Patent US3762285A successfully refreshed from Google Patents.
US3762285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for varying camera exposure conditions
Assignee: Minolta Co Ltd
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Filing: 1971-04-07
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Granted: 1973-10-02
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Expires: 1991-04-07
Abstract
Abstract The exposure conditions determined by a light receptive element and the control of an exposure are varied in accordance with at least one of a number of exposure parameters by control apparatus wherein a member is set in accordance with at least one of the exposure parameters. An exposure setting member is movable from a first position and positions shifted therefrom. A first operating mechanism is movable from a rest position to an operating position to shift the exposure setting member and a second operating mechanism moves the first operating mechanism predetermined distances from the rest position to its operating position. The exposure setting member is successively adjusted by predetermined successive amounts during successive film winding operations.
Inventors
- 👤 S Tenkumo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:16
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
Control apparatus in a camera for varying exposure conditions determined by a light receptive element and means for controlling exposure in accordance with at least one of a number of exposure parameters, comprising: means for controlling at least one of said number of exposure parameters and including a number for setting at least one of said exposure parameters and an exposure setting member movable from a first position set by said member and positions shifted therefrom; means for adjusting said means for controlling and including a first operating mechanism movable from a rest position to an operating position for shifting said exposure setting member in accordance with said operated position and a second operating mechanism for moving said first operating mechanism predetermined respective distances from said rest position to said operating position; and means for operating said means for adjusting by predetermined successive amounts during successive film winding operations.
Claim 2
Dependent Claim
149 words
Control apparatus in a camera for varying exposure conditions determined by a light receptive element and means for controlling exposure in accordance with at least one of a number of exposure parameters, comprising: means for controlling at least one of said number of exposure parameters and including a number for setting at least one of said exposure parameters and an exposure setting member movable from a first position set by said member and positions shifted therefrom; means for adjusting said means for controlling and including a first operating mechanism movable from a rest position to an operating position for shifting said exposure setting member in accordance with said operated position and a second operating mechanism for moving said first operating mechanism predetermined respective distances from said rest position to said operating position; and means for operating said means for adjusting by predetermined successive amounts during successive film winding operations.
Claim 3
Dependent Claim
53 words
Control apparatus as in claim 1 further comprising manually settable selecting means alternatively settable between a first position for selecting normal exposure conditions wherein said second operating mechanism is disengaged from said first operating mechanism, and a second position for selecting exposure conditions differing from said normal exposure conditions by a predetermined value.
Claim 4
Dependent Claim
34 words
Control apparatus as in claim 1 further comprising means for resetting said second operating mechanism from said operated position to said rest position subsequent to termination of a predetermined number of film winding operations.
Claim 5
Dependent Claim
74 words
Control apparatus as in claim 1 wherein said means for controlling comprises electrical timing means including variable resistance means varied for adjusting the exposure time; said means for adjusting comprises a number of switching means each controlling a respective portion of said variable resistance means; and said means for operating comprises means for controlling said number of switching means whereby said number of switching means are selected in response to a film winding operation.
Claim 6
Dependent Claim
58 words
Control apparatus as in claim 4 whereby said number of switch means comprises a corresponding number of transistors each one of said number of transistors respectively shunting a portion of said variable resistance means, and said means for controlling includes additional switch means responsive to a film winding operation for sequentially controlling one of said number of transistors.
Claim 7
Dependent Claim
39 words
Control apparatus as in claim 4 wherein said electric timing means further includes means for integrating, a switching circuit biased by said variable resistance means, and means actuated by the output of said switching circuit for controlling said exposure.
Claim 8
Dependent Claim
69 words
Control apparatus as in claim 6 wherein said means for integrating includes light receptive means and a capacitor serially interconnected therewith, and further comprising manually settable selecting means alternatively settable between a first position for selecting normal exposure conditions wherein said second operating mechanism is disengaged from said first operating mechanism, and a second position for selecting exposure conditions differing from said normal exposure conditions by a predetermined value.
References Cited (Backward Citations)
US3584561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |