Abstract: The modular bore gauge system comprises a plurality of modular spring-loaded bore gauge head adaptors, each having a bore gauge head on a first end thereof and having a female threaded second end, a plurality of modular spring-loaded depth extensions, each having a first male threaded end and a second female threaded end and configured to have its first end screwed onto the second end of one bore gauge head adaptors or to have its first end screwed onto the second end of another one of the depth extensions, and a modular indicator adaptor, configured to have an indicator fitted on a first end thereof and a male threaded second end and configured to have its second end screwed onto the second end of one of the bore gauge head adaptors or screwed onto the second end of a last in line of one of the depth extensions.

Abstract: A measuring device includes a housing and a caliper positioned inside the housing. The housing has a proximal end and a distal end and defines an axis from the proximal end to the distal end. The caliper includes a first measurement probe extending out of the housing in a first direction, a second measurement probe adjustably coupled to the first measurement probe, the second measurement probe extending out of the housing in a second direction that is substantially opposite of the first direction, and measurement circuitry configured for transmitting a measurement signal based on the relative positions of the first and second measurement probes.

Abstract: An apparatus for measuring an inside diameter of hole of a workpeice comprises a main body, two probing legs, two pressure sensors, a controller unit, a display unit, and a step-motor. The two probing legs have a first end and a two second end. Two pressure sensors are respectively mounted on the second end and configured from generating a pressure signal in response to a reacting force applied thereon by an inner wall in the hole. The step-motor is configured for driving the two probing legs to rotate so as to enable the pressure sensors to about against the inner wall. The controller unit is configured for controlling the step driving the probing legs to rotate in response to the pressure signal and computing a rotation angle of each probing leg.

Abstract: An inside micrometer including an inside micrometer body (1) with a first spindle (11) screwed in an advanceable and retractable manner in an axial direction, to which anvil (30) having different length in increments of a predetermined dimension and an extending collar (40) interposed between the anvil (30) and the inside micrometer body (1) are selectively attached to adjust the measurement range, has an extending rod (50) selectively attached to the inside micrometer body (1) in an attachable and detachable manner and having a second spindle 58 which is advanced and retracted together with the first spindle (11), so that the length of the second spindle (58) is added to the measurement range extended from one of the anvils (30) as well as the length of the extending collar (40), thereby reducing the number of the anvils (30).

Abstract: An apparatus for adjusting devices and for setting adjustments, in particular in a &mgr;m range, nm range and below, in particular of optical elements in semiconductor lithography, comprising a base part and a head part spaced apart therefrom., the two parts being connected to one another by at least one adjustment device, and the adjustment device having side parts, the angle of which, or the spacing between which, can be adjusted or see by a length-adjustment device.

Abstract: A thread pitch cylinder gage for an internally threaded bore in a workpiece, according to one embodiment, includes a gage post having a bearing surface extending through an externally threaded sleeve. The sleeve is trapped on the bearing surface by a retaining cap at the end of the gage post. A finger on the bearing surface engages a notch in the sleeve to prevent rotation of the sleeve relative to the bearing surface, while permitting relative axial motion. The sleeve includes two collections of retaining cavities with balls trapped therein, one at each end of the sleeve. The cavities, and therefore the balls, are centered between the flanks of a thread on the sleeve, and the balls are radially slidable between a retracted and a locked position. The bearing surface includes a plurality of sloped cam surfaces radially aligned with the balls in the sleeve.

Abstract: The adjustable measuring parallel has a head assembly that includes upper and lower slider blocks that are mated to each other at an incline, which may be a common transversal incline. The upper slider block is connected to a movable extender rod member which has connected to its other end a ferromagnetic core. The lower slider block is connected to a stationary extender member which is threaded to a handle that has a cavity in which a linear variable differential transformer (LVDT) is fitted. By moving the movable extender member in directions along the longitudinal axis of the instrument, the upper slider block is forced against the lower slider block such that relative movements are effected between the two slider blocks along a direction orthogonal to the parallel surfaces of the slider blocks, or the longitudinal axis of the tool.

Abstract: A bore gauge having a fixed and an opposing automatically-adjustable contact anvil, each such anvil having an extended length in the direction of the axis of the bore being gauged, the gauge having a body about which is adjustably secured a reference plate which sets the depth at which the contact anvils make contact with the inner wall of the device the bore of which is being measured, the adjustable contact anvil being mechanically coupled to the dial-actuating rod of a dial indicator for reading the bore diameter.

Abstract: A thread pitch cylinder gage for an internally threaded bore in a workpiece, according to one embodiment, includes a gage post having a bearing surface extending through an externally threaded sleeve. The sleeve is trapped on the bearing surface by a retaining cap at the end of the gage post. A finger on the bearing surface engages a notch in the sleeve to prevent rotation of the sleeve relative to the bearing surface, while permitting relative axial motion. The sleeve includes two collections of retaining cavities with balls trapped therein, one at each end of the sleeve. The cavities, and therefore the balls, are centered between the flanks of a thread on the sleeve, and the balls are radially slidable between a retracted and a locked position. The bearing surface includes a plurality of sloped cam surfaces radially aligned with the balls in the sleeve.

Abstract: A computerized gauge measures dimensions, typically in the range of 6.1865" to 6.1917" accurate to .+-.0.001", typically the diameter of a steel railroad car axle. The gauge simultaneously senses the temperature, typically within a range of -20.degree. F. to 100.degree. F. +1.degree. F., of the axle workpiece. In consideration of the predetermined coefficient of expansion of the workpiece, the gauge calculates the dimension that the workpiece would exhibit should it be thermally brought to a predetermined, 59.degree. F. by convention, reference temperature. From the workpiece-temperature-compensated dimension resulting from such calculation, the axle may be recognized as being (i) oversized but repairable, (ii) within an acceptable size range, (iii) undersized but repairable, or (iv) undersized and unrepairable.

Abstract: The present invention relates to an inner diameter measuring machine, wherein a displacement measuring and displaying device provided with a group of first switches for setting measuring conditions are disposed on the generally central portion of a main case of measuring machine. One end of a casing is formed to provide a head having a measuring element or elements, and the other end thereof is formed to provide a handle portion. In the handle portion, two sets of groups of second switches having a switch and the like for holding a displayed value during measuring are provided, so that one hand operation can be performed during measuring. Further, in the handle portion, a plunger axially movable in cooperation with a spindle is provided, whereby this plunger is moved through a control lever rotatably supported on the end portion of the casing.

Abstract: An automatic cylinder profiling gage system comprises a measuring head adapted to fit into a cylinder and including a number of transducers associated therewith, each transducer generating a positional signal corresponding to the distance from the head to the interior wall. The gage further includes a processor adapted to receive the signals, compare them with stored data indicative of the profile of an ideal cylinder so as to determine deviation therefrom. The system is further adapted to provide a visual display of data relating to cylinder profile. The gage system may further include calibration means as well as particular computer programs for processing information generated thereby to provide statistical or other information.

Abstract: A gaging head assembly for use on dial bore gages and the like for gaging the diameter and surface characteristics of cylindrical work surfaces including an elongated tubular member having first and second end portions and an opening extending therethrough, an adjustment member positioned for axial movement in the opening, the tubular member being attachable at the first end portion to a dial bore gage and having pairs of opposed work engaging elements adjacent to the second end portion for movement primarily in a radial direction to change the gaging diameter thereof, the adjustment member having a tapered end portion located inwardly of the work engaging elements to simultaneously engage and radially move the pairs of opposed work engaging elements during axial movements thereof, one of the pairs of opposed work gaging elements extending radially outwardly a greater distance than the other pair of opposed elements in all positions of adjustment of the adjustment member.