Abstract: A friction welding machine for welding first and second tubular workpieces together comprises a workhead assembly having a rotatable chuck for forcefully displacing the first workpiece into frictional engagement with the second workpiece. The workhead includes a shear mechanism having a shear tool mounted for selected displacement along the chuck's rotational axis. A shear cylinder of the shear mechanism positions the shear tool at a selected ready position within the first tubular workpiece preparatory to a welding operation, advances the shear tool upon completion of the welding operation into the second tubular workpiece thereby shearing the freshly formed internal weld flash, and retracts the shear tool to a remote position after shearing.

Abstract: A control circuit for apparatus stretching a web between intake, discharge, and intermediate pulling stations (20-1, 20-2, 20-3). The circuit includes a first signal generator (32) for providing a signal to the intake discharge station (20-1) corresponding to the desired speed of the web at that station. A multiplier (40) alters the first signal in accordance with the amount of overall stretching, or stretch ratio, desired in the apparatus. The multiplier provides a second signal to the discharge station (20-3) corresponding to the speed of the web at the discharge station necessary to obtain the overall stretching. A second signal generator (48-66) subtracts a selected amount of the difference between the first and second signals from the second signal to provide a third signal to the intermediate pulling station (20-2) that distributes the overall stretching in the apparatus between intermediate zones formed by the adjacent pulling stations.

Abstract: A radial infeed thread roll attachment comprising a pair of jaw elements each having a thread roll mounted at one end and a roller secured on the other end, a housing, pivotally mounting the jaw elements in opposed relation thereon, a cam assembly mounted on the housing and having an inner portion having a wedge-shaped cam element at one end and a threaded member at the other end and an outer portion, a spring for forcefully maintaining the rollers in engagement with the cam element for preventing the rotation of the inner portion when the outer portion is rotated whereby rotation of the outer portion will result in the axial displacement of the inner portion relative to the outer portion, the outer portion having an outer axially fixed element and an inner axially displaceable element threadedly related to the inner portion threaded member, the outer element having an axially extending keyway and the inner element having an axially extending key, a hydraulic cylinder with an air-on-oil hydraulic booster or o

Abstract: A machining center comprising a tool spindle, a tool magazine, a tool shuttle assembly for transferring tools between the tool spindle and the tool magazine including rail means, a tool change mechanism including a carriage, means for mounting the carriage on the rail means for displacement therealong, a dynamically brakeable motor for driving the tool change mechanism along the rail means in a selected direction, means for stopping the tool change mechanism driven in the selected direction including first proximity switch means secured to the carriage at a selected spacing from the rail means for maintaining the condition of the proximity switch means as the carriage is displaced along the rail means, opening means in the rail means at a selected location for changing the condition of the first proximity switch means as the carriage means is displaced in the selected direction along the rail means, second proximity switch means secured to the rail means, the tool change mechanism including a projecting eleme

Abstract: A liquid-cooled eddy-current coupling device is disclosed, having a field coil and rotatable inductor and rotor members within a housing, with the rotor member having a tubular extension with an exterior circumferential groove disposed to direct liquid coolant away from the field coil.

Abstract: A cylindrical lens-prism light-line generating apparatus utilizing a slit-type aperture provides for origination, collimation and projection of a light-line which cooperates with a light localizer beam in aid of aligning an X-ray beam path preparatory to radiography.

Abstract: An improved mandrel chuck for the backstop assembly of a friction welding machine holds a first interiorly lobed workpiece as a second rotating workpiece is displaced into forceful engagement therewith. The improved chuck comprises a main body portion, an end portion rigidly fixed to the main body portion, and an intermediate portion mounted between the main body portion and the end portion, all of the chuck portions having similar exterior lobes in a configuration which complements the interior lobes of the first workpiece. A hydraulic actuator rotates the intermediate portion relative to the main body and end portions to interiorly grip the first workpiece wherein one end of the first workpiece projects from and is proximate to the chuck end portion, whereby the chuck will not contribute to any outward bowing or distortion of the workpiece end.

Abstract: A cylindrical grinding machine comprising chucks for supporting and rotating a workpiece about a selected axis, a wheelhead assembly selectively displaceable transverse to the axis including a rotatable grinding wheel for effecting stock removal from the surface of the rotating workpiece, a workrest assembly including a jaw having a workpiece engaging shoe, and means for selectively displacing the jaw for opposing the deflective force exerted by the grinding wheel on the rotating workpiece as it is machined, and means for monitoring the wear of the jaw including an indicator gauge mounted on the workrest jaw including a visually observable needle, a control arm pivotally secured to the workrest jaw having a first workpiece engaging end and a second end operatively associated with the indicator gauge, the control arm having a first position whereat the control arm first end leads the workrest shoe and a second position whereat the control arm first end is flush with the workrest shoe, and a spring for biasing

Abstract: A cylindrical grinder for effecting stock removal from a cam surface on a workpiece comprising apparatus for supporting the workpiece for rotation about a predetermined axis, grinding assembly including a grinding wheel, apparatus for defining a selected velocity profile for each revolution of the workpiece, the velocity profile having a plurality of acceleration/deceleration segments each having first and second radiused end portions each terminating at one end tangential to the constant velocity direction, the defining apparatus including pulse driven stepping motor apparatus which will rotate the workpiece one complete revolution when issued a predetermined number of pulses, and pulse generating apparatus for driving the stepping motor apparatus including an oscillator for generating a continuous train of pulses at a fixed rate or frequency and divide by N apparatus for defining which pulses of the pulse train will be successively issued to the stepping motor apparatus so as to provide a selected velocity

Abstract: A machining center comprising tool spindle means, tool changing means, tool drum assembly means including first and second axially spaced integral tool drums each having a plurality of tool holding chucks about the periphery thereof, each of the tool holding chucks having a movable jaw, extension means operatively associated with each the movable jaw on one of the first and second tool drums for permitting movement of the associated movable jaw from a predetermined remote location, tool housing means for rotatably supporting the tool drum assembly means including first actuator means for displacing the one of the extension means of the one tool drum located at a selected location, and second actuator means for displacing one of the movable jaws of the other one of the tool drums located at a selected location, means for supporting the tool housing means for axial displacement, and means for axially displacing the tool housing means from a first position to a second position.

Abstract: An X-ray collimator is disclosed having longitudinal and cross shutter assemblies disposed between an input port and an output port. Image area boundaries are defined by two pairs of inner edge portions. Mating inner edge portions of each pair move in an essentially rectilinear path.

Abstract: A water conservation system for a plating line comprising a series of treatment tanks and a plurality of rinse tanks utilizes timed inlets for admitting fresh water to each of the rinse tanks for a short period of time immediately following the introduction of a part into the rinse tanks. A sediment tank receives the discharge from each of the rinse tanks via overflow ducts, and a holding tankreceives overflow from the sediment tank. The contents of the holding tank are transferred to a treatment tank for batch treatment. A logic circuit controls sampling and testing of the treatment tank to determine the PH condition thereof and to initiate the addition of a predetermined amount of an appropriate neutralizer to the treatment tank.

Abstract: A x-ray tube housing assembly is disclosed which includes a manifold for distributing incoming coolant within the housing in the area adjacent the hot zone of the x-ray tube. The manifold preferably comprises a generally tubular conductor circumferentially disposed about a first axis which is generally parallel to the axis of the tube housing.

Abstract: A friction welding machine comprising a clamp assembly for securing a workpiece against rotation including a pair of opposed chuck means for supporting the pair of chuck means for relative horizontal slidable displacement means for controlling the displacement of the pair of opposed chucks so that the pair of chucks will be conjointly and equally displaced means for displacing the pair of chuck means having first and second vertically oriented arms each pivotally secured at a medial location to the supporting means, first and second link means each connected at one end to one of the chuck means for limited pivotal displacement relative thereto, and at the other end pivotally connected to the top of the corresponding arm, and hydraulic cylinder means extending between and pivotally mounted on the bottom of the arms, and a base for supporting the supporting means, the base having opening means for receiving the hydraulic cylinder means.

