US4030113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera fitting
Assignee: Individual
•
Filing: 1975-09-19
•
Granted: 1977-06-14
•
Expires: 1995-09-19
Abstract
Abstract A camera fitting adapted to be interposed between the master lens and the body of a camera. The fitting permits the formation of close-up images. The fitting comprises a lens system mounted in a lens carrier. The lens carrier can reciprocate in a sleeve and there is means to determine the direction and extent of the reciprocation, and thus of the size of the image produced. At a first end of the fitting there is means to permit mounting of the fitting in place of the master lens of the camera. At a second end of the fitting there is means to permit mounting of said master lens in the fitting.
Inventors
- 👤 Christo Obreschkow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:14
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A lens containing converter adapted to be removably interposed between the standard master lens and the body of a single lens reflex camera to permit the formation of close-up images comprising; a lens system mounted in a lens carrier; a sleeve in which the lens carrier can reciprocate; means to determine the direction and extent of the reciprocation of the lens carrier within the sleeve and thus of the size of the image produced; means at a first end of the lens containing convertor to permit mounting of the lens containing convertor in place of the standard master lens of the camera; and means at a second end of the lens containing convertor to permit mounting of said standard master lens on the lens containing convertor.
Claim 2
Dependent Claim
126 words
A lens containing converter adapted to be removably interposed between the standard master lens and the body of a single lens reflex camera to permit the formation of close-up images comprising; a lens system mounted in a lens carrier; a sleeve in which the lens carrier can reciprocate; means to determine the direction and extent of the reciprocation of the lens carrier within the sleeve and thus of the size of the image produced; means at a first end of the lens containing convertor to permit mounting of the lens containing convertor in place of the standard master lens of the camera; and means at a second end of the lens containing convertor to permit mounting of said standard master lens on the lens containing convertor.
Claim 3
Dependent Claim
33 words
A lens containing convertor as claimed in claim 1 in which the lens system is a combination of lenses able to produce a magnification of 1:8.5 (M .114) to 1:375 X (M 1.375).
Claim 4
Dependent Claim
27 words
A lens containing converter as claimed in claim 2 in which the lens system contains four lenses and is the lens system available from a 2X teleconvertor.
Claim 5
Dependent Claim
84 words
A lens containing convertor as claimed in claim 1 in which the lens carrier is provided with an outwardly extending peg that engages in a slot formed in a first sleeve and in which the lens converter is provided with an external sleeve that engages with that part of the peg extending through the slot of the first sleeve, the external sleeve being formed with a helical groove that engages the peg whereby rotation of the second sleeve causes longitudinal reciprocation of the lens
Claim 6
Dependent Claim
63 words
A lens containing converter as claimed in claim 1 in which the means at the first end of the lens containing converter to permit mounting of the lens containing converter in place of the master lens of the camera is an externally threaded collar adapted to engage in the thread in the front of the camera body which normally receives the master lens.
Claim 7
Dependent Claim
51 words
A lens containing converter as claimd in claim 5 in which the means at the second end of the lens containing converter to permit mounting of said master lens on the lens containing converter is an internally threaded collar able to receive the thread of the master lens of the camera.
Claim 8
Dependent Claim
17 words
A lens containing convertor as claimed in claim 1 including a bracket to receive a flash unit.
Claim 9
Dependent Claim
18 words
A lens containing convertor as claimed in claim 7 in which the bracket can rotate around the fitting.
Claim 10
Dependent Claim
60 words
A lens containing convertor as claimed in claim 1 including means to couple with the existing diaphragm mechanism in the master lens and with the existing diaphragm actuating mechanism in the camera whereby movement of the actuating mechanism in the camera body causes actuation of the diaphragm mechanism in the master lens as though the lens converter were not present.
References Cited (Backward Citations)
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GB660865A
Cited
US2969008A
Cited
US3663093A
Cited
US3858225A
Cited
US3722390A
Cited
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Cited
US3852790A
Cited
US3915557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |