| 摘要 |
A mechanism for winding photographic film in a device such as a camera. The mechanism includes a rotary drive and a transmission for operating a film winder. The transmission includes a friction clutch which is capable of having the degree of friction thereof adjusted. The transmission coacts with the rotary drive for transmitting the drive therefrom to the film winder. In addition, the transmission responds automatically to an increasing load for automatically increasing the friction of the friction clutch, so that in this way the mechanism adapts itself to the size of the load and is capable of absorbing sudden load increases while maintaining a smooth film movement substantially free of any shocks. |
