https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=84722&pn=2,519,477 Power Hammer Patentee: Frederick H. Kind - Racine, Racine County WI Granted:1950-08-22
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: The invention relates to percussion tools, and more particularly to a reciprocatory or power hammer. One object of the invention is to improve upon reciprocatory hammers of the spring driven type by providing a double spring connection between the rotary driven shaft and the hammer associated with means for limiting the whip of the springs and thus greatly prolonging the useful life of the tool. It has been found in practice that where a single freely whippable spring is provided as a drive connection for the hammer, that frequent breakage of the spring occurs and that such a tool is commercially impracticable. Claim: In a device of? the character described, the combination off a rotary drive shaft, a reciprocatory hammer, a drive connection between said shaft and hammer including a compression spring and releasable detents normally engageable with said hammer to arrest its movement until released by an increase of tension in said spring, said hammer adapted to have impact engagement with a tool.
This is one of 84,020 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84721&pn=2,519,476 Boring Apparatus Patentee: Frederick H. Kind - Racine, Racine County WI Granted:1950-08-22
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: The object of the invention is to provide an eccentrically adjustable boring bar and control means for the same whereby roughing, semi-finishing, and finishing boring operations with a single bar provided with a plurality of cutters may be readily accomplished. A further object of the invention is to provide a pivotally mounted boring bar mounted on a spindle provided with a sliding actuating sleeve or cam for angularly shifting the cutters of the bar and holding them in an adjusted position, the shifting mechanism for said bar including a member adapted to be moved to predetermined set positions. Claim: In a boring apparatus in which the work and a boring member are given a reciprocatory and rotary movement relative to each other, the combination with said boring member provided with relatively fixed roughing and finishing cutters projecting from diametrically opposite sides of said member, of a support for pivotally mounting said member for eccentric positioning relative to the work, means for angularly shifting said member about its pivot in diametrically opposite directions comprising a shiftable sleeve cam member operatively engageable with a part of said boring member, and means for longitudinally shifting said cam member in opposite directions to shift said boring member with its cutters in diametrically opposite directions to bring the different cutters successively into operative relation with the wall of the work being bored.
This is one of 84,020 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84720&pn=2,296,647 Hydraulic Pressure Booster Patentee: John H. McCormick - Racine, Racine County WI Granted:1936-12-15
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: The invention relates to pump governors and more particularly to a governor for controlling the output of a rotary vane type hydraulic pump. The object of the invention is to provide a simple mechanist for automatically governing the eccentricity of the outer barrel of a vane type rotary hydraulic pump, so that the pressure of the fluid furnished by the pump will be substantially constant. Claim: In a hydraulic booster having a cylinder, a motor piston operating in said cylinder and a reversing valve for alternately respectively connecting opposite ends of said cylinder with a source of hydraulic pressure fluid and exhaust, the combination with said piston and said valve of a pair of control Valves for said reversing valve, means for operating said control valves alternately by the piston as it reaches the end of its stroke, hydraulically operated means for returning said control valves, and means for hydraulically interlocking said control valves to prevent their movement except at the end stroke positions of the movement of the piston, said valves in turn preventing movement of the reversing valve until one of said valves has been operated and the other has been moved to a position for actuation by the piston on its return stroke.
This is one of 84,020 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84719&pn=2,064,421 Pump Governor Patentee: Marcolm E. Erskine - Racine, Racine County WI Granted:1936-12-15
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: The invention relates to pump governors and more particularly to a governor for controlling the output of a rotary vane type hydraulic pump. The object of the invention is to provide a with a rod, which extends through a bore simple mechanism for automatically governing the eccentricity of the outer barrel of a vane type rotary hydraulic pump, so that the pressure of the fluid furnished by the pump will be substantially constant. Claim: The combination with a pump having a rotor provided with vanes and a barrel cooperating with said vanes and rotor to form a plurality of pumping compartments, said barrel being shiftable to vary the eccentricity of the pump, a support, a cylinder on said support and connected with the discharge of said pump, a piston working in said cylinder in response to discharge pressure and directly connected to said barrel to shift said barrel toward a position of zero eccentricity, a spring opposing the movement of said piston by the pressure fluid, means including a part of said piston to vary the tension of said spring and a member adjustably mounted on said support for limiting the eccentric position of said barrel.
This is one of 84,020 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84717&pn=1,790,550 Grinding Machine Patentee: Maxwell I. Mathewson - Providence, Providence County RI Granted:1931-01-27
Manufactured by Brown & Sharpe Mfg. Co. - Providence, Providence County RI
Assigned to Brown & Sharpe Mfg. Co. - Providence, Providence County RI

Abstract: The invention relates to grinding machines and more particularly to that type of machine in which the grinding wheel is mounted on a carriage to move toward and away from the work and the work is mounted on a work supporting table to move back and forth longitudinally of the grinding wheel spindle. The objects of the invention are to reorganize and improve the construction and operation of the several cooperating elements of a grinding machine to secure a smoother and more efficient operation of the machine, to eliminate all unnecessary shock or jar in starting and stopping the work supporting carriage, to increase the speed at which machines of this type may be operated, to extend still further the automatic operation of the several cooperating elements, and finally to secure a more adequate control of these elements by the operator. Claim: A grinding machine having, in combination, a reciprocating table for supporting the work, a table drive, a reversing mechanism for controlling the reciprocation of the table from the table drive, mechanism for imparting a dwell in the movement of the table at each end of its reciprocating movement, and means for cushioning the movement of the table drive to move the table in an opposite direction.
This is one of 84,020 patents currently in the database at datamp.org

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