Belt pulley with infinitely variable diameter

Claim 1

A BELT PULLEY OF INFINITELY VARIABLE DIAMETER, COMPRISING A HUB, TWO AXIALLY SPACED DISCS MOUNTED ON SAID HUB, ONE OF SAID DISCS BEING FIXED ON SAID HUB, THE OTHER OF SAID DISCS BEING AXIALLY MOVABLE AND ROTATABLY MOUNTED ON SAID HUB, A PLURALITY OF SEGMENTS DISPOSED BETWEEN SAID TWO DISCS SUCH THAT THE OUTER SURFACES OF SAID SEGMENTS DEFINE THE BASE OF THE GROOVE OF SAID PULLEY SAID HUB BEING THREADED AT THE END SUPPORTING SAID SLIDABLY MOUNTED DISC, A NUT MOUNTED ON SAID THREADED END OF SAID HUB AND PERMITTING PRESSING TOGETHER SAID TWO DISCS AND SEGMENTS AND CLAMPING SAID SEGMENTS BETWEEN SAID DISCS, ONE OF SAID TWO DISCS HAVING A PLURALITY OF RADIAL GROOVES OR SLOTS AT LEAST EQUAL IN NUMBER TO THAT OF SAID SEGMENTS, THE LATTER INLCUDING BOSSED SLIDABLY DISPOSED WITHIN SAID RADIAL GROOVES OR SLOTS OF SAID DISC, THE OTHER OF SAID TWO DISCS COMPRISING AT LEAST ONE SPIRAL GROOVE DISPOSED ON THE INNER SURFACE THEREOF, AND SAID SEGMENTS HAVING ON THEIR SURFACE OPPOSITE SAID INNER FACE OF SAID OTHER DISC BOSSES MESHING WITH SAID SPIRAL GROOVES OF SAID OTHER DISC.