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| Number | Title | Issue Date |
| 4513507 | Contact sensing probe for a measuring apparatus A coordinate measuring machine probe of the type including an arrangement for detecting contact with a surface, in which a light source and a plurality of photocells are arranged to generate an electrical signal upon probe pivoting motion by detection cha... | 04/30/1985 |
| 4509262 | Mounting arrangement for length measuring device A length measuring system for measuring or adjusting the relative position of two objects includes a housing for a scale. This housing is fastened to a mounting surface of one object by means of at least one clamping shoe which engages a groove in a side ... | 04/09/1985 |
| 4483077 | Digital measuring device A digital measuring device having a relatively rigid slide and a flexible, substantially transparent band with opaque indicia placed thereon, the band being capable of being pulled centrally through an opening in the slide. The slide houses a plurality of... | 11/20/1984 |
| 4481719 | Drafting apparatus A drafting table and measurement system which utilizes a read head for measuring the displacement of a straight edge overlying the drafting table. The drafting table mounts two perpendicularly disposed straight edges, one of which moves to and fro along t... | 11/13/1984 |
| 4479716 | Incremental measuring instrument An incremental length or angle measuring instrument includes a scale having a line grid and a plurality of reference marks. A scanning unit is provided with a plurality of photosensors to scan both the line grid and the reference marks. A reference mark s... | 10/30/1984 |
| 4477189 | Photoelectric incremental measuring device An incremental measuring device is described which includes a measuring scale and a scanning unit. The measuring scale includes a division grid, a reference track which includes a plurality of reference marks, and a control track which includes a pluralit... | 10/16/1984 |
| 4465373 | Encoder An interpolation encoder comprising a sensor array, a code plate arranged in opposition to the sensor array and having a plurality of groups of lattice patterns, and an arithmetic unit for processing data of the code plate detected by the sensor array. Th... | 08/14/1984 |
| 4461083 | Length or angle measuring instrument In a measuring apparatus of the type having a measuring graduation which is scanned by a scanning unit that includes a scanning plate, the scanning plate is provided with at least two phase shifted scanning fields which are phase shifted with respect to o... | 07/24/1984 |
| 4459750 | Reference mark selection arrangement for measuring instrument An incremental measuring instrument having a series of reference marks extending alongside a division of a scale is provided with a selector element which is slideable along the length of the scale and can be aligned with a selected one of the reference m... | 07/17/1984 |
| 4455918 | Elevation protractor for trunnioned guns A protractor for determining the elevation angle of a gun by direct measurement of the included angle between a first radius of a trunnion and a second radius of an associated trunnion bearing, includes a linearly extensible measuring device with digital outpu... | 06/26/1984 |
| 4448531 | Displacement measuring instrument In a displacement measuring instrument comprising a case having a substantially enclosed construction, a fixed scale solidly secured to the case, a spindle abutted at the forward end thereof against an object under measurement and reciprocated due to a di... | 05/15/1984 |
| 4430781 | Method of producing a scale U-shaped forms (1a) are cut in a band (1) consisting of electrically conductive material, which free cut the future measuring elements (1c) except for a connection at one side with band (1). The band (1) is placed on an insulating base (2) and connected w... | 02/14/1984 |
| 4414754 | High resolution compass card position decoder The angular position of a compass card or like rotary encoder disk includes the utilization of an optical pickoff system in which the accuracy associated with a digitally encoded disk is enhanced through the utilization of a secondary analog optical picko... | 11/15/1983 |
| 4409479 | Optical cursor control device An optical cursor control device or "optical mouse" is disclosed for use with an interactive, display oriented computer system to provide movement for a visible cursor from position to position on a display screen of such a system. The cursor control devi... | 10/11/1983 |
| 4403859 | Photoelectric incremental measuring apparatus An improved photoelectric incremental measuring apparatus for measuring the relative displacement of two objects is disclosed, the apparatus including a measuring scale and a scanning unit for scanning the scale having a reticle, the scale and reticle eac... | 09/13/1983 |
| 4385836 | Photoelectric digital position measuring system An improved digital photoelectric position measuring device of the type comprising a scale, a scanning unit for generating scanning signals, and an evaluating circuit for evaluating the scanning signals, wherein the scanning unit includes at least one pho... | 05/31/1983 |
| 4377036 | Precision measuring apparatus having a measuring interval sealed from environmental influences a precision measuring apparatus (0) defining a measuring interval sealed from environmental influences comprises a shielding housing (10) surrounding a measuring interval and defining within the housing wall a slit (10a) oriented along the measuring inter... | 03/22/1983 |
| 4367589 | Drafting machine head A drafting machine head in accordance with this invention is provided with a rotatable drawing ruler carrier whose angular position on a graduated circle is incrementally detected by means of scanning elements and is converted into displayable angular val... | 01/11/1983 |
| 4363964 | Incremental measuring system with selectively designated reference marks An incremental measuring instrument having a series of fixed reference marks along one edge of the grid scale is disclosed in which a series of movable magnets or occluding screens are located along the opposite edge of the grid scale so that any subset o... | 12/14/1982 |
| 4318617 | DC Shift error correction for electro-optical measuring system In an electro-optical measuring system which utilizes a sin/cos signal pair to determine the extent and direction of physical displacement, measurement errors often occurring as a result of extraneous DC level shifts in generated signals are corrected in ... | 03/09/1982 |
| 4295742 | Longitudinal measuring device A guiding apparatus for guiding and positioning a scanning unit in a longitudinal measuring device is disclosed wherein the measuring device includes a measuring scale, a driving unit for connecting the device to an object whose position is to be measured... | 10/20/1981 |
| 4275965 | Long stroke, high resolution optical position sensor A high resolution optical position sensor for measuring the linear displacement of a reciprocating device with a long stroke, includes a code plate having a substrate comprised of a fiber optic faceplate having a plurality of parallel optical waveguides w... | 06/30/1981 |
| 4273447 | Pivotable mount for scanning unit A scanning unit for a measuring instrument including a measuring scale is pivotably mounted to a mounting member by a strip of material which forms a solid hinge which permits the scanning unit to pivot with respect to the mounting member about an axis su... | 06/16/1981 |
| 4262423 | Error correction apparatus for a length-measuring instrument and method for generating an error correction profile An error correction apparatus for a precision measuring instrument includes an error correction profile which is formed as an integral part of a structural member of the measuring instrument, thereby avoiding the need for a separately mounted and adjusted... | 04/21/1981 |
| 4250381 | Linear scale type measuring device A linear scale type measuring device wherein an index scale mounted on a slider is opposed to a linear scale, the displacement of a movable member is imparted to said slider through connecting means and the relative displacement between the linear scale a... | 02/10/1981 |
| 4184262 | Device for determining the exact position of two members linearly displaceable relative to each other An apparatus is disclosed for determining the position of one of a pair of linearly displaceable members relative to the other, including a scale secured to one member parallel with the axis of linear displacement, and an electrooptical scanning head conn... | 01/22/1980 |
| 4169316 | Vibration resistant measuring device A vibration resistant measuring device is disclosed of the type which includes a scale and a scanning unit which is guided along the scale. This device includes a compensating mass connected to the scanning unit to counteract and reduce the tendency of th... | 10/02/1979 |
| 4158509 | Instrument for measuring lengths A scale assembly is provided with a scale which has a predetermined scale increment. The scale assembly consists of a plurality of scale sections, each of which is provided with a length portion of said scale and which are separated by joints having in th... | 06/19/1979 |
| 4136958 | Encapsulated measuring apparatus An encapsulated measuring apparatus including a hollow body provided with a longitudinal aperture, a measuring scale and a scanning assembly positioned within the hollow body, connecting means for attaching the scanning assembly to a mounting, and sealing... | 01/30/1979 |
| 4095903 | Measuring apparatus A measuring apparatus for measuring or adjusting the relative position of two objects, including a measuring scale, and a reading unit for the measuring scale connected in a hinge-like manner by means of a coupling to an object whose relative position is ... | 06/20/1978 |
| 4037325 | Linear glass scale height gage Apparatus for measuring which is adapted for use with a remote digital readout. The measuring apparatus includes an elongated main beam and a measuring device slidably mounted on the beam. The beam includes a transparent ruled scale with markings position... | 07/26/1977 |
| 4031595 | High precision incremental distance measuring system Measuring apparatus using the vernier fringe concept of measurement to provide a precise digital numeric indication of displacement between two relatively movable members. The apparatus includes an accurately ruled grating or scale, a housing for supporti... | 06/28/1977 |
| 3991477 | Probe for a coordinate measuring machine A probe assembly is disclosed carrying a grid grating and an index grating adapted to generate a Moire pattern upon relative movement in either or both of two orthogonal directions in a common plane. The index and grid gratings are supported for precise o... | 11/16/1976 |
| 3982837 | Method and apparatus for calibrating Reseau grids Apparatus and method for calibrating the points in a large Reseau grid with extreme accuracy. The method includes superimposing a smaller calibrated master grid on the large grid, comparing the location of the point on the large grid with the location of ... | 09/28/1976 |
| 3958336 | Device for linear measurement For accurate measurement of the linear movement of a traveller relatively to a low-torque rotary transducer, a cylindrical pulley on the transducer is driven by a wire which extends between this pulley and an idler pulley to embrace both; the free ends of... | 05/25/1976 |
| 3942895 | Linear digital readout assembly for milling machines and the like and means for mounting same A linear digital readout assembly for milling machines and the like and structure for mounting the same to the machine, comprising a preassembled, prealigned scale and reading head assembly, with the scale and reading head, respectively, carried by adjace... | 03/09/1976 |
