US926688A - Measure. - Google Patents

Description

J. R. CARROLL.

MEASURE.

APPLIOATION IILEI) JAN. 10, 1907 Patented June 29, 1909.

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JOHN REID CARROLL, OF WEST HOBOKEN, NEW JERSEY.

MEASURE Specification of Letters Patent.

Patented June 29, 1909.

Application filed January 10, 1907. Serial No. 351,675.

To all whom it may concern:

Be it known that I, J onN Rum CARROLL, a citizen of the United States, residing in West Hoboken, Hudson county, State of New Jersey, have invented a new and us"- t'ul Improvement in Measuring Instruments; and I do hereby declare the following to be a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the utilization of a circle and a series of arcs of concentric annuli as an accurate and instantaneous means of obtaining dimensional measurements.

The novel construction of my invention enables minute measurements to be readily obtained, and to still further enhance its usefulness in this respect a series of steps may be cut along the outer edges of the camshaped plate, as hereafter fully specified.

I am aware that a patent was issued on October 13, 1903, No. 741,146, for a gage containing similar steps to mine, the two sides of the tool containing similar serrations, as a means of measuring, but I am not aware that the combination of a series of" steps with a circular base have been used together.

Another object of my invention is to make a gage capable of producing any required measure on all devices and implements in which accurate adjustments are necessary.

To the ends and objects mentioned my invention consists of certain devices, combinations of parts and features oi construction, all of which will be hereafter l'ully described and particularly pointed out in the concluding claims.

In the drawings forming part of this specification, Figure 1 is a geometrical plan of my invention, showing the circle, the portions of arcs of concentric annuli and the steps, and obtaining the interior and exterior dimensions of two cylindrical objects. Fig. 2 is an end view of Fig. 1, the cylinder Y being removed. Fig. 3 shows the two stepped sides of the measure with the superfluous intermediate part removed, and the two sides pivoted together at the center a. Fig. 4 is an edge view of Fig. 3. Fig. 5 is a erspective view of a sliding linger or aving ste s on one end to engage with the steps of t e measure.

Fig. 6 is another form of sliding linger having one end made to engage with steps of the measure. Figs. 7 and 8 show the gage as it is used in setting ilinger or sliding gage on devices whore "dimcnsions are required. Fig. 9 is an edge view of the gage as seen in the position of the shadow I) 1), showing the means of pivotal fastening.

As shown in the drawing (Fig. 1) a series of arcs of concentric rings project on a camshaped plate, from one complete center circlc, the complete circle forming the base of the instrument and being cut out all around its circumference, with the exception of the portion from which the plate projects, the whole forming a cam having its lateral edges in the general form of spiral-like curves. Along the edges and between each two adjacent arcs an angular step may be formed, one side of the angle being formed by a portion of a certain radial line of the center circle a, extending from one are to the next adjacent one. The other side of the angle being formed by a portion of the adjacent one of the arcs. This repeated between each two adjacent arcs. in practice these steps may be made right angles, the curved graduation mark being a continuation of the are side of the angle.

To obtain a measurement with this gage it is necessary to understand the peculiar relation of the circular base (1 to the various steps I) and I). In Fig. 1 the various broken lines are numbered respectively d and d; another line is nun'ibcrcd 1, 2 and 3 along its length. In measuring the inside diameter of a hollow circle it will be observed (Fig. 1) that the gage is inserted inside the cylinder Y with the circle a touching one side of the inner part of the tube. Zero is not, as might be supposed, in the center of (1 but at its circumlerencc.

1, 2 and 3 represent various dimensions on the gage. Zero from 3 is a point on the circumference of a indicated by 1 when using the 6 side of the measure. For example, suppose a to be thrcc-cighths of an inch in diameter, and the various steps one-sixteenth of an inch in height. From the point on (1-, indicated by the broken line, to the step 3 would be:-Diametor of (1 1 1 steps 1?,- ins. In the measurement of the cylinder Z, (1-, being on the outside of the cyliinler, it is not included in the measurement, therefore from a to b is 23 steps, 1, ins. Therefore from 1 in determining dimensions or a minute materiai.

re measure, takto 2 is 8 steps, 3,- inch. The cylinder Y, on the other hand, having a on the inside, is 10 steps: 1 inch. So the broken line, (Z measures 30 steps 2% inches, but on the same broken line, on the 6 side, a being omitted, the dimension would be 1 inch, and to (Z from a, 2 inches. The having inches marked on both sides the foregoing Will explain the difference between these fig ures on the I) and 5 sides of the ga 'e. The numerals on the Z) side include the diameter of a, the numbers on the 6 side omit this di ameter.

In gages of a larger size than that shown the steps n Kt to a might interfere With direct alinement from the radial side of a distant step through the center of a to its circumference. The circle a can be enlarged in proportion to the size of the measure, shown by the broken line ring surrounding a, of course increasing its diametral value.

In Fi 3 shown a preferable form of using the measure. In this figure the measure is shown with the superfluous intermeeiate part eliminated, and the two sides Z) and 6 made of two separate pieces, the two circular bases (1 being pivotally joined, so that either side of the may be used independently. The pivot fastening may be made in any of the regular forms, such as shown in Fig. a, or other suitable method.

In fractional measurements confusion might be caused in measuring with this gage, owing to the curved outline. To assist the every eral construction of my measuring gage and t line I its accompanyingparts i 112.] haatn'g; gltEE (ll-kiss .53: rank v tiles: in

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ssiiianliy innin- 151i} are as in ite iaiil l ore x at vhis a; ,rnadna when u narci ls s J Li her ssirrlize al Bong; int liner anthl L 1 J 2) djacent to the opposite point on. said. ob-

, the indicating numerals Will give cordiameters, substantially as specified.

In a measuring instrument a flat plate ing its lateral edges in the general form 1 5 piral-like curves, the side of the plate .g provided With a series of graduation ks, suitably numbered to denote their ensional relation to each other or to or end of the plate and having a seriesof 39 6a any one of the steps of the sliding gage. These gages are generally sustained by a set screw or similar means when rigidity is required. The slide moving on a track or similar device on the measuring gage.

On the sliding finger c the steps g out so that the sides of the steps fit closely to the radials distant from a about tWo inches. The steps will engage at any distance farther than tWo inches from a, because, the larger the rings forming the arcs become and the portion of the are forming the step becoming a smaller fraction of the ring, the radials approach more and more to paralleling each other as they recede from (1, therefore they will engage close enough for practical purposes in all cases except When required to engage With the steps nearest to (1 and in this case the center step on the sliding finger will always engage With the required step of the measure. The radial side of the measure side of the step offering the desired resistance when the radials from one are to the next one N M.-- .MNWMA 'i'y UULi vurrti actor u/ series v need not necessarily engage closely, the arc.

of equal height to the steps on "the sliding may be made on the surl ace of tl as shown in 3 (1)). mg the same :emhlrinrchruu' 2030385 that ln this drawing dimensions as in Fig. 1, i is ravxn toreach the iirs .llifiwlissiar KtgiEiWiT-li'sVOIlE ill I nsessnreiironi t,.assstmeunn.

.re plirreli Alia; ;l :t anmg; tiniest stinntrn tr stand in swl su ts Elgigss. i Zen ssinii n ggay e .tnuttirgg thee xrdlnarjr sseiele psneerflilyz .neellon the t slur y and; .g'ufdnls nvmnl' gilxilijm am-3wmm"?i Warmly 6), having an extension with a step or a series or a of steps on one end is designed to engage with set the steps of the measure. In Fig. 7 the steps rect g on c is a better form than the single step, 2. q, in Fig. 8, though either may be used, since hav; the series of steps (1 give a steadier resistance of s Where pressure may be required. By movbein ing the measure Z) step by step in the direcmar tion I) b as the curved arrow shows, the finger dim can be brought in contact with any series oreith curved longitudinal lines paralleling the curved outline of the plate, these being crossed at intervals by portions of the concentric annuli, so that the instrument when placed inside a hollow object or outside any object and one of the graduation marks being brought in line with or adjacent to one end of the object to be measured, the indicating numbers will give correct diameters, substantially as specified.

3. In a measuring instrument a fiat plate having its lateral edges in the general form of spiral-like curves, the side of the plate adjacent such edges being provided with a series of graduation marks, suitably numbered to denote their dimensional relation to each other or to either end of the plate, having at one end a complete circle from which the cam-shaped plate projects, and having a series of curved longitudinal lines paralleling the curved outline of the plate, these being crossed at intervals by portions of the concentric annuli, substantially as specified.

4. In a measuring instrument a flat plate having its lateral edges in the general form of spiral-like curves, the side of the plate being provided with a series of graduation marks suitably numbered to denote their dimensional relation to each other or to either end of the plate, having at one end a complete circle from which the cam-shaped plate projects, the complete circle having a hole through its center to permit of pivotal sustainment, and having a series of curved longitudinal lines paralleling the curved outline of the plate, these being crossed at intervals by portions of the concentric annuli, substantially as specified.

5. In a measuring instrument a flat plate having its lateral edges in the general form of spiral-like curves, the side of the plate being provided with a series of graduation marks suitably numbered to denote their dimensional relation to each other or to either end of the plate, having at one end a complete circle, from which the cam-shaped plate pro j ects, the circle having a hole through its contcr to permit of pivotal sustainment, and having a series of curved longitudinal lines paralleling the curved outline of the plate, these being crossed at intervals by portions of the concentric annuli, each are having between it and the next one adjoining an angular step, substantially as specified.

6. In a measuring instrument a fiat plate having its lateral edges in the general form of spiral-like curves, the side of the plate being provided with a series of graduation marks suitably numbered to denote their dimensional relation to each other or to either end of the plate, having at one end a complete circle from which the cam-sha ed plate projects, the circle having a ho e through its center to permit of pivotal sustainment, and having a series of curved longitudinal lines paralleling the curved outline of the plate, these being crossed at intervals by portions of the concentric annuli, each are having between it and the next one adjoining, along the curved edge of the plate, an angular step, in combination with a sliding gage having one end made to engage with the angular serrations on the cam-shaped measuring instrument, substantially as specified.

7. In a measuring instrument a flat plate having its lateral edges in the general form of spiral-like curves, the side of the plate being provided With a series of graduation marks suitably numbered to denote their dimensional relation to each other or to either end of the plate, having at one end a complete circle, from which the cam-shaped plate proj ects, the circle having a hole through its center to permit of pivotal sustainment, and having a series of curved longitudinal lines paralleling the curved outline of the plate, these being crossed at intervals by portions of the concentric annuli, each are having between it and the next one adj acent, an angular step, in combination with a sliding finger or gage having one end made to engage with the angular serrations on the side of the measuring instrument, and means of )ivot ally and adjustably sustaining the s iding and measuring instrument in combination, substantially as specified.

In testimony whereof I have hereunto set my hand this 4th day of January, 1907 in the presence of two attesting witnesses.

JOHN REID CARROLL.

Witnesses:

JOHN T. BROSNAN, EDWARD A. BYRNE.

Corrections in Letters Patent No. 926,688.

It is hereby certified that in Letters Patent No. 926,688, granted June 29, 1909, upon the application of John Reid Carroll, of West Hoboken, New Jersey, for an improvement in Measures, errors appear in the printed specification requiring correction, as follows: Page 1, line 51, the reference-letter a should read a; line 110, the reference-letter b should read I, and same line the number 1 should read 1 page 2, line 66, the words of the sliding gage should be stricken out, and the words on the measuring gage be inserted instead; line 70, the words on the measuring gage should be stricken out; line 78, the period should be stricken out and a comma inserted, and line 7st, the word The should commence with a small t, thus making a continuous sentence; and that the proper corrections have been made in the files and records of the Patent Ofiice, and are hereby made in said Letters Patent.

Signed and sealed this 24th day of August, A. D., 1909.

[SEAL] F. A. TENNANT,

Acting Commissioner of Patents.

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