Patent ID: 6948530

Claim:
A weaving machine comprising a magnetic traction device, said magnetic traction device comprising two magnetic tracks arranged in parallel at two sides of warp threads, a set of magnetic traction plates disposed at two sides of warp threads and defining a contained angle, a plurality of main coils respectively disposed at a bottom side of each of said magnetic traction plates and respectively sleeved onto said magnetic tracks and adapted to reciprocate along said magnetic tracks without contact when alternatively reversely connected with electric current, said magnetic traction plates each having two end magnets and an intermediate magnet respectively disposed at each of two opposing inner sides, said end magnets having magnetic lines of force extending from an outer side toward an inner side, said intermediate magnetic having magnetic lines of force extending from an outer side toward an inner side and from an upper side toward a bottom side, said magnetic tracks each having a buffer spring member at each of two distal ends thereof; a shuttle set in warp threads within the contained angle of said magnetic traction plates and adapted to move weft threads over warp threads, said shuttles comprising two sloping sidewalls, two end magnets respectively disposed at front and rear sides of each of said two sloping sidewalls and adapted to act with the end magnets at said magnetic traction plates to keep said shuttles be suspended within the contained angle of said magnetic traction plates, an intermediate magnet disposed between the two end magnets at each of the two sloping sidewalls and adapted to produce a magnetic repulsive force against the intermediate magnets at said magnetic traction plates to keep said shuttle away from an inner surface of said magnetic traction plates; a set of magnetic rails symmetrically provided at said main coils at a bottom side corresponding to the length of said magnetic tracks; and a set of adjustment plates respectively pivoted to said main coils at a bottom side and adapted to adjust the contained angle of said magnetic traction plates, said adjustment plates each comprising a plurality of lugs respectively pivoted to respective lugs at said main coils, and adjustment screws respectively fastened to said lugs and adapted to adjust the pitch between said adjustment plates and said magnetic rails, said adjustment plates each having a plurality of magnets mounted thereon and adapted to produce a magnetic repulsive force against said magnetic rail to keep said adjustment plates out of contact with said magnetic rails; wherein when electric current is connected to said main coils, a magnetic push force is produced between said main coils and said magnetic tracks to push said main coils and said magnetic traction plates along said magnetic tracks without contacting said magnetic tracks and simultaneously to carry said shuttle, causing said shuttle to move weft threads over warp threads.