https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=86074&pn=3,416,407 Loading Apparatus for Reciprocating and RotatingShaft Patentees: Howard W. Renner - Worcester, Worcester County MA , Herbert R. Uhtenwoldt - Worcester, Worcester County MA Granted:1968-12-17
Assigned to Heald Machine Co. - Worcester, Worcester County MA

Abstract: This invention has to do with a loading apparatus arranged to introduce workpieces into the operating area of a work machine tool and consisting of a shaft which is both slidably and rotatably carried in the machine tool housing, separate actuators are provided for rotating and sliding the shaft and means is provided to cause these actuators to operate in a cycle for the loading operation. The art of loading workpieces into a machine tool has received a considerable amount of attention in recent years. This is because, generally speaking, the time in which loading takes place is a time when the machine is not productive; it is important, therefore, from the point of view of economics, to reduce this time to a minimum. One such mechanism which is particularly useful for loading the outer races of ball bearings into an internal grinding machine is shown in the patent application of Uhtenwoldt, Ser. No. 533,904, filed Mar. 14, 1966; in this construction, a loading plug is automatically moved longitudinally and rotatably about a longitudinal axis from a low position in alignment with the machine chuck to an upper position in alignment with the workpiece chute pickup point. The loading apparatus is operated automatically by use of a sequential valve which shifts fluid from one operating cylinder to another of the mechanism. Although this apparatus operates effectively, it is expensive, because of the many hydraulic lines that are necessary. With such a complex electrohydraulic control, a certain "amount of time is involved because of the long hydraulic lines which add hydraulic response time to the system. These and other difficulties experienced with the prior art devices have been obviated in a novel manner by the present invention. Claim: A loading apparatus, comprising (a) a base, (b) a shaft slidably and rotatably carried in the base, (c) an arm extending laterally from one end of the shaft and having a workpiece-holding means located a substantial distance from the shaft, (d) a first actuator for rotating the shaft, (e) a second actuator for sliding the shaft, (f) means causing the actuators to move the shaft and the workpiece-holding means in a cycle to successive positions relative to the base, and (g) stop means assuring that the workpiece-holding means has reached one of the said positions before it starts to move to the next successive position in the cycle, the stop means being provided for assuring that the rotative movement of the shaft does not extend beyond a predetermined range and consisting of a cam follower extending from the shaft and a cam plate associated with the base and having guide surfaces to be contacted by the cam follower, the cam plate being a curved plate arranged concentrically of the shaft, the cam follower comprising a roller arranged with its axis perpendicular to the shaft axis, and the guide surfaces comprising edges of the plate such as would Abe generated by a radial line moved first axially only a short distance, secondly radially and axially to generate the inner end of a slot, thirdly axially only a second distance less than the first distance, fourthly radially only through a substantial angle, fifthly axially only a distance equal to the second distance, sixthly axially and radially to generate the inner end of a slot, and seventhly axially only a distance equal to the first distance.
This is one of 85,364 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=18273&pn=314,625 Calipers and Dividers Patentee: Oscar Stoddard - Detroit, Wayne County MI Granted:1885-03-31
Manufactured by J. Stevens Arms & Tool Co. - Chicopee Falls, Hampden County MA

Abstract: The object of my present invention is to construct a compass (for mechanical purposes) that will be durable and may be readily adjusted to meet all the requirements necessary to the complete workings of an implement of this class and my present invention consists in the arrangement or combination of parts, and in the novel way of attaching to and operating or adjusting the position of the legs proper of a compass. Claim: In combination with the legs of a compass, the adjusting-arms pivotally attached to said legs by means of the metal yokes D, having arms t t, and set-screws, as specified, said adjusting-arms secured at their upper end by a set-screw.
This is one of 85,364 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=86075&pn=55,617 Improved machine for sharpening horseshoe-calks Patentee: Ensign A. Bushnell - Dodge County Wisconsin Granted:1866-06-19

One of these appeared on Patrick's monthly tool lists
This is one of 85,364 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=86073&pn=3,694,971 Guard System for High Speed Grinder Patentees: Howard W. Renner - Cincinnati, Hamilton County OH , John A. Moores - Cincinnati, Hamilton County OH Granted:1972-10-03
Assigned to Cincinnati Milacron, Inc. - Cincinnati, Hamilton County OH

Abstract: A first shield is disposed above a workpiece and adjacent thereto to protect the operator of a grinding machine during a grinding operation from any fragments of an exploding grinding wheel. During loading and unloading of the workpieces, the first shield is pivoted away from the grinding position of the workpiece, and a second shield is disposed between the workpiece and the grinding wheel to protect the operator during loading and unloading operations. The first shield has a coolant supplied thereto for cooling the grinding wheel; this coolant serves as an energy absorber if any fragment of an exploding grinding wheel strikes the first shield. Claim: In a grinding machine having: a base; a wheel slide supported on said base for translational movement relative to a workpiece to be ground, said slide having a grinding wheel and a guard substantially enclosing said grinding wheel supported thereby; means on said base to support the workpiece to be ground; means cooperating with said grinding wheel and disposed above the workpiece in a grinding position during grinding of the workpiece by said grinding wheel to prevent any fragments of said grinding wheel in the event of a failure of said grinding wheel from escaping from between the top of the workpiece and said guard; and means to move said cooperating means from the grinding position to a workpiece loading position toward said grinding wheel only when said grinding wheel is withdrawn from engagement with the workpiece by said slide for loading and unloading of workpieces.
This is one of 85,364 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=86072&pn=3,599,376 Apparatus for Automatic Grinding Patentees: Howard W. Renner - Cincinnati, Hamilton County OH , Rolf Grzymek - Cincinnati, Hamilton County OH Granted:1971-08-17
Assigned to Cincinnati Milacron, Inc. - Cincinnati, Hamilton County OH

Abstract: A grinding wheel is moved to a reference position by a hydraulic piston, which carries a stepping motor therewith. The stepping motor advances the grinding wheel into the workpiece at varying rates and for various distances depending on the desired size of the workpiece. After completion of advancement of the grinding wheel into the workpiece, the grinding wheel may be retracted to a predetermined distance before dwell occurs. Claim: A mechanism for producing relative movement toward and away from each other between a tool of a machine tool and a workpiece comprising: a feed member; fluid-responsive means including: a housing having a chamber therein; and a piston disposed in said chamber in said housing to produce relative translational movement between said housing and said piston when fluid is supplied to said chamber; said piston having means to rotatably support said feed member; first means connecting said piston to said feed member; said first connecting man including motive means to rotate said feed member relative to said fluid-responsive means; means to prevent relative rotation between said motive means and said housing; said means to connect one of said feed member and said housing to the movable one of the workpiece and the tool and to connect the other of said feed member and said housing to a fixed structure; and said second connecting means including means to convert rotational movement of said feed member to translational movement of the movable one of the workpiece and the tool; said motive means rotating said feed member both independently of movement of the movable one of said piston and said housing due to fluid supplied to said chamber and simultaneously therewith.
This is one of 85,364 patents currently in the database at datamp.org

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