Abstract: Height gauge characterized in that a clamp body, which is slidably supported on a main beam, rotatably supports a clamp lever and one end of the clamp lever is directly or indirectly pressed against the main beam by the force of a spring, thereby making it possible to simply and quickly clamp the clamp body which supports a slider.

Abstract: Two-leg vernier calipers characterized in that it consists of a main beam assembly comprising two legs parallel to each other, a vernier assembly supported on the main beam assembly and separate measuring jaws for the main beam and the vernier fitted thereto; each measuring jaw can be selected depending on the type of instrument to be assembled, thereby making it possible to standardize the main beam assembly and the vernier assembly; and accordingly the main beam assembly and the vernier assembly can be made of different materials from the measuring jaws; and the manufacturing method of this two-leg calipers, in which the measuring jaws are fixed at right angles to the two legs of the main beam and the vernier, thus rendering it needless to fit together their measuring surfaces after assembling.

Abstract: A vernier caliper includes a main beam body consisting of two round rods parallel to each other and connected together at one end by a jaw, and at the other end by a rear frame. A vernier is supported freely and slidably on the rods. The rods can be hollow and can have their respective ends inserted into openings of the jaw and rear frame and secured in the openings with adhesive, solder, or screws. A rack can be formed on one of the rods to drive, for example, a dial indicator, and graduations can be provided on a rod to read the measurement taken with the vernier. This construction provides a more accurate vernier caliper which can be precisely assembled without grinding, for example, jaw faces, after assembly to calibrate the caliper.

Abstract: An improvement in the combination of a cylindrical outer frame which is coaxially rotatably mounted on the outside of a cylindrical inner frame as disclosed. The improvement which maintains a sealed condition between the two frames includes a first circumferential groove on the outside of the inner frame, this groove having sloped sidewalls. A second circumferential groove is provided on the inside surface of the outer frame opposite the first groove, the second groove having parallel sidewalls. A sealing ring is positioned within the space defined by the first and second grooves and contacts opposing sidewalls of the two grooves. A biasing means is provided for axially biasing the inner and outer frame with respect to each other so as to assure the sealing condition established by the sealing ring.

Abstract: An inside dimension measuring gauge is disclosed having a spindle within a tubular body which actuates a plurality of contact pistons, the measurement being indicated by sensing the displacement of the spindle. A pair of opposed levers pivotally mounted to the tubular body are provided for axially displacing the spindle with respect to the tubular body upon manual application of a compressive force on the pair of levers. The pair of levers are connected to the axial spindle by a pair of movable links and are further provided with screws for regulating the permitted motion of the levers with respect to the tubular body.

Abstract: The invention is constituted such that a tubular cavity is formed in the arm of a frame which movably supports the spindle; said cavity houses an index scale and a slit disc; and thereby the measured results can be read as an electric signal without affecting the function of the micrometer, said index scale and said slit disc being located coaxial with the spindle.

Abstract: A dial type indicator in which the zero point on a scale fixed to a rotatable tubular outer frame can be set to the position of the pointer by rotating the outer frame around a circular inner frame. An elastic element at one side of the inner frame is pressed against the inner peripheral face of the outer frame by compressing the element in the thickness direction of the inner frame, using a manually adjustable arrangement to compress the element and cause it to extend laterally. In this manner the inner and outer frames can be reliably fastened together without damage to the outer frame and the operability of the outer frame is improved.

Abstract: The present invention is characterized in that a measuring jaw is constituted as a separate entity from a main beam; this jaw is axial-slidably supported on the main beam; and said jaw can be urged by a spring force in a selectable direction so that the inside and outside measurements can be done at a constant pressure with no error.

Abstract: A measuring instrument with two feeds for its spindle. A first sleeve is keyed to a second sleeve so the sleeves can move axially relative to each other but cannot rotate relative to each other. A spindle is threaded into the second sleeve and moves axially when its thimble is rotated to provide the first feed. A second thimble has a first thread engaging a thread of the first sleeve and a second thread engaging a thread of the second sleeve. Rotation of the second thimble moves the second sleeve and spindle axially to provide the second feed. The first and second threads can be selected to provide a fine feed or a coarse feed of the second sleeve and spindle.

Abstract: The present invention relates to a micrometer constituted such that an anvil is supported on a frame by means of parallel leaf springs so that the displacement of said anvil may be magnified and transmitted by a sector gear to a pointer; and said leaf spring is urged toward the spindle by another spring.

Abstract: A measuring instrument in which a slider slidably attached to a main bar is urged in one sliding direction or in the opposite sliding direction by means of a spring, the urged direction of the slider being switchable, and a displacement between the jaw of the main bar and the jaw of the slider with respect to a preset reference position is displayed on a dial indicator, so that measurement of the internal dimensions as well as external dimensions can be performed under the action of a constant resilient force.

Abstract: The present invention relates to a hole gauge for measuring the inner diameter of a hole, which gauge comprises an axially movable spindle; a pair of tapered surfaces movable together with said spindle; a pair of contact points radially movable with respect to said spindle, guided by said pair of tapered surfaces; and a support arm for said pair of contact points, the outer surfaces of said contact points and said support arm being movable in parallel radially of said spindle.

Abstract: A micrometer head with a double counter including a first digital counter for displaying the displacement of an axially movable spindle in the positive direction, and a second digital counter for displaying its displacement in the negative direction, which counters can give direct readings of the positive and negative displacements of the spindle.

Abstract: A portable, lightweight measuring instrument comprising a main beam and a slider which are relatively displaced to carry out a measurement, a counter which indicates the relative displacement between said main beam and said slider by rack-and-pinion combination, and a dial gauge separate from said counter, both said counter and said dial gauge being mounted on said slider.

Abstract: In a dial indicator gauge in which a stopper pin is provided on a spindle having a contact point so as to restrict the displacement range of the spindle by having the stopper pin come into contact with an inner face of an inner frame of the dial indicator gauge, the dial indicator gauge has a buffer member for softening and absorbing impact force as the stopper pin approaches said the inner frame face.

Abstract: Profile indicator in which by displacing an arm, a stylus attached to one end of the arm follows the contour of a surface to be measured, characterized in that said stylus attached to the arm is linearly displaced to the surface to be measured with use of a link mechanism to trace said surface.

Abstract: An indicator for a measuring apparatus comprising a rigid ruler, a slider mounted to slide along said ruler, and a dial plate having scales graduated in different units for indicating the amount of displacement of said slider in different units, said dial plate being provided with two needles arranged to be moved in dependence on the linear displacement of said slider by their respective rotating mechanism so as to indicate the amount of said displacement in different units.

Abstract: Dial gauge for measuring length in two different units, characterized in that a first gear and a second gear are mounted to rotate with a pinion which meshes with a spindle rack; a center pinion fixed to a first pointer meshes with said first gear; a pinion fixed to a second pointer meshes with said second gear; and the gear ratio between said center pinion fitted with the first pointer and said first gear is different from the gear ratio between said pinion fitted with the second pointer and said second gear.