US36573A - Improved machine for boring hubs - Google Patents

Description

G. T. PEARSALL & SQA. GARRISON. MACHINE FOR BORING HUBS.

No. 36,573. Patented Sept. 30, 1.862.

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tion of a portion ofthe some, taken in theline of the standards of the frame A and into B, as

UNITED STATES PATENT OFFICE.

G. T. PEARSALL, OF APALAGHIN, AND S. A. GAR-RISON, OF UNlON, NEW YORK.

IMPROVED MACHINE FOR BORING HUBS.

To all whom it may concern.-

Be it known that we, G. T. 'PEARsALL, of Apalachin, in the county of Tioga and State of New York, and S. A. GA'RRISON, of Union, in the county of Broorne and State of New York, have invented a new and Improved Machine for Boring Hubs; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 is an elevation of our invention. Fig. 2 is a vertical section of the same, taken in the line as m, Fig. 2. Fig. 3 isa vertical secy y, Fig. 1.

Similar letters of reference indicate corresponding parts in the sevcral'figures.

Thisinvention relatesto anew and improved machine for boring the hubs of carriage-wheels to receive their boxes.

The object of the invention is to obtain a machine for the purpose specified which will perform the work expeditiously and in a per-' feet manner, and with a greater or less taper, as may be required.

To this end the invention consists in the employment or use of a hinged frame provided with a gage for the purpose of admitting the wheel to be accuratelycentered thereon, in connection with a'self-adjusting nut and adjustable'bearing, all arranged in such a manner asto effect the desired result.

A represents a fixed or permanent frame, which may be constructed in any proper manner, and B is a frame which is attached to the upper end of the frame A by hinges a, so arranged as to admit of the frame B being turned over in a horizontal position relatively with the frame A when desired. The face side of the frame B is provided with projecting arms a, for the convenience of securing the wheel 0 to it, which is done by means of screws I), passing through any of the parts of the wheel- The frame B, when in an upright position, is secured by a pin, 0, which passes through one shown in Fig. 1. To the frame B there is attached a metal frame, 0, composed of two parallel rods or bars, at (2, connected at their outer ends by an annular plate, e, and connected near their inner ends by an annular plate,f. If the frame 0' be of cast metal, the rods or bars 11 d and the annular plates 6 f may all be cast in one piece. I The plate f has rather a small opening, g, at its center considerably smaller than the opening h of plate e, and the former opening, 9, is at the center of a semispherical projec-' tion, t, which forms one half of'a socket, j, the

other half of which is formed by screwing an annular plate, It, in contact with f, said plate being provided with a projection, Z, like i, but havinga reverse position, so as to give a spherical form to the socket j, as shown clearly in i Fig. 2.

D is a screw which-passes through the openings at the centers of the plates fk,and through a nut, E, which is fitted in the socket j, and

has type-metal or other soft metal or composition cast around it within thesocketj. This external case, which is cast around the nut and is designated by j", gives a spherical form to the latter, corresponding to that of the socket j. This nut is allowed to oscillate or work in the socket, but not allowed to turn therein, it being prevented from so doing in' consequence of a projection, 70, whichis cast on it, fitting in a recess, Z, between the plates f k, and adjoining the socket j. (See Fig. 2.) The screw Dis not entirely cylindrical. It has four plane surfaces, at, extending its whole length at equal distances apart. In one end of the screw D a bit or cutter, F, is attached and secured firmly by a screw, it, and on the opposite end of the screw there is fitted a crank, G.

H represents a circular rotating head or disk which is composed of two annular plates, 0 p, fitted in the center of the annular plate 3 of the metal frame 0'. The inner plate, 0, of this disk abuts against a shoulder, q, in the inner side of plate 0, said shoulder being formed by an annular recess or'rabbet made in said plate around the opening at the inner side of the plate e. (See Fig. 2.) .The periphery of the outer plate, 1), is beveled and fits in the outer part of the opening of plate e, which is also beveled, as shown at q in Fig. 2. These two plates 0 p are connected by screws 0', and by screwing up the screws 1" may be fit ted in the plate 6, so as to avoid all play or casual movement. said result being attained by are not parallel therewith.

has an oblong slot or opening, t, made in it for the screw D topass through. This slot or openingt has an oblique position in the slide -I-'that is to say, the slide I has parallel sides and the sides of the slot or opening it (See Fig. 1.) The slideI is fitted between guides i attached to the plate 1), and is allowed to more freely between them, and is secured at any desired point within the scope of its movement by a set-screw, it. In consequence of this obliquity of the slot or opening 15 with the sides .of the slide I it will be seen that as the latter is moved the screw Dwill be shifted or moved in the openings of the plates 0 p, and a greater or less obliquity of the screw D with the axis of the wheel 0 may be obtained. This obliquity of the screw D with the hub or axis of the wheel will give a taper form to the hole bored in the hub of the wheel, and in order to obtain any precise taper the slide I may have a scale, a", engraved on it to obtain and facilimm the exact adjustment of the screw. The plane surfaces at on the screw D insure. the

turning of thehead or disk H with the screw, and the latter is fed to its work by the nut E in the socket), the spherical soft-metalcasing cylindricalcase is a very economical arrangement, as a true exterior is obtained ata trifling expense. In consequence of havingthe frame B attached to the frame A by hinges the securing of the wheel 0 to B is greatlyfacilitated, as the frame B may be turned over in a horizontal position and, the wheel 0 secured to it and the frame B then turned and secured in an upright working position, the face of the frame B to which the wheel is attached being provided with a gage, a (see dotted lines, Fig. 1,) to insure the properadjustmentof the wheel to said frame.

We do not claim, broadly, an adjustable rotating screw provided with a cutter for bore ing taper holes in hubs, for that is an old device; but i We do claim as new and desire to-secure by Letters Patent- I 1. The securing of the wheel 0 to-a supplemental frame, B, containing the-working parts of the machine, which frame is attached to the fixed frame A when the latter is in a horizontal position, as and for the purpose specified.

2. The nut E, provided with anexternal spherical case, j", of soft metal cast around it, inconnectionwiththesphericalsocketjfiormd in or between the plates f k, the case j" and nutE being prevented from turning in the socket j by a projection, k, substantially as herein set forth.

3. The disk or head H, formed of the two plates 0 p, fitted in the plate eof the frame 0, in connection with the slide I, screw D, and nut E, all arranged for joint operation, as and for the purpose herein set forth. 1

' G. T. PEARSALL.

S. A. GABRISON. Witnesses: v

JOHN S. .GILES,

GEORGE COOPER.

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