US4276579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic flash device
Assignee: West Electric Co Ltd
•
Filing: 1979-03-29
•
Granted: 1981-06-30
•
Expires: 1999-03-29
Abstract
Abstract In a photographic exposure device of the type comprising a flash section comprising a flash tube which flashes by the energy charged on a main discharge capacitor and a reflector, and a flash light emission angle variable mechanism capable of varying the flash light emission angle by changing the position from said flash section, an exposure data section on which are displayed an aperture, a film sensitivity or speed, a distance to a subject and other useful data for photography is connected to said flash light emission angle variable mechanism by a connecting mechanism in such a way that when the flash light emission angle is made variable by said flash light emission angle variable mechanism the exposure data displays may be changed.
Inventors
- 👤 Hikoya Yako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:56
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
168 words
A photographic flash device having a flash section comprising a flash tube which flashes by means of the energy charged on a main discharge capacitor and a reflector, a flash light emission angle variable mechanism which has a single transparent panel and which can vary the flash light emission angle by changing the distance of said panel from said flash tube, a flash light emission angle display coupled to and controlled by said flash light emission angle variable mechanism, an exposure information section upon which are displayed aperture, film speed, and distance to a subject, and a connecting mechanism which interconnects said flash light emission angle variable mechanism and said exposure data section so that the displays of said exposure data section may be varied when the flash light emission angle is varied by means of said flash light emission angle variable mechanism, whereby the operation of said flash light emission angle variable mechanism correspondingly varies the display of the flash light emission angle and the exposure information.
Claim 2
Dependent Claim
168 words
A photographic flash device having a flash section comprising a flash tube which flashes by means of the energy charged on a main discharge capacitor and a reflector, a flash light emission angle variable mechanism which has a single transparent panel and which can vary the flash light emission angle by changing the distance of said panel from said flash tube, a flash light emission angle display coupled to and controlled by said flash light emission angle variable mechanism, an exposure information section upon which are displayed aperture, film speed, and distance to a subject, and a connecting mechanism which interconnects said flash light emission angle variable mechanism and said exposure data section so that the displays of said exposure data section may be varied when the flash light emission angle is varied by means of said flash light emission angle variable mechanism, whereby the operation of said flash light emission angle variable mechanism correspondingly varies the display of the flash light emission angle and the exposure information.
Claim 3
Dependent Claim
127 words
A photographic flash device as set forth in claim 1, further comprising a main body, wherein said exposure data section comprises an aperture plate, a film speed plate, and a distance-to-a-subject plate which may change relative positions, and a mounting mechanism for mounting said exposure data plates on said main body, said flash section being connected to said mounting mechanism in such a way that the position change operations of said exposure data plates may be permitted; said connecting mechanism comprising (i) a first operating member which is connected to said mounting mechanism so as to operate in cooperation with the operations of said exposure data plates, and (ii) a second operating member for connecting said flash light emission angle variable mechanism to said first operating member.
References Cited (Backward Citations)
US4141059A
Cited
US4190880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |