Patent CH318322A successfully refreshed from Google Patents.
US3138060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping means for variable focal length projector objective lens
Assignee: Voigtlander AG
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Filing: 1962-09-07
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Granted: 1964-06-23
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Expires: 1982-09-07
Abstract
No abstract record available.
Inventors
- 👤 Eggert Joachim
- 👤 Hofmeister Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:35
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A SLIDE PROJECTOR, AN OBJECTIVE OF THE TYPE HAVING A VARIABLE FOCAL LENGTH AND HAVING FOCAL LENGTH ADJUSTING MEANS; AN OBJECTIVE MOUNT; SAID OBJECTIVE BEING SUPPORTED IN SAID MOUNT FOR BODILY AXIAL ADJUSTMENT RELATIVE THERETO; AND CLAMPING MEANS OPERATIVELY ASSOCIATED WITH SAID OBJECTIVE AND SAID MOUNT AND SELECTIVELY OPERABLE TO LOCK SAID OBJECTIVE AGAINST BODILY AXIAL DISPLACEMENT RELATIVE TO SAID MOUNT, SAID CLAMPING MEANS INCLUDING A COLLET RING EMBRACING SAID OBJECTIVE AND HAVING ROTATABLE THREADED ENGAGEMENT WITH THE LATTER; SAID COLLET RING INCLUDING CIRCUMFERENTIALLY SPACED PROJECTING FINGERS ENGAGEABLE WITH AN INNER SURFACE OF SAID OBJECTIVE MOUNT.
Claim 2
Dependent Claim
97 words
IN A SLIDE PROJECTOR, AN OBJECTIVE OF THE TYPE HAVING A VARIABLE FOCAL LENGTH AND HAVING FOCAL LENGTH ADJUSTING MEANS; AN OBJECTIVE MOUNT; SAID OBJECTIVE BEING SUPPORTED IN SAID MOUNT FOR BODILY AXIAL ADJUSTMENT RELATIVE THERETO; AND CLAMPING MEANS OPERATIVELY ASSOCIATED WITH SAID OBJECTIVE AND SAID MOUNT AND SELECTIVELY OPERABLE TO LOCK SAID OBJECTIVE AGAINST BODILY AXIAL DISPLACEMENT RELATIVE TO SAID MOUNT, SAID CLAMPING MEANS INCLUDING A COLLET RING EMBRACING SAID OBJECTIVE AND HAVING ROTATABLE THREADED ENGAGEMENT WITH THE LATTER; SAID COLLET RING INCLUDING CIRCUMFERENTIALLY SPACED PROJECTING FINGERS ENGAGEABLE WITH AN INNER SURFACE OF SAID OBJECTIVE MOUNT.
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |