US3621770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-exposure device
Assignee: Nikon Corp
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Filing: 1969-04-17
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Granted: 1971-11-23
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Expires: 1989-04-17
Abstract
Abstract A MULTIPLE-EXPOSURE DEVICE FOR A CAMERA COMPRISING A FILM ADVANCE OR WINDING MEMBER, A SHUTTER CHARGING MECHANISM AND A FILM WIND UP MECHANISM EMPLOYS A DIFFERENTIAL GEAR MECHAMISM. A STOP MEMBER, AND A MANNUAL OPERABLE SWITCHING MEMBER WHICH ACTUATE THE STOP MEMBER, ARE PROVIDED IN THE FILM WIND UP MECHANISM. TO MAKE MULTIPLE-EXPOSURE, THE STOP MEMBER IS ACTUATED BY THE MANUALLY OPERABLE SWITCHING MEMBER TO STOP THE FILM WIND UP MECHANISM AND TO ENABLE ONLY THE SHUTTER CHARGING MECHANISM TO OPERATE. AS A RESULT, MULTIPLE-EXPOSURE OPERATION IS AFFORDED UNTIL THE SWITCHING MEMBER IS RETURNED TO NORMAL DOUBLE EXPOSURE PREVENTION OPERATION.
Inventors
- 👤 Tomio Tsuruoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/28; G03B17/30; G03B17/305; G03B17/42
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |