US4383746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiexposable motor-drive-film-winding camera
Assignee: Konica Minolta Inc
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Filing: 1981-05-08
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Granted: 1983-05-17
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Expires: 2001-05-08
Abstract
Abstract In a motor-drive film-winding camera of the type capable of multiexposure, having separate motors for cocking the shutter (or the mirror in a single lens reflex camera), and for film winding, a changeover is provided to switch from normal operation with energization of both motors to a multiexposure mode providing for double exposure operating the shutter cocking motor while the film-winding motor remains idle. Operation is limited to a double exposure since when the latter is completed, the changeover switch is overridden and the system returns to normal operation.
Inventors
- 👤 Kazuhisa Aratame
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
104 words
In a multiple exposure camera having a shutter cocking motor and a film-winding motor, a source of power for said motors, means responsive to a shutter release completion signal for normally energizing said motors from said source of power to effect cocking of the camera and subsequently effect a one-frame advance of film, changeover means energizing said shutter cocking motor while maintaining said film-winding motor in the deenergized condition for a sufficient time to effect a double exposure, and means following a double exposure for overriding said changeover means and effecting normal energization of both motors in response to a shutter release completion signal.
Claim 2
Dependent Claim
104 words
In a multiple exposure camera having a shutter cocking motor and a film-winding motor, a source of power for said motors, means responsive to a shutter release completion signal for normally energizing said motors from said source of power to effect cocking of the camera and subsequently effect a one-frame advance of film, changeover means energizing said shutter cocking motor while maintaining said film-winding motor in the deenergized condition for a sufficient time to effect a double exposure, and means following a double exposure for overriding said changeover means and effecting normal energization of both motors in response to a shutter release completion signal.
Claim 3
Dependent Claim
66 words
In a multiple exposure camera according to claim 1 in which said changeover means includes a flip flop circuit, and in which said last means includes a solenoid operated double exposure switch, means responsive to energization of said shutter cocking motor to control energization of said solenoid, and means responsive to actuation of said double exposure switch for controlling the output of said flip flop circuit.
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) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |