US3947862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure multiplication indicating means for automatic exposure setting camera
Assignee: Pentax Corp
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Filing: 1975-01-30
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Granted: 1976-03-30
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Expires: 1995-01-30
Abstract
Abstract In one arrangement, the exposure multiplication indicating means includes an exposure multiplication selector dial having a small window cut therein and numerals marked thereon representing exposure multiplication, a film sensitivity dial, and an indicium. Numerals marked on said film sensitivity dial for representing the film sensitivity are observed, one by one, through said small window cut in the exposure multiplication selector dial, and the exposure multiplication is indicated by the numeral which is marked on the exposure multiplication selector dial in alignment with said indicium. In another arrangement, a main switch energizes the automatic exposure setting circuit and also energizes an element indicating the exposure multiplication setting. A source voltage confirming circuit enables the exposure multiplication indicating means to operate only when the source voltage is of a predetermined value.
Inventors
- 👤 Koichiro Watanabe
- 👤 Tetsuji Shono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:28
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
86 words
In a camera the inventive combination comprising: an automatic exposure setting means; means for indicating the exposure setting determined by said exposure setting means; means for multiplying the exposure setting so as to set the exposure at some value other than that automatically determined; means for indicating the multiplication of said exposure setting by said exposure multiplying means; and means connecting the exposure multiplying means and the multiplication indicating means so that the multiplication indicating means automatically indicates the multiplication as the multiplying means is set.
Claim 2
Dependent Claim
86 words
In a camera the inventive combination comprising: an automatic exposure setting means; means for indicating the exposure setting determined by said exposure setting means; means for multiplying the exposure setting so as to set the exposure at some value other than that automatically determined; means for indicating the multiplication of said exposure setting by said exposure multiplying means; and means connecting the exposure multiplying means and the multiplication indicating means so that the multiplication indicating means automatically indicates the multiplication as the multiplying means is set.
Claim 3
Dependent Claim
77 words
A camera comprising: an exposure control circuit; means for indicating the exposure setting; an exposure multiplication indicating circuit connected to be energized with said exposure control circuit; adjustable exposure multiplication means to modify the camera exposure setting; switch means operated by said multiplication means connected to said exposure multiplication indicating circuit to control the indicating circuit in accordance with the setting of said multiplication means; and main switch means connected to control the energization of said circuits.
Claim 4
Dependent Claim
77 words
A camera comprising: an exposure control circuit; means for indicating the exposure setting; an exposure multiplication indicating circuit connected to be energized with said exposure control circuit; adjustable exposure multiplication means to modify the camera exposure setting; switch means operated by said multiplication means connected to said exposure multiplication indicating circuit to control the indicating circuit in accordance with the setting of said multiplication means; and main switch means connected to control the energization of said circuits.
Claim 5
Dependent Claim
25 words
The camera of claim 2 including luminous indicating means energized by said exposure multiplication indicating circuit to correspond to the setting of said multiplication means.
Claim 6
Dependent Claim
56 words
The camera of claim 3 including a voltage confirming circuit connected to said exposure multiplication indicating circuit to enable said indicating circuit to be energized only when a predetermined voltage is available so that the camera operator is warned by the absence of the luminous indicating means that the voltage for operating the circuits is inadequate.
Claim 7
Independent Claim
52 words
A method of indicating the condition of a camera exposure multiplication setting, comprising: modifying an automatic exposure control setting by adjusting the setting of exposure multiplication means; and automatically indicating the setting of the exposure multiplication means as the exposure multiplication means is set, in addition to indicating the exposure control setting.
Claim 8
Independent Claim
52 words
A method of indicating the condition of a camera exposure multiplication setting, comprising: modifying an automatic exposure control setting by adjusting the setting of exposure multiplication means; and automatically indicating the setting of the exposure multiplication means as the exposure multiplication means is set, in addition to indicating the exposure control setting.
Claim 9
Dependent Claim
19 words
The method of claim 5 wherein the exposure multiplication is indicated by energizing light means located on 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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |