Patent US3587433A successfully refreshed from Google Patents.
US3587433A
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US
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Camera shutter timing mechanism
Assignee: Minolta Co Ltd
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Filing: 1967-11-16
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Granted: 1971-06-28
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Expires: 1987-11-16
Abstract
Abstract AN RC TIMING NETWORK CONTROLS THE TIMING OF A LENS-TYPE SHUTTER AND INCLUDES IN SERIES A TIMING CAPACITOR, A FIRST RESISTOR WHICH IS VARIED TO CONTROL THE EXPOSURE TIME AND A COMPENSATING SECOND RESISTOR WHICH IS COUPLED TO THE SHUTTER APERTURE CONTROL TO VARY THE SECOND RESISTOR RESISTANCE AND HENCE THE RC TIME CONSTANT DIRECTLY WITH APERTURE SIZE SO THAT THE EFFECTIVE EXPOSURE TIME IS INDEPENDENT OF APERTURE SIZE.
Inventors
- 👤 Kintaro Yata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:41
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |