bruet

Claim 1

IN A MACHINE-TOOL PROVIDED WITH A FEED-CONTROL BOX INCLUDING A CASING, A DRIVING SHAFT, A DRIVEN SHAFT, AN INTERMEDIARY SHAFT, ALL SAID SHAFTS BEING PARALLEL AND LOCATED IN SAID CASING, A SLIDING PINION ADAPTED TO SLIDE ALONG SAID INTERMEDIARY SHAFT, A CARRIER JOURNALED IN SAID BOX TO BE CAPABLE OF BEING SWUNG ABOUT THE AXIS OF SAID DRIVING SHAFT AND BY WHICH SAID INTERMEDIARY SHAFT IS ROTATABLY CARRIED, AN ELONGATED PINION SECURED ONTO SAID DRIVING SHAFT AND REMAINING ENGAGED WITH SAID SLIDING PINION IN A PLURALITY OF POSITIONS OF THIS LATTER ALONG ITS SHAFT, A PLURALITY OF TOOTHED WHEELS HAVING DIFFERENT DIAMETERS SECURED ON SAID DRIVEN SHAFT AND WITH WHICH SAID SLIDING PINION CAN BE BROUGHT SELECTIVELY INTO ENGAGEMENT, A CONTROL MEMBER BY MEANS OF WHICH SAID CARRIER CAN BE SWUNG AND LOCKING MEANS WHEREBY SAID SLIDING PINION CAN BE RETAINED SELECTIVELY IN ANY ONE OF THE AFORESAID PLURALITY OF POSITIONS, A DEVICE FOR SHIFTING SAID SLIDING PINION ALONG SAID INTERMEDIARY SHAFT AND COMPRISING MOTION TRANSMITTING MEANS FROM SAID CARRIER TO SAID SLIDING PINION, SO AS TO IMPART TO THE LATTER A SHIFTING MOTION ALONG ITS SHAFT IN RESPONSE TO A SWINGING MOTION IMPARTED BY SAID CONTROL MEMBER TO SAID CARRIER AND IN DEPENDANCE ON THE SWINGING STROKE OF THE LATTER SO THAT THE POSITION OF THE SLIDING PINION ON ITS SHAFT WILL DEPEND ON THE POSITION OF SAID CONTROL MEMBER AND THEREFORE ON THE POSITION OCCUPIED BY SAID INTERMEDIARY SHAFT ON THE CIRCULAR PATH WHICH THE SAID SHAFT IS MADE TO DESCRIBE AS A RESULT OF THE SWINGING MOTION OF THE SAID CARRIER, SO THAT THE AXIAL SHIFTING OF THE SLIDING PINION INTO ANY DESIRED POSITION FOR ENGAGEMENT WITH ANY ONE OF THE DRIVEN WHEELS WILL BE CARRIED OUT BY A SINGLE AND CONTINUOUS MOVEMENT IMPARTED TO SAID CONTROL MEMBER IN ONE GIVEN DIRECTION.