Photographic camera with automatic flash exposure mechanism

Claim 1

IN A PHOTOGRAPHIC CAMERA PROVIDED WITH AN OBJECTIVE HAVING AN ADJUSTABLE DIAPHRAGM, A DIAPHRAGM APERTURE ADJUSTING MECHANISM INCLUDING MEANS FOR PRESELECTING THE DIAPHRAGM APERTURE TO BE ADJUSTED, AN AUTOMATIC EXPOSURE ADJUSTING MEANS, AND AN ACTUATING RING EXTENDING CONCENTRICALLY ABOUT THE OPTICAL AXIS OF SAID OBJECTIVE FOR SELECTIVELY ADJUSTING THE CAMERA TO A PLURALITY OF OPERATING RANGES, NAMELY TO A FLASH EXPOSURE RANGE, AN AUTOMATIC EXPOSURE RANGE AND A MANUALLY ADJUSTABLE DIAPHRAGM APERTURE RANGE, THE IMPROVEMENT COMPRISING MEANS FOR SELECTIVELY ATTACHING TO SAID CAMERA ANY ONE OF A NUMBER OF INTERCHANGEABLE OBJECTIVES OF DIFFERENT AND VARIABLE FOCAL LENGTHS RESPECTIVELY, AND MEANS FOR ADJUSTING THE ADJUSTING RANGE OF SAID ACTUATING RING TO THE RESPECTIVE DIFFERENT AND VARIABLE FOCAL LENGTHS OF SAID INTERCHANGEABLE OBJECTIVES INCLUDING AN ARRESTING DEVICE OPERATIVELY CONNECTED WITH SAID ACTUATING RING, SAID INTERCHANGEABLE OBJECTIVE BEING PROVIDED WITH A CONTROL MEMBER THEREON FOR RENDERING SAID ARRESTING DEVICE INEFFECTIVE, SAID CONTROL MEMBER HAVING A CAM THEREON FOR A LOCKING LEVER PIVOTALLY CARRIED BY SAID ACTUATING RING AND FORMING POSITION WHEN SAID INTERCHANGEABLE OBJECTIVE IS ATING POSITION WHEN SAID INTERCHANGEABLE OBJECTIVE IS ATTACHED TO THE CAMERA (FIG. 3).