US3710706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm-actuating device for a camera
Assignee: Canon Inc
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Filing: 1970-09-16
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Granted: 1973-01-16
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Expires: 1990-09-16
Abstract
Abstract A diaphragm-actuating interlocking mechanism in an automatic stop device for a camera includes a rotatable ring mounted at the base of a body tube and operatively associated with an operating mechanism provided in a camera body, and an interlocking arm formed integrally with said rotatable ring and engaging an interlocking pin extended from an aperture ring to thereby open and close a diaphragm upon rotation of said rotatable ring. The interlocking arm includes a slide arm disposed thereon for axial sliding movement with respect to the interlocking arm so that the engagement between the interlocking arm and the interlocking pin takes place via the slide arm, and that the slide arm is axially movable in accordance with the axial movement of the lens tube. Any incorrect stop opening or any time delay of operation can be avoided effectively and the body tube can be made compact.
Inventors
- 👤 N Sanada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:45
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A diaphragm-actuating interlocking mechanism in an automatic aperture stop device for a camera, comprising a ring rotatably mounted at the base of a body tube for joining a lens assembly to a camera body, said ring being arranged for operative association with an operating mechanism in said camera body, a lens tube telescopingly interfitted with said body tube, said lens assembly being carried by said lens tube and including a diaphragm controlled by an aperture ring, an interlocking arm formed integrally with said rotatable ring and projecting through said body tube toward said aperture ring, a slide arm joined to said interlocking arm for relative sliding axial movement, said slide arm engaging an interlocking pin projecting from one side of said aperture ring for opening and closing said diaphragm responsive to rotation of said rotatable ring, and means interconnecting said lens tube with said slide arm for joint axial movement relative to said interlocking arm.
Claim 2
Dependent Claim
155 words
A diaphragm-actuating interlocking mechanism in an automatic aperture stop device for a camera, comprising a ring rotatably mounted at the base of a body tube for joining a lens assembly to a camera body, said ring being arranged for operative association with an operating mechanism in said camera body, a lens tube telescopingly interfitted with said body tube, said lens assembly being carried by said lens tube and including a diaphragm controlled by an aperture ring, an interlocking arm formed integrally with said rotatable ring and projecting through said body tube toward said aperture ring, a slide arm joined to said interlocking arm for relative sliding axial movement, said slide arm engaging an interlocking pin projecting from one side of said aperture ring for opening and closing said diaphragm responsive to rotation of said rotatable ring, and means interconnecting said lens tube with said slide arm for joint axial movement relative to said interlocking arm.
Claim 3
Dependent Claim
54 words
A diaphragm-actuating interlocking mechanism according to claim 1, wherein said interlocking arm has at least two guide pins studded therein and said slide arm has an elongated slot formed therethrough for receiving said guide pins, whereby said guide pins and said elongated slot cooperate together to permit the axial movement of said slide arm.
Claim 4
Dependent Claim
39 words
A diaphragm-actuating interlocking mechanism as defined in claim 1, wherein said lens tube has opposite shoulder means formed circumferentially thereof for confining said slide arm therebetween to thereby permit said slide arm to be moved with said lens tube.
Claim 5
Dependent Claim
34 words
A diaphragm-actuating interlocking mechanism as defined in claim 5, wherein said interlocking pin of said aperture ring has a short length only long enough to engage the closely adjacent end of said slide arm.
References Cited (Backward Citations)
FR1285734A
Cited
US3211070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |