US4268141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-detection adapter for an automatic flash device
Assignee: West Electric Co Ltd
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Filing: 1979-11-09
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Granted: 1981-05-19
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Expires: 1999-11-09
Abstract
Abstract A photo-detection adapter for an automatic strobe comprising a mounting means attachable to a barrel of a photographic lens, an external photo-detection part supported by the mounting means so as to change a detection direction for properly receiving a reflection light from a photographic object, a light conduction means for conducting the reflection light from the photographic object to a photo-detection element disposed in the strobe, and a coupling means for holding the output end of the light conduction means so as to face to the photo-detection element in the strobe.
Inventors
- 👤 Ryutaro Mori
- 👤 Akira Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:52
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
A photo-detection adapter for a strobe comprising a light conduction means for conducting light therethrough, a mounting means attachable to a barrel of a photographic lens, an external photo-detection means in which an input end of said light conduction means is disposed and which is movably supported by said mounting means, said external photo-detection means being for receiving a reflection light from a photographic object at said input end, and a coupling means for holding an output end of said light conduction means in front of a photo-detector of an automatic strobe thereby to give output light conducted through said light conduction means to said photo-detector.
Claim 2
Dependent Claim
106 words
A photo-detection adapter for a strobe comprising a light conduction means for conducting light therethrough, a mounting means attachable to a barrel of a photographic lens, an external photo-detection means in which an input end of said light conduction means is disposed and which is movably supported by said mounting means, said external photo-detection means being for receiving a reflection light from a photographic object at said input end, and a coupling means for holding an output end of said light conduction means in front of a photo-detector of an automatic strobe thereby to give output light conducted through said light conduction means to said photo-detector.
Claim 3
Dependent Claim
81 words
A photo-detection adapter for a strobe in accordance with claim 1, wherein said mounting means comprises a first holding means for rotatably holding said external photo-detection means, a second holding means having a screw thread of a pitch to fit the thread of a barrel of said photographic lens, said second holding means rotatably holding said first holding means, and a spring for producing a pressing force between said first holding means and said second holding means to pinch said barrel.
Claim 4
Dependent Claim
29 words
A photo-detection adapter for a strobe in accordance with claim 1, wherein said mounting means is a ring having a screw thread to fit said thread of said barrel.
Claim 5
Dependent Claim
52 words
A photo-detection adapter for a strobe in accordance with claim 1, wherein said coupling means has a connecting means which has a ring of rubber band to be set around said strobe and on which said output end of said light conducting means is disposed in a manner to face said photo-detector.
Claim 6
Dependent Claim
60 words
A photo-detection adapter for a strobe in accordance with claim 1, wherein said coupling means has a connecting means which has a fastening band of a non-eleastic material and has a length-adjusting buckle for tightly being set around said strobe and on which said output end of said light conducting means is disposed in a manner to face said photo-detector.
Claim 7
Dependent Claim
47 words
A photo-detection adapter for a strobe in accordance with claim 1, wherein said coupling means has a holding plate to hold said output end of said light conduction means and a detachable bonding film detachably to bond said holding plate on a front face of said strobe.
Claim 8
Dependent Claim
59 words
A photo-detection adapter for a strobe in accordance with either one of claim 1 to 3, wherein said coupling means comprises a mechanical coupler which has a projection to be inserted in and fit a recess wherein said photo-detector of the automatic strobe is disposed, said output end of said light conduction means being coaxially disposed in said projection.
Claim 9
Dependent Claim
30 words
A photo-detection adapter for a strobe in accordance with either one of claims 1 to 6 wherein said light conduction means is a cable comprising a bunch of optical fibers.
Claim 10
Dependent Claim
25 words
A photo-detection adapter for a stobe in accordance with claim 7 wherein said light conduction means is a cable comprising a bunch of optical fibers.
Claim 11
Dependent Claim
42 words
A photo-detection adapter for a strobe in accordance with either one of claims 1 to 6, which further has an adjustable light stop to adjust an amount of a light to be transmitted from said external photo-detection means to said coupling means.
Claim 12
Dependent Claim
37 words
A photo-detection adapter for a strobe in accordance with claim 7, which further has an adjustable light stop to adjust an amount of a light to be transmitted from said external photo-detection means to said coupling means.
Claim 13
Dependent Claim
37 words
A photo-detection adapter for a strobe in accordance with claim 8, which further has an adjustable light stop to adjust an amount of a light to be transmitted from said external photo-detection means to said coupling means.
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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) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |