Flash synchronized shutter

Claim 1

IN A FLASH SYNCHRONIZED SHUTTER, THE COMBINATION COMPRISING A BASE PLATE HAVING A FIRST APERTURE THEREIN, A MASKING PLATE SWINGABLY MOUNTED ON SAID BASE PLATE BETWEEN AN INITIAL POSITION AND AN ACTUATED POSITION, SAID MASKING PLATE HAVING A SECOND APERTURE THEREIN MOVABLE OPPOSITE SAID FIRST APERTURE WHEN SAID MASKING PLATE IS MOVED TO SAID ACTUATED POSITION, A FIRST RETURN SPRING BIASING SAID MASKING PLATE TOWARD SAID INITIAL POSITION, A FLY PLATE MOUNTED ON SAID BASE PLATE FOR SWINGING MOVEMENT ABOUT THE SAME AXIS AS SAID MASKING PLATE, INTERENGAGEABLE LATCHING ELEMENTS ON SAID MASKING PLATE AND SAID FLY PLATE FOR LATCHING SAID FLY PLATE TO SAID MASKING PLATE SO THAT SAID FLY PLATE WILL TRAVEL WITH SAID MASKING PLATE WHEN SAID MASKING PLATE IS SWUNG TOWARD SAID ACTUATED POSITION, AN UNLATCHING CAM ON SAID BASE PLATE AND ENGAGEABLE BY SAID FLY PLATE AS SAID MASKING PLATE AND SAID FLY PLATE APPROACH SAID ACTUATED POSITION, SAID CAM BEING OPERATIVE TO DISPLACE SAID FLY PLATE AWAY FROM SAID MASKING PLATE SO AS TO DISENGAGE SAID LATCHING ELEMENTS AND RELEASE SAID FLY PLATE FROM SAID MASKING PLATE, A SECOND RETURN SPRING CONNECTED TO SAID FLY PLATE FOR RAPIDLY RETURNING SAID FLY PLATE TO SAID INITIAL POSITION, SAID FLY PLATE HAVING A THIRD APERTURE MOVABLE PAST SAID SECOND APERTURE DURING RETURN MOVEMENT OF SAID FLY PLATE, A STATIONARY ELECTRICAL CONTACT IN THE PATH OF THE SWINGING MOVEMENT OF SAID FLY PLATE AND ENGAGEABLE BY SAID FLY PLATE DURING RETURN MOVEMENT THEREOF, AND A SECOND CAM ON SAID MASKING PLATE AND OPERATIVE TO ENGAGE SAID FLY PLATE WHEN SAID FLY PLATE IS LATCHED TO SAID MASKING PLATE FOR DISPLACING SAID FLY PLATE OUT OF ENGAGEMENT WITH SAID CONTACT DURING THE ACTUATING MOVEMENT OF SAID MASKING PLATE, SAID FLY PLATE BEING MOVABLE OFF OF SAID SECOND CAM UPON BEING UNLATCHED FROM SAID MASKING PLATE, SAID FLY PLATE HAVING AN ELEMENT ENGAGEABLE WITH SAID SECOND CAM AND OPERATIVE TO RIDE OVER SAID SECOND CAM TO RETARD THE RETURN MOVEMENT OF SAID FLY PLATE WHILE ALSO DISENGAGING SAID FLY PLATE FROM SAID CONTACT.