Traverse control means for power tool

Claim 1

IN COMBINATION WITH A STATIONARY POWER TOOL INCLUDING A MANUALLY-RECIPROCABLE TOOL CARRIAGE HAVING A CUTTING STROKE AND A RETURN STROKE, TRAVERSE CONTROL MEANS FOR THE CARRIAGE, COMPRISING: (A) A CYLINDER AND MEANS TO MOUNT THE CYLINDER ON THE STATIONARY POWER TOOL AND TO ALIGN ITS AXIS WITH THE AXIS OF RECIPROCATION OF THE TOOL CARRIAGE; (B) A PISTON RECIPROCATION IN SAID CYLINDER; (C) A TUBULAR PISTON ROD SECURED TO ONE SIDE OF SAID PISTON AND PROJECTING BEYOND ONE END OF SAID CYLINDER; (D) MEANS TO COUPLE SAID PISTON ROD TO THE TOOL CARRIAGE FOR RECIPROCATION IN UNISON; (E) SAID CYLINDER BEING COMPLETELY FILLED WITH A FLUID ON BOTH SIDES OF SAID PISTON; (F) FLUID PASSAGE MEANS FORMED IN SAID PISTON AND COMMUNICATING ONE SIDE OF SAID PISTON WITH THE OTHER SIDE OF SAID PISTON; (G) RESILIENTLY-BIASED VALVULAR MEANS NORMALLY CLOSING SAID FLUID PASSAGE MEANS, SAID VALVULAR MEANS BEING OPENED TO ADMIT FLUID TO THE PISTON ROD SIDE OF SAID PISTON ONLY ON THE RETURN STROKE OF THE TOOL CARRIAGE; (H) AUXILIARY FLUID PASSAGE MEANS FORMED IN SAID PISTON, COMMUNICATING ONE SIDE OF SAID PISTON WITH THE OTHER SIDE OF SAID PISTON, AND INCLUDING A VALVE SEAT; (I) AN AXIALLY-MOVABLE ADJUSTING ROD WITHIN SAID TUBULAR PISTON ROD AND HAVING A CONICAL TIP COOPERATING WITH SAID VALVE SEAT TO FORM AN ORIFICE, THEREBY RESTRICTING THE FLOW OF FLUID FROM THE PISTON ROD SIDE OF SAID PISTON AND THROUGH SAID PISTON ON THE CUTTING STROKE OF THE TOOL CARRIAGE, AND THEREBY REGULATING THE MAXIMUM RATE OF TRAVERSE OF THE TOOL CARRIAGE ON ITS CUTTING STROKE; AND (J) MANUALLY-MANIPULATABLE MEANS TO ADJUST THE AXIAL POSITION OF SAID ADJUSTING ROD, WHEREBY THE ORIFICE IS VARIABLE, AND WHEREBY THE TRAVERSE CONTROL MEANS MAY BE ADJUSTED FOR THE OPTIMUM CUTTING OF DIFFERENT MATERIALS.