Abstract: Disclosed is a micrometer with an improved a heat-insulating property. A micrometer 10 with a U-shaped frame 20 supporting an anvil 12 and a spindle 14 at tip end portions thereof so that the anvil 12 and the spindle 14 are coaxially opposed to each other is provided with a heat insulating cover 50. The heat insulating cover 50 is shaped to accommodate a bottom portion of the frame 20, and is detachable with respect to the frame 20. The heat insulating cover 50 covers a bottom face 22 of the frame 20 while supporting the bottom portion of the frame 20 by sandwiching from both sides of the frame 20.

Abstract: A method for measuring a distance with a pin micrometer includes attaching a pin micrometer support to a flange at a predetermined location on the flange in a first channel, supporting a pin micrometer in a stationary position in a second channel, and extending a measurement rod of the pin micrometer to a location to which the distance is to be measured.

Abstract: A method for measuring a distance with a pin micrometer includes attaching a pin micrometer support to a flange at a predetermined location on the flange in a first channel, supporting a pin micrometer in a stationary position in a second channel, and extending a measurement rod of the pin micrometer to a location to which the distance is to be measured.

Abstract: A pair of extensions for a gauge for measuring objects is disclosed. Various construction details are developed that provide extensions that may be used to determine the size of objects, such as gemstones, that are embedded within a structure and not accessible by conventional gauges. In a particular embodiment, a pair of extensions each having a sleeve and a member extending outward from the sleeve. The sleeve fits over a finger of the arms of a gauge and includes a set screw to attach the sleeve to the finger. The members include contact surfaces to be placed in contact the object to be measured. In another particular embodiment, at least one of the extensions has a tapered cross-section such that the distal end of the cross-section is sized to be inserted within the structure surrounding the object to be measured.

Abstract: A tool for measuring and checking the clamping force exerted by a movable spindle of a length measuring instrument such as a micrometer comprises a housing which is arranged to receive the free end of the spindle when a rim of the housing is placed against a surface of the instrument body around the spindle and the spindle is advanced, a force sensor which is located at the bottom of the housing for engagement by the free end of the spindle, and a read-out device for indicating the force exerted by the spindle as measured by the force sensor.

Abstract: A precise motion transducer is described. The transducer converts relatively large inputs, either forces or motions, into relatively small predictable and repeatable motions at the output. The input forces or motions may be produced by a Micrometer, a set of calibrated masses (weights), an electromagnetic voice coil (solenoid) or any other standard or customized device that can produce a calibrated force or motion and deliver this force or motion to the transducer. The force or motion, once delivered to the transducer body, is then transformed into a small motion which is then available to control the position or motion of a component, device or instrument.

Abstract: Extension standards are provided for outside micrometers and calipers. Sleeves engage the extension standards and the micrometer anvil and/or spindle, or the measuring surfaces of calipers, to selectably position the measuring gap and also to provide different sizes of such measuring gaps at those positions.

Abstract: A keratome includes a miniature differential micrometer having a barrel, a middle sleeve, and a inner sleeve connected by a threaded shaft having threads of two different pitches. One end of each of the middle sleeve and inner sleeve is drilled and tapped undersize and is slotted to conform resiliently to the threaded shaft. The middle sleeve is attached to a keratome by set screws drawing the middle sleeve into tight contact with the body of the keratome. The adjustable plate in the keratome is attached to the inner sleeve.

Abstract: An improved dial bore gage having an adjustment mechanism associated therewith for adjusting the relative axial positions of the probe and dial portions of the gage, the adjustment mechanism including a first member operatively connected to the dial portion of the gage having a first threaded portion associated therewith of a predetermined thread pitch, a second member operatively connected to the probe portion of the gage having a second threaded portion associated therewith of a different predetermined thread pitch, and an adjustment member rotatably mounted to the first and second members, the adjustment member having spaced threaded portions to correspond to and mate with the threaded portions on the first and second members whereby rotation of the adjustment member will produce relative axial movement between the first and second members and this in turn will produce changes in the gage setting for each position thereof.