| 摘要 |
<p>A film transport system includes an electric transport motor. Upon completion of an exposure, the motor is energized to perform a film-transport operation and upon conclusion thereof a perforation-feeler causes the motor to become short-circuited for quick arrest. A flash unit comprises an energy-storing capacitor connected in series with flash-unit batteries. When the film transport motor, which is powered off a motor battery, is motionless or in short-circuited condition, the energy-storing capacitor of the flash unit is permitted to charge both of the flash-unit batteries and the motor battery. When the film transport motor is in operation, the input terminals of the flash unit are conductively shunted together, thereby connecting the flash-unit batteries across the energy-storing capacitor so that the latter may continue to charge off its own batteries but not off the camera batteries. Alternatively, the flash unit does not have separate batteries of its own, and the energy-storing element of the flash unit charges off the motor battery when the film transport motor is at standstill or in short-circuited condition.</p> |
