Variable pitch coil winding device

Claim 1

IN A COIL WINDING MACHINE HAVING A BED, AND A MANDREL HAVING AN AXIS, SAID MANDREL BEING MOUNTED TO THE BED FOR ROTATION AROUND ITS AXIS, THE IMPROVEMENT COMPRISING: A FIRST CARRIAGE MOVABLY MOUNTED TO THE BED; A SECOND CARRIAGE MOVABLY MOUNTED TO THE FIRST CARRIAGE, THE SAID FIRST AND SECOND CARRIAGES BEING MOUNTED FOR MOTION PARALLEL TO THE AXIS OF THE MANDREL; A WIRE-PAYING MEANS MOUNTED TO SAID SECOND CARRIAGE, WHEREBY CONSTANT RELATIVE MOTION BETWEEN THE MANDREL AND THE FIRST CARRIAGE, WITHOUT RELATIVE MOTION BETWEEN THE FIRST AND SECOND CARRIAGES, RESULTS IN WINDING OF A COIL OF CONSTANT PITCH ON THE MANDREL; AND CONTROL MEANS INTERPOSED BETWEEN THE BED AND THE SECOND CARRIAGE ADAPTED TO MOVE THE SECOND CARRIAGE RELATIVE TO THE FIRST CARRIAGE TO VARY THE PITCH OF THE COIL WOUND ON THE MANDREL, SAID CONTROL MEANS COMPRISING A THIRD CARRIAGE MOUNTED TO THE FIRST CARRIAGE, SAID THIRD CARRIAGE BEING ADAPTED TO MOVE LATERALLY RELATIVE TO THE AXIS OF THE MANDREL, CONTOUR-RESPONSIVE MEANS FOR MOVING THE THIRD CARRIAGE RELATIVE TO THE FIRST CARRIAGE, AND CONTOUR-RESPONSIVE MEANS FOR MOVING THE SECOND CARRIAGE RELATIVE TO THE FIRST CARRIAGE.