Surface conditioning grinding machine

Claim 1

IN A MACHINE FOR CONDITIONING THE SURFACE OF AN ELONGATED WORKPIECE SUCH AS BILLET, MEANS PROVIDING A WORK-SUPPORTING STRUCTURE FOR THE WORKPIECE, TRACK RAILS CHANNEL-SHAPED IN CROSS-SECTION AND HAVING OUTWARDLY ING STRUCTURE AND EXTENDING LENGTHWISE THEREOF, A MAIN CARRIAGE ADAPTED TO TRAVEL ON THE REAR TRACK RAIL, A TAILSTOCK CARRIAGE ADAPTED TO TRAVEL ON THE FRONT TRACK RAIL, A PAIR OF OVERHEAD PARALLEL GUIDE RAILS OVERLYING AND EXTENDING TRANSVERSELY OF THE SUPPORTING STRUCTURE, HAVING THEIR REAR ENDS SECURED TO AND SUPPORTED ON SAID MAIN CARRIAGE AND HAVING THEIR FORWARD ENDS SECURED TO AND SUPPORTED ON THE TAIL STOCK CARRIAGE, REVERSIBLE MOTOR MEANS FOR IMPELLING THE MAIN CARRIAGE ALONG THE REAR TRACK RAIL SELECTIVELY IN OPPOSITE DIRECTIONS, THUS SHIFTING THE MAIN CARRIAGE, GUIDE RAILS AND TAIL STOCK CARRIAGE BODILY AS A UNIT LENGTHWISE OF THE SUPPORTING STRUCTURE, A BOOM CARRIAGE SLIDABLE IN A FORWARD AND REARWARD DIRECTION ON SAID OVERHEAD GUIDE RAILS, A BOOM ASSEMBLY PIVOTED FOR ROCKING MOVEMENTS ON SAID BOOM CARRIAGE ABOUT A HORIZONTAL AXIS EXTENDING LENGTHWISE OF THE WORK-SUPPORTING STRUCTURE, SAID BOOM ASSEMBLY INCLUDING A BOOM HOUSING, A BOOM RIGIDLY SUPPORTED ON THE BOOM HOUSING AND PROJECTING FORWARDLY AND DOWNWARDLY THEREFROM, A GRINDING HEAD MOUNTED ON THE FORWARD END OF THE BOOM FOR LIMITED OSCILLATING MOVEMENTS ABOUT THE LONGITUDINAL AXIS OF THE BOOM AND INCLUDING A ROTATABLE DRIVEN GRINDING WHEEL, AND A DRIVE MOTOR OPERATIVELY CONNECTED TO THE GRINDING WHEEL IN DRIVING RELATIONSHIP, REVERSIBLE MOTOR-ACTUATED MEANS FOR EFFECTING ROCKING MOVEMENTS OF THE BOOM ASSEMBLY SELECTIVELY IN OPPOSITE DIRECTIONS, REVERSIBLE MOTORACTUATED MEANS FOR EFFECTING SLIDING MOVEMENTS OF THE BOOM CARRIAGE ON SAID OVERHEAD GUIDE RAILS, AN ELECTRIC MOTOR AND GEAR REDUCTION ASSEMBLY MOUNTED ON THE BOOM, MOVABLE BODILY THEREWITH AND DESIGNED FOR EFFECTING OSCILLATION OF THE GRINDING HEAD, SAID ASSEMBLY INCLUDING AN ECCENTRIC WHEEL, A CRANK ARM EFFECTIVELY CONNECTED TO THE GRINDING HEAD, AND A COUPLING MEMBER OPERATIVELY CONNECTING THE CRANK ARM AND ECCENTRIC WHEEL.