Constaint mesh transmission and automatic brake therefor

Claim 1

THE COMBINATION COMPRISING A TRANSMISSION HAVING FOUR SPEEDS IN THE FORWARD DIRECTION AND THREE SPEEDS IN THE REVERSE DIRECTION, SAID TRANSMISSION INCLUDING A FIXED HOUSING, A ROTATABLE POWER INPUT SHAFT, A ROTATABLE POWER OUTPUT SHAFT, A FIRST COUNTERSHAFT, A SECOND COUNTERSHAFT, A THIRD COUNTERSHAFT AND A MAIN SHAFT, SAID COUNTERSHAFTS AND SAID MAIN SHAFT ARRANGED IN PARALLEL SPACED RELATION TO EACH OTHER WITHIN SAID HOUSING, SAID COUNTERSHAFTS ADAPTED TO ROTATE IN BOTH DIRECTIONS, CONSTANT MESH GEARING INCLUDING A PAIR OF DIRECTIONAL GEARS, CONNECTING GEARS AND A PLURALITY OF CHANGE SPEED GEARS, SAID CONNECTING GEARS ARRANGED TO DRIVINGLY CONNECT SAID THREE COUNTERSHAFTS TO EACH OTHER FOR ROTATION TOGETHER, A PAIR OF DIRECTIONAL CLUTCHES, A PLURALITY OF CHANGE SPEED CLUTCHES AND A PAIR OTHER CLUTCHES, SAID INPUT SHAFT CONNECTED TO ONE OF SAID OTHER CLUTCHES, SAID OUTPUT SHAFT CONNECTED TO THE SECOND OF SAID OTHER CLUTCHES, SAID DIRECTIONAL CLUTCHES ADAPTED UPON SELECTIVE ENGAGEMENT TO TRANSMIT ROTATION OF SAID DIRECTIONAL GEARS TO SAID INTERCONNECTED COUNTERSHAFTS IN A PREDETERMINED DIRECTION, SAID CHANGE SPEED CLUTCHES ARRANGED UPON SELECTIVE ENGAGEMENT TO TRANSMIT ROTATION OF SAID INTERCONNECTED COUNTERSHAFTS TO SAID OUTPUT SHAFT TO THEREBY PROVIDE A PLURALITY OF OUTPUT SHAFT SPEEDS HAVING FIXED RATIOS TO SAID INPUT SHAFT SPEEDS, SAID OTHER CLUTCHES ADAPTED UPON ENGAGEMENT TO TRANSMIT ROTATION FROM SAID INPUT SHAFT THROUGH SAID MAIN SHAFT TO SAID OUTPUT SHAFT TO PROVIDE IN THE FORWARD DIRECTION AN ADDITIONAL OUTPUT SHAFT SPEED HAVING A FIXED RATIO TO SAID INPUT SHAFT SPEED, BRAKE MEANS ACTUATABLE TO EXERT A BRAKING FORCE UPON SAID TRANSMISSION OUTPUT SHAFT, ACTUATING MEANS FOR SAID BRAKE MEANS, SAID ACTUATING MEANS INCLUDING SPEED RESPONSIVE MEANS OPERATIVELY CONNECTED TO SAID INPUT SHAFT, SAID ACTUATING MEANS OPERATIVELY CONNECTED TO SAID BRAKE MEANS, SAID SPEED RESPONSIVE MEANS BEING RESPONSIVE TO THE SPEED OF SAID TRANSMISSION INPUT SHAFT TO CAUSE SAID ACTUATING MEANS TO ACTUATE SAID BRAKE MEANS WHEN SAID INPUT SHAFT SPEED EXCEEDS A PREDETERMINED SPEED.