US4870436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Close-up photographing device
Assignee: Minolta Co Ltd
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Filing: 1988-02-02
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Granted: 1989-09-26
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Expires: 2008-02-02
Abstract
Abstract A close-up photographing device wherein, once a focused or a near focused condition is reached, it can be maintained irrespective of changing of the photographing magnification, and a photographing procedure can be simplified. The device includes first and second mounting members having a photographing optical system and a film mounted thereon, respectively, a third mounting member on which the first and second mounting members are mounted for movement in a direction of the optical axis of the optical system, and a manually operable magnification changing member having first and second means for controlling movement of the first and second mounting members, respectively, relative to the third mounting member. By manual operation of the magnification changing member, the first and second mounting members are moved simultaneously relative to the third mounting member to change the magnification while maintaining a focused condition or a near focused condition.
Inventors
- 👤 Osamu Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:06
CPC Classifications
G; G03; G03B; G03B3/00; G03B3/02; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/08; G03B17/00; G03B17/02; G03B17/04; G03B17/045
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
227 words
A close-up photographing device, comprising: a first mounting member for mounting a photographing optical system thereon including means for providing a fine focusing function to enable the operator to achieve a final focus condition from a near focus condition; a second mounting member for mounting thereon a record face providing element having a record face on which an image of an object is to be recorded; a third mounting member for mounting thereon said first and second mounting members for movement in a direction of the optical axis of said optical system and in a separated relationship from the object; a manually operable magnification changing member having formed thereon a first cam groove for controlling movement of said first mounting member relative to said third mounting member and a second cam groove for controlling movement of said second mounting member relative to said third mounting member, said first and second cam grooves being so shaped as to allow changing of the photographing magnification while maintaining a focused condition or a near focused condition wherein an image of the object can be confirmed on said record face, and a holding means for holding thereon said first mounting member, said second mounting member, said third mounting member and said manually operable magnification changing member to provide a complete assembly of said device independent of an object to be photographed.
Claim 2
Dependent Claim
227 words
A close-up photographing device, comprising: a first mounting member for mounting a photographing optical system thereon including means for providing a fine focusing function to enable the operator to achieve a final focus condition from a near focus condition; a second mounting member for mounting thereon a record face providing element having a record face on which an image of an object is to be recorded; a third mounting member for mounting thereon said first and second mounting members for movement in a direction of the optical axis of said optical system and in a separated relationship from the object; a manually operable magnification changing member having formed thereon a first cam groove for controlling movement of said first mounting member relative to said third mounting member and a second cam groove for controlling movement of said second mounting member relative to said third mounting member, said first and second cam grooves being so shaped as to allow changing of the photographing magnification while maintaining a focused condition or a near focused condition wherein an image of the object can be confirmed on said record face, and a holding means for holding thereon said first mounting member, said second mounting member, said third mounting member and said manually operable magnification changing member to provide a complete assembly of said device independent of an object to be photographed.
Claim 3
Dependent Claim
56 words
A close-up photographing device as claimed in claim 2, wherein said record face providing element is a film contained in a camera body which is removably mounted on said second mounting member, and said fine focusing mechanism is automatically driven in response to an output of a focused condition detecting device installed in said camera body.
Claim 4
Dependent Claim
202 words
A close-up photographing device, comprising: a first mounting member for mounting a photographing optical system thereon including means for providing a fine focusing function to enable the operator to achieve a final focus condition from a near focus condition; a second mounting member for mounting thereon a record face providing element having a record face on which an image of an object is to be recorded; a third mounting member for mounting thereon said first and second mounting members for movement in a direction of the optical axis of said optical system; a manually operable magnification changing member for causing changing of the photographing magnification while maintaining a focused condition or a near focused condition wherein an image of the object can be confirmed on said record face, said magnification changing member including a first gear for controlling movement of said first mounting member relative to said third mounting member and a second mounting member relative to said third mounting member, and a holding means for holding thereon said first mounting member, said second mounting member, said third mounting member and said manually operable magnification changing member to provide a complete assembly of said device independent of an object to be photographed.
Claim 5
Dependent Claim
202 words
A close-up photographing device, comprising: a first mounting member for mounting a photographing optical system thereon including means for providing a fine focusing function to enable the operator to achieve a final focus condition from a near focus condition; a second mounting member for mounting thereon a record face providing element having a record face on which an image of an object is to be recorded; a third mounting member for mounting thereon said first and second mounting members for movement in a direction of the optical axis of said optical system; a manually operable magnification changing member for causing changing of the photographing magnification while maintaining a focused condition or a near focused condition wherein an image of the object can be confirmed on said record face, said magnification changing member including a first gear for controlling movement of said first mounting member relative to said third mounting member and a second mounting member relative to said third mounting member, and a holding means for holding thereon said first mounting member, said second mounting member, said third mounting member and said manually operable magnification changing member to provide a complete assembly of said device independent of an object to be photographed.
Claim 6
Dependent Claim
198 words
A close-up photographing lens assembly, comprising: a first mounting member for mounting a photographing optical system thereon including means for providing a fine focusing function to enable the operator to achieve a final focus condition from a near focus condition; a second mounting member for mounting thereon a film member to record an image of an object; a third mounting member for mounting thereon said first and second mounting members for movement along an optical axis of said optical system, an operable magnification changing member having formed thereon a first member for controlling movement of said first mounting member relative to said third mounting member and a second member for controlling movement of said second mounting member relative to said third mounting member, said first and second members allowing changing of the photographing magnification while maintaining a focused condition or a near focused condition wherein an image of the object can be recorded on said film member, and a holding means for holding thereon said first mounting member, said second mounting member, said third mounting member and said manually operable magnification changing member to provide a complete assembly of said device independent of an object to be photographed.
Claim 7
Dependent Claim
198 words
A close-up photographing lens assembly, comprising: a first mounting member for mounting a photographing optical system thereon including means for providing a fine focusing function to enable the operator to achieve a final focus condition from a near focus condition; a second mounting member for mounting thereon a film member to record an image of an object; a third mounting member for mounting thereon said first and second mounting members for movement along an optical axis of said optical system, an operable magnification changing member having formed thereon a first member for controlling movement of said first mounting member relative to said third mounting member and a second member for controlling movement of said second mounting member relative to said third mounting member, said first and second members allowing changing of the photographing magnification while maintaining a focused condition or a near focused condition wherein an image of the object can be recorded on said film member, and a holding means for holding thereon said first mounting member, said second mounting member, said third mounting member and said manually operable magnification changing member to provide a complete assembly of said device independent of an object to be photographed.
References Cited (Backward Citations)
US3408145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |