Winding machine for electric inductive apparatus

In a winding machine for forming an electrical inductive apparatus including a stationary support, a bearing mounted on said support, a main drive shaft supported at one end thereof by said bearing, and drive means for drivingly rotating said drive shaft, the improvement comprising

• a universal winding barrel having a slider mounted on said drive shaft for sliding in the axial direction of said shaft, a plurality of winding barrel plates disposed circumferentially around said shaft, a plurality of radially extending links pivotally connecting said slider to said plates, a rotating driving source mounted on the end of said drive shaft adjacent said bearing, a transmission rod extending through an axial bore in said drive shaft and beng connected at one end thereof to said rotating driving source so as to be rotated thereby, the other end of said transmission rod being in threaded engagement with the end of said slider so as to effect axial movement of said slider on said shaft as said transmission rod is rotated by said rotating driving source, and guide means for inhibiting axial movement of said plates while permitting radial movement thereof with respect to said drive shaft,
• said rotating driving source including a hydraulic motor, hydraulic slip ring means for supplying and discharging hydraulic fluid to said hydraulic motor comprising an inner annular rotating portion mounted on said drive shaft and an outer fixed annular portion coupled to said inner portion and mounted on said support, first and second flow passages being formed in the mating surfaces between said rotating and fixed portions, a source of hydraulic pressure, and at least two pipes connected from one of said flow passages to said hydraulic source through said fixed portion and from the other of said flow passages to said hydraulic motor through said rotating portion, respectively.