US1388740A - Micrometer-caliper - Google Patents

Description

F. H. MILLER.

MlcRoMETEn CAMPER.

APPLICATION FILED OCT. l5. 1920.

1,388,740. I PatentedAug.23,1921.

2 SHEETS-SHEET I.

. L Frank H,MILIEF F. H. MILLER.

MICROMETER CALIPER'.

APPLICATION FILED OCT. l5, 1920.

1 ,388,740, Patented Aug. 23, 1921.-

2 SHEETS-SHEET 2.

MM W y %a of earner aerien y FRANK H. MILLER, OF MILWAUKEE, WSCONSIN.

MICROMETER-CALIPER.

Specicaton of Letters Patent.

1Eat-ented Aug. 23,1521.

Application led October 15, 1920. Serial No. le).A

tain new and useful Improvements in Micrometer-Calipers; `and I do hereby declare thatthe following is a full, clear, and exactV description thereof. I

My invention.Y has reference to an 1myprovement in micrometer calipers, and more particularly to calipers having or adapted to have measurement-indicating means reading to one thousandths of an inch more or less.

My object is to provide these improvements in such a manner that it may be read more easily and quickly than others of its class. To accomplish this, I have provided two sets of graduations, one on a rotating member which indicates the decimal fractionsthat is, one-fourth, one-eighth, onesixteenth, 0r smaller common subdivisions of an inch, and the other on a stationary member which indicates readings to one ten thousandths of an inch.

A further object of my invention is to provide a measuring device of the character described which is adapted to register exactly and without computation the common as well as decimal fractional parts of an inch. f

A further object of my invention is to provide an improved means for moving the work-engaging members of the tool into engagement with the Work.

In the accompanying drawings Figure 1 represents a longitudinal sectional view thereof, with a portion of the micrometer in elevation.`

Fig. 2 represents an elevation of the micrometer, showing the several graduations,

Fig. 3 is a plan view of the rotation thimble as extended in the flat, with the rows of numerals therein expressing different graduations,

Fig. 4 is an end view of the` rotating thimble showing the graduations thereon, and

Fig. 5 is a similar view of the stationary barrel, showing the graduations thereon.

Referring tothe drawings in detail, the

'numeral 1 designates the usual U-shaped frame, which is provided with the anvil 2, same forming the stationary member of the caliper.

The opposite end of the U-shaped member hastherein an internal threaded opening' in which is screwed the threaded shank 3 of the disk 1, same having arranged thereon the tubular sieeve5,-the free end of which is threaded internally and having screwed therein the member 6.

The member 3 is provided with a plurality of tapered fingers 7 which are adapted to bve wedged snugly against the lmeasuring end of the spindle S, which moves backand forth in the bore 9 of the disk and shank, by the .locking element 10. l

The sleeve 5 has movable thereon a second sleeve 11, the outer end of which is closed and has secured thereto the spindle 8, a portion of which is threaded, as at 12, and adapted to engage the threads of the bore within the member 6. The members 6 has extending outwardly therefrom a split sleeve 13 which is externally threaded and provided with the locking nut 14:. By this structure, compensation for wear is provided.

Secured to the disk L1 is a tube member 15 which is provided with a sight opening 16 as shown in Fig. 2.

f. TheV ends of both the sleeve 11 and the tube 15 are beveled and have thereon graduations, as shown in Figs. 4t and 5.

The sleeve 11 is provided with a milled exterior, as at 17.

Referring now to the scales or graduations upon the sleeve, l desire to call your attention .first to Fig. 8, and in this I haveshown the Asleeve 11 as being divided into fourths, eighths, sixteenths, thirty-seconds and sixtyfourths of an inch.

These graduations cooperate with the graduations on the end of the tube 15.

The graduations cnthe sleeve 5 indicate the thousandth part Aof an inch and coperate with the graduations on the end of the sleeve 11.

Thus, it will be apparent that as the sleeve 11 is rotated, the fractional part of an inch will be recorded by the graduations ofthe sleeve being brought into line with the zero mark on thel beveled edge of the tube 15, which is graduated in thousandths to indicate thevvariatiokns ofV the measurement of various settings. Also, by the coperation of the graduations on the sleeve 5 and the endV of the sleeve 11, the thousandths and decimals in various numbers are indicated. For instance, should the user desire to set the micrometer to ths of an inch, the sleeve ll is rotated until the numeral 5 on the 64th line registers With the Zero mark upon the beveled edge or the tube l5.

F rom the foregoing, it is thought that the constructiom operation and many advantages of the invention described herein, will be apparent to those skilled in the art, Without further description. lt is to be understood that various changes in the details of construction may be resorted to Without departing from the spirit or sacrioing any of the advantages of the invention.

Having thus fully described my invention, what l claim as new, and desire to secure by Letters Patent, is y l. micrometer caliper comprising a U- frame, a sleeve fixed in one end of said frame, a second sleeve spaced from and inclosing the irst sleeve and having an opening therein, a third sleeve movable between the first two and having a measuring spindle fixed thereto, there being graduations upon the irst and third sleeves coperating With graduations upon the third and second sleeve, the graduationsvon the first sleeve being visible through the opening in the seeond sleeve.

2. A micrometer caliper comprising a U- frame, a pair of spaced sleeves, one Within the other secured to one end o1 the frame, there being an opening in the outer sleeve, a sleeve movable between the tivo and having secured thereto a measuring spindle, said sleeve having graduations from fourths to sixty-fourths ot an inch adapted to coperate with graduations in the `inner and outer sleeve, there being graduations of one thousandths of an inch on the inner sleeve and eooperating with graduations on the movable sleeve, the graduations on the sleeves being visible through the opening in the outer sleeve. n

In testimony that I'elaim the foregoing I have hereunto set my vhand at Milwaukee,

in the county of vMilwaukee and State of lVisconsin.

FRANK H. MILLER.

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