Multi-speed transmission

Claim 1

A MULTI-SPEED TRANSMISSION FOR A MILLING MACHINE OR THE LIKE COMPRISING, IN COMBINATION, AN INPUT SHAFT, AN OUTPUT SHAFT IN SPACED PARALLEL RELATION WITH SAID INPUT SHAFT, A PLURALITY OF SPACED APART OUTPUT GEARS OF DIFFERENT DIAMETER ON SAID OUTPUT SHAFT, A SLIDABLE FRAME, MEANS MOUNTING SAID SLIDABLE FRAME FOR MOVEMENT LENGTHWISE OF THE OUTPUT SHAFT, A ROCKER FRAME PIVOTALLY MOUNTED ON SAID SLIDABLE FRAME AND ABOUT SAID INPUT SHAFT, A PAIR OF STUB SHAFTS CARRIED BY SAID ROCKER FRAME WITH ONE ON EACH SIDE OF THE INPUT SHAFT, A PAIR OF DRIVE GEARS SPLINED ON SAID INPUT SHAFT AND OPERABLY ASSOCIATED WITH SAID SLIDABLE FRAME FOR MOVEMENT THEREWITH, A PAIR OF INTERMEDIATE GEARS OF DIFFERENT DIAMETERS CLOSELY ADJACENT EACH OTHER ON EACH OF SAID STUB SHAFTS OPERATIVELY CONNECTED TO SAID DRIVE GEARS TO HAVE ONE STUB SHAFT ROTATE AT ONE SPEED AND THE OTHER STUB SHAFT ROTATE AT A DIFFERENT SPEED, THE SPACE BETWEEN GEARS ON SAID OUTPUT SHAFT BEING OF A WIDTH SUFFICIENT TO RECEIVE THE LARGER OF SAID INTERMEDIATE GEARS, MEANS FOR SHIFTING SAID SLIDABLE FRAME AND ROCKER FRAME ALONG THE INPUT SHAFT TO ALIGN AN INTERMEDIATE GEAR OF EACH PAIR WITH ONE OF SAID OUTPUT GEARS TO PROVIDE FOR TWO DIFFERENT OUTPUT SPEEDS, AND MEANS FOR PIVOTING THE ROCKER FRAME SELECTIVELY IN EITHER DIRECTION ABOUT THE INPUT SHAFT TO MESH EITHER A GEAR OF THE ONE STUB SHAFT OR A GEAR OF THE OTHER STUB SHAFT WITH SAID ONE OUTPUT GEAR TO PROVIDE DIFFERENT SPEED FOR SAID OUTPUT SHAFT WITH THE TRAVEL OF THE ROCKER FRAME BEING VARIABLE DEPENDENT UPON THE DIAMETER RATIO OF THE GEARS BEING BROUGHT INTO MESH.