US4213686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closeup focusing mechanism for an objective of long focal length
Assignee: Individual
•
Filing: 1979-07-12
•
Granted: 1980-07-22
•
Expires: 1999-07-12
Abstract
Abstract In a closeup focusing mechanism for objectives of long focal length, a tube carried between the objective housing and a camera mounting means telescopes into and out of the objective housing. The camera mounting means carries an axially extending rod externally of the tube which is guided in a guide carried by the objective housing. Thus the tube does not rotate relative to the housing.
Inventors
- 👤 Ferdinand Kellner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:29
CPC Classifications
G; G03; G03B; G03B3/00; G03B3/02; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B7/105
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A closeup focusing mechanism for a long-focal-length objective comprising an objective housing, means for mounting the objective to a camera, a tube between the objective housing and the camera mounting means, the tube being slidable into and out of the objective housing, a guide rod attached to the camera mounting means and extending towards the objective housing externally of the tube, and a guide for said rod on the objective housing.
Claim 2
Dependent Claim
71 words
A closeup focusing mechanism for a long-focal-length objective comprising an objective housing, means for mounting the objective to a camera, a tube between the objective housing and the camera mounting means, the tube being slidable into and out of the objective housing, a guide rod attached to the camera mounting means and extending towards the objective housing externally of the tube, and a guide for said rod on the objective housing.
Claim 3
Dependent Claim
20 words
A closeup focusing mechanism according to claim 1 including a set screw for fixing the guide rod in the guide.
Claim 4
Dependent Claim
43 words
A closeup focusing mechanism according to claim 2 and including an operating grip associated with said housing, said set screw being located on one side of said grip and said guide rod and guide being located on the other side of said grip.
Claim 5
Dependent Claim
34 words
A closeup focusing mechanism according to claim 1 or claim 2 including an operating grip associated with said housing and the guide rod being positioned adjacent the junction between said housing and said grip.
References Cited (Backward Citations)
US1637529A
Cited
CH325486A
Cited
DE1033503B
Cited
US3045550A
Cited
DE1217197B
Cited
DE1280659B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-22 | 1984-01-21 | 1984-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-22 | 1988-01-21 | 1988-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-22 | 1992-01-21 | 1992-07-22 | $7700.00 | Window Closed / Lapsed |