Tapering mechanism for roll-grinding machines

Claim 1

A ROLL-GRINDING MECHANISM COMPRISING A SUPPORTING BED, WORK-SUPPORTING MEANS THEREON, A MAIN CARRIAGE MOUNTED ON THE BED FOR RECIPROCATING MOVEMENT, A TAPERING CARRIAGE, MEANS FOR PIVOTALLY MOUNTING SAID TAPERING CARRIAGE ON SAID MAIN CARRIAGE FOR SWINGING MOVEMENT ABOUT AN AXIS TRANSVERSE TO THE DIRECTION OF TRAVEL OF THE MAIN CARRIAGE AND FOR SLIDING RECIPROCATING MOVEMENT RELATIVELY TO THE MAIN CARRIAGE, A SUBBASE MOUNTED ON THE TAPERING CARRIAGE FOR SLIDING MOVEMENT TOWARD AND FROM THE WORK, MEANS FOR EFFECTING THE LAST-NAMED SLIDING MOVEMENT COMPRISING AN AXIALLY FIXED SCREW CARRIED BY THE TAPERING CARRIAGE AND COOPERATING WITH A NUT CARRIED BY THE SUBBASE, MEANS FOR EFFECTING SAID SLIDING MOVEMENT OF THE TAPERING CARRIAGE INCLUDING A PINION CARRIED BY THE TAPERING CARRIAGE AND COOPERATING WITH A RACK CARRIED BY SAID MEANS FOR MOUNTING THE LAST-NAMED CARRIAGE, A GRINDING-WHEEL-CARRYING HEAD PIVOTALLY MOUNTED ON THE SUBBASE, MEANS FOR MOVING SAID HEAD ABOUT ITS PIVOT COMPRISING A LEVER HAVING A FULCRUM ON THE SUBBASE AND HAVING A PART ENGAGING SAID HEAD TO MOVE THE LATTER, CROWNING MEANS FOR MOVING SAID LEVER ABOUT THE FULCRUM THEREFOR TO SWING THE HEAD TOWARD AND AWAY FROM THE WORK, MEANS TO SWING THE HEAD TOWARD AND AWAY FROM THE WORK INDEPENDENTLY OF THE CROWNING MEANS AND ACTING ON SAID LEVER, SAID MEANS FOR EFFECTING SLIDING MOVEMENT OF THE TAPERING CARRIAGE BEING OPERATIVE ONLY WHEN THE MAIN CARRIAGE IS AT REST, AND MEANS FOR RECIPROCATING THE MAIN CARRIAGE.