US3640201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-driven winding device for a camera
Assignee: Nikon Corp
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Filing: 1969-12-24
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Granted: 1972-02-08
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Expires: 1989-12-24
Abstract
Abstract A motor-driven device for releasing the shutter, advancing the film and cocking the shutter of a camera, and permitting single frame or continuous exposures to be made. The motor control includes a single switch controlled by a relay coil. The relay coil is includable in and capable of being energized by either of two mutually exclusive circuit paths each including in series, one of the contacts of a two-position changeover switch which selects the particular path for energizing the coil. The motor controls a mechanical arrangement which has two sequences of operation; a first sequence which releases the shutter and places the changeover switch in the second position, and a second sequence which advances the film, cocks the shutter and places the changeover switch in the first position. An operating button is connected in series with the first circuit path and a transistor switch is connected in the second circuit path. A selector switch is connected between the two circuit paths. For single frame exposures the selector switch turns the transistor OFF when the button is depressed. For continuous exposures, the transistor remains ON all the time. A timing circuit is further added for time-delayed continuous exposures.
Inventors
- 👤 Shuji Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:04
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
246 words
A drive device for a camera for releasing the shutter, advancing the film and cocking the shutter, capable of singleframe and continuous exposure, and comprising, a power source; an electric motor; a single switch for interconnecting said motor with said source; a relay coil for controlling said single switch; a changeover switch having first and second contact positions; first and second circuit paths both including said relay coil in series therein and both mutually exclusively capable of energizing said coil from said source, said first and second paths including respectively said first And second contact positions in series therein; driving mechanism means coupled to said motor and including means for producing a first sequence of operations when said coil is energized through said first circuit path, including releasing the shutter and placing said changeover switch in said second position, and further including means for producing a second sequence of operations when said second path energizes said coil, including advancing the film, cocking the shutter and placing said switch in said first position; an operating switch connected in series with said first circuit path; transistor switch means connected in said second circuit path, control means connected between said first and second circuit paths for keeping said transistor in an ON state during continuous exposure operations and keeping said transistor in an OFF state when said operating button is depressed during single-frame exposure operation, and a selector switch for selectively connecting said control means into said second path.
Claim 2
Dependent Claim
246 words
A drive device for a camera for releasing the shutter, advancing the film and cocking the shutter, capable of singleframe and continuous exposure, and comprising, a power source; an electric motor; a single switch for interconnecting said motor with said source; a relay coil for controlling said single switch; a changeover switch having first and second contact positions; first and second circuit paths both including said relay coil in series therein and both mutually exclusively capable of energizing said coil from said source, said first and second paths including respectively said first And second contact positions in series therein; driving mechanism means coupled to said motor and including means for producing a first sequence of operations when said coil is energized through said first circuit path, including releasing the shutter and placing said changeover switch in said second position, and further including means for producing a second sequence of operations when said second path energizes said coil, including advancing the film, cocking the shutter and placing said switch in said first position; an operating switch connected in series with said first circuit path; transistor switch means connected in said second circuit path, control means connected between said first and second circuit paths for keeping said transistor in an ON state during continuous exposure operations and keeping said transistor in an OFF state when said operating button is depressed during single-frame exposure operation, and a selector switch for selectively connecting said control means into said second path.
Claim 3
Dependent Claim
104 words
A device as in claim 1 wherein said transistor switch means has its emitter and collector connected in series with said relay coil through said second contact position of said changeover switch, and its base connected to one end of said power source, said power source connected in parallel across said last-mentioned series connection, said selector switch, said control means and said operating button connected in series between said base and the other end of said power source, whereby when both said selector switch and said operating button are closed, said emitter-base voltage is approximately identical and said transistor is in an OFF state.
Claim 4
Dependent Claim
42 words
A device as in claim 2 wherein said control means includes a diode connected in series with said selector switch and said operating button and biased to prevent base to emitter current flow when said changeover switch is in said first position.
Claim 5
Dependent Claim
32 words
A device as in claim 1 wherein said first circuit path includes in series said power source, said relay coil, said first contact position of said changeover switch and said operating button.
Claim 6
Dependent Claim
32 words
A device as in claim 2 wherein said second circuit path includes in series said power source, said relay coil, said transistor means, and said second contact position of said changeover switch.
Claim 7
Dependent Claim
22 words
A device as in claim 1 and further comprising a remote control switch detachably connected in parallel arrangement with said operating button.
Claim 8
Dependent Claim
23 words
A device as in claim 1 and further comprising a timed delay circuit switchably connected between said transistor means and said power source.
Claim 9
Dependent Claim
51 words
A device as in claim 7, wherein said timed delay circuit includes a further transistor having its collector connected to said selector switch and a capacitor and variable resistor connected between its base and one side of said power source, the other side of said power source connected to its emitter.
Claim 10
Dependent Claim
41 words
A device as in claim 8 wherein said timed delay circuit further includes additional resistor means in series with additional switch means connected in parallel across said capacitor and wherein said additional switch means is ganged to said change over switch.
Claim 11
Dependent Claim
62 words
A device as in claim 7 wherein said selector switch is a three-positioned manually movable contact switch, said selector being connected to said operating button for its first contact position for single frame exposure, to said timed delay circuit for its second contact position for delaying the timing of continuous exposures, and is disconnected for its third position for normal continuous exposures.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |