US4315679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adapter device
Assignee: Canon Inc
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Filing: 1979-09-27
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Granted: 1982-02-16
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Expires: 1999-09-27
Abstract
Abstract An adapter device for use with a versatile light adjusting flash illuminating device of the reflected light reception type or a slightly reformed flash illuminating device receives a light emission preparation signal of the flash illuminating device, for example, the charging completion signal of a main capacitor or a main switch ON signal and forms an exposure control signal for an exclusive camera. The adapter device is provided with a shoe for accommodating the leads of the flash unit and with a foot for connection with the leads of the exclusive camera.
Inventors
- 👤 Zenzo Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:41
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B2215/00; G03B2215/05; G03B2215/0514; G03B2215/056
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
91 words
An adapter device for use with a flash device and providing, through display means in a camera, a display for confirmation of light emission operation, comprising: (a) terminal means connectable with a flash circuit in the flash device for receiving a light emission signal generated upon flashlight emission operation of a flash tube; (b) signal forming circuit means connected to said terminal means and forming a confirmation signal in response to the light emission signal; and (c) terminal means for transmitting the confirmation signal to said display means in the camera.
Claim 2
Dependent Claim
91 words
An adapter device for use with a flash device and providing, through display means in a camera, a display for confirmation of light emission operation, comprising: (a) terminal means connectable with a flash circuit in the flash device for receiving a light emission signal generated upon flashlight emission operation of a flash tube; (b) signal forming circuit means connected to said terminal means and forming a confirmation signal in response to the light emission signal; and (c) terminal means for transmitting the confirmation signal to said display means in the camera.
Claim 3
Dependent Claim
49 words
An adapter device according to claim 1, wherein said signal forming means includes timer circuit means for generating an output for a period in response to the light emission signal, and output means for putting out the confirmation signal in response to the output from said timer circuit means.
Claim 4
Dependent Claim
165 words
A flash photography system for use with a camera having display circuit means, for performing flash photography, comprising: (A) a flash device having: (a) flash means; (b) accumulating means for accumulating flash energy; (c) completion signal forming circuit means for producing a completion signal when the flash energy accumulated by said accumulating means reaches a predetermined level; and (d) circuit means connected to said flash means to detect the operation state of said flash means and produce a flash signal in response to the operation of said flash means; and (B) an adapter device having: (a) control circuit means for forming a first display signal in response to the completion signal and a second display signal in response to the flash signal, said control circuit means including timer circuit means for forming the second signal for a predetermined time period in response to the flash signal; and (b) terminal means for transmitting the first and second signals to said display circuit means in the camera.
Claim 5
Dependent Claim
165 words
A flash photography system for use with a camera having display circuit means, for performing flash photography, comprising: (A) a flash device having: (a) flash means; (b) accumulating means for accumulating flash energy; (c) completion signal forming circuit means for producing a completion signal when the flash energy accumulated by said accumulating means reaches a predetermined level; and (d) circuit means connected to said flash means to detect the operation state of said flash means and produce a flash signal in response to the operation of said flash means; and (B) an adapter device having: (a) control circuit means for forming a first display signal in response to the completion signal and a second display signal in response to the flash signal, said control circuit means including timer circuit means for forming the second signal for a predetermined time period in response to the flash signal; and (b) terminal means for transmitting the first and second signals to said display circuit means in the camera.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |