Abstract: A contact point type measuring device being equipped with contact point type encoder having scale contact points and brushes to supply pulse type measured signals, a counter circuit and a display section of measured value, such device comprising the scale contact points consisted of larger scale contact points arranged in a required distance and of smaller scale contact points dividing the larger scale contact point distance at a certain required pitch, the counter circuit including a larger scale counter counting larger scale measured signals obtained from the larger scale contact points and a smaller scale counter counting small scale measured signals obtained from the smaller scale contact points and resetting such counted value by the larger scale measured signals, and the display section of measured value including an upper figure displayer displaying counted value of the larger scale counter and a lower figure displayer displaying counted value of the lower scale counter, and parts of such device being

Abstract: A clamp device of a height gauge for clamping to a support a feed box connected to a slider through a fine movement means. In this clamp device, a lever, one end portion of which can abut against the support, is rotatably supported by the feed box, and a biasing means for biasing the lever to abut the aforesaid one end portion against the support is provided between the lever and the slider, whereby a moment to tilt the feed box does not act on the feed box even when the lever is grasped to release the clamping, so that the feed box and the slider can be moved smoothly.

Abstract: A spindle driving mechanism includes a spiral groove having a comparatively large pitch for transferring a spindle and an engageable portion to be engaged with this spiral groove. The spindle is provided with a rotation preventing device, and an indicator is driven by an axial movement of the spindle.

Abstract: A cylinder gauge capable of comparing and measuring a diameter of a hole of a workpiece.This cylinder gauge comprising a spindle, a head receiving the bottom portion of the spindle, a measuring element inserted into the head and linearly movable in the radial direction of the spindle, and a guide member slidably provided on the head and abutting the measuring element in a vertical state against a surface to be measured, wherein a first spring for biasing the measuring element outwardly is provided on the side of the spindle and a second spring for biasing the guide member outwardly is provided above the axis of the measuring element, so that the diameter of a shallow hole can be measured.

Abstract: A height gauge is disclosed which rests on a surface plate and is used for measurement of dimensions and marking-off operations. Supports slidably supporting sliders are planted in rotary members rotatably provided on a base, and the measurement of dimensions and marking-off operations are performed in a state where the supports are held at inclinations by means of a locking device for preventing the rotary members from freely rotating.

Abstract: A height gauge wherein a control wheel of a driving mechanism for moving a slider at high speed is secured to the slider, and a finger grip of a fine adjustment mechanism for driving the driving mechanism at low speed so as to move the slider at low speed is mounted on the control wheel.

Abstract: An instrument is disclosed for measuring internal dimensions by effecting an absolute measurement of an internal dimension of a workpiece using two measuring elements.This instrument for measuring internal dimensions has probes of the measuring elements disposed at two points on a plane incorporating the center axis of a positioning member, the forward end portion of which has a tapered surface, and the probes are adapted to abut against the inner wall surface of the workpiece which is guided by the tapered surface of the positioning member, whereby a distance between the two probes in the aforesaid abutting state is detected by a displacement detecting device, thereby measuring the internal dimension of the workpiece.

Abstract: 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 displacement of the object under measurement and a movable scale operationally associated with the spindle, and capable of measuring the displacement of the object under measurement from a variation in physical value between the movable scale and the fixed scale due to the displacement of the object under measurement, a vane wheel is provided which is rotatable by the utilization of the reciprocatory motion of the spindle or the movable scale, so that a moving resistance increasing with the increase in the rate of travel can be given against the movement of the spindle or the movable scale.

Abstract: A displacement measuring instrument wherein the instrument comprises a main scale and a carriage movable along the main scale having thereon mounted an index scale whose graduated surface is opposed through a minute space to a graduated surface of said main scale, and a value of relative displacement between the main scale and the carriage is measured from a variation in volume of a light emitted to the main scale and the index scale and transmitted therethrough or reflected thereat due to the relative movement between the scales, is of such an arrangement that at least part of travel guide mechanisms for said carriage comprises a groove formed in the moving direction of the carriage on either the graduated surface of said main scale or the outer surface of the carriage opposed to said graduated surface and convex guide means solidly secured to the rest of the abovementioned surfaces and guided in travel by the groove.

Abstract: A projecting apparatus wherein a work on a mount is illuminated by an illuminating device and an image of the shape of the work obtained through a light transmitted therethrough or reflected therefrom is formed on a screen by means of a magnifying-projecting device, characterized in that condensing lenses in the illuminating device and projecting lenses in the magnifying-projecting device are formed into zoom type lenses and a tuning device is provided for causing the illuminating scope of the condensing lenses in the illuminating device to correspond to the projecting magnification of the projecting lenses in the magnifying-projecting device.

Abstract: A measuring instrument wherein a measuring element support member having a measuring element is made movable relative to a workpiece to be measured rested on a bedplate.This measuring instrument is provided with a rail support member which is secured in a recessed portion formed at the side surface of the bedplate through a bonding agent, a guide rail is mounted on the rail support member in predetermined position through a V-groove formed on rail support member and locking screws threadably coupled to the guide rail, and a movable member is slidably provided on the guide rail.

Abstract: An inner diameter measuring instrument wherein the measuring pressure of measuring elements is adjustable from outside and the measuring elements can be retracted by a pair of levers. A spring is confined between a movable member secured to a spindle and an abutting member formed on the outer surface thereof with a tapered surface, and a biasing force of this spring is adjustable by the movement of the movable member due to rotation of a control member mounted to the main body of the measuring instrument. The abutting member is upwardly moved by a pair of levers each provided thereon with a pusher member penetrating through the main body for pushing the abutting member, so that the measuring elements biased in the radial directions of the spindle can be retracted.

Abstract: A test indicator is disclosed wherein a rotational displacement value of a measuring element is enlarged and transmitted by a sector gear supported on a main body of the test indicator to an indicating device, and the aforesaid sector gear is urged in two rotational directions opposite to each other by two springs so that the sector gear can be held at the neutral position.The two springs for urging the sector gear are previously differentiated in resiliency from each other so as to provide two springs, one being stronger and the other weaker in resiliency, and the stronger spring is abutted thereagainst with a spring-load finely adjusting means positionally adjustably supported on the main body of the test indicator in the urging direction of the spring from the side of resisting the resilient force of the spring, whereby this spring-load finely adjusting means is adjusted in its position to vary its resilient force, so that the sector gear can be adjusted in position.

Abstract: A dial gauge wherein a mechanism for imparting a displacement of a spindle is simplified in arrangement.In this dial gauge, a link is rotated by a driving piece secured to the spindle, and a rotational value of this link is imparted to a cam member connected to a hand through a reciprocating member, so that the displacement of the spindle can be indicated.