US3738238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic apparatus with means for obstructing the passage of light through the viewfinder
Assignee: Robert Bosch Photokino GmbH
•
Filing: 1971-04-01
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Granted: 1973-06-12
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Expires: 1991-04-01
Abstract
Abstract The eyecup which surrounds the eyepiece of the viewfinder in a reflex camera has an elastic extension provided with a plug which can be fitted into an opening in the rear of the eyepiece to prevent entry of light into the viewfinder. The plug has a handgrip portion which can be grasped by fingers to facilitate its withdrawal from or insertion into the opening.
Inventors
- 👤 K Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:13
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18; G03B13/24; G03B13/26; G03B11/00; G03B11/04; G03B11/046
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
In a photographic apparatus, particularly in a reflex camera, a combination comprising a housing; a viewfinder provided in said housing and including a tubular mount and an eyepiece provided in said mount, said mount having an opening outwardly adjacent to said eyepiece; a light obstructing device movable to and from an operative position in which said light obstructing device is outwardly adjacent to said eyepiece and registers with said opening; and connecting means movably securing said light obstructing device to said housing, said connecting means comprising an eyecup at least partially surrounding said opening and including an elastic extension supporting said light obstructing device and being deformable to allow for movement of said light obstructing device to said operative position.
Claim 2
Dependent Claim
120 words
In a photographic apparatus, particularly in a reflex camera, a combination comprising a housing; a viewfinder provided in said housing and including a tubular mount and an eyepiece provided in said mount, said mount having an opening outwardly adjacent to said eyepiece; a light obstructing device movable to and from an operative position in which said light obstructing device is outwardly adjacent to said eyepiece and registers with said opening; and connecting means movably securing said light obstructing device to said housing, said connecting means comprising an eyecup at least partially surrounding said opening and including an elastic extension supporting said light obstructing device and being deformable to allow for movement of said light obstructing device to said operative position.
Claim 3
Dependent Claim
39 words
A combination as defined in claim 1, wherein said extension is integral with said light obstructing device and with said eyecup and said device comprises a plug which extends into said opening in the operative position of said device.
Claim 4
Dependent Claim
31 words
A combination as defined in claim 2, wherein said device further comprises a handgrip portion provided on said plug to facilitate manual insertion or withdrawal of said plug from said opening.
Claim 5
Dependent Claim
39 words
A combination as defined in claim 1, wherein said light obstructing device consists at least in part of elastomeric material and is frictionally held in said opening of said mount in the operative position of said light obstructing device.
Claim 6
Dependent Claim
19 words
A combination as defined in claim 1, wherein said connecting means and said light obstructing device consist of rubber.
References Cited (Backward Citations)
US3427943A
Cited
GB1188600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |