Camera

Claim 1

IN A MOTION PICTURE CAMERA OF THE TYPE INCLUDING A SHUTTLE, A CAMER DRIVE FOR INTERMITTENTLY DRIVING THE SHUTTLE, A HOUSING HAVING A MAGAZINE COMPARTMENT AND INCLUDING AN INNER WALL, A MAGAZINE FITTING INTO THE COMPARTMENT AND INCLUDING A GATE, A TAKE-UP SPINDLE MOUNTED IN THE MAGAZINE AND HAVING A DRIVING SOCKET ADJACENT THE SAID INNER WALL, MEANS FOR COUPLING THE TAKE-UP SPINDLE TO THE CAMERA DRIVE, COMPRISING: A DRIVE SHAFT FOR THE TAKEUP SPINDLE EXTENDING THROUGH THE SAID WALL AND HAVING A DRIVING PORTION ADAPTED TO INTERLOCK WITH THE SOCKET ON THE TAKE-UP SPINDLE, A FIRST COUPLING MEMBER FREELY MOUNTED FOR ROTATION ON AND RELATIVE TO SAID DRIVE SHAFT, SAID FIRST COUPLING MEMBER BEING DRIVINGLY CONNECTED TO THE CAMERA DRIVE, A SECOND COUPLING MEMBER KEYED ON SAID DRIVE SHAFT FOR ROTATION THEREWITH, AT LEAST ONE INTERENGAGING MEANS ON EACH OF SAID COUPLING MEMBERS POSITIONED RADIALLY AWAY FROM SAID DRIVE SHAFT AND ON THE LOCUS OF A CYLINDER COAXIAL WITH THE AXIS OF SAID DRIVE SHAFT, THE INTERENGAGING MEANS ON EACH OF SAID COUPLING MEMBERS CONSTITUTING A RELATIVELY SMALL PROPORTION OF THE CIRCUMFERENCE OF THE CYLINDER ON WHICH SAID MEANS LIE, SAID INTERENGAGING MEANS ON EACH OF SAID COUPLING MEMBERS BEING ADAPTED TO NORMALLY ENGAGE ONE ANOTHER IN INTERLOCKING ENGAGEMENT WHEREBY SAID SECOND COUPLING MEMBER WILL BE DRIVEN BY SAID FIRST COUPLING MEMBER, SAID INTERENGAGING MEANS BEING FURTHER ADAPTED TO RESILIENTLY DISENGAGE AND BREAK AWAY FROM LOCKING ENGAGEMENT UNDER THE PREDETERMINED TORQUE EXERTED ON THE SECOND COUPLING MEMBER WHEN FILM ON SAID TAKE-UP SPINDLE BECOMES TIGHTLY WOUND, WHEREBY SAID FIRST COUPLING MEMBER WILL ROTATE RELATIVE TO SAID SECOND COUPLING MEMBER WITH LOST MOTION FOR A SUBSTANTIAL PORTION OF A REVOLUTION, AND ALLOW FILM PASSING FROM THE GATE TO THE TAKE-UP SPINDLE TO BECOME LOOSE ON SAID TAKE-UP SPINDLE.