Abstract: An eddy current coupling has telescoping input (12) and output (18) shafts to form a shunt (72, 74, 76) for the magnetic flux (78a) of the coupling around a bearing (66) between the shafts. This avoids the increased friction and heating effects and the magnetization of the bearing occurring when the bearing is exposed to the flux.

Abstract: A friction welding machine comprising a base including a horizontal way surface, and a plurality of horizontally spaced keyways, an end stop assembly including a housing having roller supports for permitting horizontal displacement of the end stop assembly along the way surface. The device further includes a slide member having keys for matingly engaging with the base keyways and a pair of vertically spaced, horizontally extending, axially spaced end stops. A first member is included for locating the slide member at a lowermost position for locating the upper end stop at a predetermined machining location, a second member is included for locating the slide member at an intermediate position for locating the lower end stop at a predetermined machining location, and a third member is included for locating the slide member at an upper portion whereat the slide keys becomes disengaged from the base keyways whereby the end stop assembly can be horizontally displaced relative to the base.

Abstract: A timing generator for use with multi-phase controlled rectifier systems is disclosed in which a ramp signal is produced in phase synchronization with the power source and compared with the value of a command signal. The command signal is indicative of the desired SCR ignition angle. A sequencing circuit, having a finite number of output states is cyclically stepped from one state to the next by the comparator. The sequence circuit couples a source of SCR-gating pulses to the appropriate SCR in accordance with its state and with a predetermined pattern of SCR ignitions which characterize the multi-phase source.One aspect of the invention concerns the multiplexing of the comparator output whereby the command signal is offset by 60.degree. (electrical) after each comparator transition to set up conditions for the next transition.A further aspect of the invention concerns the generation of an alternate ramp, 180.degree.

Abstract: A loader for a machine tool comprising horizontal track means, shuttle means mounted on the track means for relative horizontal displacement, support means including rigidly secured top, front and back walls, the front and back walls each including a pair of horizontally spaced bores, a pair of shafts selectively sized for insertion into the bores, and means for releasably securing the shafts to the front and back walls to define the bottom wall of the support means, gripper assembly means including first and second gear means each having a central bore for matingly receiving one of the shafts, first and second gripper arm means each having a bore for matingly receiving one of the shafts, means for rigidly securing the first and second gear means to the first and second gripper arm means, respectively, hydraulic cylinder means having a housing including coaxial boss means extending outwardly from the front and back walls thereof and having a selectively advanceable rod means, the first gripper arm means furth

Abstract: An indexable rotary cylindrical magazine has part pockets around the periphery parallel to the magazine axis. A guide supplies parts end-to-end to an entrance end of a pocket in a loading position. A reciprocable feed finger engages the downstream end of any part in a pocket at the loading position to index the magazine to the next pocket only if the part is substantially completely received in that pocket at the loading position. Stripper prongs remove the parts from the filled pockets and supply them side-by-side into a part chute. A utilization machine such as a planetary thread rolling machine has a feed mechanism to receive parts from the chute exit and feed them into the threading area. The feed mechanism has feed-in, retract and a dwell range and the parts have approximately twice the length of time to be received in a pocket at the loading position as the time duration of said dwell range.

Abstract: A cylindrical grinding machine comprising a workholding assembly for holding a workpiece having inner and outer diameters for rotation about its axis, and wheelhead means including first cylindrical grinding wheel assembly means including a grinding wheel for grinding the outer diameter of a cylindrical workpiece held by the workholding assembly, second pivotally mounted cylindrical grinding wheel assembly means for grinding the inner diameter of a cylindrical workpiece held by the workholding assembly, means including a two direction hydraulic motor for pivotally displacing the second cylindrical grinding wheel assembly means from a raised remote position to a grind position for maintaining the second cylindrical grinding wheel assembly means at the grinding position, and means for locating the second cylindrical grinding wheel assembly at a precise axial position as the second cylindrical grinding wheel assembly is pivotally displaced to the grinding position including a key and keyway for matingly engaging