Watson, Cole, Grindle & Watson
Automatic diaphragm control device for cameras
 An automatic diaphragm control device is constructed such that energization of a release electromagnetic causes a release interlock mechanism to simultaneously release diaphragm stop means and a diaphragm operating mechanism. This allows the diaphragm stop means to stop the diaphragm operating mechanism at a position maintaining the diaphragm fully open when a diaphragm control circuit, based on T.T.L light measurement, generates a diaphragm stop signal simultaneously with the energization of the release electromagnet to energize a diaphragm determination electromagnet which in turn releases the diaphragm stop means. In response to termination of an exposure, a reset member directly engages and returns the release interlock mechanism and the diaphragm operating mechanism while returning the diaphragm stop means through the release interlock mechanism. An adjusting member is disposed between a stop lever and an armature lever of the diaphragm stop means for enabling adjustment of the position of the stop lever relative to the armature lever. This adjustment makes it possible to minimize the time lag from the generation of the diaphragm stop signal till the actual stoppage of the diaphragm operating mechanism. Another adjusting member is disposed between the stop lever and the release interlock mechanism for enabling adjustment of the amount of overcharge of the stop lever which occurs with the release interlock mechanism having been returned by the reset member. 
Minolta Camera Kabushiki Kaisha
G G
G03B G03B
inventional inventional
Keiji Toshio
Yamazaki Kobori