Variable stroke shaker mechanism for paper making machines

Claim 1

A SHAKER MECHANISM FOR FOURDRINIER PAPER MAKING MACHINES INCLUDING A SHAKE RAIL MOUNTED TO SWING LATERALLY TO EITHER SIDE OF A CENTRAL POSITION, ROTARY INPUT SHAFT MEANS, AN OUTPUT SHAFT MOUNTED FOR ROTARY AND RECIPROCATING MOVEMENT, MOTION TRANSMITTING MEANS INTERCONNECTING SAID INPUT SHAFT MEANS AND SAID OUTPUT SHAFT FOR IMPARTING A ROTATING AND RECIPROCATING MOTION TO SAID OUTPUT SHAFT IN RESPONSE TO ROTATION OF SAID INPUT SHAFT MEANS, SAID MOTION TRANSMITTING MEANS INCLUDING A SECONDARY SHAFT OPERATIVELY CONNECTED TO SAID INPUT SHAFT MEANS TO ROTATE THEREWITH AND OPERATIVELY CONNECTED TO SAID OUTPUT SHAFT TO IMPART AND ROTATING AND RECIPROCATING MOTION THERETO, AND MEANS CONNECTING SAID OUTPUT SHAFT TO SAID SHAKE RAIL TO IMPART SWINGING MOTION TO SAID SHAKE RAIL ON EITHER SIDE OF SAID CENTRAL POSITION IN ACCORDANCE WITH THE RECIPROCATING STROKE OF SAID OUTPUT SHAFT.