US925500A - Adjustable bit. - Google Patents

Description

G. `H'.' PAULUs. ADJUSTABLE BIT.

APPLIOATIONIILBD 311113,30, 190B.

Patented June 22, 1909.

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ADJUSTABLE BIT LPPLIOAIION FILED .Imm so, 190s.

l @www GEORGE H. PAULUS, OF STEUBENVILLE, OHIO.

ADJUSTABLE ABIT.l

Specification of Letters Patent.

Application filed June 30, 1908.

Patented `Tune 22,1909,

sei-iai No. 441,155.

To all 'whom 'it may concern:

Be it known that 1, GEORGE H. PAULUs, a citizen of the United States, residing at Steubenville, in the county of Jefferson and State of Ohio, have invented certain new and useful Improvements in iadjustable Bits, of which the following is a speci'cation.

This invention relates to augers or bits of the type embodying an adjustable cutter whereby the tool may be adjusted to facilitate boring of holes or openings of different sizes.

The essential feature of the invention resides in the eculiar construction of the tool, and especia y in the means employed for adj usting the cutter.

For a full understanding` of the invention, reference is to be had to the following detail description and to the accompanying drawings, in which- Figure 1 is a side elevation of a tool embodying the invention; Fig. 2 is a vertical sectional view; Fig. 3 is a view similar to Fig. 2, the section being taken at a right angle thereto, however Fig. 4 is a transverse section on the line x-:c of Fig. 3; Fig. 5 is a section on the line y-#y of Fig. 3, and Fig. 6 is a section on the line z--z of Fig. 3; Fig. 7 is a perspective view of the body of the bit; Fig. 8 is a detail view of the member separating the sleeves; Fig. 9 is a detail view of the wedge, and Fig. 10 is a side elevation of the adjustable cutter.

Throughout the following description and on the several figures of the drawings similar parts are referred to by like reference characters.

Specifically describing the invention as illustrated in the drawings, the numeral 1 designates the shank of the tool and the numeral 2 the screw point at its lower end usually employed for centering the auger or bit preparatory to operating the same in the well known manner. Mounted upon the lower portion of the shank 1 is a cutter 3 which is adjustable transversely of the shank and being movable in guides 4. The upper' guide 4 is formed by a groove in the lower portion of a detachable plate 5 while the lower guide has a similar groove in the lower end of the shank 1, the upper and lower edges of the cutter 3 being received in the grooves as shown most clearly in the drawings.

The cutter 3 is provided with the usual cutting lip 6 and upon the inner side of said cutter are formed the teeth 7 which are provided at intervals nearly throughout the length of said cutter. The teeth 7 are in mesh with a pinion 8 on the lower end of a short shaft 9, the upper end of which is also provided with a pinion 10. The shaft?) is held in position by means of the detachable late 5, said plate and the shank of the too having suitable bearings permitting of free rotation of the shaft, and the upper pinion 10 is in mesh with teeth 11 formed upon the inner side of a sleeve 12 rotatably mounted u on the lower portion of the shank 1. It wi l be apparent that upon rotation of the sleeve 12, the shaft 9 will be actuated and the pinion 8 coperating with the teeth 7 will cause sliding movement of the adjustable cutter 3 in either direction, according to the direction of rotation of the 'sleeve 12 above referred to. The parts 8, 9, 10, and 12 are employed for actuating the adjustable cutter so as to vary the position of the cutter lip 6 relative to the point 2 and thereby increase or decrease the cutting radius of the tool in an obvious manner.

In order to hold the cutter 3 at a desired adjustment a wedge 13 is provided, said wedge having a stem 14 at the upper end of which is formed a semi-circular head 15. The curved side of the head 15 is screw threaded while the flat side thereof is arranged in contact with an adjacent flat side portion of the shank 1. Inclosing the head 15 of the wedge 13 is a second sleeve 16, which is internally screw threaded. The threads of the sleeve 16 engage those of the head 15 and the rotation of the sleeve will cause vertical or longitudinal movement of the head, similar movement being imparted to the wedge 13. The wedge 13 is formed with an outwardly and downwardly inclined side, and said wedge is received in a seat 17 formed in the lower end portion of the tool at the inner side of the adjustable cutter 3. The inner wall of the seat 17 is inclined to conform with the inclination of the adjacent side of the wedge 13, and the lower end of said seat inclines upwardly and outwardly as shown at 17a. rlhe outer side of the wedge 13 is formed with teeth 13a and the inner side of the cutter 3 is provided with the teeth 7 above described. The stem 14 of the wedge 13 extends upwardly through the sleeve 12 and into the space surrounded by the sleeve 16.

1t will be apparent that when it is desired to vary the cutting radius ofthe cutter 3 it is only necessary to rotate the sleeve 12 which actuates the shaft 9 and pinion 8. When the cutting lip 6 of the cutter 3 is suitably ad.- justed, the sleeve 16 is rotated so as to move the Wedge 13 upwardly, whereby the inclined face of the wedge riding in contact with the inclined wall of the seat 17 forces the wedge outwardly causing engagement of the teeth 13a with the teeth 7 of the cutter 3, the wedging coperation of the element 13 with the cutter 3 effectively holding the latter at the desired adjustment, the parts 3 and 13 interlocking in an evident manner. To dis-v engage the wedge 13 from the cutter 3 the sleeve 16 is rotated in the opposite direction and the wedge forced downwardly, the lower end of said wedge moving in contact with the lower end 17 a of the seat 17 and causing the wedge to move only slightly, but out of engagement with the cutter 3 so that the latter may be freely adjusted.

Having thus described the invention, what is claimed as new, is:

1.. In an expansion auger, the combina-- tion of a shank, a cutter slidably mounted thereon and rovided with teeth, a pinion in mesh with t e teeth of the cutter, a shaft carrying said pinion, a second pinion mount ed on the shaft, a sleeve mounted on the shank and having internal teeth meshing with the last mentioned pinion for rotation of the shaft to adjust the cutter, a Wedge mounted for longitudinal movement on the shank, a rotatable sleeve, and means connecting the last mentioned sleeve and wedge whereby the wedge may be moved into and out of engagement with the cutter.

2. In an expansion auger, the combination of a shank, an adjustable cutter movably mounted on the shank, sleeves rotatably mounted on the shank, connecting means between one of the sleeves and the cutter for actuating the latter, and means operable by the other of the sleeves for holding the cutter at a predetermined adjustment.

3. rlhe combination of a shank, a cutter transversely slidable thereon, and havingY a cutting lip, sleeves rotatably mounted on the shank, a shaft, pinions connecting said shaft with one of the sleeves and with the cutter, a longitudinally slidable wedge on the shank, a head connected with said wedge and slidable in the other sleeve, said last mentioned sleeve having a threaded connection with the head to actuate the wedge and cause the same to engage with or disengage from the cutter.

In testimony whereof I aiiix my signature in presence of two witnesses.

GEORGE H. PAULUS.

Witnesses:

JOSEPH GREENBnR-G, CHAs. STEIN.

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