SHUTTER RELEASE MECHANISM OF PHOTOGRAPHIC CAMERAS, PREFERABLY PROVIDED WITH ROLLER-BLIND SHUTTER

摘要

A camera shutter of the focal plane shutter type having first and second shutter parts which are released individually with a controlled relative time difference to provide a gap between the shutter parts which is proportional to a preselected shutter speed. A separate electromagnetic release means is provided for each shutter part. Upon initiation of shutter operation, the electromagnetic release means for the first shutter part is energized and, at the same time, an electronic timing means is set into operation. At the end of the interval demarcated by the electronic timing means, the electromagnetic release means associated with the second shutter part is energized to release the second shutter part, thereby terminating the exposure period.