US3836934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens assembly for photographing at near or close distance
Assignee: Minolta Co Ltd
•
Filing: 1973-11-29
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Granted: 1974-09-17
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Expires: 1993-11-29
Abstract
Abstract A finder parallax correction lens capable of giving a visual indication, a supplementary lens and a glass protector for the main taking lens are aligned in a planar arrangement and movably built in the camera. When the supplementary lens for photographing subjects at near or close distances is placed in front of the main taking lens with its optical axis in alignment with that of the taking lens, the correction lens is set in position for the finder optical system, visually indicating that it is so positioned, with the glass protector brought to its retracted position. A lock mechanism is further provided which permits the shutter to be tripped only when the lenses and glass protector are set in correct photographing positions respectively and which otherwise locks the shutter against tripping.
Inventors
- 👤 S Suzuki
- 👤 M Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:53
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/02; G03B17/00; G03B17/02; G03B17/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
A lens assembly in a camera for photographing subjects at near or close distances comprising: a finder parallax correction lens capable of giving a visual indication, a supplementary lens for photographing subjects at near or close distances, a glass protector for a main taking lens, a frame movably disposed in the camera main body and holding therein the finder parallax correction lens and the supplementary lens in such arrangement that when the supplementary lens is positioned in front of the main taking lens with their optical axes in alignment with each other, the finder parallax correction lens is positioned in front of the finder optical system with their optical axes in alignment with each other, the frame further holding the glass protector in planar relation to the finder parallax correction lens and the supplementary lens, and lock means for detecting the position of the frame to permit shutter tripping only when the glass protector and the combination of the finder parallax correction lens and the supplementary lens are set in correct photographing positions respectively.
Claim 2
Dependent Claim
174 words
A lens assembly in a camera for photographing subjects at near or close distances comprising: a finder parallax correction lens capable of giving a visual indication, a supplementary lens for photographing subjects at near or close distances, a glass protector for a main taking lens, a frame movably disposed in the camera main body and holding therein the finder parallax correction lens and the supplementary lens in such arrangement that when the supplementary lens is positioned in front of the main taking lens with their optical axes in alignment with each other, the finder parallax correction lens is positioned in front of the finder optical system with their optical axes in alignment with each other, the frame further holding the glass protector in planar relation to the finder parallax correction lens and the supplementary lens, and lock means for detecting the position of the frame to permit shutter tripping only when the glass protector and the combination of the finder parallax correction lens and the supplementary lens are set in correct photographing positions respectively.
Claim 3
Dependent Claim
22 words
The lens assembly as set forth in claim 1 wherein the finder parallax correction lens is colored to give the visual indication.
Claim 4
Dependent Claim
24 words
The lens assembly as set forth in claim 1 wherein the finder parallax correction lens bears characters marked thereon to give the visual indication.
Claim 5
Dependent Claim
28 words
The lens assembly as set forth in claim 1 wherein the finder parallax correction lens is colored in combination with characters marked thereon to give the visual indication.
Claim 6
Dependent Claim
57 words
The lens assembly as set forth in claim 1 wherein the lock means comprises a latch member operable to unlatch a release member only when the glass protector and the combination of the finder parallax correction lens and the supplementary lens are set in correct photographing positions respectively and to otherwise latch the release member against movement.
Claim 7
Dependent Claim
141 words
A lens assembly in a camera for photographing subjects at near or close distances comprising: a finder parallax correction lens capable of giving a visual indication, a supplementary lens for photographing subjects at near or close distances, a frame movably disposed in the camera main body and holding therein the finder parallax correction lens and the supplementary lens in such arrangement that when the supplementary lens is positioned in front of the main taking lens with their optical axes in alignment with each other, the finder parallax correction lens is positioned in front of the finder optical system with their optical axes in alignment with each other, and lock means for detecting the position of the frame to permit shutter tripping only when the combination of the finder parallax correction lens and the supplementary lens is set in correct photographing position.
Claim 8
Dependent Claim
141 words
A lens assembly in a camera for photographing subjects at near or close distances comprising: a finder parallax correction lens capable of giving a visual indication, a supplementary lens for photographing subjects at near or close distances, a frame movably disposed in the camera main body and holding therein the finder parallax correction lens and the supplementary lens in such arrangement that when the supplementary lens is positioned in front of the main taking lens with their optical axes in alignment with each other, the finder parallax correction lens is positioned in front of the finder optical system with their optical axes in alignment with each other, and lock means for detecting the position of the frame to permit shutter tripping only when the combination of the finder parallax correction lens and the supplementary lens is set in correct photographing position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |