US3613536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warning device for exposure meter
Assignee: Canon Inc
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Filing: 1969-07-18
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Granted: 1971-10-19
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Expires: 1989-07-18
Abstract
Abstract A warning device for an exposure meter for avoiding an erroneous photographic exposure. A restricting pin is provided at a limit point of the range of movement of the meter pointer so that the coincidence of the followup pointer with the meter pointer is avoided at the limit of said range.
Inventors
- 👤 Tatsuya Taguchi
- 👤 Yoshiaki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:47
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/04; G03B7/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
In a camera having a built-in exposure meter including a pointer, stop valve regulating means, shutter speed and film sensitivity setting means, a stop ring, a followup pointer, and means operable upon adjustment of the stop ring to adjust the followup pointer into coincidence with the meter pointer when the film sensitivity and shutter speed are set, means comprising a restricting member positioned at a limit point adjacent an end of the range of movement of the meter pointer to restrict movement of the followup pointer to prevent same from coinciding with the meter pointer at the limit point upon adjustment of the stop ring when the light reflected from the object to be photographed is beyond the photometry range of the meter.
Claim 2
Dependent Claim
123 words
In a camera having a built-in exposure meter including a pointer, stop valve regulating means, shutter speed and film sensitivity setting means, a stop ring, a followup pointer, and means operable upon adjustment of the stop ring to adjust the followup pointer into coincidence with the meter pointer when the film sensitivity and shutter speed are set, means comprising a restricting member positioned at a limit point adjacent an end of the range of movement of the meter pointer to restrict movement of the followup pointer to prevent same from coinciding with the meter pointer at the limit point upon adjustment of the stop ring when the light reflected from the object to be photographed is beyond the photometry range of the meter.
Claim 3
Dependent Claim
26 words
A warning means according to claim 1, in which restricting members are provided at both ends of the range of the movement of the meter pointer.
References Cited (Backward Citations)
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US2920542A
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US3002436A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |