Abstract: An optical element can be adjusted using a displacement element in an actuator assembly. The actuator assembly includes a plurality of lead screws and a mechanical linkage configured to simultaneously rotate the lead screws. The actuator assembly further includes a displacement element configured to act upon the optical element, through translational motion of the displacement element in response to rotation of the lead screws. Multiple optical elements can be adjusted simultaneously using respective displacement elements. In some embodiments, a controller determines a target position for at least one displacement element, where the target position is configured to provide a desired optical characteristic such as an optical power. The controller can apply power to the actuator to move the at least one displacement element. The controller can also shut off power upon detecting that the at least one displacement element has reached the target position or an end-of-travel position.

Abstract: A rail shoe assembly for mounting a drilling machine to a rail of a railway track, with the drilling machine including a drill, a cutter, and a support frame with the support frame mounted to the rail, includes a base adapted to be positioned with respect to the rail and adapted to be coupled to the support frame. The rail shoe assembly also includes an adjustable bar coupled to and slideable relative to the base. The adjustable bar has a bottom edge for engagement with the rail. The adjustable bar defines a plurality of position indicators and the base defines a plurality of mounting chambers. At least one of the plurality of position indicators and at least one of the plurality of mounting chambers are alignable at a predetermined position for positioning said base relative to the rail such that the drill and cutter are positioned relative to the rail.

Abstract: A printed circuit board (PCB) drilling apparatus that greatly increases the speed, accuracy and depth of the drilling process as well as increasing the life of the drill bits by decoupling the reactionary forces encountered in the positioning and drilling functions of the apparatus in the x, y and z axes from the components that accomplish the positioning, measuring and drilling of the stacked printed circuit boards. The part of the apparatus that moves and drills as well as the feedback position sensors are mounted to a set of vibration isolation pads that absorb the vibrations that would disturb the feedback sensors. Additionally, the force frame of the apparatus that experiences the reactionary force movements are decoupled from the metrology frame of the apparatus that house the feedback sensors, also increasing the throughput and accuracy.

Abstract: A pressure detection passage and a side edge of a pressure detection member are positioned for a tip of a stylus attached to a drilling device by holding the pressure detection member on a hand-operated stage and moving the pressure detection member in the X axis direction by a micrometer head of the hand-operated stage while checking an enlarged image picked up by a microscope and displayed on a monitor, and a personal computer stores positions of the side edge of the pressure detection member and the pressure detection passage which are measured by scales of the micrometer head.

Abstract: The invention provides a machining apparatus, and its machining method, having machining tables whose weight do not increase so much even if a number of machining sections such as spindles is increased. One of the machining tables is a rectangular stationary table having a groove in the direction perpendicular to the longitudinal direction on its surface and the other is a rectangular movable table engaged with the groove. The machining apparatus machines a printed circuit board, whose area is larger than that of the movable table, on a mounting surface of the stationary table by changing position of the printed circuit board by moving the movable table and by determining machining position by moving a spindle at position facing the mounting surface of the stationary table.

Abstract: A drill press has a housing, base and support shaft. The support shaft has a vertical first axis and a lower end supporting the base and an upper end supporting the housing. The housing includes a bit rotatable about a vertical second axis. A first lower plate is coupled to the support shaft. The connector is adjustable for varying the angular orientation of the first lower plate about a horizontal third axis. The first lower plate has an upper surface with a downwardly extending groove transverse to the third axis. A first upper plate has a lower surface with a downwardly extending projection slidable within the recess. A locking bolt is adapted to secure the upper plate with respect to the lower plate. The upper plate has an upper surface with a plurality of threaded apertures for securing a workpiece to be drilled.

Abstract: A drill press has a bit, a base and a support shaft with a lower end supported by the base and an upper end supporting the housing. A lower plate with a connector coupled between the lower plate and the support shaft varies the angular attitude of lower plate with respect to the bit. An upper plate with threaded apertures, recesses, blocks and bolts secures the upper plate in preselected planar positions with respect to the lower plate. Aligned central apertures in the plates with a pivot pin provide a plurality of preselected rotational orientations of the upper plate with respect to the lower plate.

Abstract: A drill press including a base, a column mounted on the base, and a head assembly connected to the column. Wherein the head assembly includes a power device and a drill bit rotatably driven by the power device, the drill press further includes first and second worktables, and a changeover mechanism disposed between the first and the second worktables for selectively securing the first or second worktable located at working position. The changeover mechanism can alternatively rapidly adjust the first and the second worktables to working position so as to permit the operator to select either the first worktable or the second worktable according to the shape of workpiece, saving the trouble of a special tooling disassembly.

Abstract: A double-spindle machine tool comprises two tool-holder spindles and two work holding fixtures allocated thereto. A work holding fixture comprises a work carrier plate which supports itself on an adjustable abutment. This abutment is adjusted by means of an adjusting device in dependence on changes in the distance of the axes of rotation of the tool-holder spindles.

Abstract: The present invention relates to a method and apparatus for drilling holes in lenses for making “rimless and pierced-lens” spectacles. According to the invention, the apparatus comprises: a bed (11) carrying a numerically-controlled drill (12) whose drill tool (15) is set on a vertical axis; a reference pointer (30, 33) mounted on the bed (11) to be movable between an active position in which it bears against a lens and a retracted position in which it leaves the lens clear; and a lens support (50) arranged to hold the lens (V) in a substantially horizontal plane, said support resting on a surface (20) that is secured to or integral with the above-mentioned bed (11) while the position of said support can be held stationary relative to said surface.

Abstract: An optical lens drill press outfitted with specialized lens holding and displacement platform assemblies that allow the user to manipulate the angle and hold lenses in position, whereby selected areas pre-designated for the fabrication of apertures can be produced at precision angles and sizes typically perpendicular to the curvature lens of the lens.

Abstract: A drilling device for frameless glasses with a drill head (34), which can be moved up and down. The drill head (34) can be inclined to either side and a holding device (50, 56, 58) is provided for the two lenses of a pair of glasses, in which holding device (50, 56, 58) the opposite edge regions of the lenses are accessible to the drill bit of the dual head (34).

Abstract: A drilling device for frameless glasses with a drill head (34), which can be moved up and down. The drill head (34) can be inclined to either side and a holding device (50, 56, 58) is provided for the two lenses of a pair of glasses, in which holding device (50, 56, 58) the opposite edge regions of the lenses are accessible to the drill bit of the dual head (34).

Abstract: A dowel hole and slot cutter comprise a motor having a base slidably mounted on a track and a cylindrical cutting bit mounted at one end of the motor and extending outwardly therefrom. A support includes a pair of arms with one arm extending upwardly from each side of the track and a cross-portion joining the arms and having an aperture extending therethrough for movement of the cylindrical cutting bit. A flat member having an aperture therethrough includes a track at its upper and lower end which engages the cross portion of the bracket for movement transverse to the cross portion. In operation, the cutter may be used to drill holes, dowel holes, or slots in a fast efficient manner. A polycarbonate member having a elongated slot for the cylindrical cutting bit is mounted between the flat member and a adjustable support member, which includes a perpendicular portion extending outwardly therefrom and two portions extending downwardly from the perpendicular portion therefrom.

Abstract: Drilling apparatus includes a stationary support base and a worktable mounted to the support base for movement in a Y direction. At least one tooling plate is movably mounted to the support base for movement in the Y direction and is adapted to support the panel shaped workpiece thereon. At least one tooling element is mounted for movement in X and Z directions in relation to the tooling plate for machining contact with the panel. Coordinated movement of the tooling element in the X direction with movement of the worktable in the Y direction enables a predetermined pattern of holes to be drilled into one end of the panel. Following this coordinated drilling movement, the worktable is maintained in a stationary position while the tooling plate shuttles from a first position to a second position in the Y direction to move the panel and expose the other end portion to subsequent coordinated X and Y movement of the tooling element and worktable to drill a further predetermined hole pattern into the panel.

Abstract: An apparatus for working on both sides of a flat workpiece includes a first support surface having a first axial line thereacross, a second support surface juxtaposed to and associated with the first support surface and having a second axial line thereacross which lies in a common plane with the first axial line, and a first carrying assembly operably connected to the first support surface in a manner to movably reciprocate along the first axial line and having a first extending arm which is laterally displaced from one side of the common plane and a second extending arm which is laterally displaced from another side of the common plane. A second carrying assembly is operably connected to the second support surface in a manner to movably reciprocate along the second axial line, wherein the second carrying assembly includes a workpiece removably mounted in a manner to position the workpiece in the common plane between the arms such that the arms extend about the workpiece.

Abstract: The workpiece or pack of printed circuit boards is fitted to a clamping fixture carried by the table and is machined by a machining head; the head and the table being movable with respect to each other along two coordinate X, Y axes. The aligning method includes the steps of providing the pack with two locating holes; fitting the pack to the fixture; determining the distances between the real positions of the holes and two reference positions; and moving the pack on the fixture to eliminate the distances. The aligning device has an optoelectronic sensor carried by the head to determine the real position of each hole; and a number of motors controlled on the basis of the real position of each hole to move a locating member for locating a first pin on the pack, and to move one bar of a pair of bars for clamping the other pin on the pack.

Abstract: The table fence assembly comprises a rear fence, a front, and a plurality of locking bolts and locking nuts. The rear fence has a L-shaped cross section that includes a horizontal section and a vertical section. The sections are each provided with an elongated hole. The front face also has an L-shape cross section that defines a connecting section and a supporting section. The supporting section is provided with an opening for applying a fastener thereto.

Abstract: In a machine tool provided with a column 4 mounted on a back end portion of a bed 1 having a table 2, and a spindle head 20 arranged in a vertically movable manner to the column 4, both sides of an upper portion of the column 4 is connected with both sides of a front-end portion of the bed 1 through support members 42, 43. Even the machine has a structure that the spindle head 20 embeds a main shaft rotating at high rpm, vibration can be reduced. The column is affected by a force to fall down in the direction due to the weight of the spindle head 20, but the tilt caused by the force can be avoided. Accordingly, a high finish surface accuracy can be ensured without an increase in size and weight.

Abstract: A relative positioning machine has a first panel for supporting a spindle thereon, a second panel for supporting a workpiece, first through fourth support mechanisms by which the first and second panels are tiltably supported for angular movement about an X1 axis, an X2 axis, a Y1 axis, and a Y2 axis, and first through fourth actuator mechanisms for individually tilting the first and second panels about the X1 axis, the X2 axis, the Y1 axis, and the Y2 axis. The spindle 11 and hence a machining unit such as a drill bit mounted thereon, and the workpiece can quickly and easily be positioned relatively to each other for allowing the machining tool to machine the workpiece at any of various areas at various angles on the workpiece. The relative positioning machine is relatively small in size and allows the workpiece to be machined quickly by the machining tool.

Abstract: The valve seat and guide machine comprises a base structure which supports a pantograph having a major arm and minor arm which moves slidably with respect to the major arm. A spherical head is supported by a number of sphere seats attached to the pantograph arm so that the spherical head can pivot around its centerpoint. A stepper motor provides small z-axis translation of the spindle which is contained in the spherical head and has a cutting bit and a pilot which extend from the bottom of the spherical head. A drive motor rotates a transmission linkage which is coupled to the spindle which rotates the cutting bit to cut the valve seat. Small x,y displacements are enabled by moving the entire spherical housing and its supporting sphere seats with respect to the support frame. The pantograph provides large z-axis displacement to remove the spindle from the cutting position and to provide clearance for movement to another machine site.

Abstract: A precision drill for drilling noncircular bores, comprising a drill bit on a shaft and a holder for the workpiece being drilled, for providing a drill that can operate economically at high speeds. The workpiece holder oscillates translationally in at least one direction at a frequency controlled by the speed of the drill bit, and moves along a path determined by the desired shape of the bore to be drilled.

Abstract: A precision measuring mechanism includes a precision threaded rod member and an indicating element mounted to move along a linear graduated scale upon rotation of the precision threaded rod member. A circumferential scale has a plurality of marks spaced from a circumferential zero point to indicate a preselected fractional amount of rod member rotation between adjacent circumferential marks. The linear graduated scale includes a plurality of rotation counting marks spaced from a linear zero point and laterally spaced with respect to each other along the linear scale for a linear distance that corresponds and is equal to a complete rotation of the precision threaded rod member. The precision measuring mechanism is also usable with a work operation tool machine which fixes a workpiece on a workpiece supporting table that moves along both an x-axis coordinate and a y-axis coordinate such as a milling machine, drilling machine, mill-drill machine, and the like.

Abstract: An adaptor mounting a drill stand on an I-beam comprises a base plate which is clamped to a flange of the beam by clamping arrangements. A table of the drill stand is then bolted to cross-members slidably mounted on the base plate. In another arrangement, the pillar of the drill stand 11 is fitted in a collar housing which is slidably mounted on a base plate. In yet another arrangement, the pillar of the drill stand is mounted on the flange of an I-beam by opposed jaws which are slidable along the pillar and locked in position by screws.

Abstract: A drill press assembly having a base mountable to a work bench, a vertical column attached to the base and a drill head assembly having an electric motor and a quill. The drill head assembly is movably attached to the column. A rack is rotatably attached to the top of the column and is engaged by a crank and pinion mechanism attached to the frame of the drill head assembly which permits the drill head assembly to be displaced vertically and rotated about the column. A tilt table is attachable to the base of the drill press. A locking mechanism having a bolt passing through a longitudinal slot in the supporting base of the tilt table and a transverse slot in the base is engaged by an eccentrically mounted camshaft to lock the supporting base of the tilt table to the top surface of the drill press base. A pivoting frame is pivotably attached to the supporting base and contains a table plate. A fence is attachable to the top of the pivoting frame.

Abstract: A machine tool apparatus having a work piece support table supported by an articulating arm. The machine tool apparatus includes a stand and a motor mounted to the stand. A movable cutting tool holder is provided and a transmission mechanism is drivingly coupled between the motor and the cutting tool holder on the stand. The apparatus also includes a work piece support table and a table positioning support movably coupled to the stand. Part of the table positioning support projects outwardly from the stand. The apparatus further includes an arm having first and second ends. The first end of the arm is pivotably coupled with the projecting part of the table positioning support. The second end of the arm is rotatably coupled with the work piece support table.

Abstract: An apparatus and method for aligning flexible printing plates and for accurately drilling pin register holes therein includes a three-way adjustable table top assembly which can be selectively adjusted in X and Y directions and rotated about an axis. A pneumatic clamp is positioned on the table top assembly for clamping a pre-marked flexible printing plate to be drilled in place thereon. A movable stereomicroscope viewer is slidable above the table top assembly to view the flexible plate for position adjustment via the adjustable table top assembly. A drill assembly is also positionable over each location at which a pin register hole is to be drilled. The drill assembly includes a movable hollow core drill bit surrounding a stationary rod. Once the flexible plate is aligned via the viewer, the drill assembly is sequentially positioned above the flexible plate at each point to be drilled with a pin register hole and operated to drill each hole therein.

Abstract: A finger hole drilling machine for a bowling ball is disclosed. The drilling machine includes a ball seat assembly, an air suction/expelling valve unit, a marking pen assembly and a turntable assembly. The ball seat assembly has a ball seat housing of the box type for tilting the bowling ball forward and backward, and a ball seat movably placed on the ball seat housing and adapted for tilting the bowling ball leftward and rightward. The drilling machine identically drills the finger holes on a plurality of bowling balls of a bowler, thus to achieve identity of the finger holes of the bowling balls. The drilling machine also readily sets the drilling positions on the bowling balls, thus to save time and to readily finish the finger hole drilling work and to improve the efficiency of the finger hole drilling work.

Abstract: A drive apparatus, along with an XY drive apparatus on which it is equipped, is provided which, together with allowing highly accurate driving and positioning of a driven object by absorbing deflection in the radial direction of a nut, achieves reduced size of the apparatus and simplification of its structure.

Abstract: A table translation apparatus for a wood working machine is disclosed wherein a table can be repetitively moved at a high speed within a small distance to enhance the working efficiency for wood. A pair of front and rear screw shafts are supported for rotation linearly at front and rear portions of a bed extending forwardly and backwardly and driven to rotate forwardly or reversely independently of each other by a motor. A pair of front and rear shuttles are held in threaded engagement with the front and rear screw shafts, respectively. A pair of front and rear side clutches for releasably connecting the table and the front and rear side shuttles to each other, respectively, are provided on the table mounted for forward and backward sliding movement on the bed.

Abstract: An apparatus for positioning a bowling ball during a drilling process and method that provides reproducible orientations of the ball for accurately modifying and repeating the drilling process is described. The apparatus affixed a bowling ball while exposing a sufficient portion of a surface of the ball where middle finger, ring finger and thumb holes are to be drilled. The apparatus positions the bowling ball for drilling holes of varying pitch without requiring the ball to be removed from its rigidly affixed position within the apparatus. Holes having severe pitches are easily drilled and reproduced, including oval holes having preselected oval rotations. A computer program converts inputted hand measurements to digitized apparatus movements for positioning the ball prior to drilling a desired hole. Digital encoders indicate apparatus movement that is matched with computer output for ease and repeatability in drilling a ball.

Abstract: A drive apparatus that is compact in size, low in cost, allows the attaining of a high degree of accuracy as well as high-speed driving, suppresses noise, and obtains both large thrust and braking force. The present invention is able to obtain the above-mentioned advantages of compact size, reduction of costs, high accuracy, high-speed driving and suppression of noise as a result of providing a torque generation device on a slider guided by a track rail, attaching a drive roller to which is torque is applied by an output shaft of the torque generation device, and that drive roller rolling along the track rail. In addition, the above-mentioned advantages of large thrust and braking force are obtained by forming indentations in at least one of either the track rail or drive roller with respect to the other track rail or drive roller.

Abstract: An improved machining apparatus for machining a workpiece. The machining apparatus includes a base assembly having a base support member and a table support frame non-movably attached to the base support member. A pair of cross members span the upper surface of the table. The table support frame has a longitudinal axis transverse to the cross members and includes a raceway for allowing lateral displacement of the table relative to the base assembly. At least one spindle is mounted on the cross members and can be displaced along the longitudinal axis of the cross members. Flexible retractable covers are mounted on spring-loaded rollers attached to the ends of the table support frame. The machining apparatus further includes a conveyor positioned proximate the base assembly at the lower edge of the table for removing cuttings and debris resulting from the machining of the workpiece.

Abstract: A drive apparatus and a XY drive apparatus on which it is equipped that accomplishes highly accurate driving and positioning of a driven object by absorbing deflection of a nut in the radial direction while employing a simple construction.Deflection of a nut is absorbed by deflection of flexible portions as a result of said nut being supported by an intermediate member having said flexible portions able to deflect in a radial direction perpendicular to the shaft center of a feed screw.

Abstract: The invention relates to a boring machine, particularly for woodworking, for boring rows of holes and structural bores in plate-shaped workpieces such as cabinet sidewalls, cabinet doors, etc., with a machine frame having a workpiece holder and an adjustable multi-spindle boring assembly arranged over the workpiece holder, a fixed, longitudinally oriented workpiece stop being mounted on the back of the workpiece holder, and which has a stop fixture consisting of stop rails aligned parallel to and projecting laterally at the longitudinal sides of the workpiece holder and whereat adjustable and lockable stop receivers can be introduced into the stop rails, the stop receivers receiving spring-loaded stop platelets, which project at the surface of the workpiece holding fixture, but which can be brought into a pushed back position.

Abstract: The invention relates to a boring machine, particularly for woodworking, for boring rows of holes and structural bores in plateshaped workpieces such as cabinet sidewalls, cabinet doors, etc. with a machine frame having a workpiece holder and a boring assembly displaceable on guide rails, in which machine the workpiece holder. a workpiece stop and a stop arrangement with position fingers adjustable and lockable in the displacement direction of the boring assembly, which, in connection with the boring assembly, determine the boring position along the displacement path of the boring assembly.Presetting of boring patterns with a number of bore rows is carried out by means of position rollers having a number of holding rails in which fingers can be prepositioned. The fingers cooperate with finger receivers to determine the positions of the boring assembly.

Abstract: A vertical support post mounts a drill head thereon, wherein the drill head is reciprocatable relative to the post to effect drilling of holes within paper stacks mounted upon a reciprocating table orthogonally oriented relative to the post positioned below the drill head. A reciprocating table is mounted upon a plurality of rollers, wherein the table may be positioned relative to the rollers utilizing a plurality of adjustable stop members operative in association with a stop guide mounted to a rear edge flange of the table. A clamp member is pivotally mounted over the table to secure a paper stack thereon for a drilling procedure.

Abstract: A floating fixture platen for use on machine tools having a machine support structure and a machine tool portion rotatable about an axis of rotation, the floating fixture platen including a planar member mounted on the machine support structure in a position normal to the axis of rotation of the rotating tool portion, the platen supporting a workpiece to be operated on by the rotating tool, apparatus on the support structure enabling the platen limited relative free movement in a plane substantially normal to the axis of rotation of the tool whereby rotation of the tool will produce torque in the platen and in the workpiece supported thereby, first and second oppositely facing fluid assemblies each having a piston portion engagable with a surface on the platen and positioned to oppose rotation of the platen, the fluid assemblies having pressure generated therein by the movement of the platen, and a fluid connection between the fluid assemblies to equalize the pressures therein.

Abstract: A semi-automatic track drill for use in drilling fastener holes for an aircraft body includes a pair of generally spaced, parallel rails. A plurality of slider bars extend between the rails and are connected thereto in a manner so that each bar can be slid along the length of the rails. Positioned between at least two of the bars is a drill carriage which is also slidably connected to the rails. A template having a series of alternating lands and grooves registers the carriage at preselected drilling positions. The drill assembly, including the template, is secured to the aircraft body by temporary clamping bolts which are positioned in a line along the body's surface.

Abstract: A method for placing screws in an orthopedic nail used in setting fractures of the long bones of the body. A fluoroscope assembly is used initially to develop an image on a monitor. This image enables the physician to adjust the fluoroscope assembly until the x-rays from the fluoroscope are propagated along lines which are coaxially aligned with the nail screw holes. This status of alignment is then used to allow reference marks to be made on the skin located on one or more lines projected through the limb containing the fractured bone in coaxial alignment with the nail screw holes.The limb is then incised at the location of one or more of these alignment marks allowing tubular drill guides of a jig to be set against the bone in a position of coaxial alignment with the screws holes through the nail.

Abstract: A printed circuit board is supported at its peripheral portion and is moved and positioned by a drive mechanism. During the drilling of a hole in the circuit board, the thrust of the drill acting upon the circuit board is born by a sliding contact surface on a stand disposed on the side of the board opposite the drill. Ultrasonic vibration is applied to the printed circuit board via the stand during the drilling operation to prevent the occurrence of expoxy smearing.

Abstract: A machine for drilling holes in the deck of a flat bed or other type trailer. The machine has a cross beam and rails for a wheeled carriage supporting a drill press for drilling holes in the deck in an X-direction across the deck. The cross beam and rails are carried upon wheeled trucks which are moveable longitudinally along the length of the deck in a Y-direction. The counteract thrust and to anchor the machine, adjustable clamps are provided at opposite ends of the cross beam which bear against the underside or other suitable fastening point of the trailer. The cross beam ties the machine together in providing support for the wheeled carriage, the rails, wheeled trucks and the clamps to provide a rugged and easily maneuverable machine for moving a drill press in any desired X-Y direction.

Abstract: Apparatus for feeding platelike workpieces to a tool station of a machine tool comprises a frame carrying a straight track, and a carriage, which is guided by said track and carries transverse conveying means for conveying the workpieces. In order to ensure that the workpieces will be properly supported, the transverse conveying means comprise at least one pair of endless conveyors, which are arranged one behind the other in their direction of travel and are adapted to support a workpiece. The endless conveyors of said pair or of each of said pairs are spaced apart in their direction of travel to provide an adequate space for the operation of the tools of the tool station, or at least one endless conveyor of said pair or of each of said pairs is mounted on a carrier, which is movable relative to the carriage in the direction of travel of said endless conveyors.

Abstract: A device for removing pipe attached to a fitting includes cutting apparatus for removing the pipe disposed within the fitting. A wrench apparatus is connected to the cutting apparatus for gripping the fitting to prevent its movement when the cutting apparatus is activated. Alternatively, this device may be used as a reaming device which permits radial movement of the cutting blades into engagement with a pipe after the cutting blades have been inserted within the pipe.

Abstract: A generally horizontal support table is provided including an upper surface and defining a transverse center line. A support member is supported from the table for guided rectilinear reciprocation toward and away from one side of the table in a plane normal to the upper surface of the table and the support member includes structure for supporting a rotatable chuck therefrom disposed above the upper surface of the table and in the aforementioned plane. The chuck faces toward the table and is adapted to rotatably support a drill bit. Further, a pair of abutment members overlie the upper surface of the table on opposite sides of the aforementioned plane and are supported from the table for guided movement toward and away from the plane along paths normal to the plane.

Abstract: A template holder for clamping a template to a workpiece including a pair of parallel rods mounted one above the other on a spacer block, the upper rod is connected to a template. The lower rod is pivotably connected to the spacer block and is connected to a backing block spaced from the template. The template is positioned on a workpiece and the backing block pivoted to a position beneath the template and work pieces to clamp the workpiece between the template and backing block. With the template locked in place, it is used to mark, cut, or in the drilling of the workpiece.

Abstract: A fixture for holding of work pieces on a work table of a machine tool and for precision positioning of the work pieces in rotation and in translation. The fixture is held by springs pressing it against the work table and is thus floating on the work table but is adjustable in two directions relative to the table and rotatable relative thereto.