Abstract: A workpiece gaging system includes carriage structure for a gaging part, movable longitudinally and laterally, and a rotor to rotate that structure; also indicator means is operatively connected with the part to indicate the status of engagement, displacement, or need for displacement, of the gaging part relative to a surface or surfaces (such as pipe threads) to be gaged, as at multiple locations. Measurement encoding and signal processing means are also provided.

Abstract: A thread gauge which attaches to a vernier caliper to measure the thread pitch diameter of both externally threaded and internally threaded parts. A pair of anvils are externally threaded with threads having the same pitch as those of the threaded part. Each anvil is mounted on a stem having a ball on which the anvil can rotate to properly mate with the parts to which the anvils are applied. The stems are detachably secured to the caliper blades by attachment collars having keyhole openings for receiving the stems and caliper blades. A set screw is used to secure each collar on its caliper blade.

Abstract: A thread gauge which attaches to an inside micrometer to measure the thread pitch diameter of internally threaded parts. A pair of anvils have external threads which match in pitch with the threads of the part. Each anvil has a bore which receives a ball and a slot which receives a stem projecting from the ball. Mounting sleeves connect the stems with the opposite ends of the micrometer. Each anvil can rotate on its ball about the stem axis so that the micrometer can be adjusted to position the anvils against the threaded part. The anvils can also move linearly on the balls to properly align with the threads of the part.

Abstract: A method and apparatus for checking toothed articles such as splines. A spline is rotatably supported in a cradle, and a pair of discs, one of which is axially moveable, the other of which is axially fixed, are brought into engagement with generally parallel and oppositely directed teeth of the spline. The discs are of the same hand and are rotated in unison causing rotation of the spline in the cradle. Relative movement of the discs is monitored to provide a succession of span measurements in order to provide information which can be used to sort splines according to their deviation from designed dimensions.

Abstract: A pipe thread gauge for measuring the pitch diameter of threaded pipe and determining the taper on the inner and outer sides of the threaded ends of the pipe comprising: an elongated rail, a fixed blade block assembly mounted on the rail, a second blade block assembly slidably mounted on the rail and movable relative to the fixed blade block assembly, thread-engaging blades mounted on both the fixed and sliding blade block assemblies, set screws mounted in the second blade block assembly for engaging apertures provided in the rail at selected locations therealong for locking the slidable blade box assembly at such locations, and a digital read-out to visually display measurements of pitch diameter and/or taper.

Abstract: The device comprises a body having a longitudinal central bore for passing a probe therethrough intended to penetrate into the hole to be tested. The probe is fixed to the body by a matching socket having a locking screw. A ring is slidably mounted on the body, and secured against rotation by a screw engaged in a longitudinal groove of the body. A spring pushes the ring back with respect to the body, the movement being limited by a stop. The front part of the ring receives an insert stop coming to bear against the outer face of the workpiece to be tested. At the end of penetration of the probe into the hole, the rear part of the ring comes opposite an annular mark formed in the body.

Abstract: A gage and method are disclosed for measuring the inside or outside diameter of a product at a selected distance from the end of the product. The gage has a pair of blocks slidable along a pair of parallel vertical guide rails. Each block has a bearing pad which can be positioned against the end of the product to be measured. An arm extends horizontally from each block and is slidably mounted in an aperture extending through the block. A contact depends vertically from the end of each arm. One contact is mounted on a vertically reciprocable dial indicator plunger. The contacts are first positioned horizontally and vertically using gage blocks which correspond to the specified diameter and distance from the end of the pipe. The gage is then positioned against the end of the product and the contacts are brought into contact with the surface of the product at diametrically opposed points thereon. The dial indicator displays the deviation of the actual diameter from the specified diameter.

Abstract: A thread measuring tool consists of a "no go" gauge (3) and a "go" gauge (4) disposed on a through-going spindle in a housing (1) with an end cap (7) and a plug gauge holder (5) capable of being displaced telescopically inside said housing (1).The plug gauge holder (5) is also provided with a scale (6).When the plug gauge (4) is screwed into a threaded hole (9), the holder (5) is displaced telescopically inside the housing against a spring contained in said housing.One can thus check the quality of a thread in a threaded hole (9) and at the same time measure the depth of the thread on the scale (6), which is read off against the edge of the housing.

Abstract: A gauge device has an insert portion having means for aligning the insert portion along a longitudinal axis of an oil drill pipe so that the squareness of a joint shoulder and shoulder available for grinding at a box end of an oil drill pipe can be determined. The insert portion has indicia formed thereon calibrated to read the shoulder available at the box end of said drill pipe. An indicator portion of the gauge device is slideable along the insert portion and has a radially directed annular flange extending perpendicular thereto and perpendicular to a longitudinal axis of the oil drill pipe upon insertion of the insert portion within the box end of said oil drill pipe. The squareness of the outer shoulder of the oil drill pipe can be directly visualized by reference to the annular flange of the indicator portion. Field grinding can then be performed on the box end of the oil drill pipe until a square shoulder is obtained.

Abstract: A tool is provided which incorporates a ring gauge into which the external tapered threads of a pipe are screwed by hand until tight, at which time a mechanical impulse of predetermined, consistent amplitude and duration is applied to the pipe-gauge combination from a hammer portion of the tool propelled, by rapidly-released spring energy against an anvil portion of the tool, the impulse being immediately coupled to the joint between the pipe threads being checked and the ring gauge, for overcoming any dirt or nicks in the thread which are restricting the engagement of the thread by the ring gauge.

Abstract: A holder for use in a three-wire measurement of thread pitch diameter comprises a pair of holder elements for holding respective ones of the three wires. The holder elements are generally rectangular in shape and are relatively movable toward and away from each other in a straight line in the direction of the diameter across which the measurement is being taken. The holder elements support measuring wires in parallel planes diametrically on opposite sides of the thread. Each holder element is provided with a central aperture providing access to the wires at their points of contact with the thread so that a micrometer measurement across the three wires is obtained. The pitch diameter is calculated from the micrometer measurement and the diameter of the wires.

Abstract: A ring gauge is made from the box end of an authenticated precision threaded member and a plug gauge is made from the pin end thereof. The pin end is machined laterally and radially at its nose to ensure complete engagement of the threads. The box end is machined laterally and radially at its internal shoulder for a similar reason. A plunger-activated seal-diameter gauge operates through a radial hole in each of the ring gauge and plug gauge thus made, so that the plungers contact the sealing surface of a measured pin end or box end. Similarly, a plunger-activated standoff gauge operates through a longitudinal opening of the ring gauge and of the plug gauge, the plungers effectively providing a measurement of standoff between the tip of the pin end being measured and the internal surface of the ring gauge shoulder or comparable standoff of the box end.

Abstract: The object to be measured (2) is placed on carrier (1). Measuring pins (7,8) can be adjusted roughly in terms of height after loosening screws (11). Sliding carriages (5,6) are guided movably by spherical guides in measurement support members (3,4) perpendicularly to the direction of measurement. Measuring pins (7,8) located in support members (3,4) which are provided with handles (13) and which are connected with sliding carriages (5,6) by means of leaf springs (14). If the laterally adjustable support member (4) is moved into the measuring position, the sliding carriages (5,6) with their measuring pins (7,8) can, within the limits of leaf springs (14), be freely centered in the pitch of the thread to be measured (2a) thus providing the ideal prerequisites for correct measurement of the thread diameter.

Abstract: An instrument for gaging a first shoulder on a workpiece having an axis includes a support and holder means to releasably connect the support to the workpiece; the support includes datum structure to engage a second shoulder on the workpiece to establish an axial reference. A gaging part is provided to move into and out of engagement with the first shoulder on the workpiece; and a carriage for the gaging part includes a first section movable axially and a second section movable radially. The gaging part is mounted on one of the two sections that is carried by and movable independently of the other section. Means is operatively connected to at least one of the two sections to produce output indicative of the extent of movement of the gaging part.

Abstract: The diameter of a thread is measured by screwing two gauge elements into simultaneous engagement with the thread to be measured, then turning the two gauge elements relative to one another to a setting in which their similar threads bear in opposite axial directions against the thread to be measured and confine that thread in a manner holding it against axial movement relative to the gauge elements, after which the diameter of the measured thread is determined by noting the relative rotary position of the two gauge elements, as indicated by relative positions of coacting markings on those parts.

Abstract: Disclosed is a thread lead gauge which includes a tubular barrel, a handle connected to the barrel, and a dial indicator connected to the handle and having a stem extending into the barrel. A single fixed bearing pin extends from the barrel and a single axially movable point is positioned spaced apart from and in line with the fixed point. A spring is provided for biasing the movable point away from the fixed point. The dial indicator indicates the position of the movable point with respect to the fixed point.

Abstract: A bore concentricity gage having a collet at one end adapted to be expanded into close fitting engagement with one of two axially spaced bores on a workpiece and a hollow concentricity plug at its opposite end adapted to be received in close fitting engagement with the other bore. The plug has an accurately concentric bore therein adapted to be engaged by a rotatable "go" bushing journalled on a mandrel having an expander for the collet thereon.

Abstract: A thread gauge for determining the proper length, taper, and diameter of a threaded member located on the marginal box and pin end portions of joints of casing or tubing. The threaded member of a joint usually has a thread length which can be defined by the distance the threads extend respective to a vanish point located near the end of the joint. The pin gauge of this disclosure is a conical body which has a smooth internal surface formed between a large and small diameter shoulder. The smooth surface defines a frustum of a cone. The box gauge is a second component of this invention, and has an external tapered surface formed between spaced shoulders which defines a frustum of another cone. Visual observable measuring means on the gauges determine that each of the opposed threaded surface of the joint is of proper length and nominal diameter, and is properly positioned respective to the vanish point of the threads.

Abstract: An instrument for gaging external threads having a frame holding an anvil for supporting axially spaced points on a threaded member and a gaging element for gaging an opposed surface of the threaded member at a point substantially midway between the supported points. The single gaging element floats both radially and axially of the threaded member and the movements are indicated by separate dial indicators.

Abstract: A machine is disclosed for testing of the oppositely located position of mechanical thread and a contact shoulder associated therewith on a pipe. A first measuring support is movably supported on a guide block in a first direction of movement and a second measuring support is resiliently supported on the first support in a linearly second direction of movement. First and second measuring heads are provided for movement in the first and second directions for measuring the threads and shoulder positions.

Abstract: The device for measuring the engagement lead of the thread of a screw-like work piece, such as a hob, for example, includes a spindle for rotating the work piece about an axis, a measuring slider movable transversely to the axis and terminated with a feeler which is in sliding contact with a flank of the thread of the work piece whereby the path of movement of the measuring slider is angularly adjustable, a sliding carriage supporting either the measuring slider or the work piece to impart a relative axial displacement therebetween, a tachometer generator coupled to the axially movable sliding carriage to generate a signal proportional to the speed of the axial displacement, a sinusoidal potentiometer mechanically coupled to the measuring slider and to an angle measuring and adjusting device to adjust the angular position corresponding to the base lead angle of the thread of the work piece, the output of the tachometer generator being connected via the sine potentiometer to the electromotor for dirving the me

Abstract: The present method and apparatus are believed to be the first to achieve, at least in a practical manner susceptible of widespread use on large numbers of joints, both proper engagement and proper makeup torque between tapered threaded members such as sections of pipe in an oil well or pipeline. In accordance with one embodiment, presently preferred, gage means are employed to determine the actual hand tight plane of each tapered threaded member, and a mark is made on each such member in predetermined relationship to the hand tight plane. Such marks are then employed for field inspection of joints which have been made up to a predetermined, measured, desired makeup torque. In accordance with another embodiment, the members (for example, casing and tubing sections and collars) are made up until the marks on the collar and the pipe are at a predetermined axial distance from each other at a predetermined makeup torque or predetermined desired range of makeup torques.

Abstract: A method and means for gauging of threads, by use of a gauge roller, for the purpose of detecting possible defects in the thread profile. The gauge roller, having different areas which have the correct profile of parts of the thread groove and depressions between said areas, is mounted on at least one lever for permitting approximately radial movement of the gauge roller. A reference for indicating and/or measuring said movement is established by mounting a reference element in the vicinity of the gauge roller, and movements of the gauge roller caused by defects in the thread are indicated and/or measured relatively to the reference. The reference may be established by use of a roller having the correct profile of the thread, whereby the relative radial and/or axial movement between the gauge roller and the reference roller is indicated and/or measured.

Abstract: A thread compliance gauge for determining the accuracy with which threads have been formed on a shaft.

Abstract: An attachment is slidably engaged with the blade of a caliper-type measuring device. The attachment carries a contact element which is sized to be inserted into the groove between adjacent threads and abut each thread. The pitch diameter of threads are measured by opposed attachments carried by the respective blades of the calipers. Axial alignment of the contact member within the thread groove is accommodated by sliding arrangement between the attachment and the blade.

Abstract: A gauge for determining the pitch diameter of threads on pipe and tubing, for determining the taper of a thread on the pin or box end of tubular structures used in oil and gas exploration an production, and for determining the existence of an out-of-round condition at the location of the threads on such tubular structures. The gauge includes an elongated scale rail, a pair of blade blocks slidably mounted on the scale rail, and a pair of thread engaging blades pivotally supported on the blade blocks. Locking and adjusting elements are provided in association with the blade blocks for locking the blade blocks in a fixed spatial relationship to each other along the length of the scale rail, with the distance therebetween precisely adjusted to a predetermined value.

Abstract: A thread gaging tool having a clamp member for rigidly clamping to a pipe end includes an axially sliding assembly coupled to a linear computer input transducer and supporting a pivoted arm provided with a gage pin which is inserted into the pipe thread to precisely measure the distance of each thread wall from the pipe end.

Abstract: Apparatus for determining the gauge and price of fasteners such as bolts and screws. The apparatus includes an array of channels from which the gauge is determined, and further includes a plurality of pages that cooperate with the channels to determine the price of a fastener.

Abstract: A wheel lug nut tool apparatus and method, the tool including a plurality of wheel lug studs and/or lug sockets mounted to a base. An indicia is affixed adjacent each stud and/or lug socket to indicate the size and thread characteristics of the same. The base is fabricated so as to be easily hand held and may be configurated with a geometric design to provide a convenient handle and hanging device for the tool. The geometric design also provides a pleasing aesthetic appearance to complement an advertising logo or the like affixed to the tool. The tool retains the lug studs and/or lug sockets in a readily-accessible and identifiable configuration to enable the user to more easily determine the unknown size and thread characteristics of a lug nut and/or lug bolt. Advantageously, each lug stud and/or lug socket may be configurated to be replaceable relative to the base by having a standardized basal portion which matingly engages and is secured to a corresponding aperture in the base.

Abstract: An improved internal thread gage comprising an elongated body and having an lineal distance gage mounted at one end thereof. A first arm having a first thread engaging member at one end is longitudinally adjustably secured to the elongated body so that the first end extends laterally outwardly from the body. A piston is longitudinally slidably positioned in a longitudinal bore in the body and is operatively coupled to the gage at one end. A second arm having a second thread engaging member at one end is laterally adjustably secured at its other end to the other end of the piston whereby both the lateral and longitudinal distances between the thread engaging members can be accurately preset.

Abstract: A metric gauge including a planar body having formed therein a plurality of varying sized sockets suitable for measuring wrench size, screw size, and nut size. A scale with offset index shoulder is also provided to measure bolt and screw length.Each of the sockets is hexagonally or otherwise formed at the planar body to receive a bolt head or nut therein to precisely measure wrench size. A seat or shoulder for the bolt head or nut is formed below the planar surface at each socket to rest the bolt head or the nut thereon when sizing.Each of the sockets is downwardly formed to a hollow cylindrical configuration of a varying diameters for bolt diameter measuring purposes. Each socket terminates downwardly in a cylindrical bottom of known outside diameter to receive thereon a nut for gauging the nut diameter. The scale edge of the planar surface is impressed with a plurality of graduations which may be in millimeters or inches which extend from the index shoulder.

Abstract: The gage includes a cam follower formed of a plurality of radially expande segments each provided with a pair of inclined surfaces riding on a pair of cams carried by an elongate shaft reciprocably mounted in a suitable housing. When reciprocated in one direction one of the cams radially expands the segments. Upon reverse reciprocation, the other cam contracts them. Threads formed on the segments are formed ot mesh with the threads to be measured. A primary function of the gage is to measure the concentric relationship between a cylindrical object and the cylindrical configuration of a threaded end portion of the object. For this purpose, the shaft is floatably supported and, as the threaded segments move into their meshed engagement, it floatably assumes the axis of the threads being measured. When fully meshed, non-contact transducers can measure any inclination of the shaft from an original disposition.

Abstract: A tool joint caliper and identifier particularly adapted for use in making up a drill string employed in an oil well drilling operation. The caliper and identifier includes a pair of pivotally connected caliper arms having contact points at an end thereof remote from the pivotal connection for engagement with a pin tool joint or a box tool joint. The other end of each of the arms includes an extension with one extension being in the form of a panel having concentrically spaced arcuate graduated scales thereon together with associated indicia and the other extension includes a pointer having a radially inwardly extending point and a radially outwardly extending point associated with the graduated scales for indicating the diameter of the tool joint and identifying the tool joint engaged by the contact points.

Abstract: A gage for checking at least one characteristic of the threads of a threaded member comprising a supporting structure, and a carriage including first and second elements mounted for movement on the supporting structure. The threaded member is mounted on the supporting structure. A standard member having a standard surface defining precisely the characteristic which is to be checked is also mounted on the supporting structure. One of the members is mounted for movement. The first and second elements are adapted to cooperate with the threads of the threaded member and the standard surface of the standard member, respectively. Movement of the movable member provides an indication of the characteristic of the threads which is to be measured.