Step by step feed means with a dashpot

Claim 1

IN A RECIPROCATORY MACHINE TOOL, A SPINDLE MEANS RECIPROCATORY TOWARDS AND AWAY FROM A WORKPIECE, SAID SPINDLE MEANS ADAPTED TO RECEIVE A TOOL FOR PERFORMING MACHINING OPERATIONS ON SAID WORKPIECE WHEN ENGAGING SAID WORKPIECE AND WHEN MOVING WITH SAID SPINDLE IN A FIRST DIRECTION, POWER MEANS FOR ADVANCING SAID RETRACTING SAID SPINDLE MEANS, A DASHPOT MEANS HAVING A PLUNGER OPERABLE BY SAID SPINDLE MEANS WHILE SAID TOOL IS IN ENGAGEMENT WITH SAID WORKPIECE TO REDUCE THE RATE OF MOVEMENT OF SAID SPINDLE MEANS IN AN ADVANCING DIRECTION, A ONE WAY CONNECTING MEANS ON SAID SPINDLE MEANS ADAPTED TO ENGAGE SAID PLUNGER WHEN SAID SPINDLE MEANS MOVES IN SAID ADVANCING DIRECTION, SAID ONE WAY CONNECTING MEANS BEING INEFFECTIVE TO MOVE SAID PLUNGER WHEN SAID SPINDLE MOVES IN A RETRACTING DIRECTION, ELECTRICAL CONTROL MEANS FOR SAID POWER MEANS TO CAUSE RECIPROCATION OF SAID SPINDLE MEANS IN A FIRST DIRECTION TOWARD SAID WORKPIECE AND TO CAUSE SAID POWER MEANS TO RETRACT SAID SPINDLE MEANS, SAID ELECTRICAL CONTROL MEANS INCLUDING TIMING MEANS FOR OPERATING SAID ELECTRICAL CONTROL MEANS TO CONTROL SAID POWER MEANS TO MOVE SAID SPINDLE MEANS IN CYCLIC MOVEMENTS IN SAID ADVANCING DIRECTION AND IN SAID RETRACTING DIRECTION TO CAUSE SUCCESSIVE MACHINING OPERATIONS ON SAID WORKPIECE, FIRST SWITCH MEANS IN SAID ELECTRICAL CONTROL MEANS OPERABLE TO DISABLE SAID TIMING MEANS TO PREVENT SAID CYCLIC MOVEMENTS OF SAID SPINDLE MEANS BY SAID TIMING MEANS AND TO ENABLE SAID ELECTRICAL CONTROL MEANS TO OPERATE SAID POWER MEANS TO MOVE SAID SPINDLE MEANS IN THE ADVANCING DIRECTION, AND SECOND SWITCH MEANS IN SAID ELECTRICAL CONTROL MEANS TO DETECT MOVEMENT OF SAID SPINDLE MEANS TO A PREDETERMINED POSITION IN SAID FIRST DIRECTION TO CAUSE OPERATION OF SAID POWER MEANS TO RETRACT SAID SPINDLE MEANS, AND FLUID ACTUATED MEANS CONTROLLED BY SAID SECOND SWITCH MEANS TO RETURN SAID PLUNGER OF SAID DASHPOT MEANS TO ITS ORIGINAL POSITION WHEN SAID SPINDLE MEANS HAS REACHED SAID PREDETERMINED POSITION, SAID PREDETERMINED POSITION CORRESPONDING TO THE COMPLETION OF THE MACHINING OPERATIONS ON SAID WORKPIECE.