Patent US3148606A successfully refreshed from Google Patents.
US3148606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focal plane shutter mechanism
Assignee: Individual
•
Filing: 1963-01-29
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Granted: 1964-09-15
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Expires: 1983-01-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas Terry
- 👤 Richard D Dafrico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:41
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08; G03B9/28; G03B9/32; G03B9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN AN AUTOMATIC RESETTING FOCAL PLANE SHUTTER FOR CAMERAS, THE COMBINATION COMPRISING: A PAIR OF CURTAIN DRUMS SPACED IN PARALLEL RELATION TO EACH OTHER; A CURTAIN WOUND ENDWISE THEREBETWEEN AND HAVING AN APERTURE THEREIN; A SHEAVE COAXIAL WITH EACH OF SAID DRUMS AND SUPPORTING AN ENDLESS BAND THEREBETWEEN; A MASK FIXED TO SAID BANDS ADJACENT TO THE APERTURE OF SAID CURTAIN DEFINING THEREBY THE WIDTH OF THE EXPOSURE SLIT DURING EXPOSURE; A ROTATABLE CLUTCH MEANS HAVING AN OUTPUT DRIVINGLY CONNECTED TO ONE OF SAID DRUMS FOR TRANSPORTING THE APERTURE OF SAID CURTAIN ACROSS A PICTURE FORMAT; AN EPICYCLIC GEAR MEANS AND A LOST-MOTION MEANS CONNECTED IN SERIES BETWEEN THE OUTPUT OF SAID CLUTCH MEANS AND ONE OF SAID SHEAVES FOR TRANSPORTING SAID MASK IN UNISON WITH SAID CURTAIN; SAID GEAR MEANS INCLUDING SLIT ADJUSTING MEANS FOR VARYING THE POSITION OF SAID MASK RELATIVE TO SAID CURTAIN; SAID LOST-MOTION MEANS PROVIDING LIMITED RELATIVE MO-
Claim 2
Dependent Claim
153 words
IN AN AUTOMATIC RESETTING FOCAL PLANE SHUTTER FOR CAMERAS, THE COMBINATION COMPRISING: A PAIR OF CURTAIN DRUMS SPACED IN PARALLEL RELATION TO EACH OTHER; A CURTAIN WOUND ENDWISE THEREBETWEEN AND HAVING AN APERTURE THEREIN; A SHEAVE COAXIAL WITH EACH OF SAID DRUMS AND SUPPORTING AN ENDLESS BAND THEREBETWEEN; A MASK FIXED TO SAID BANDS ADJACENT TO THE APERTURE OF SAID CURTAIN DEFINING THEREBY THE WIDTH OF THE EXPOSURE SLIT DURING EXPOSURE; A ROTATABLE CLUTCH MEANS HAVING AN OUTPUT DRIVINGLY CONNECTED TO ONE OF SAID DRUMS FOR TRANSPORTING THE APERTURE OF SAID CURTAIN ACROSS A PICTURE FORMAT; AN EPICYCLIC GEAR MEANS AND A LOST-MOTION MEANS CONNECTED IN SERIES BETWEEN THE OUTPUT OF SAID CLUTCH MEANS AND ONE OF SAID SHEAVES FOR TRANSPORTING SAID MASK IN UNISON WITH SAID CURTAIN; SAID GEAR MEANS INCLUDING SLIT ADJUSTING MEANS FOR VARYING THE POSITION OF SAID MASK RELATIVE TO SAID CURTAIN; SAID LOST-MOTION MEANS PROVIDING LIMITED RELATIVE MO-
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |