Abstract: A digital display measuring apparatus including a movable contact on the body of the measuring apparatus to engage with an object to be measured, an encoder for converting the displacement of the contact into an electrical output signal, a counting circuit for counting the output signal of the encoder, and a digital display for indicating the counted value from the counting circuit. The digital display further includes a measurement indicator unit for indicating the displacement of the contact and a preset indicator unit for indicating a preset value higher than those indicated in the measurement indicator unit. The preset indicator unit includes a presetting device for supplying a reference value to the preset input of the preset indicator unit. With this apparatus even if the object to be measured has a length exceeding the maximum displacement of the contact, the full length of the object may be measured and indicated.

Abstract: A height gauge has a touch signal probe provided on a slider vertically movably supported on a support for the purpose of measuring the dimensions or the like of an object by bringing the probe into contact with the object. A rack is formed on the support, and a driving shaft is disposed on the slider, the driving shaft having a pinion engaged with the rack. To the driving shaft are secured a pulley to which the turning force from a motor is transmitted and a control wheel for manually rotating the driving shaft. A clutch member is interposed between the pulley and the control wheel. When the clutch member is engaged with the pulley, the slider is automatically moved up and down, while when the clutch member is engaged with the control wheel, the slider can be manually moved up and down. The height gauge further includes a control circuit which stops the drive of the motor when the touch signal probe generates a touch signal and which holds the indication of a measured value being displayed at that time.

Abstract: A coordinate measuring instrument for measuring a shape or the like of a work to be measured by a relative displacement value between a measuring element (28) and the work (30). The measuring instrument includes displacement detectors (23, 25, 27) for detecting displacement values of the measuring element (28) relative to the work (30) in the directions of X-, Y- and Z-axes and portable detecting units (35, 38) each having a displacement detector, and these detectors are connected to an input circuit (41) of a processing unit (32) in which the data is processed to output the measured value. The detecting units (35, 38) are selectively used depending on portions to be measured of the work.

Abstract: A surface roughness measuring instrument wherein an analogue output signal from a displacement detector (32) for electrically detecting a turning displacement of a measuring arm (5) is converted into a digital signal, and this output signal is interpreted to thereby provide measure of surface roughness of a work (18) to be measured. This surface roughness measuring instrument divides a length to be measured, which is set by a setter (42) by a number of samplings N, i.e. 2.sup.n, which are arranged equidistantly, and includes a timing circuit (40) for sampling-controlling an analogue/digital converter (39) at the times of samplings.

Abstract: This invention relates to a method of measuring by a coordinate measuring instrument and the coordinate measuring instrument, wherein a probe to be brought into abutting contact with a work to be measured is moved in two- or tri-dimensional direction by a robot mechanism provided independently of a main body of measuring instrument. A moving path of the robot mechanism is preset, and, when a command to carry out a predetermined measuring program is given from a data processing unit, the robot mechanism is moved in accordance with the moving path, and a measured result is calculated to seek a dimension of the work, on the basis of measured data given through an abutting contact between the probe and the work.

Abstract: An edge detecting device in an optical measuring instrument for detecting a transmitted or a reflected light to directly or indirectly measure a dimension of an object to be measured is disclosed. The edge detecting device comprisesA sensor including two light receiving elements disposed coaxially with each other and the two light receiving elements so as to produce phase shift signals in response to a bright or a dark portion during the relative movement. Levels of sensor output signals appearing at sensor output terminals in response to outputs of the light receiving elements become equal in value to each other each time the bright or dark portion is generated during the relative movement.

Abstract: An edge detecting device in an optical measuring instrument for detecting a transmission or a reflected light to directly or indirectly measure a dimension of an object to be measured, the detecting device comprises: a sensor including two light receiving elements disposed on a moving plane of a relative movement between the object to be measured and the two light receiving elements so as to produce phase shift signals in response to a bright or a dark portion during the relative movement; a difference calculator connected to sensor output terminals in the sensor, for calculating a difference between the phase shift signals; a region signal generator for comparing a differential output signal of the difference calculator with reference signals of high level and low level, producing hold signals when the differential output signal is present between the high level and the low level, holding one sensor signal out of the sensor output signals, and outputting a signal in a specific region including a cross point

Abstract: A method for indicating measured value data of a measuring instrument, in which the measured value data of a workpiece to be measured is measured by a measuring instrument, such as slide calipers and the data indicated histogrammatically. There are present divided sections obtained by evenly dividing a set range of a measured value by a divisor, judging which divided section each of the measured value data, which has been successively taken in, belongs to, and storing the frequencies of measurement of the measured value data. The frequencies of measurement thus stored are divided by a predetermined weight coefficient to obtain a quotient, and the aforesaid divided sections are printed histogrammatically as marks representing minimum integers larger in value than the quotient, with the maximum value of variability having a value suitable for being received in the maximum indication places, so that the mean value, variability and the like of the measured values can be readily recognized.

Abstract: The invention provides an optical measuring apparatus in which an object to be measured is scanned by parallel measuring rays, the length of the object being measured from changes of intensity of the measuring rays. The received rays are utilized as start and stop signals from a counter for counting clock pulses. The measuring rays are emitted from a laser and reflected by a rotating mirror to scan the object. When the measuring rays are blocked by the object, the counting operation of the counter is initiated. As the rays again appear from behind the object, the counting operation is stopped. The number of clock pulses counted between the start and stop of the counting operation is used to measure the length of the object. Any error induced from deflection or scattering of the measuring rays at the end faces of the object or from the transparent part of the object can be avoided by providing a register for latching the output of the counter.

Abstract: A microscope wherein a plurality of objective lens barrels (25) are mounted to a disk (23) in such a manner that the axial lines thereof are in parallel with the center axis of the disk (23), the disk (23) is rotatably provided on the undersurface of an upper frame (12A) of the main body (12) in such a manner that the axial line thereof is in parallel with the optical axis (18) of the main body, a large diameter screw (50) having a recess (50B) is affixed to the top surface of the upper frame (12A) a three lens barrel (13) is rested on this large diameter screw (50) and fixed to the large diameter screw (50) through a clamp member (14), and further, rectangular prisms (60) and a roof prism (74) for making it possible to visually observe a non-inverted image are provided in the three lens barrel (13).

Abstract: In an optical measuring device including: a parallel scanning ray beam generator having a rotary mirror for reflecting incident ray beams from a beam generator and converting the same into rotary scanning ray beams and a collimator lens for converting the rotary scanning ray beams into parallel scanning ray beams; and a light receiving element for detecting bright and dark portions of the parallel scanning ray beams which have passed through the workpiece to be measured; whereby a dimension in the scanning direction of the workpiece to be measured is sought from a length of time of a dark portion or a bright portion generated due to the obstruction of part of the parallel scanning ray beams by the workpiece to be measured which is interposed between the parallel scanning ray beam generator and the light receiving element, the incident optical axis of ray beams directly or indirectly emitted from the beam generator to the rotary mirror and an optical axis of the collimator lens for converting the rotary scanni

Abstract: This disclosure depicts a ray beam converter having a rotary mirror driven by a motor, for reflecting ray beams to convert the same into rotary scanning ray beams in an optical measuring instrument wherein the ray beams from a beam generator are converted into the rotary scanning ray beams to be scanned in one direction and dimensions of a workpiece to be measured are measured by utilization of the rotary scanning ray beams. A rotor of the motor is rotatably supported by bearings at a plurality of positions in a direction of the rotary axis of the motor, and the rotary mirror is integrally formed on the rotor at a portion of the rotor supported by at least two bearings to each other out of the bearings. The rotary mirror is integrally formed on the rotor at a portion of the rotor supported by at least two bearings, and the rotor is rotatably coupled to a spindle affixed to a stator of the motor through the bearing.

Abstract: A photoelectric type displacement detecting apparatus, such as a digital display dial gauge micrometer, with an improved frequency response, comprising optical lattice means, light emitting means for irradiating the optical lattice means with a detecting light, light receiving means for receiving a transmission or reflective light from the optical lattice means, and a detection circuit for generating an output signal indicative of relative movement in the lattice. The frequency characteristic of a phototransistor adapted in the light receiving means depends on the input impedance of a base-grounded transistor to maintain the current supplied to the light emitting means constant and to improve the frequency response in the detection apparatus.

Abstract: A displacement detector utilizing changes of capacitance detecting the moving amount of the moving element by means of electric detection of changes in capacitance between the electrodes moving relatively. To the base of the detector is fixed a stator plate on which a plurality of transmitting electrodes are arranged at equal distances and a receiving electrode is zonally arranged in parallel with the transmitting electrodes. On the other hand, on the moving plate facing to the stator plate and slidingly established on the base, connecting electrodes are facingly installed in the spanning state over to both of the transmitting electrodes and the receiving electrode on the stator plate, and the transmitting electrodes and the receiving electrode are of electrostatic combination.

Abstract: A coordinate measuring instrument wherein a measuring element is related to a work to be measured, and a configuration or the like of the work is measured from a displacement of this measuring element. In this measuring instrument, one of supports is supported by one of guide rails in a manner to be positionally adjustable in direction of X- and Z-axes and the other of the supports is supported in a manner to be displaceable only in a direction of one of the guide rails. A slider guide rail racked across the supports can be adjusted in its posture in the direction of X- and Z-axes by a posture adjusting mechanism provided on connecting portions between the slider rail and the supports. The slider guide rail thus adjusted in posture in non-displaceable in the moving direction of a slider in a state where adjustment members provided on the slider guide rail are closely abutted against abutting surfaces of the supports.

Abstract: An indicating device in a measuring machine in which the flickering of an indicated value due to vibrations of the machine and the like is avoided. The indicating device includes a flickering sensing circuit for receiving up signals or down signals outputted from an encoder as input signals thereto and sensing the change in the signals from the up signals to the down signals and vice versa. When the change in the signals is sensed by this flickering sensing circuit, a hold signal having a predetermined period of time is outputted from a hold circuit, whereby renewing storage of counted values from the counter by a latch circuit is interrupted for a predetermined period of time.

Abstract: A surface tracer having a probe to trace the surface profile of a work continuously and read out the shapes of the work to three-dimensional coordinate electrical signals. The probe is rigidly connected with an X-axis slider which is supported on a base through Y- and Z-axis sliders so as to be slidable perpendicular to each other such that the probe can be slided on the surface of the work. The Z-axis slider is suspended from the base by a suspending spring to support the other X- and Y-axis sliders. Between the base and the X-axis slider a return spring for providing returning force to the probe to its original position is adopted. Pressurized air is supplied to the sliding face of each of the sliders to form an air bearing thereon.

Abstract: The present invention relates to a digital indication type measuring apparatus comprising a main body of the measuring instrument such as slide calipers, incorporating therein a data processing circuit for digitally indicating measured data and a printer detachably connected to the main body of the measuring instrument. The connection between the main body of the measuring instrument and the printer is effected by a jack provided on the main body of the measuring instrument and a connector provided at the forward end of a cord extending from the printer. A switch for outputting the measured data to the printer is provided on the connector, whereby it becomes possible to use the main body of the measuring instrument such as the slide calipers as a single component or to print the measured data as necessary, so that the functional effect of the measuring instrument can be expanded.