US3682069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable lenses camera mounting
Assignee: Eclair International SA
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Filing: 1970-05-19
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Granted: 1972-08-08
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Expires: 1990-05-19
Abstract
Abstract A lens mount for a camera comprises an annular mounting member secured to the camera case and having an internally threaded aperture to receive a lens, an externally threaded rim portion and a plane front reference face. A mount for a heavier or larger lens, for example a zoom lens, comprises a flanged sleeve to receive the lens, an annular intermediate member in which the sleeve is secured and a fastening ring which is secured to the intermediate member by a centering and bearing member in such manner that the fastening ring is rotatable on the intermediate member and is axially slidable within limits. The fastening ring has an internally threaded inner end portion which screws onto the externally threaded rim of the mounting member to press the centering and bearing member tightly against the reference face of the mounting member.
Inventors
- 👤 Jacques Lecoeur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:24
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
In a camera having a case with an opening, a lens mount comprising an annular lens mounting member secured in said opening, said member having an internally threaded lens receiving aperture, an externally threaded outer rim portion and a plane annular reference face between said aperture and rim, a fastening ring having an internally threaded inner end portion mating with said externally threaded outer rim portion and an inwardly projecting rib spaced from said threaded end, an annular intermediate member received in said fastening ring and having a shoulder engageable with said rib, a flanged sleeve member received in said intermediate member and a centering and bearing member secured to an inner end of said intermediate member and having a shoulder engageable with said inwardly projecting rib to retain said fastening ring rotatably on said intermediate member, said fastening ring being screwed onto said externally threaded outer rim portion of said mounting member to press said centering and bearing ring against said plane reference face of said mounting member.
Claim 2
Dependent Claim
169 words
In a camera having a case with an opening, a lens mount comprising an annular lens mounting member secured in said opening, said member having an internally threaded lens receiving aperture, an externally threaded outer rim portion and a plane annular reference face between said aperture and rim, a fastening ring having an internally threaded inner end portion mating with said externally threaded outer rim portion and an inwardly projecting rib spaced from said threaded end, an annular intermediate member received in said fastening ring and having a shoulder engageable with said rib, a flanged sleeve member received in said intermediate member and a centering and bearing member secured to an inner end of said intermediate member and having a shoulder engageable with said inwardly projecting rib to retain said fastening ring rotatably on said intermediate member, said fastening ring being screwed onto said externally threaded outer rim portion of said mounting member to press said centering and bearing ring against said plane reference face of said mounting member.
Claim 3
Dependent Claim
30 words
A lens mount according to claim 1, in which the diameter of said externally threaded rim portion of said mounting member is approximately twice that of said internally threaded aperture.
Claim 4
Dependent Claim
62 words
A lens mount according to claim 1, in which said rim portion of said mounting member comprises a raised annular rim projecting axially outwardly from the plane of said reference face and in which said centering and bearing member has a reduced end portion that fits inside said raised rim to center said centering and bearing member relative to said mounting member.
Claim 5
Dependent Claim
44 words
A lens mount according to claim 3, in which said intermediate member has a reduced inner end portion that fits in said reduced inner end portion of said centering and bearing member to center said intermediate member relative to said centering and bearing member.
Claim 6
Dependent Claim
42 words
A lens mount according to claim 3, in which said centering and bearing member has an axially projecting stud and said mounting member has a socket receiving said stud to position said centering and bearing member angularly relative to said mounting member.
Claim 7
Dependent Claim
45 words
A lens mount according to claim 1, in which said flanged sleeve member has an inwardly extending flange at its inner end and an outwardly projecting flange at its outer end extending out over an outer end portion of said intermediate member and secured thereto.
Claim 8
Dependent Claim
60 words
A lens mount according to claim 1, in which the axial distance between said shoulder of said intermediate member and said shoulder of said centering and bearing member is greater than the axial dimension of said inwardly projecting rib of said fastening ring, whereby said fastening ring is slidable axially of said intermediate member within limits set by said shoulders.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |