Motion picture camera with film controlled signal

Claim 1

IN A MOTION PICTURE CAMERA PROVIDED WITH A VIEWFINDER AND MEANS CONTROLLED BY THE FILM IN SAID CAMERA FOR CONTROLLING THE OPERATION OF A WARNING DEVICE WHICH IS ARRANGED TO BECOME VISIBLE IN SAID VIEWFINDER, SAID MEANS INCLUDING AN ELECTRIC CIRCUIT, TWO CONTACT PORTIONS ARRANGED IN SAID ELECTRIC CIRCUIT OPPOSITE TO ONE ANOTHER AND SEPARATED FROM ONE ANOTHER BY A PORTION OF THE FILM INSERTED IN SAID CAMERA, A PAIR OF NORMALLY SEPARATED CONTACTS IN SAID CIRCUIT, DRIVE MEANS FOR MOVING SAID FILM IN SAID CAMERA, AND MEANS OPERATED BY SAID FILM MOVING MEANS FOR PERIODICALLY CLOSING SAID PAIR OF CONTACTS, WHEREBY THE CIRCUIT OF SAID WARNING DEVICE IS INTERMITTENTLY COSED WHEN SAID TWO CONTACT PORTIONS ARE NO LONGER SEPARATED FROM ONE ANOTHER BY SAID FILM SAID MEANS FOR MOVING SAID FILM IN SAID CAMERA INCLUDING AN ELECTRIC MOTOR, A SOURCE OF CURRENT, A SWITCH FOR CONTROLLING THE OPERATION OF SAID ELECTRIC MOTOR AND MEANS CONNECTING SAID ELECTRIC CIRCUIT CONTAINING SAID WARNING DEVICE WITH SAID SWITCH IN SUCH A MANNER THAT SAID ELECTRIC CIRCUIT IS ADAPTED TO BE ENERGIZED BY SAID SOURCE OF CURRENT ONLY WHEN SAID SWITCH IS CLOSED AND SAID MOTOR OPERATES.