Camera for synchro-flash photography

Claim 1

IN A CAMERA FOR SYNCHRO-FLASH PHOTOGRAPHY, AN EXPOSURE METER INCLUDING A PAIR OF INTERCONNECTED MOVABLE CURRENT-CONDUCTING INDICATORS HAVING NORMALLY SPACED PORTIONS; A DIAPHRAGM SHUTTER INCLUDING SHUTTER MEANS MOVABLE FROM A NORMAL UNCOCKED POSITION IN WHICH THE DIAPHRAGM SHUTTER IS CLOSED TO A PLURALITY OF COCKED POSITIONS EACH OF WHICH CORRESPONDS TO A DIAPHRAGM OPENING OF A DIFFERENT SIZE, SAID SHUTTER MEANS HAVING A CURRENTCONDUCTING TRACKING PORTION MOVABLE INTO ENGAGEMENT WITH ONE OF SAID INDICATORS TO THEREBY DISPLACE THE PORTION OF SAID ONE INDICATOR INTO ENGAGEMENT WITH THE PORTION OF THE OTHER INDICATOR; A FIXED CURRENT-CONDUCTING ABUTMENT FOR SAID OTHER INDICATOR; A FLASH UNIT INCLUDING AN ELECTRIC CIRCUIT HAVING A FIRST TERMINAL CONNECTED WITH SAID TRACKING PORTION AND A SECOND TERMINAL CONNECTED WITH SAID ABUTMENT SO THAT SAID CIRCUIT IS COMPLETED THROUGH SAID INDICATORS WHEN THE TRACKING PORTION ENGAGES SAID ONE INDICATOR; AND COCKING MEANS FOR MOVING SAID SHUTTER MEANS TO A COCKED POSITION TO THEREBY MOVE SAID TRACKING PORTION FIRST INTO ENGAGEMENT WITH SAID ONE INDICATOR TO COMPLETE SAID CIRCUIT AND TO THEREUPON MOVE SAID TRACKING PORTION WITH SAID ONE INDICATOR UNTIL THE PORTION OF SAID ONE INDICATOR ABUTS AGAINST THE PORTION OF THE OTHER INDICATOR WHEREBY THE MOVEMENT OF SAID SHUTTER MEANS IS TERMINATED SUBSEQUENT TO COMPLETION OF SAID CIRCUIT AND IN A COCKED POSITION IN WHICH THE SIZE OF SAID OPENING IS A FUNCTION OF THE ANGULAR POSITION OF SAID INDICATORS.