Reduction gear box

Claim 1

A REDUCTION GEAR BOX COMPRISING A CASING 1 HAVING SPACED END WALLS, A DRIVING AND A DRIVEN SHAFT 2 AND 3 MOUNTED IN AXIAL ALIGNMENT IN SAID END WALLS FOR FREE ROTATION THEREIN, A PAIR OF STATIONARY SPUR GEARS 4 AND 41 MOUNTED IN SAID CASING ADJACENT TO SAID END WALLS CONCENTRICALLY WITH SAID ALIGNED SHAFTS, A PAIR OF AXIALLY SPACED CARRIER DISCS 5, 5 FREELY REVOLUBLY MOUNTED ON SAID DRIVING SHAFT 2, A DRIVING SPUR GEAR 6 FIXEDLY MOUNTED ON SAID DRIVING SHAFT BETWEEN SAID PAIR OF CARRIER DISCS, A PLURALITY OF FIRST SPUR GEARS 9 DISPOSED AROUND SAID DRIVING GEAR 6 TO BE DRIVEN THEREBY, SAID FIRST SPUR GEARS 9 BEING MOUNTED INDIVIDUALLY ON FIRST SHAFTS 10 FREELY REVOLUBLY CARRIED BY SAID CARRIER DISCS, A PAIR OF SECOND SPUR GEARS 11 AND 111 OF EQUAL DIAMETERS FIXEDLY MOUNTED ON EACH OF SAID FIRST SHAFTS 10 AT OPPOSITE ENDS THEREOF AND CONTINUOUSLY MESHING WITH SAID STATIONARY GEARS 4 AND 41, RESPECTIVELY, A PLURALITY OF THIRD SPUR GEARS 12 DISPOSED AROUND SAID DRIVING GEAR 6 TO BE DRIVEN THEREBY AND HAVING RESPECTIVE SECOND SHAFTS 13 ROTATIVELY CARRIED BY SAID CARRIER DISCS, A FOURTH SPUR GEAR 14 FIXEDLY MOUNTED ON EACH OF SAID SECOND SHAFTS 13 AT THE SIDE WHERE SAID DRIVEN SHAFT 3 EXTENDS, AND A DRIVEN SPUR GEAR 15 FIXEDLY MOUNTED ON SAID DRIVEN SHAFT AND MESHING WITH ALL OF SAID FOURTH SPUR GEARS 14, SAID DRIVEN GEAR 15 HAVING A PITCH CIRCLE DIAMETER SLIGHTLY LARGER THAN THE PITCH CIRCLE DIAMETER OF SAID STATIONARY GEARS, SAID STATIONARY SPUR GEARS, SAID SECOND SPUR GEARS AND DRIVEN SPUR GEAR HAVING THE SAME TOOTH PITCH.