A measurement device includes: a probe part including a probe configured to measure a surface of an object to be measured and is attached so as to swing around a swing center according to a shape of the surface of the object to be measured; a scale configured to measure displacement by swinging of the probe part; a scale head configured to read a scale mark of the scale; and an arm part to which the probe part is attached, the arm part is attached so as to swing around the swing center integrally with the probe part, and the scale is attached to the arm part. When thermal expansion coefficients of the probe part, the arm part and the scale are α, β and γ respectively, the measurement device satisfies a condition of

[00001]$\left(\alpha +\gamma \right)-1\text{}/\text{}2\alpha \text{}\le \text{}\beta \text{}\le \text{}\left(\alpha +\gamma \right)+1\text{}/\text{}2\alpha .$

An adjustable square has a blade including a scale, a body, a slot formed in the body for movably receiving the blade, a locking mechanism operably engaged with the body for releasably securing the blade within the slot, and an indexing member operably engaged with the body and operably engaged with the blade. The indexing member indexes the body at precise locations along the blade. A method for indexing an adjustable square is also provided. The method includes positioning a body of the adjustable square at a precise known position and indexing, with an indexing member of the adjustable square, the body of the adjustable square at the precise known position.

A gage tool having a stem and two concave curved ports adapted to fit snugly to the curved convex corners of a resilient mount facilitates easy and precise measuring of the resilient mount's alignment and snubber gap height.

A modular gage system includes a base plate having an array of holes and a coordinate system to identify each hole. The modular gage system further includes a plurality of risers and at least one form block. Each riser is assigned to a particular hole and the at least one form block is configured to be positioned atop one or more of the risers. Moreover, each form block is assigned to be located over a particular hole.

A caliper measurement force detecting device includes a fixed unit that is securely attached to a slider so as not to displace relative to the slider; a movable unit that is provided to allow a slight displacement relative to the fixed unit along a direction parallel to a displacement direction of the slider; and pressure detectors that are arranged between the fixed unit and the movable unit and are provided so as to detect pressure applied in the direction parallel to the displacement direction of the slider. The movable unit includes an alternative finger hook that is arranged near a finger hook of the slider and serves as an operator that pushes and pulls the slider instead of the finger hook of the slider.

A self-supporting template for an electrical receptacle cutout and method of using the template. The template includes a base plate with template openings, an upright on the base plate, a biased reciprocating push button, and at least one sharp. The push button is secured to the upright for transverse reciprocation between a biased first position spaced furthest from the base plate and a second position spaced closest to the base plate. The at least one sharp reciprocates concurrently with the push button wherein the distal tip is fully recessed when the push button is in the first position and protrudes a fully extended distance in the second transverse direction from the lower major surface of the base plate when the push button is in the second position.

A service tool and method of using for calibrating a position of a cutting edge of a blade. The service tool may comprise an inward-side face disposed between a first face and a second face. The inward-side face may include a curved portion, a leg portion and a notch configured to receive the cutting edge. The first face includes a curved edge, a plurality of horizontal lines and a plurality of vertical lines. When the cutting edge is received in the notch, and the curved portion abuts the top face of a bolt, the plurality of horizontal lines is configured to measure a vertical distance from a center of the top face to the cutting edge, and the plurality of vertical lines is configured to measure a horizontal distance from the center of the top face to the cutting edge.

A measuring board having a simple structure is to be provided. A measuring board includes a main body having a foldable structure, and the main body includes a placement part on which a foot is placed and that includes a measurement marker, a wall part provided adjacent to the placement part and configured to position a heel during measurement, and supporting structures and that support the wall part. With such a configuration, a measuring board having a simple structure can be provided.

There is provided a test indicator 100 capable of replacing a stylus 210 with another stylus 210 having a different length to increase a reaching range of the stylus 210, and of increasing a rotation angle of the stylus 210 to display an accurate measurement value in a wide measurement range.

A calculation unit 400 of the test indicator 100 includes a stylus-length storage unit 420 that sets and stores a length of the stylus 210, and a stylus-length correction calculation unit 400 that changes, according to the length of the stylus 210, a conversion ratio for converting a detection value by an encoder 340 into a measurement value to correct the measurement value. The calculation unit 400 further includes a rotation-angle calculation unit 410 that calculates a rotation angle αs[rad] of the stylus 210 based on the detection value by the encoder 340 and an arc-chord error correction calculation unit 400 that multiplies a sine value using the rotation angle αs calculated by the rotation-angle calculation unit 410 as an argument to correct the measurement value.

There is provided a measuring tool attachment cover that combines ease of holding and performance (for example, heat insulation). An attachment cover includes a front face layer 110, a rear face layer 120 and an intermediate layer 130. The front face layer 110 and the rear face layer 120 are compact layers with low porosity, and the intermediate layer 130 is a hollow structural layer with higher porosity than the front face layer 110 and the rear face layer 120. The hollow structural layer includes two or more layers with different porosity, and a layer of the two or more layers closer to the front face has higher porosity than a layer closer to the rear face. A direction from the rear face layer 120 to the front face layer 110 is a thickness direction, and a direction orthogonal to the thickness direction is a width direction. The hollow structural layer has elastic modulus distribution in the width direction, and an elastic modulus of a certain area is different from an elastic modulus of an area surrounding the certain area.