US1571783A

US1571783A - Adjustable gauge

Info

Publication number: US1571783A
Application number: US9001A
Authority: US
Inventors: Aulenback James Roy
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-02-13
Filing date: 1925-02-13
Publication date: 1926-02-02
Anticipated expiration: 1943-02-02

Description

'Feb. 2 1926. r

J. R. AULENBACK ADJUSTABLE GAUGE Filed Feb. 13, 1925 zsneets-sheet 1 WITNESS- Feb. 2,1926. 1,571,783

J. R. AULENBACK ADJUSTABLE GAUGE Filed Feb. 15. 1925 2 Sheets-Sheet '2 Patented Feb. 2, 1926.

Q NITED STAT JAMES ROY AULENBACK, 0F WORCESTER, MASSACHUSETTS.

ADJUSTABLE GAUGE.

Application filed February 1 0 all fur/mm it may concern;

Be it known'that 1, Ja me ROY AULEN- men, a subject of the King of Great Britain, residing at .lVorcester, in the county of lVorcester and State of Massachusetts, have invented new and useful Improvementsin Adjustable Gauges,- of which the following is a specification.

This invention relates to adjustable gauges and its principal'object is to provide a gauge which can be readily and quickly adjusted to holes of different diameters to ascertain the diameterv of the hole.

A further object of the invention is to pro vide a device for measuring or ascertaining the diameter of openings which consist of a series of longitudinally adjustable blades to engage the walls of the hole which after being adjusted to the walls of the hole will be positively locked in such position so that an accurate reading will be had.

'The invention also'contemplates an ad justable tool which can be readily set at a predetermined measurement to gauge finished tools and thereby ascertain whether or not the same are of the correct measurement.

lVith the preceding and other objects and advantages in view, the invention consists in the novel combination of elements, arrangement of parts and operations to be hereinafter specifically referred to, illustrated in the accompanying drawings and pointed out in the appended claims.

In the drawings:

Figure 1 is a side elevation of a gauge embodying my invention.

Figure 2 is a longitudinal sectional view of the same.

Figure 3 is a sectional View taken on line 3-3 of Figure 2.

Figure 4 is a sectional view taken on line tt of Figure 2.

Figure 5 is a perspective of one of the blades embodying the invention.

Figure 6 is an elevation of a modified embodiment of the invention.

Figure 7 is a longitudinal sectional view of the same.

Figure 8 is a perspective of one of the blades used in the modified embodiment of the invention.

Figure 9 is a sectional view taken on line 9-9 of Figure 7, and Figure 10 is an end elevation of the device.

Referring to the drawing in detail, and particularly to Figures 1 to 5 inclusive, the

13, 1925. Serial No. 9,001.

numeral 5 designates a shank having one end tapered from a point intermediate its ends to its outer end and provided with a plurality of grooves 7 which diverge to the wider or outer end of the tapered part. This shank 5 is formed with a continuous bore which is of increased diameter from a point intermediate its ends to its inner end. This bore is designated generally at 10 and the wider end thereof is indicated at 11. A longitudinally adjustable rod 12 extends through the bore and has its inner end threaded as at 13 and engaged with a longitudinally movable nut 14 which is received in the part 11 of the bore 10. An expansible coil spring 15 encircles the part 10 and has one end positionedagainst the nut 14 and its other end bearing against the shoulder afforded by the forn'iation of the bore.

- A head 16 is formed upon the outer end of the rod 9 and has its inner end bevelled as at 17. Longitudinally movable in the groove 6 is a plurality of blades 18 having their inner faces inclined in the same direction as the faces of the groove 6. The forward ends of these blades are provided with notches, the inner walls of which are bevelled in the same plane as the bevelled edge 17 on the head 16 so that the bevel face 17 will interlock with the notches. The opposite ends of the blades are bevelled as at 19 and are engaged by the bevelled inner end of an adjusting sleeve 20 threaded on the threaded surface 21 of the shank 5. A thimble 22 is received on the threaded sleeve 20 and the shank 5 and is locked thereto by diametrically opposite pins 23 extending from the sleeve 20 and engaged in openings 24 in the thimble.

In the use of the invention disclosed in Figures 1 to 5, the thimble 22 is rotated to move the sleeve 20 toward the outer end of the shank and the contacting of the beveled end of the sleeve 20 with the beveled ends 19 of the blades 18 will move the same longitudinally intheir grooves, until the outer edges of these shanks contact the walls of an opening whose diameter is to be ascertained. With the device thus operating, the spring 15 normally moves the rod 10 in a direction causing the

bevelled surfaces

17 and 19 to interlock, which will hold the blades in the adjusted position.

In the form of the invention shown in Figures 6 to 10, the rod and spring are eliminated. In lieu of these parts, I employ a head having a central opening it. A. locking plate 27 is positioned against this head and is formed with a screv. or threaded shank 28 which passes through this opening 26 and is received in an internally threaded bore provided in the shank 5. In this form of the inventiomthe blades are provided with serrations or teeth 30 and the thimble 92 is provided with graduations 31 to indicate the adjustment of the device.

In this embodiment of the invention, the device is used for the purpose of measuring tools which is to ascertain whether or not they are of the correct diameter whereas the device shown in Figures 1 to 5 is used to ascertain the diameter of an openin lVhile I have shown and described the preferred embodiment of the invention, I desire to have it understood that such changes may be made in the form, construction and arrangement of parts, and operations as will not depart from the spirit of the invention or the scope of the subjoincd claims.

What is claimed is:

1. An adjustable gauge comprising a shank, having one end tapered from a point intermediate its ends to its outer end and further provided with grooves extending longitudinally of the shank and inclined to the axis thereof, a series of blades adjustable in the grooves and having notches at their outer ends, adjusting elements threaded on the shank and having one end bearing against the inner ends of the blades, a longitudinally movable rod slidably carried by the shank, a head carried thereby and engaging the outer ends of the blades and an expansible coil spring normally urging the rod in a direction to cause the head to engage the blades.

2. A device of the character described comprising a hollow shank, a frusto conical member formed therewith and having a se ries of grooves extending longitudinally oi the shank and inclined to the axis thereof, a threaded sleeve on the shank, a series of blades adjustable in the grooves and having notches in their outer ends, a head, a shank formed with the head passing through the frusto conical member and hollow shank and capable of longitudinal movement there in, said head having inclined surfaces on its inner face and engaged in the notches, and an expansible coil spring encircling the shank, and a nut on the shank and received in the hollow shank and with which one end of the coil spring engages.

In testimony whereof I aflix my signature.

JAMES R. AULENBACK.