534results about "Slide gauges" patented technology

A speckle readhead includes a light source that outputs light towards an optically rough surface. Light scattered from this surface contains speckles. The scattered light is imaged onto an image detector, captured and stored. Subsequently, a second image is captured and stored. The two images are repeatedly compared at different offsets in a displacement direction. The comparison having the highest value indicates the amount of displacement between the readhead and the surface that occurred between taking the two images. An optical system of the readhead includes a lens and an aperture. The aperture can be round, with a diameter chosen so that the average size of the speckles is approximately equal to, or larger than, the dimensions of the elements of the image detector. The dimension of the aperture in a direction perpendicular to the direction of displacement can be reduced. Thus, the imaged speckles in that direction will be greater than the dimension of the image detector elements in that direction. Such a readhead is relatively insensitive to lateral offsets. The lens can be a cylindrical lens that magnifies the relative motion along the direction of displacement but does not magnify relative motions in the direction perpendicular to the direction of displacement. The optical system can also be telecentric. Thus, the readhead is relatively insensitive to both separation and relative motions between the readhead and the surface. The light source can be modulated to prevent smearing the speckles across the image detector. The light source can be strobed to freeze the image.

This invention relates to a magnetic displacement measurement device, which comprises a ruler body and a vernier, wherein a magnetic main ruler is fixed on the ruler body, and a secondary ruler is fixed on the vernier; the secondary ruler comprises a magnetic sensor and a measurement circuit thereon; said magnetic sensor is composed of magnetoresistances; said measurement circuit comprises at least two measurement bridges composed of magnetoresistances; the movement distance of the vernier is displayed on the display screen of the device after being detected by the magnetic sensor and being processed by the measurement circuit. The magnetic displacement measurement device provided by the invention not only can normally work in the wet and oil polluted environment, but also has the advantages of simple structure, convenient manufacture, low price, low power consumption and high precision.

A scale for an apparatus for measuring displacement is enclosed. It comprises a scale member having a plurality of rectangular gratings arranged in a periodic pattern on the glass epoxy substrate and the like, a coating layer covered on the side of the scale member on which a plural of the rectangular gratings are formed, a scale cover (film layer) which functions as a protective layer, and a scale forming material bonded to the outer portion of the coating layer by an adhesive layer so as to keep contaminants, oil or particles from intruding between the rectangular grating and the adhesive layer, for example an adhesive tape and the like.

The present invention provides devices having an elongated member, a stop slidably engaged with the member and preferably a measuring scale to determine dimensions of female reproductive organs. Preferably, the device is adapted to determine the length of the cervix in the fornix vaginae, which is used in the disclosed methods to predict the risk of preterm labor, risk of miscarriage, ease or difficulty of inducing labor, and fertility of an individual. Additional embodiments of the device determine dimensions of the fornix vaginae and dilation of the cervix uteri.

A method and apparatus for performing an operation on a workpiece using a multi-axis compliant end-effector for attachment to a robotic device. The end-effector is positioned at a nominal location of a workpiece feature on which the operation is to be performed. The end-effector is passively aligned with the workpiece feature by contacting the end-effector with the workpiece feature. The operation is performed on the workpiece feature in response to aligning the end effector with the workpiece feature.

An electronic caliper having a reduced offset position transducer that uses two sets of coupling loops on a scale to inductively couple a transmitter winding on a read head on a slide to one or more receiver windings on the read head. The transmitter winding generates a primary magnetic field. The transmitter winding is inductively coupled to first loop portions of first and second sets of coupling loops by a magnetic field. Second loop portions of the first and second sets of coupling loops are interleaved and generate secondary magnetic fields. A receiver winding is formed in a periodic pattern of alternating polarity loops and is inductively coupled to the second loop portions of the first and second sets of coupling loops by the secondary magnetic fields. Depending on the relative position between the read head and the scale, each polarity loop of the receiver winding is inductively coupled to a second loop portion of either the first or second set of coupling loops. The relative positions of the first and second loop portions of the first and second sets of coupling loops are periodic and dependent on the relative position of the coupling loops on the scale.

A workpiece positioning apparatus comprises two sets of jaws mounted on a rigid elongate bar, the jaws being adjustable to provide repeatable spacing of any arbitrary distance between the jaw sets. When two pieces of lumber, such as wall studs, are inserted into the two jaw sets, they are positioned at the specified spacing along a stringer such as a wall bottom plate. Indicia are provided on the strip indicating the English or metric measure of the distance between corresponding parts of the jaw sets, as well as enhanced indication of typical, e.g., 16-inch and 24-inch centerings used in American homebuilding. 15¼ and 23¼ inch indicia are also provided for shorter spans needed at stringer ends and corners to accommodate 4-foot-wide panels. The gap between jaws on one or both of the jaw sets is further adjustable to fit the thicknesses of the lumber being used. Longer jaws can be used to assure perpendicularity of wider workpieces to the elongate edges of the supporting construction members.

This invention relates to a magnetic displacement measurement device, which comprises a ruler body and a vernier, wherein a magnetic main ruler is fixed on the ruler body, and a secondary ruler is fixed on the vernier; the secondary ruler comprises a magnetic sensor and a measurement circuit thereon; said magnetic sensor is composed of magnetoresistances; said measurement circuit comprises at least two measurement bridges composed of magnetoresistances; the movement distance of the vernier is displayed on the display screen of the device after being detected by the magnetic sensor and being processed by the measurement circuit. The magnetic displacement measurement device provided by the invention not only can normally work in the wet and oil polluted environment, but also has the advantages of simple structure, convenient manufacture, low price, low power consumption and high precision.

Components of a measuring tool such as a main beam (11) and a slider (12) of a caliper gauge (1) are formed by a synthetic resin containing carbon nanofiber and an electro-conductive electrode (15) is formed on the surface of the main beam (11) at a predetermined pitch, so that a production process can be simplified, rigidity of the components can be enhanced, linear expansion coefficient can be reduced, and anti-frictional properties can be improved, thus enhancing durability while improving measurement accuracy.

A caliper for measuring the size of an object, especially the thickness of an object with non-planar surfaces. After measured, the caliper can be removed from the object without changing the measured value. The caliper includes a scale ruler, a vernier slidably disposed on the scale ruler, a first jaw fixedly connected to the scale ruler and a second jaw pivotally connected to the vernier. In normal state, the second jaw is kept in a position in alignment with and in parallel to the first jaw, whereby the caliper can be used to measure the object in a common manner. After measured, the second jaw is rotated to another position, permitting the caliper to be removed from the measured object.

The present invention relates to a calliper of the king used to measure tree diameters, comprising a fixed scale or a graduated rule (2) along which a slide (3) is movable, wherein the calliper includes a leg (4) attached to one end of said rule and a leg (5) attached to the slide (3), wherein measuring of said diameter is effected between said legs, and wherein said calliper includes an electronic unit for measuring the position of the slide (3) along the rule (2) and for storing measurement values and other desired data. The invention is characterised in that the graduated rule (2) includes a longitudinally extending internal cavity (8); in that a measuring element includes an electrically conductive wire (10) extending in said cavity (8) and attached to oth ends of the rule (2); in that the part of the slide (3) located at the rule (2) includes a permanent magnet (11); in that the wire (10) co-acts with a piezo crystal (19) in the close proximity of said one end (13); in that respective ends (13, 16) of said wire (10) are connected electrically to a pulse generator which functions to generate short electric pulses of predetermined duration; and in that the calliper includes detector means (18) which co-acts with the piezo crystal (19) and which is adapted to detect a geometric change in the wire (10), wherein said piezo crystal functions to emit an electric pulse in response to said geometric change.

Several caliper accessories are provided that make a conventional caliper suitable for more sophisticated applications traditionally reserved for more expensive measurement devices. One of these accessories, a magnetic caliper mounting device, has a shallow scale-bar-mounting channel for receiving the scale bar of the caliper, a retainer adapted to releasably secure the scale bar of the caliper within the channel of the caliper mount, and a magnet associated with the caliper mount to secure the apparatus to a planar metal surface. Another accessory, a caliper jaw extender, is either incorporated into a magnetic caliper mounting device or provided as a spring pack accessory to a magnetic caliper mounting device. The caliper jaw extender has a spring-biased retractor that hooks onto a caliper's movable frame and biases the frame toward an extended position. Kits are also provided comprising various combinations of a conventional caliper and accessories.

A multi-function measuring tool includes a main body having a longitudinal slide way provided on a front central area, a plurality of V-notches of different angles provided at two upper lateral edges, and a plurality of straight slots of different depths perpendicularly provided at two lower lateral edges; and a ruler slidably assembled to the slide way of the main body via a set of engaged screw and nut, and having a forward projected size-reduced head portion. For example, the V-notches are used to measure the angle of a saw tooth or a cutting angle of a lathe tool, and the straight slots to measure the height and depth of a saw tooth and the milling depth of a milling cutter, and the ruler to measure a bore depth on a workpiece.

An attachment apparatus is provided for a measuring tape having upwardly curving side edges, a downwardly, substantially perpendicular tab at a leading end, and a scale along the length between the side edges. The apparatus includes an end fitting piece and a medial fitting piece. The end fitting piece has a leg and a seat. The leg extends from the piece to provide a measuring edge. The seat is configured to secure with the tab at the leading end of the tape. The medial fitting piece has a leg and a seat. The leg extends from the piece to provide a measuring edge. The seat is configured to mount onto the tape for slidable movement relative to the end fitting leg to define a distance between the measuring edges readable from the scale on the tape.

An output-attached measuring instrument has: a measuring instrument body (1) having a circuit board (14) for processing a measurement signal from a sensor as a measurement data, an output electrode (15) for outputting the measurement data, and a connector hole (17) in communication with the output electrode and opening to an outer surface; and a connection cable (30) having a connector (32) capable of attaching to and detaching from the connector hole on an end thereof for transmitting the measurement data obtained by the measuring instrument body to an external device, the connector having a projection (33) capable of being plugged to and unplugged from the connector hole and a connector terminal (34) exposed on a surface thereof, where an elastic connector (20) having am electro-conductive portion for electrically connecting the connector terminal and the output electrode is accommodated in a space of the connector hole of the measuring instrument body and the elastic connector shuts the connector hole when the projection is unplugged from the connector hole and electrically connects the connector terminal and the output electrode through the electro-conductive portion when the projection is plugged into the connector hole.

A water-proof electronic caliber rule with digital indication is composed of displacement measuring device consisting of electric eddy sensors, metallic reflectors uniformly arranged on fixed rule by a certain wavelength, and several sensor coils installed on moving rule by a particular pitch. When an alternative current flows through said coils, an alternative magnetic field is generated in space to generate an electric eddy on said reflector. When fixed and moving rules move relatively, the magnetic field is modulated under the action of electric eddy, so measuring displacement value.

A multiple gauge assembly for establishing vehicle wheel rim and tire sizes to prevent interference with vehicle structure facing the wheel, as during directional turning of the wheel on a vehicle wheel mount, about a pivot axis angled relative to the wheel axis, comprising a first adjustable gauge to establish a rim edge radial dimension, from the wheel axis, a second adjustable gauge to establish a rim offset (back spacing) dimension in a direction generally parallel to the wheel axis, and a third adjustable gauge to establish a tire peripheral dimension generally parallel to the wheel axis, whereby clearance between the wheel and vehicle structure can be predictively ascertained, as during wheel turning, prior to installation of the wheel on the mount.

A slide caliper assembly comprises a caliper including a shaft defining a gaging surface. A first jaw is coupled to and a second jaw is slidably coupled to the shaft. Each jaw defines a gaging surface. One of the jaws is adjustably pivotable relative to the shaft about a pivot axis coinciding with an intersection of the gaging surface of the shaft and another axis extending along the associated gaging surface of one of the jaws. A case houses the caliper, and has a plurality of side edge sections defining a periphery of the case. One side edge section and an adjacent side edge section form a non-right angle therebetween such that the shaft can abut the side edge section, the first jaw can abut an adjacent side edge section, and the second jaw can abut another adjacent side edge section for calibrating or demonstrating the use of the caliper.

A flexible mount is provided for coupling a force actuator to a caliper jaw. The flexible mount includes a first mounting portion for being coupled to the caliper jaw, a second mounting portion for being coupled to the force actuator, and a flexible element (e.g., a parallel flexure) coupled between the first and second mounting portions. When a force is applied to the force actuator (e.g., by a user pushing on a thumbwheel) along the measuring axis direction, the flexible element flexes to generate a measuring force that is applied to the caliper jaw. The use of the flexible mount results in more control and a better feel for a user when attempting to exert control to provide a desired amount of force during a measuring process. The flexible mount may also utilize a fastening configuration that is compatible with existing mounting features on existing caliper jaws.

A caliper gauge (1) includes: a temperature sensor (13) that is provided on a slider (11) and detects a temperature of a main beam (10); a temperature information storage (14) that stores the temperature of the main beam (10) detected by the temperature sensor (13) and a displacement of the slider (11) relative to the main beam (10) that an encoder (12) detects concurrently with the temperature detection as temperature information of the main beam (10); and a processing unit (16) that calculates a thermal expansion amount of the main beam (10) based on the temperature information of the main beam (10) stored in the temperature information storage (14) to compensate the displacement of the slider (11) relative to the main beam (10) detected by the encoder (12) based on the calculated thermal expansion amount.

The invention discloses a level vernier caliper which is characterized in that the level vernier caliper comprises an upper arm and a lower arm which pass through a middle pore and are connected together by a major axis; the upper arm and the lower arm pass through a hole at one end and are connected at the lower ends of a main scale and an auxiliary scale by a minor axis; the main scale and a pad are arranged in a corresponding groove of the auxiliary scale; a structure for regulating a groove clearance of the main scale in the auxiliary scale is provided; a vernier and a pressure pad are arranged on the top of the notch of the auxiliary scale; a structure for adjusting and locking the exact position of the vernier on the auxiliary scale is provided. The main scale is provided with a plurality of scribed lines in increments of 1mm within limits; and the auxiliary scale is provided with 51 scribed lines in increments of 0.98mm; in a plane where a measuring round ball center passing through the upper arm and the lower arm is perpendicular to the major axis, the axel centers of the two minor axes arranged on the main scale and the auxiliary scale and the measuring round ball center passing through the upper arm and the lower arm are on a circle taking the axle center of the major axis as the center of the circle and are symmetry for the axle center of the major axis; the connecting line of the axel centers of the two minor axes is parallel to the movement direction of the auxiliary scale opposite to the main scale. The level vernier caliper can conveniently and quickly measure the diameter of a pinhole at the bottom of a micropore of mechanical spare parts or the diameter of an annular groove of the pinhole.

A workpiece positioning apparatus comprises two sets of jaws mounted on a rigid elongate bar, the jaws being adjustable to provide repeatable spacing of any arbitrary distance between the jaw sets. When two pieces of lumber, such as wall studs, are inserted into the two jaw sets, they are positioned at the specified spacing along a stringer such as a wall bottom plate. Indicia are provided on the strip indicating the English or metric measure of the distance between corresponding parts of the jaw sets, as well as enhanced indication of typical, e.g., 16-inch and 24-inch centerings used in American homebuilding. 15¼ and 23¼ inch indicia are also provided for shorter spans needed at stringer ends and corners to accommodate 4-foot-wide panels. The gap between jaws on one or both of the jaw sets is further adjustable to fit the thicknesses of the lumber being used. Longer jaws can be used to assure perpendicularity of wider workpieces to the elongate edges of the supporting construction members.

The invention belongs to a measuring tool, in particular to a multifunctional lift inspection ruler which is used for lift acceptance, installation, regular inspection and repair and maintenance. The inspection ruler comprises a main ruler and an auxiliary ruler, wherein the main ruler is in a J-shaped structure; the auxiliary ruler is in a T-shaped structure and installed on the main ruler and can longitudinally slide along a ruler bar of the main ruler to enable the ruler body of the auxiliary ruler and the ruler body of the main ruler to be abutted with each other; a digital display grating ruler is installed on a ruler bar of the auxiliary ruler; and a gauge stand at the end part of the ruler body of the auxiliary ruler and a gauge needle at the end part of the ruler body of the main ruler form a depth gauge. The invention has the advantages of reasonable design and artful concept, has multiple measurement functions and is a special tool during lift safety detection. The ruler can complete detection on various data during lift safety detection. The unique structure design can ensure that lift detection personnel are not limited by lift structure space during detection, saves the time and the labour, improves the work efficiency and reduces the labour intensity of working personnel.