| 摘要 |
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.
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