US5237357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperture and focus adjusting device for a camera
Assignee: Pentax Corp
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Filing: 1992-03-06
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Granted: 1993-08-17
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Expires: 2012-03-06
Abstract
Abstract An aperture and focus adjusting device for a camera, is provided with only one reversible motor, a first adjusting mechanism, and a second adjusting mechanism. The first adjusting mechanism is rotated by a first member which is connected to the motor, and the second adjusting mechanism is rotated by a second member to which an intermediate rotational member is connected. The intermediate rotational member is in constant mesh and is rotated with the second member, and is engaged with the first member only within a sector of a rotational range of the first member, to rotate together with the first member. One of the first and second mechanisms is a focus adjusting mechanism, and the other is an aperture adjusting mechanism.
Inventors
- 👤 Tahei Morisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:19
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G03; G03B; G03B3/00; G03B3/10; G03B7/00; G03B7/08; G03B7/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
An aperture adjusting device for a camera comprising: a rotatable aperture adjusting plate, an aperture adjusting mechanism controlling the value of aperture in accordance with a rotation angle of said aperture adjusting plate, and a reversible motor rotating to move said aperture adjusting plate frontward and rearward, said reversible motor being coaxially disposed about an optical axis of the aperture device, said reversible motor constantly holding said aperture adjusting plate a closed position, and rotating said aperture adjusting plate, in accordance with a release signal, from said closed position to a rotation position corresponding to an aperture value determined by a photometer, said aperture adjusting plate remaining at the position corresponding to an aperture value determined by a photometer, during operation of a shutter.
Claim 2
Dependent Claim
124 words
An aperture adjusting device for a camera comprising: a rotatable aperture adjusting plate, an aperture adjusting mechanism controlling the value of aperture in accordance with a rotation angle of said aperture adjusting plate, and a reversible motor rotating to move said aperture adjusting plate frontward and rearward, said reversible motor being coaxially disposed about an optical axis of the aperture device, said reversible motor constantly holding said aperture adjusting plate a closed position, and rotating said aperture adjusting plate, in accordance with a release signal, from said closed position to a rotation position corresponding to an aperture value determined by a photometer, said aperture adjusting plate remaining at the position corresponding to an aperture value determined by a photometer, during operation of a shutter.
Claim 3
Dependent Claim
31 words
An aperture adjusting device for a camera according to claim 1, wherein said reversible motor rotates said aperture adjusting plate to said closed position after completion of a shutter release operation.
Claim 4
Dependent Claim
43 words
The aperture adjusting device for a camera according to claim 1, wherein said reversible motor is a step motor having a cylindrical rotor, the rotation axis of said cylindrical rotor being aligned with the optical axis of a photographing lens of the camera.
Claim 5
Dependent Claim
38 words
The aperture adjusting device for a camera according to claim 1, wherein the photographing lens has a front lens group and a rear lens group, said reversible motor being positioned on an outer periphery of said rear lens.
Claim 6
Dependent Claim
40 words
The aperture adjusting device for a camera according to claim 4, wherein said photographing lens is a zoom lens in which a focal length lens is changed in accordance with a change in position of front and rear lens groups.
Claim 7
Dependent Claim
46 words
The aperture adjusting device for a camera according to claim 1, further comprising means for positioning said aperture adjustment mechanism at a position corresponding to a fully opened aperture position prior to positioning said aperture adjusting mechanism at a position corresponding to a selected aperture position.
Claim 8
Dependent Claim
24 words
The aperture adjusting device for a camera according to claim 1, further including means for locking said aperture adjusting plate in a predetermined position.
Claim 9
Dependent Claim
26 words
The aperture adjusting device for a camera according to claim 1, further comprising an intermediate rotation member between said reversible motor and said aperture adjusting plate.
Claim 10
Dependent Claim
21 words
The aperture adjusting device for a camera according to claim 1, wherein said closed position is an aperture closed down position.
References Cited (Backward Citations)
US4005448A
Cited
JPS60235126A
Cited
US4696559A
Cited
US4779114A
Cited
US4695144A
Cited
US5060000A
Cited
US4868596A
Cited
US4975725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |