Abstract: A method of preparing a machining process of a toothed workpiece rotatably drivable around its rotation axis, the machining process to be executed by a tool rotatably drivable around its rotation axis, wherein, for establishing a synchronized matching engagement of the tool with the workpiece toothing, a contact with the workpiece can be or is generated by performing a movement via a positioning axis, and, by means of a surveillance of a movement dedicated to an axis of motion, a contact to the workpiece is used for establishing information about a relative rotary position of the workpiece, whereby the contact is made by a portion of the tool and the dedicated axis of motion is an axis capable to move or rotate the workpiece or the tool but which is not the positioning axis.

Abstract: Provided is an electromagnetic chuck mounting structure capable of tightly and fixedly mounting an electromagnetic chuck on a table without fluctuation, having light weight, and making a low profile when an electromagnetic chuck is mounted on the table. The structure includes: a mounting groove recessed on an upper surface of the table and located inward of an edge of the table; a plurality of mounting holes formed at regular intervals on the mounting groove to fix the electromagnetic chucks to be mounted; and an adhesive filled and cured on the mounting groove and between the mounted electromagnetic chucks, wherein each of the electromagnetic chucks is fixedly fastened to each of the mounting holes by one fastening bolt, such that an upper surface of each electromagnetic chuck is aligned on a same plane with the upper surface of the table or protrudes from the upper surface of the table.

Abstract: A method is provided for positioning a component, in particular a sheet metal component, which has a first hole or a first recess. The component with the first hole or the first recess is placed on a first support which is spherical-shaped or shaped as a spherical cap.

Abstract: The invention is directed at a method of performing scanning probe microscopy on a substrate surface using a scanning probe microscopy system, the system including at least one probe head, the probe head comprising a probe tip arranged on a cantilever and a tip position detector for determining a position of the probe tip along a z-direction transverse to an image plane, the method comprising: positioning the at least one probe head relative to the substrate surface; moving the probe tip and the substrate surface relative to each other in one or more directions parallel to the image plane for scanning of the substrate surface with the probe tip; and determining the position of the probe tip with the tip position detector during said scanning for mapping nanostructures on the substrate surface; wherein said step of positioning is performed by placing the at least one probe head on a static carrier surface.

Abstract: A measuring device for measuring and inspecting various linear dimensional properties of a machined groove in a workpiece includes a fixing base, a measuring assembly, and first and second positioning members received through and protruding from the fixing base at right angles during the movement of the measuring assembly. The measuring assembly includes a measuring member, a shim, and an elastic member, the shim sleeves on an end of the measuring member, and the elastic member resists between the shim and the fixing base. The measuring assembly, together with the first positioning member and the second positioning member, enable the required depth and relative position of the machined groove to be accurately determined and inspected.

Abstract: A measuring device for measuring and inspecting various linear dimensional properties of a machined groove in a workpiece includes a fixing base, a measuring assembly, and first and second positioning members received through and protruding from the fixing base at right angles during the movement of the measuring assembly. The measuring assembly includes a measuring member, a shim, and an elastic member, the shim sleeves on an end of the measuring member, and the elastic member resists between the shim and the fixing base. The measuring assembly, together with the first positioning member and the second positioning member, enable the required depth and relative position of the machined groove to be accurately determined and inspected.

Abstract: Systems, methods, and apparatuses are provided for using a calibration fixture adapted for use with a measurement instrument having a sample probe needle. The calibration fixture can be used for calibrating a maximum depth the sample probe needle will travel to for optimal aspiration of samples within the wells of one or more of multiple different microplates. The calibration fixture can include multiple cavities to calibrate the sample probe needle height for each of multiple different microplates. Each cavity has a cavity height that corresponds with a known depth of the wells disposed within each different microplate.

Abstract: An apparatus for measuring the thickness of a measurement object, preferably a measurement object in the form of a web or piece goods, in a measuring gap, with a measuring mechanism which is fitted to a machine frame, wherein the measuring mechanism for measuring the thickness comprises one or more travel measurement sensor(s) aimed at the measurement object, is characterized in that a compensation sensor which is coupled to a travel measurement sensor measures the distance to a reference rule in order to detect and compensate for a change in the measuring gap, in that the reference rule is in the form of a side of a frame-shaped reference device integrated in the measuring mechanism, and in that the reference device is configured in such a manner that the distance between the reference rule and that side of the reference device which is opposite the reference rule is known during the thickness measurement. A corresponding method for measuring the thickness is also stated.

Abstract: A device, a method and a guiding device for setting out contours, points or works, including a computer-controlled measuring device provided with a movable measuring probe and a portable base unit provided with a rotatably supported elongate arm. The measuring probe is connected to the measuring device by means of a cord or a wire via the elongate arm, and the measuring device is provided with sensors for measuring a length or a change in the length of the cord or the wire and rotation of the arm in at least one degree of freedom for providing position data of the measuring probe.

Abstract: The present invention relates to an “S” shaped detection test piece for comprehensively detecting the precision of the numerical control milling machine and the detection method thereof. The detection test piece consists of an “S” shaped equal thickness edge strip (1) and a rectangular base (2), respectively forming two “S” shaped curves in two different planes and the projections of which in the base plane (3) cross each other and have open and close angle (?) states formed at the intersection.

Abstract: A measuring device for bone screw types of different shaft diameters is described. This measuring device has multiple receiving grooves for bone screws in a surface or an area near the surface. In the area of each receiving groove a length measuring scale, which is associated with one or more of the different bone screw types, is arranged. Also, for each of the receiving grooves a limit stop to work with a received bone screw is provided. The receiving grooves and/or the associated limit stops have a selectivity with respect to the shaft diameter of the bone screw types which can be received in the individual receiving grooves.

Abstract: A presetting device is proposed for a tool holder (1) which holds the shank (23) of a rotary tool (3) in an interference fit in a locating opening (5) and releases said shank (23) during heating, in particular by means of an induction heating arrangement (7), and which has inside the locating opening (5) an axially adjustable positioning stop surface (21) for the tool shank (23). The presetting device comprises a holder receptacle (11), which holds the tool holder (1) in an axial position and has an opposing reference surface (25), and means (43) for measuring the axial overall length of the rotary tool (3). The presetting device also comprises a measuring device (27) which measures the axial distance between the positioning stop surface (21) of the tool holder (1) and the opposing reference surface (25) of the holder receptacle (11) and has a measured-value indicator (55), the indicated distance value of which can be increased by the measured value of the overall length of the rotary tool (3).

Abstract: A system for correcting twist in airfoil components includes a first fixture assembly for holding a first end of an airfoil component and a second fixture assembly for holding a second end of the airfoil component. A rotary drive unit is provided for rotating the first fixture assembly. A gage is included for measuring twist angle in the airfoil component, and a controller controls the rotary drive unit in response to input from the gage to twist the airfoil component. In operation, the airfoil component's twist angle measured by the gage is fed to the controller. The controller computes how much the airfoil component needs to be twisted to achieve a desired twist angle, and the first fixture assembly is then rotated sufficiently to twist the airfoil component to the desired twist angle.

Abstract: An inspection device for inspecting production of threaded members wherein the threaded members are inspected to ensure that when the threaded member is matched with a corresponding threaded hole in an automotive drive system, the threaded member will mate properly to serve its intended purpose. The apparatus of the invention is formed as a three-piece gage assembly that checks for lead errors and length errors set forth in the threaded member. The combination gage includes a substantially cylindrical gage spacer, a threaded ring gage, and a flush gage pin, which is associated with the threaded ring gage, having a low end mark and a high end mark thereon. The markings indicate proper/improper axial length of the threaded portion. The preferred embodiment is used to evaluate a drive pinion shaft of an automotive axle assembly.

Abstract: An inspection device for inspecting production of splined members wherein the splined members are inspected to ensure that when the splined member is matched with a corresponding splined hole in an automotive drive system, the splined member will mate properly to serve its intended purpose. The apparatus of the invention is formed as a three-piece gage assembly that checks for lead errors and length errors set forth in the splined member. The combination gage includes a substantially cylindrical gage spacer, a splined ring gage, and a flush gage pin, which is associated with the splined ring gage, having a low end mark and a high end mark thereon. The markings indicate proper/improper axial length of the splined portion. The preferred embodiment is used to evaluate a drive pinion shaft of an automotive axle assembly.

Abstract: A J-back calibration device is adapted to vary respective positions of the seat and the back on a chair to which it is removedly attached. A chair measurement device is mounted to the seat of the chair and is adapted to take measurements of the chair given a set position of the J-back calibration device. A design of experiments software is provided with test condition information including the variable positions of the J-back calibration device and measurements from the chair measurement device. The software generates a table of configuration settings for the J-back calibration device at which shirt-pull and bridging or other such variable sought to be optimized can be measured and provided to the software. Through graphical and other analytical tools, optimal configuration settings for the variable positions of the J-back calibration device are determined. The J-back of a chair is adapted to these calibrated settings.

Abstract: A J-back calibration device is adapted to vary respective positions of the seat and the back on a chair to which it is removedly attached. A chair measurement device is mounted to the seat of the chair and is adapted to take measurements of the chair given a set position of the J-back calibration device. A design of experiments software is provided with test condition information including the variable positions of the J-back calibration device and measurements from the chair measurement device. The software generates a table of configuration settings for the J-back calibration device at which shirt-pull and bridging or other such variable sought to be optimized can be measured and provided to the software. Through graphical and other analytical tools, optimal configuration settings for the variable positions of the J-back calibration device are determined. The J-back of a chair is adapted to these calibrated settings.

Abstract: A solid core fixture for measuring a workpiece and a method for making the same. The solid core fixture includes a solid core made of a homogeneous material, a skin layer covering the solid core, and a surface material covering a portion of the skin layer. The surface material is machined for measuring the workpiece. The skin layer preferably includes an inner skin covering the solid core, a skin core attached to the inner skin and an outer skin attached to the outer surface of the skin core, the three layers being molded in a single process and cured together. A method of making the solid core fixture includes the steps of fabricating a plug core from a homogeneous material; attaching the plug core to a base; applying a skin layer to the plug core and the base; curing the skin layer; covering a portion of the skin layer, after curing, with a surface material; and machining the surface material for measuring the workpiece.

Abstract: The invention relates to a device for displacement of blocks, with a view to comparison of their dimensions by means of a measuring apparatus, which device includes a support, referred to as the measuring table, which defines a supporting and sliding plane for the blocks, a piece, referred to as the template, situated above the measuring table and bearing stops disposed in order to maintain the blocks in a predetermined position and orientation relative to the measuring apparatus, by cooperating with the lateral faces of the blocks, while preserving their free support on the measuring table, and is carried by a guide device along at least one axis parallel to the pressing plane, this device being characterized in that the template is made up of two separate parts which can be displaced separately from one another.

Abstract: The present invention provides a double row taper-roller bearing and a method of assembling a double row taper-roller bearing, which are, when in an assembly, capable of assembling and being assembled by controlling a negative axial gap after the assembly. The present invention-provides also a wheel support structure and a method of the assembling the same structure.

Abstract: A grading template for measuring food product attributes for quality control and compliance. The template supports scales for measuring product attributes and has application for measuring size, shape, color and cell structure for baked bread.

Abstract: A method and apparatus for high speed acquisition of the dimensional parameters of a work piece are effected by simultaneously acquiring probe positional information, converting the probe positional information to standard characteristic data, and calculating multiple dimensional geometries using the converted probe position information. Selected characteristic data may be stored for use with multiple dimensional geometry calculations, reducing the calculation time. A computer and associated software are used to convert the positional information to dimensional geometry information.

Abstract: An inspection device for examining a piece of aperture graphite of an extraction electrode, and the aperture graphite includes a to-be-examined curve and a to-be-examined engagement portion. The inspection device includes a sidewall surface having a standard curve marked thereon, and an examination engagement portion having a predetermined positional relationship with the sidewall surface. After the to-be-examined engagement portion is engaged with the examination engagement portion, and after the to-be-examined curve is projected onto the sidewall surface, the suitability of the aperture graphite can be determined according to the amount of differences between the projected to-be-examined curve and the standard curve.

Abstract: A system and method for assembling a fuel tank is disclosed. A measuring device is mounted on a carriage on which at least one machine tool (e.g., saw, router) is also mounted. This carriage is operatively interconnected with a computer and may be longitudinally moved between a headstock and tailstock which are longitudinally displaced and on which various subassemblies of the fuel tank may be mounted during the assembly of a given fuel tank. Length measurements are preferably made of each fuel tank subassembly prior to any machining operation being executed thereon, as well as after each such machining operation, by monitoring/knowing the longitudinal position of the carriage via the measuring device. These length measurements may be automatically recorded on an appropriate computer-readable storage medium in relation to the subject fuel tank subassembly and the subject fuel tank.

Abstract: A method of measuring a roll diameter of a roll is provided. At first, a step-shaped conical master roll consisting of a plurality of diametrical parts is prepared and then, the diameters of the diametrical parts under predetermined standard temperature are measured. After mounting the master roll on a roll grinder under a temperature condition similar to that surrounding the roll mounted on the roll grinder, a diameter of one diametrical part, of which standard diameter is closest to the roll diameter of the roll, is measured. Next, a difference between the diameter value of the diametrical part and the standard diameter value is calculated as a correction value, so that the roll diameter value of the roll is corrected by the correction value.

Abstract: A method and apparatus for measuring the characteristic dimensions of a vehicle seat for use in an automotive vehicle including the seat H-point location and determining variable data deviations of the dimensions and the H-point location from standard specifications wherein a seat to be tested is placed in a seat buck including a focused light beam generator capable of directing a light beam toward the vehicle seat after it is mounted on the seat buck, the seat buck further including a fixed target member for prepositioning the location of the light beam for zeroing the digital position coordinate read-outs prior to installation of the seat being tested on the seat buck.

Abstract: An axial flow, turbofan gas turbine engine, generally, has a fan section, a compressor section, a combustor section, and a turbine section. An axially extending flow path for working medium gases extends through these sections. The compressor section includes an upstream low pressure compressor and a downstream high pressure compressor. The high pressure compressor is formed by a stator assembly and a rotor assembly. The rotor assembly has a plurality of airfoils or blades which extend radially outward from a rotor disk. During operation, the fan section draws in the working medium gases, as well as, sand. The sand abrades the blades and causes the blades to erode. In an effort to determine the service life remaining in a blade after erosion damage has been done, the present invention relates to a method and a gauge for measuring the service life remaining in a blade.

Abstract: A method for the dimensional measurement of a piece to be checked is disclosed, wherein a comparison sample and a reference sample are employed, respectively of a material which is coherent with that of the piece to be checked and of a material having a low thermal expansion coefficient. Through the comparison between the two samples the relative thermal expansion is determined, and same is then related to the measurements carried out on the piece to be checked so as to determine the dimensions thereof as if the measurement were performed in a controlled temperature environment. The reference sample for carrying out the method is preferably made of a composite material.

Abstract: A chair measurement device includes a base configured to stably engage a chair seat in a manner simulating a person sitting on the chair, and further includes an upright member pivotally mounted on the base for simulating the person leaning against the chair back. The upright member includes an upper section having an arcuately shaped rear surface, and an elastic member is extended between the upper section and the base for engaging the chair back to facilitate positioning the device on a chair. The upright member is lockable on the base to facilitate initial positioning of the measurement device on the chair, but is releasable and movable against the chair back to facilitate taking measurements. The base and the upright member include planar surfaces for supporting measurement taking tools, and further include slots for locating the tools in square and predetermined positions on the measurement device.

Abstract: A frame has sensors mounted thereon for engaging selected portions of a sand core and generating signals proportional to sensed dimensions of the sand core. A control unit compares the sensor signals with a zero reference dimension and a dimensional tolerance range for each sensed dimension of the sand core and generates an indication of acceptable/unacceptable core dimensions. A computer monitor and/or light panel is activated by the control unit and provides a visual indication for each sensed dimension by means of numeric data, color, directional arrows or distinct illuminated lights of an acceptable/unacceptable and even a marginally acceptable sand core.

Abstract: An apparatus for aligning bicycle wheel truing stands is disclosed having a gauge bar (10), hub pin (20), and gauge pin (30), which combine together to represent those certain parts, or features, or physical manifestations, or characteristics of a perfectly true, perfectly dished bicycle wheel, and being, by virtue of its construction and manufacture, accurate for use in aligning bicycle wheel truing stands.

Abstract: Accurate measurements of production parts are obtained from a system which includes a first measuring apparatus in a laboratory, and a second measuring apparatus which is in a non-laboratory environment where it is subjected to greater temperature fluctuations than in the laboratory. A reference part of substantially the same size and shape as the production parts is inspected by both measuring apparatuses, and the production part is inspected by the second measuring apparatus. While being inspected, both parts occupy substantially the same location on the second measuring apparatus. Results of these inspections are processed by a computer to provide (1) target values which the shop machine would perceive when inspecting a perfect part as specified by the part drawings, or (2) values which indicate what the laboratory machine would perceive for the production part.

Abstract: A fixture type gauge (20) includes a base (22) and a plurality of segment blocks (1-12) mounted on the base (22) configured and arranged to allow comparison of manufactured parts (46) with a reference standard. Under computer control, reference marks (36, 54, 56, etc.) and data (26) are laser etched on the gauge base and segment blocks to facilitate rapid, accurate assembly of the gauge parts and provide a permanent record on the gauge of part related information. Laser machined alignment holes (30, 32) in the gauge base establish a reference axis on the base which can then be used to physically align the gauge with an independent spatial coordinate system, such as that of a coordinate measuring machine.

Abstract: An apparatus for measuring crimp height between crimped opposite sides of a terminal which has been crimped to an element is provided. The apparatus is particularly useful for measuring the crimp height of a terminal when one or more of the crimped opposite sides has a surface profile that is non-planar, or when a soft insulation sleeve is present on the terminal in the crimp area. The apparatus includes a pair of opposed probe members which are relatively movable between open and closed positions. In the open position the probe members are spaced apart- In the closed position the probe members are biased against the crimped opposite sides by springs. The probe members are specially configured to match the surface profiles of the crimped opposite sides.

Abstract: A gage master artifact and method for verifying calibration of machine tools and other positioning apparatus such as a coordinate measuring machine wherein measurements are taken of bore sizes and lengths of the artifact in different orientations within the coordinate field of the apparatus by a probe of that apparatus and comparing such measurements with known measurements of the artifact to verify calibration accuracy of the apparatus.

Abstract: The invention relates to a gauge or set of gauges for determining whether the bend angle, bend diameter, and end extension dimensions of a bent steel reinforcing bar used in structural concrete construction are within established allowable limits. The gauge comprises at least the outer marginal portion of a section of a circular disc, the disc having an outer perimeter which defines a diameter approximating the minimum bend diameter for a particular bar size and bar bend, the perimeter taking into account the deformations on said bar and indicating the starting and ending points of the bend, i.e., the points of tangency. Also included are methods of using such a gauge to determine whether a bar bend has less than the minimum bend angle and diameter and whether the end extension of such bend is less than the minimum allowable length.

Abstract: A core 4 is mounted on a machine tool for indexable rotation about an axis 2A, so as to bring respective cassettes 10 into position where they can be operated on by tools held in the machine tool spindle 6. The cassettes 10 may hold workpieces 14,14A for machining. After machining, the workpiece 14A is measured by a probe 20 held in the machine tool spindle 6. A pre-calibrated artifact 26 held on another cassette 10 is then indexed into the same position as previously occupied by the workpiece 14A, and comparative measurements are made of the artifact. The accuracy of these comparative measurements is increased because the artifact 26 resides on the machine tool in the same thermal environment as the workpiece during the machining, and because the measurements are made in the same position within the working volume of the machine tool, so that the same regions of the machine tool's measurement scales are utilized.

Abstract: A fixture type gauge (20) includes a base (22) and a plurality of segment blocks (1-12) mounted on the base (22) configured and arranged to allow comparison of manufactured parts (46) with a reference standard. Under computer control, reference marks (36, 54, 56, etc.) and data (26) are laser etched on the gauge base and segment blocks to facilitate rapid, accurate assembly of the gauge parts and provide a permanent record on the gauge of part related information. Laser machined alignment holes (30, 32) in the gauge base establish a reference axis on the base which can then be used to physically align the gauge with an independent spatial coordinate system, such as that of a coordinate measuring machine.

Abstract: A gauge which is constructed to measure a thread of varying pitch, and which includes a threaded gauge element adapted to be screwed into engagement with the thread of varying pitch and to a point at which the threads have a light binding relationship resisting further advancement of the threads together, in combination with a dial indicator adapted to indicate the position at which the binding of the threads occurs as a measurement of the thread of varying pitch. The device may include a second element which is shiftable axially relative to the threaded gauge element to a position limited by engagement with the part containing the thread of varying pitch, with the dial indicator being responsive to and adapted to indicate the relative positioning of the two elements.

Abstract: A "U" shaped clip member is arranged for resilient mounting to contiguous construction studs, wherein the clip member includes spaced parallel plate legs biased towards one another fixedly and orthogonally mounted to a base plate. The base plate includes a "U" shaped channel extending exteriorly of and projecting orthogonally relative to the base plate to define a channel spacing between the channel projection and the base plate to receive a hammer head projection to permit efficient removal of the clip member subsequent to its use in the securement and alignment of construction studs relative to one another.

Abstract: A device for recognizing different type parts, each type having a predetermined dimension, comprises an abutment against which one side of the part is positioned, a mobile feeler including a mobile abutment adapted to be brought into contact with the other side of the part and a sensor comprising at least one masking member fastened to the feeler and at least one fixed sensor. The device is adapted to be fitted to a machine for processing window or French-window frames to determine the type of frame to be processed.

Abstract: A reference master part for linear dimensions and/or geometrical and/or shape features of determined workpieces (30) comprises precision-machined surfaces having mutual spatial arrangements such as to provide known references for said dimensions, etc. For simplifying the manufacturing processes and reducing the costs, the master part is made of a support body (1; 31) of ordinary material, reference elements (7, 8; 41-46, 50, 51, 54-57, 63, 64, 70, 71), of special material for master parts, fixed in corresponding seats (4; 33-38, 58-60) of the support body, and supporting and guiding elements (63, 64, 70, 71), made of special material, fixed to the support body. During the master part manufacturing, the reference elements are adjusted and then fixed in the relevant seats.

Abstract: A device and method for checking the roundness of ball-point type contacts associated with a measuring device and used to engage a threaded surface of a specific thread type to facilitate measurement of critical dimensional parameters of a threaded member. The device consists of a hard, wear resistant, and dimensionally stable material having formed thereon a reference groove and a comparison groove adjacent flat surfaces. The reference groove conforms in profile to the profile of the thread type while the comparison groove is square-shouldered and wider than deep. The depths of the reference and comparison grooves are selected such that a perfectly round ball-point type contact is insertable into each to the exact same depth relative the respective adjacent surfaces. The method requires attachment of the contact to a dial gage capable of measuring the distance to which the contact extends below a reference plane.

Abstract: A succession of nominally identical workpieces is measured using a probe on a coordinate measuring machine. To enable most of the workpieces to be probed at a fast speed (step 40), and compensate for the errors thereby introduced, one workpiece is also probed at a slow speed (step 32). For that workpiece, a series of error values is calculated (step 36) from the differences between the fast and slow measurements. The subsequent fast measurements on succeeding workpieces are corrected by making use of these error values (step 42).

Abstract: An apparatus for gaging the contour of a machined part includes a rotary slide assembly, a kinematic mount to move the apparatus into and out of position for measuring the part while the part is still on the machining apparatus, a linear probe assembly with a suspension arm and a probe assembly including as probe tip for providing a measure of linear displacement of the tip on the surface of the part, a means for changing relative positions between the part and the probe tip, and a means for recording data points representing linear positions of the probe tip at prescribed rotation intervals in the position changes between the part and the probe tip.

Abstract: A true position gauge for checking the alignment of a plurality of electrical contacts positioned in an electrical connector, said contacts extending from the connector body and presenting a patterned array, said gauge comprising: a gauge work station; connector receiving means at said work station; connector alignment means at said work station for cooperating with said connector to present a consistent alignment to said gauge; a gauge plate at said work station, said gauge plate containing a plurality of apertures equal in number and pattern to said patterned contact array; gauge plate moving means operable to deposit said gauge plate upon said connector; and sensing means operable in conjunction with said deposit of said gauge to determine if said contacts have penetrated said apertures.

Abstract: The invention relates to apparatus for the diagnosis of the dimensioins of a motor vehicle body positioned on an alignment bench comprising a frame constructed of sections on which are arranged terminal alignment-angle sets. These sets are comprised of mechanical parts including end or head pieces which are disposed on columns longitudinally displaceable and fixable in guide supports fastened appropriately on the frame to function as multi-Z-receptors. The configuration of the end or head pieces are fabricated such that upon positioning on the column they will have already in them the desired or predetermined XYZ-values or dimensional coordinates of the points of the motor vehicle to be checked when in either a complete or partially disassembled state.

Abstract: A gauge and gauging method for measuring a thread of varying pitch by screwing a threaded gauge element into engagement with the thread of varying pitch and to a point at which the threads have a light binding relationship resisting further advancement of the threads together. The device is constructed to then indicate the extent to which the gauge element has advanced when the binding condition is attained, and utilize that reading as a measurement of the functional accuracy of the thread of varying pitch. The device preferably includes a second element which, when the threads are in their lightly binding condition, is adjustable axially relative to the threaded gauge element and to a position of contact with the part containing the thread of varying pitch. Markings indicating the relative positioning of the two elements then provide a precise measurement of the functional accuracy of the thread of varying pitch.

Abstract: A tube checking system is made up of a template placed on a flat metallic surface, and a series of adjustable holding fixtures places at selected positions along the template. The template has a computer aided layout of a plan view of a formed tube inscribed on a film with selected check points along the layout showing the height and angle of the tubing above the check point. Each holding fixture is adjustable as to height and angle, is indexed to align to the check point, and has a switchable on off magnet in the base to secure the fixture in position.

Abstract: A thread guage for indirectly determining the pitch diameter and taper of threads on casing and tubing is disclosed. In the preferred and illustrated embodiment, the thread guage includes a pair of adjustable thread engaging arm assemblies mounted on a bar member. The arm assemblies are selectively locked along the bar member, the distance between the arm assemblies being a fixed position corresponding to a specified thread size. At least two indicators are mounted on one of the arm assemblies providing a value of the measured thread dimensions relative to a standard, which value is used to determine pitch diameter and taper of the thread.