US3777640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote indicator for diaphragm setting or the like
Assignee: Jos Schneider Optische Werke GmbH
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Filing: 1972-06-02
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Granted: 1973-12-11
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Expires: 1992-06-02
Abstract
Abstract A photographic objective, used for reproduction purposes in a darkroom, has an iris diaphragm whose control ring is mechanically coupled with a movable arm sweeping a contact arc inside the camera; the setting of the diaphragm can be read on an external indicator, connected to the contact arc and the arm through a cable, which includes a light box emitting filtered light to which the copying paper is insensitive. The contact arc, which may be a set of bank contacts or a continuous resistance, is carried on an insulating plate which may be removably seated in a slot of the camera housing with a plug-in connection.
Inventors
- 👤 K Holderbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:31
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/128; G03B9/00; G03B9/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
In a camera equipped with an adjustable component inside a housing, the combination therewith of a control element for said component in said housing, a conductive member mechanically coupled with said control element for displacement thereby in said housing, a dielectric plate, detachable mounting means for removably seating said plate in said housing, contact means positioned on said plate for engagement by said member, indicating means remote from said housing, and wire means electrically connecting said member and said contact means to said indicating means for registering the position of said member.
Claim 2
Dependent Claim
92 words
In a camera equipped with an adjustable component inside a housing, the combination therewith of a control element for said component in said housing, a conductive member mechanically coupled with said control element for displacement thereby in said housing, a dielectric plate, detachable mounting means for removably seating said plate in said housing, contact means positioned on said plate for engagement by said member, indicating means remote from said housing, and wire means electrically connecting said member and said contact means to said indicating means for registering the position of said member.
Claim 3
Dependent Claim
30 words
The combination defined in claim 1 wherein said control element is a ring centered on an optical axis, said contact means being disposed in an arc coaxial with said ring.
Claim 4
Dependent Claim
46 words
The combination defined in claim 1 wherein said housing forms a seat for said plate, said seat and said plate being provided with mating connector means for completing a circuit through said wire means to said indicator means upon insertion of said plate into said housing.
Claim 5
Dependent Claim
115 words
In a camera equipped with an adjustable component inside a housing, the combination therewith of a control element for said component in said housing, a conductive member mechanically coupled with said control element for displacement thereby in said housing, contact means positioned for engagement by said member, a carrier for said contact means in said housing, indicator means remote from said housing, and wire means electrically connecting said member and said contact means to said indicator means for registering the position of said member; said adjustable component being a diaphragm with a plurality of discrete stop positions, said contact means comprising a set of bank contacts respectively engageable by said member in said stop positions.
Claim 6
Dependent Claim
115 words
In a camera equipped with an adjustable component inside a housing, the combination therewith of a control element for said component in said housing, a conductive member mechanically coupled with said control element for displacement thereby in said housing, contact means positioned for engagement by said member, a carrier for said contact means in said housing, indicator means remote from said housing, and wire means electrically connecting said member and said contact means to said indicator means for registering the position of said member; said adjustable component being a diaphragm with a plurality of discrete stop positions, said contact means comprising a set of bank contacts respectively engageable by said member in said stop positions.
Claim 7
Dependent Claim
18 words
The combination defined in claim 4 wherein said carrier is a dielectric plate removably seated in said housing.
Claim 8
Dependent Claim
18 words
The coMbination defined in claim 5 wherein said housing is provided with a detachable mounting for said plate.
Claim 9
Dependent Claim
37 words
The combination defined in claim 4 wherein said indicator means comprises a plurality of light sources individually connected to said bank contacts, said member having an extremity wide enough to bridge adjoining bank contacts in intermediate positions.
Claim 10
Dependent Claim
27 words
The combination defined in claim 4 wherein said contact means comprises a continuous resistance, said indicator means including impedance means complementing said resistance to a bridge circuit.
Claim 11
Dependent Claim
136 words
In a camera equipped with an adjustable component inside a housing, the combination therewith of a control element for said component in said housing, a conductive member mechanically coupled with said control element for displacement thereby in said housing, contact means positioned for engagement by said member, a carrier for said contact means in said housing, indicator means remote from said housing, and wire means electrically connecting said member and said contact means to said indicator means for registering the position of said member; said indicator means comprising a light box with a support for numerical indicia, at least one window for displaying said indicia, at least one source of light for illuminating said indicia, and filter means for substantially preventing light emission from said box having wavelengths optically affecting photosensitive material utilized with the camera.
Claim 12
Dependent Claim
136 words
In a camera equipped with an adjustable component inside a housing, the combination therewith of a control element for said component in said housing, a conductive member mechanically coupled with said control element for displacement thereby in said housing, contact means positioned for engagement by said member, a carrier for said contact means in said housing, indicator means remote from said housing, and wire means electrically connecting said member and said contact means to said indicator means for registering the position of said member; said indicator means comprising a light box with a support for numerical indicia, at least one window for displaying said indicia, at least one source of light for illuminating said indicia, and filter means for substantially preventing light emission from said box having wavelengths optically affecting photosensitive material utilized with the camera.
Claim 13
Dependent Claim
21 words
The combination defined in claim 9 wherein said support comprises a removable strip positioned for translumination by light from said source.
References Cited (Backward Citations)
US3518927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |