US4251147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic flash with calculator
Assignee: Nikon Corp
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Filing: 1979-04-19
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Granted: 1981-02-17
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Expires: 1999-04-19
Abstract
Abstract A speed-light, or electronic flash, having a support column provided between its light flashing part and its fitting member to be fitted with an accessory shoe of a camera body, wherein an exposure calculator device operable by a guide number is in cylindrical form so as to surround or enclose the support column.
Inventors
- 👤 Shiro Sugimori
- 👤 Tetsuro Goto
- 👤 Sumiko Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:55
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
In a camera system having a camera body including a mounting section and an operating dial which can be rotated to a predtermined position corresponding to the sensitivity of film to be loaded in the camera body and fixed at the predetermined position; and an electronic flash device including a housing and a support member with a mounting section capable of being engaged with the mounting section of the camera body and a calculating for calculating a flash photography value dependent upon the film sensitivity; the improvement which comprises means dependent upon the engagement of said mounting sections for transferring to said calculator a film sensitivity signal from said camera body determined by said predetermined position of said operating dial.
Claim 2
Dependent Claim
120 words
In a camera system having a camera body including a mounting section and an operating dial which can be rotated to a predtermined position corresponding to the sensitivity of film to be loaded in the camera body and fixed at the predetermined position; and an electronic flash device including a housing and a support member with a mounting section capable of being engaged with the mounting section of the camera body and a calculating for calculating a flash photography value dependent upon the film sensitivity; the improvement which comprises means dependent upon the engagement of said mounting sections for transferring to said calculator a film sensitivity signal from said camera body determined by said predetermined position of said operating dial.
Claim 3
Dependent Claim
34 words
The improvement of claim 1, wherein said signal transferring means comprises a rotatable member on said support member and a signal member on said dial for setting the rotational position of said rotatable member.
Claim 4
Dependent Claim
16 words
The improvement of claim 2, wherein said rotatable member has means for displaying film sensitivity values.
Claim 5
Dependent Claim
41 words
The improvement of claim 2, wherein said dial is an annulus surrounding said mounting section on said camera body, and said rotatable member is an annulus surrounding said support member and coaxial with said dial when said mounting section are engaged.
Claim 6
Dependent Claim
29 words
The improvement of claim 4, wherein said rotatable member has an interlocking member engageable with said signal member of said dial to set the position of said rotatable member.
Claim 7
Dependent Claim
40 words
The improvement of claim 5, wherein said calculator has means for holding said interlocking member away from said signal member until said mounting sections are engaged and means for thereafter moving said interlocking member into engagement with said signal member.
Claim 8
Dependent Claim
38 words
The improvement of claim 6, wherein said moving means comprises a spring and said holding means comprises a part rotatable about said support member and having an element against which said interlocking member is biased by said spring.
Claim 9
Dependent Claim
54 words
The improvement of claim 7, wherein said rotatable part comprises a cylinder cover for said mounting sections having means for permitting said mountng sections to be engaged and for thereafter holding said mounting sections engaged upon rotation of said cover, to rotation of said cover permitting said interlocking member to engage said signal member.
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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |