Compact mechanically-powered electric generator for a camera or other apparatus

摘要

An electrical component, such as a photoflash lamp that is associated with a photographic camera, is energized by an electric current produced by a compact mechanically-driven electric generator that is located within the camera and coupled to the shutter-actuating mechanism. The generator employs a spring-driven keeper that changes the reluctance of a magnetic circuit and causes an associated wire coil to produce a voltage pulse that is synchronized relative to the opening of the camera aperture. The generator is compact enough to fit inside "Instamatic" type cameras and provides a simple, reliable and inexpensive substitute for the batteries now employed in such cameras. The small size and reliability of the generator adapt it for use in other types of devices and systems that require a passive easily-triggered electrical power source.