US3429247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic shutter
Assignee: Polaroid Corp
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Filing: 1966-10-12
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Granted: 1969-02-25
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Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 Christopher R Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:48
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A SHUTTER FOR PHOTOGRAPHIC APPARATUS INCLUDING AT LEAST ONE EXPOSURE APERTURE COMPRISING: (A) A BLADE MOUNTED FOR OPENING AND CLOSING MOVEMENT IN ONE DIRECTION RELATIVE TO SAID EXPOSURE APERTURE; (B) A SUPPORT MOUNTED FOR SAID MOVEMENT RELATIVE TO SAID APERTURE IN SAID DIRECTION; (C) A CANTILEVER SPRING MOUNTED ON SAID SUPPORT FOR MOVEMENT THEREWITH, SAID SPRING BEING CONNECTED INTERMEDIATE ITS ENDS TO SAID MOVING SAID SUPPORT AND (D) ACTUATING MEANS FOR MOVING SAID SUPPORT AND SPRING IN SAID DIRECTION; AND (E) RETAINING MEANS FOR MOVING SAID SUPPORT AND OF THE FREE END SECTION OF SAID SPRING FOR ENGAGING AND RESISTING MOVEMENT THEREOF AND FLEXING SAID SPRING IN RESPONSE TO MOVEMENT OF SAID BASE; (F) SAID RETAINING MEANS BEING POSITIONED TO PERMIT SAID SPRING TO ESCAPE FOLLOWING PREDETERMINED FLEXURE THEREOF WHEREBY ENERGY STORED IN SAID FLEXED SPRING IS RELEASED TO IMPART RAPID OPENING AND CLOSING MOVEMENT TO SAID SHUTTER BLADE IN SAID DIRECTION.
Claim 2
Dependent Claim
152 words
A SHUTTER FOR PHOTOGRAPHIC APPARATUS INCLUDING AT LEAST ONE EXPOSURE APERTURE COMPRISING: (A) A BLADE MOUNTED FOR OPENING AND CLOSING MOVEMENT IN ONE DIRECTION RELATIVE TO SAID EXPOSURE APERTURE; (B) A SUPPORT MOUNTED FOR SAID MOVEMENT RELATIVE TO SAID APERTURE IN SAID DIRECTION; (C) A CANTILEVER SPRING MOUNTED ON SAID SUPPORT FOR MOVEMENT THEREWITH, SAID SPRING BEING CONNECTED INTERMEDIATE ITS ENDS TO SAID MOVING SAID SUPPORT AND (D) ACTUATING MEANS FOR MOVING SAID SUPPORT AND SPRING IN SAID DIRECTION; AND (E) RETAINING MEANS FOR MOVING SAID SUPPORT AND OF THE FREE END SECTION OF SAID SPRING FOR ENGAGING AND RESISTING MOVEMENT THEREOF AND FLEXING SAID SPRING IN RESPONSE TO MOVEMENT OF SAID BASE; (F) SAID RETAINING MEANS BEING POSITIONED TO PERMIT SAID SPRING TO ESCAPE FOLLOWING PREDETERMINED FLEXURE THEREOF WHEREBY ENERGY STORED IN SAID FLEXED SPRING IS RELEASED TO IMPART RAPID OPENING AND CLOSING MOVEMENT TO SAID SHUTTER BLADE IN SAID DIRECTION.
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |