Patent US3254585A successfully refreshed from Google Patents.
US3254585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focusing mechanism for photographic cameras
Assignee: Graflex Inc
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Filing: 1964-02-10
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Granted: 1966-06-07
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Expires: 1984-02-10
Abstract
No abstract record available.
Inventors
- 👤 Archie H Gorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:00
CPC Classifications
G; G03; G03B; G03B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FOCUSING MECHANISM FOR PHOTOGRAPHIC CAMERAS, COMPRISING (A) A BORED LENS MOUNT, (B) A LENS BARREL REMOVABLY DISPOSED IN THE BORE OF SAID MOUNT AND HAVING A HELICAL GROOVE AROUND ITS PERIPHERY, (C) A FOCUSING RING ROTATABLE ON SAID MOUNT TO SURROUND SAID BARREL, AND (D) MEANS CONNECTING SAID FOCUSING RING TO SAID BARREL TO EFFECT AXIAL MOVEMENT OF SAID BARREL UPON ROTATION OF SAID FOCUSING RING COMPRISING A FIRST, NORMALLY-FLAT FLEXIBLE PLASTIC RING SECURED TO SAID FOCUSING RING TO SURROUND SAID BARREL AND TO ROTATE WITH SAID FOCUSING RING AND HAVING AN INTEGRAL, INTERNALLY-DISPOSED TAB TO ENGAGE IN SAID GROOVE, AND (E) MEANS FOR PREVENTING ROTATION OF SAID BARREL DURING ROTATION OF SAID RINGS.
Claim 2
Dependent Claim
115 words
A FOCUSING MECHANISM FOR PHOTOGRAPHIC CAMERAS, COMPRISING (A) A BORED LENS MOUNT, (B) A LENS BARREL REMOVABLY DISPOSED IN THE BORE OF SAID MOUNT AND HAVING A HELICAL GROOVE AROUND ITS PERIPHERY, (C) A FOCUSING RING ROTATABLE ON SAID MOUNT TO SURROUND SAID BARREL, AND (D) MEANS CONNECTING SAID FOCUSING RING TO SAID BARREL TO EFFECT AXIAL MOVEMENT OF SAID BARREL UPON ROTATION OF SAID FOCUSING RING COMPRISING A FIRST, NORMALLY-FLAT FLEXIBLE PLASTIC RING SECURED TO SAID FOCUSING RING TO SURROUND SAID BARREL AND TO ROTATE WITH SAID FOCUSING RING AND HAVING AN INTEGRAL, INTERNALLY-DISPOSED TAB TO ENGAGE IN SAID GROOVE, AND (E) MEANS FOR PREVENTING ROTATION OF SAID BARREL DURING ROTATION OF SAID RINGS.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |