US1361156A - Micrometer-caliper - Google Patents

Description

' F. 0. JAQUES, sR.

MICROMETER CALIPER.

APPLICATION FILED SEPT. 6. 1919.

1 361 156 Paten ted Dec. 7, 1920.

' Yaw ATTDENEY:

UNITED STATES PgrENT OFFICE.

FERNANDO OSCAR JAQUES, 33., OF PROVIDENCE, RHGIDE ISLAND, ASSIGNOR TO FERNANDO OSCAR JAQUES, JR., OF PROVIDENCE, RHODE ISLAND.

MIGROMETER-CALIPER.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application filed September a, 1919. Serial No. 322,126.

To all whom it may concern.

Be it known that I, Fnnnanno OSCAR JAQUES, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in idicrometer-Calipers, of which the following is a specification.

My invention has reference to an improvement in instruments of precision and more particularly to an improvement in that form of micrometer calipers known as easy reading micrometers.

In easy reading micrometer calipers it is essential that the numerals which give the reading, be as large as possible and that the number of movable parts he reduced to a minimum, so as to reduce friction in turning the spindle. Such micrometers as heretofore constructed, usually have too many movable parts operated from the spindle and which create so much friction, that the spindle cannot be turned with the delicate sense of touch required.

The object of my invention is to improve the construction of an easy reading micrometer caliper, whereby the figures are of a sir .e that can be easily seen, the construction simplified, the number of parts greatly reduced and the friction of said parts reduced to a minimum.

l d y invention consists in the peculiar and novel construction of a micrometer caliper having a measuring indicating mechanism operated from the spindle, said measuring indicating mechanism giving the measurement by numerals on a hand through a sight opening in the handle and having details of construction, as will be more fully set forth hereinafter and claimed.

Figure 1 is a side view of my easy readingmicrometer caliper. 7 v Y r Fig. 2 is an enlarged detail view of the sight opening in the micrometer caliper.

F 3 is an enlarged detail sectional view showing the easy reading mechanism in the handle of the caliper. I,

Fig. 4; is an enlarged face view of the gearing showing its connection with the spindle of the caliper, and I Fig. 5 is an enlarged edge view of the thin metal band on which are the numerals and showing its operative connection with the spindle of the caliper.

In the drawing 6 indicates the approxiat one end into a pin gear 26.

mately U shaped handle, 7 the barrel, '8 the thimble,9 the spindle and 10 my improved measuring indicating mechanism of a micrometer caliper.

The handle 6 has a cavity 11 for the indicat ngmechanism 1O closed by a plate 12 which is held in place by recessing the barrel end of the plate into the barrel and a screw 13 which screws into the handle as shown n Fig. 3. The spindle portion of the cav- 1ty 11 is closed by a fitting 14 secured tof the handle 6 by a screw and having a hole through which the spindle 9 extends. The barrel 7 and the thimble 8 have the usual construction. The spindle 9 has the usual forty pitch screw-threads, not shown, screwthreaded through the inner end portion of the barrel, not shown, and has in addition, a longitudinal groove 15. A gear 16 on the spindle 9 has a tongue 19 in the groove 15. The gear 16 meshes with a gear 17 which in turn meshes with a gear 18, all of the " cars 16, 17 and 18 having the same pitch.

he gear 17 is secured to a shaft 20 which revolves in bearings 21.21 in the handle 6 and plate 12 and the gear 18 is secured to a shaft 22 which revolves in bearings 23.23 in the handle 6 and plate 12. A roll 24 has a sliding fit on the spindle 9 and a tongue 25 in the groove 15 andis formed The roll and pin gear rotates with the spindle but is held from longitudinal movement by the handle 6 and fitting l-i. A thin metal band 27 has a series of pin holes 28 28 extending longitudinally and which coincide with and through which the pins on the pin gear 26 extend and engage with the band, to move the band, thereby positively connecting the band with the pin gear. One end 29 of the. band is secured to the shaft 20 and the other end '30 of the band is secured to the'shaft 22 in 'any'well known way, the ends of the band coiling loosely around the shafts, as shown in Fig. 5. The band 27 has numerals on its face, as shown in Fig. 3, indicating units of measurement, said numerals in a one inch micrometer caliper reading from 0 to 999, and these numerals extend nearly the length of the band.

In the operation of my improved micrometer caliper the spindle may be turned in either direction. In revolving the spindle 9 to the left, the gears 16, 17 and 18 will revolve in the direction of the arrows, as

shown in Fig. 4, thereby winding up the end 29 of the band 27 on the shaft 20 and unwinding the end 30 of the band 27 from the shaft 22. As the ends of the band are loosely wound on the shafts the differencein the diameters of the coils, when one end is wound up and the.other end unwound, is compensated for. With the reading at zero, one complete turn of the spindle 9, roll 24 and pin gear 26, to the left, will move the band 27 to bring up the figure 25 so that the same will be seen through a sight opening 31 in the fitting 14. The reading would then be twenty-five one-thousandths of an inch. After the spindle has been revolved thirteen complete turns to the left, the reading would be, three hundred and twenty-five one thousandths of an inch, as shown in Figs. 1 and 2. By the peculiar and novel construction of my improved easy reading micrometer caliper, the numerals on the band are sufficiently large so as tobe easily seen through the sight opening and by increasing the size of the roll 24F. may be made larger, if desired, the construction of the operating mechanism greatly simplified, and friction in the indicating mechanism reduced to a minimum.

Having thus described my invention I claim as new 1. A micrometer caliper comprising a handle, a spindle through the handle, a roll on the spindle, a thin metal band over the roll, means for operati vely connecting the roll with the-spindle, means for operatively connecting the band with the roll, means on the band for indicating units of measurement and means for operatively connecting the ends of the band with the spindle, for coiling up and uncoiling the ends of the band, in rotating the spindle.

. 2. A micrometer caliper comprising a handle, a spindle through the handle, a roll on the spindle, a thin metal band over the roll, means for operatively connecting the roll with the spindle, means for operatively connecting the band with the roll, means on the band. for indicating units of measurement, shafts rotatahly secured in bearings, one end of the band being secured to .one shaft and the other end of the band being secured to the other shaft, and means-operatively connecting the shafts with the spindle, whereby on rotating the spindle the ends of the band will coil up on one shaft and uncoil from the other shaft.

3. A micrometer caliper comprisng a handle, a sight opening in the handle, a spindle through the handle, a roll on the spindle, a thin metal band over the roll, means for operatively connecting the roll with the spin dle, means for operatively connecting the band with the roll, means on the band for indicating units of measurement through the sight opening, two shafts rotatably secured in bearings, one end of the band being secured to one shaft, and the other end of the band being secured to the other shaft, and gears operatively connecting the shafts with the spindle, whereby on rotating the spindle the ends of the band will coil up on one shaft and uncoil from the other shaft.

4. A micrometer caliper comprising a handle having a sight opening and a cavity, a plate over the cavity, a spindle through the handle, a roll and pin gear on the spindle, a thin metal band over the roll and operatively connected with the pin gear, means for operatively connecting the roll and pin gear with the spindle, means on the band for indicating units of measurement through the sight opening, two shafts in the cavity and rotatably secured in bearings in the handle and plate, one end of the band being secured to one shaft and the other end of the band being secured to the other shaft, and gears on the shafts and spindle operatively connecting the shafts with the spindle, whereby on rotating the spindle, the ends of the band will coil up on one sh aft and uncoil from the other shaft, and units of measurement will show in succession through the sight opening.

5. A micrometer caliper comprising a handle having a sight opening and a cavity, a plate over the cavity, a spindle through the handle and having a longitudinal groove, a fitting over the cavity and spindle, a roll on the spindle and having a tongue in the groove in the spindle, a pin gear on the spindle and having a tongue in the spindle groove, a thin metal band over the roll and pin gear and having pin holes through which the pins on the pin gear extend, means on the band for indicating units of measurement through the sight opening, two shafts in the cavity and rotatably secured in bearings in the handle and plate, one end of the band being loosely coiled around and secured to one shaft and the other end of the band being loosely coiled around and secured to the other shaft, gears on the shafts meshing together, a gear on the spindle having a tongue in the spindle groove and meshing with one of the shaft gears, whereby on rotating the spindle, the ends of the band will loosely coil up on one shaft and loosely uncoil from the other shaft and units of measurement will show in succession through the sight opening.

In testimony whereof, I have signed my name to this specification.

, FERNANDO OSCAR JAQUES, SR.

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