Combination handwheels and handwheel clutches for sewing machines

Claim 1

A COMBINATION HANDWHEEL AND HANDWHEEL CLUTCH FOR THE END OF A SEWING MACHINE SHAFT COMPRISING A ROTARY MEMBER HAVING A HOLE FOR ROTATABLY MOUNTING ON THE END OF THE SEWING MACHINE SHAFT, A HOLLOW CYLINDRICAL PORTION EXTENDING FROM THE OUTER END OF THE ROTARY MEMBER, A COLLAR, A TILTABLE PLATE HAVING A DIAMETER SLIGHTLY LESS THAN THE INNER DIAMETER OF THE HOLLOW CYLINDRICAL PORTION OF THE ROTARY MEMBER, A BRACKET PROTRUDING FROM THE REVERSE SIDE OF THE TILTABLE PLATE, PIVOT MEANS FOR PIVOTALLY CONNECTING THE BRACKET TO THE COLLAR, LOCKING MEANS FOR LOCKING THE COLLAR TO THE SEWING MACHINE SHAFT SO THAT THE TILTABLE PLATE CLOSES THE OPEN END OF THE HOLLOW CYLINDRICAL PORTION ON THE ROTARY MEMBER, ABUTMENT MEANS ON THE END OF THE ROTARY MEMBER, ABUTMENT HOLLOW CYLINDRICAL PORTION EXTENDS, A PROJECTION ALSO PROTRUDING FROM THE REVERSE SIDE OF THE TILTABLE PLATE, AND AN OVER-CENTER BLADE SPRING BETWEEN THE COLLAR AND THE REVERSE SIDE OF THE TILTABLE PLATE FOR HOLDING THE TILTABLE PLATE AFTER LIGHT MANUAL PRESSURE ON THE OBVERSE SIDE SELECTIVELY IN A SUBSTANTIALLY PERPENDICULAR POSITION RELATIVE TO THE SEWING MACHINE SHAFT WITH THE PROJECTION ON THE TILTABLE PLATE ABUTTING THE ABUTMENT MEANS TO LOCK THE ROTARY MEMBER TO THE SEWING MACHINE SHAFT AND IN AN OBLIQUE POSITION RELATIVE TO THE SEWING MACHINE SHAFT WITH THE PROJECTION ON THE TILTABLE PLATE CLEARING THE ABUTMENT MEANS TO PERMIT THE ROTARY MEMBER TO ROTATE FREELY ON THE SEWING MACHINE SHAFT.