLY FEEDING FILM TO THE FILM GATE ASSEMBLY, MEANS FOR GUIDING THE FILM THROUGH THE FILM GATE ASSEMBLY COMPRISING THE COMBINATION OF A FIXED GUIDE FOR ENGAGING ONE EDGE OF THE FILM, A MOVABLE GUIDE FOR ENGAGING THE OPPOSITE EDGE OF THE FILM, SAID MOVABLE GUIDE BEING PIVOTALLY MOUNTED WITH ITS LOWER END NORMALLY POSITIONED IN THE FILM PATH BUT ADAPTED TO BE MOVED OUT OF THE FILM PATH BY THE LEADING EDGE OF THE FILM AS IT ADVANCES THROUGH THE FILM GATE ASSEMBLY, SPRING MEANS FOR URGING SAID PIVOTALLY MOUNTED MOVABLE GUIDE TOWARD SAID FIXED EDGE GUIDE AFTER THE LOWER END OF SAID MOVABLE GUIDE HAS BEEN MOVED OUT OF THE FILM PATH, A STATIONARY APERTURE PLATE, A COOPERATING MOVABLE PRESSURE PAD, FULCRUM MEANS POSITIONED ON SAID STATIONARY APERTURE PLATE BELOW THE INTERMITTENT FILM-ADVANCING MEANS AND OUTSIDE
Claim 2
Dependent Claim
173 words
IN AN AUTOMATIC FILM THREADING MECHANISM FOR A MOTION PICTURE PROJECTOR OF THE TYPE HAVING A PROJECTION APERTURE, A FILM GATE ASSEMBLY INCLUDING MEANS FOR INTERMITTENTLY ADVANCING FILM PAST THE PROJECTION APERTURE, AND MEANS FOR CONTINUOUSLY FEEDING FILM TO THE FILM GATE ASSEMBLY, MEANS FOR GUIDING THE FILM THROUGH THE FILM GATE ASSEMBLY COMPRISING THE COMBINATION OF A FIXED GUIDE FOR ENGAGING ONE EDGE OF THE FILM, A MOVABLE GUIDE FOR ENGAGING THE OPPOSITE EDGE OF THE FILM, SAID MOVABLE GUIDE BEING PIVOTALLY MOUNTED WITH ITS LOWER END NORMALLY POSITIONED IN THE FILM PATH BUT ADAPTED TO BE MOVED OUT OF THE FILM PATH BY THE LEADING EDGE OF THE FILM AS IT ADVANCES THROUGH THE FILM GATE ASSEMBLY, SPRING MEANS FOR URGING SAID PIVOTALLY MOUNTED MOVABLE GUIDE TOWARD SAID FIXED EDGE GUIDE AFTER THE LOWER END OF SAID MOVABLE GUIDE HAS BEEN MOVED OUT OF THE FILM PATH, A STATIONARY APERTURE PLATE, A COOPERATING MOVABLE PRESSURE PAD, FULCRUM MEANS POSITIONED ON SAID STATIONARY APERTURE PLATE BELOW THE INTERMITTENT FILM-ADVANCING MEANS AND OUTSIDE
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |