DE216974C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JVl 216974 - CLASS 42 δ. GROUP

Measuring instrument for clear and full widths. Patented in the German Empire on March 28, 1909.

The present invention is a measuring device, which is used to clear and full To measure widths, and has the advantage that it is suitable for dimensions of relatively large difference can be used at the same time, but otherwise the handiness and collapsibility of others Maintains dimensions at least to an undiminished extent. The device consists essentially from a scale in conjunction with a series of balls which by their different position, which depends on the circumference or diameter to be measured aligns, adjust the dimensions.

When applying the invention to a tool for measuring the clear width of holes, a volumetric flask of considerably smaller diameter than the hole is used, while a series of balls is arranged in the annular space between the volumetric flask and the inner surface of the opening to be measured. For example, if a hole of 2Y ₄ "diameter to be measured, there is a degree expedient of a Maßpflock of _^3/4" diameter and a series of balls of _^8/4 "diameter and by using the everywhere readily available normal spheres, an accurate measurement can be achieved without difficulty.
The use of one of the common block

measurements requires considerable practice to carry out the measurement correctly while

in the case of a small block with the balls according to the invention, the handling during insertion of the block measure is so simple, and the measure is so handy that the measurement of a hole without any practice with the greatest Speed can be achieved.

The measurement of an outside width through the use of balls, which · in a Annular space 'are inserted between the hollow measure and the object to be measured, can go on in just as easily.

The main advantage of the present invention is that a single standard size of the rule can be used to measure a large number of different hole sizes, since the annulus can be of such a size that it can easily be supplemented by the standard diameters of the balls currently available. For example, with a measure _^3/4 "diameter and annular chambers which with balls of V _8" to be filled up to six tenths up to one inch, all variables are / ₄ "as measured from one inch to 2 ³ increasing by eighths exactly. For reasons of cheapness and lightness, the larger spherical dimensions can be omitted and two or more spheres placed on top of one another in a direct radial line fill every required annular space and thus every desired diameter

Claims (3)

reach. The measuring peg, which one in the middle lies between the balls is beveled up to a certain length, whereupon the Diameter can be read depending on the depth to which the oblique stake is guided downwards between the balls. The object of the invention is illustrated in the accompanying drawings in two embodiments, namely represents ίο Fig. ι in section a dimension according to the present Invention, which is to be used for hole measurements while Fig. 2 shows a similar view of a measure for external measurements. In the arrangement of FIG. 1, the measuring peg a used in the middle is beveled at the lower end. With this inclined surface he comes into contact with the row of balls b (expediently three in number), which between ao of the inclined surface and the walls of the hole c is in order to indicate the dimension by their distance from one another. The larger the hole, the more the balls will penetrate the outside, and the deeper the measuring stake will penetrate, so that the hole width can easily be read from the position of the measuring stake on a scale attached to it. Of course, the actual scale α does not necessarily have to be a cylindrical or beveled round peg, but it can be any other correctable shape, for example. a ball, screw, or any other device may be used. From the center of such a measuring instrument from two or more radially extending in one plane . Lines single balls or a series of such balls can be inserted. The balls b are held in their correct position by a ball cage d , the upper part of which also serves as a guide for the rod dimension a and within which the balls b are held loosely. As mentioned, the latter can either approach one another or further apart, depending on the measured width. The ball holder d is made smaller in outer diameter than the hole c to be measured, so that it can be inserted without difficulty and when the measure is withdrawn. the balls b can move closer together towards the middle and thus easily penetrate the hole. Since the balls can rotate freely, even if a considerable force is used to constrain the scale, the retraction of the scale can be carried out comfortably, whereas in previous practice the retraction had to be done by hammering or pressing. It is easy to see that by using such a measure in place of the previous type of measurement with a single instrument, a large number of different diameters can be measured. Comes z. B. 2 "of the scale, a diameter difference of V _4", so can thus holes are measured, the range between i _^3/8 and i _^5/8, while the center position iV ₂ "and the balls used Y _2" have diameters. The upper parallel part of the dimension peg α is divided into 16 parts in a distance corresponding to the length of the beveled part, each of which represents V ₁₆ "within the dimensional limit of ιY ₈ to ιY ₅ "; of course, any other bevel can be made on the stake, for example 1 "length can take V ₁₀₀ " bevel, and if the stake is 1 "long it can be divided into tenths so that each of these tenths can be V ₁₀₀₀ " in diameter of the hole to be measured. In Fig. 2 an analogous application of the same invention to the measurement of outside diameters is illustrated, only that in this case the ball holder d is designed hollow or cap-like to accommodate the rod to be measured or the like. Between them, and with the scale bar g made of one piece or fixedly attached to the same. The inclined, in this case hollow measuring element a ¹ is constructed in the manner of a cap or a cylinder open at the bottom and has two downwardly directed inner inclined surfaces β ² ', which limit the external movement of the balls b , and an extension a ³ on its closed end , which provides a guide and at the same time the pointer for the scale bar g. If a row of balls is damaged in the course of time, it can easily be replaced by new ones Balls are replaced, as is the scale. On the other hand, however, the ease of use the degree of wear and tear of the instrument to the extent customary up to now can be excluded. In order to achieve the longest possible measure, several rows of balls can be placed in the Annular spaces may be provided. The instrument can also measure the distance between two Points are used by extending arms from the scale in the radial direction, which are directed in opposite directions and similarly provided with balls at their ends are, so that there is also a spreading apart due to the downward movement of the dipstick he follows. Patent-A ν Proverbs: i. Measuring instrument for clear and full widths, characterized in that the Probe body for determining the widths to be measured consists of a row of spheres, which is supported by a wedge-shaped measuring body is spread apart, so that the balls by the width of their spread apart by means of the different relative positions of the scale achieved thereby Show measure. 2. Hole button according to claim i, characterized in that the measuring instrument consists of a sleeve body consists of a laterally protruding at the lower edge Ball ring carries while in the bore of the sleeve a to a certain distance in the same Angle beveled scale is movable downwards, its height position in relation to on the upper edge of the case on a scale indicating the width found. 3. A device for measuring the outer diameter of bodies of all kinds according to claim i, characterized in that a cylinder sleeve open at the bottom is provided on the inside with inclined surfaces which form the guide surfaces for the probe balls held in a die body, which inwardly with the outer diameters of the piece to be measured come into contact and, through their position on the wedge surfaces (a ² ), adjust a scale (g) that can be moved up and down in the bore of the sleeve, the height of which indicates the outside width on a scale. . 1 sheet of drawings.