US98821A - James watson - Google Patents

Description

J. WATSON.

Milling Mmhine. l No. 98,821. Patented Jan.. l1, 1.870.`

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JAMES WATSON, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 98,821, dated VJanuary 11,1870.

IMPROVED MILLING-MACHINE.

f The Schedulereferred to :in these Letters Patent and making part of the same.

scribed hereafter, which, although `adapted to a great.

variety of work, is especially intended for cutting the key-seats and feather-ways of shafts; a principal advantage ofthe machine being that it performs itsduty v,completely nand efectually, without requiring a tedious readjustm'ent or transferring of the work from one machine to anotheiyas heretofore.

In order to enable others, familiar with machinery of this. class, to make and use my invention, I will now proceed to describe its construct-ion and operation, reference being had to the accompanying drawing, which forms va part of this specification, andin which- Y Figure l is a front view of my improved millingmachine;

Figure 2, a transverse sectional view of the same, on the line 1-2, iig. 1;

Figure 3, a plan view;

Figures 4, 5, and 6, detached views of portions of the machine; and

Figure 7, a view of a modification.

Similar" letters refer to similar parts throughout the several views.

A represents the bed-plate vof the machine, upon which are formed guides, c a, for the sliding plate B, to which the work is secured; and at one end vof the said bed-plate is a pedestal or bracket, C, in suitable bearings'ou which, turns the driving-shaft D, furnished with 'a cone-pulley, b, and with atoothed pinion, c, the latter, through the medium of a cog-wheel, 1,communicating motion to a pinion, f, ot a spindle, H, which turns in suitable bearings ou a movablehead, I.

The latter is arranged to slide vertically upon guides g g, formed upon the bracket C, andis adj usted to any required position by means of a screw, h, operating iu a manner which will be readily understood by those familiar with machinery of this class.

The driving-shaft D being stationary, and the spindle H capable of a vertical adjustment, it is necessary that the cog-wheel 4d should be so arranged as to always remain in gear with the pinious c and f.

This is eiected by means of two arms, o' and i', (fig. 5,) hung to the shaft D and spindle H, and the outer ends of which are connected together by, and serve to support the spindle of the cog-wheel d.

When the spindle H is raised or lowered upon the vertical line x x, the armsi and t will adjust themselves accordingly, (sce dotted lines y y,) in such a manner as to retain their cog-wheel in gear with the piuions c andf.

The spindle H turns in a sleeve, j, (lig. 2,) which is itselt1 arranged to turn in a bearing of the head I, and to the front end of which is secured a flat disk, J, the latterbeing iu contact with the front of the head I, and having T-headed bolts, It R, adapted to a curved slot, l, of the said head, for the purpose of securing the disk in any position to which it may be adjusted. Y

' 'Ihe adjustable diskJ is furnished with a drill, m, and at a point directly opposite to this drill, with a rotarycutter, n., the spindle p, of the latter, turning in a tubular projection, p, of the disk, and having, at its rear end, a cog-wheel, q, gearing into the pinion f, the cog-wheel revolving around this pinion when the disk is adjusted, butv always remaining in gear with the same. (See figs. 2 and 5.)

rlhespindle. t', oi' the drill m., turns in a tubular projection or bracket, s, of the disk J, receives its motion from the spindle H through the bevel-gear s', and is adjusted toward or from the work by a screw, t, in the usual manner. l

The anti-friction-mctal box a, (ligs. 2 and 6,) which is set into the bearings s, for the reception of the drillspindle, is tightened against thelatter, as it wears, by means of blocks, o c, against which bear the ends of set-screws w w, this plan enabling the box to be used for a much longer time than usual, without permitting the spindle to work loose.

It has been usual, heretofore, in cutting A-the keyseats and feather-ways of shafts, to employ both a drill and a circula-r milling-tool, similar to those shown in the drawing, the groove being first cut by the milling-tool, after which the shaft is removed to a dii'e'rent machine, in order to square up the ends of the said groove by means of a drill. This removing ofthe shaft from one machine to another, and the time requirechin its readjustment, render the work, especially for heavy sliafting, both tedious and expensive, so much so, that when the key-seat or feather-way is of but moderate lengtlnit is found preferable to perform the whole operation by means of the drill alone.

The object of my present invention is, by combining the drill and milling-tool in one machine, to render the shifting or readj ustinent of the work unnecessary. l

Its operation is as follows:

Ihe shaft X, in which the key-seat is to be cnt, is properly secured upon the adjustable plate B, the disk J heilig then turned to the position shownin fig. l,

and secured to the head I, by means oi' the bolt k.

Motion is then communicated to the driving-shaft, and transmitted, through the gearing described, tothe drill m, the latter being then lowered, by means of its screw t, util a hole of' the depth of the key-seat has been out in' the shaft. The plate B, and shaft, are next so adjust-ed, that at the second descent of the drill, aAhole shall be cut at a point coinciding with the opposite end ofthe key-seat.

After this the bolts It are loosened, and the disk J is, without stopping the motion of the machine, turned half way'around, or to the position shown in fig. 4, the disk being then secured as before, and depressed by a proper operation of the screw 7l, until the `mill ing-tool n cuts into the shaft to the proper depth of the key-seat.

All that now remains to be done is to move the plate B, and shaft, longitudinally until the cutting of the groove is complete, the drill-holes rst made forming the ends of the saine, as clearly shown in iig. 4.,

lIhe above machine, although intended especially for cutting key-seats and feather-ways, is, it will `be' evident, adapted for the performance of a great variety of work, and in order to increase its usefulness, a portion ofthe bracket C may, if desired, be made adjustable, as shown in fig. 7, so as to enable the cutting to be performed at any angle. A

Iam aware that a revolving disk, carrying a series of radial drills, any one of which may be employed by adjusting the disk, has been used; but it willvbe seen that in the almve-described improvement, the arrangemeut on the disk of both radial and transverse shafts,

revolving at different rates of speed, perm-its th'e suecessive use of tools very different in character and operation, so that operations can be performed in one machine, and without removing the article operated ontha't could otherwise be effected only with two distinct and very different machines, and by the transfer ofthe article from one to the other.` Without claiming, broadly, a revolving disk, carrying two or more revolving cutters or tools,

I claim as my invention, and desire to secure by Letters Patent- 1.` The revolving disk J, in combination with a. radial shaft, r, carrying a drill, on, a transverse shaft, p, carrying a milling-tool, n, and'with the shaft ,1-I, cogwheels (I, f, and q, and bevel-gear s', or equivalent devices for operating the shafts, substantially as described.

2. The combination of the revolving disk J, its shafts p and H, and cog q, with the 'arms 't ,drivingpinion '0, wheel d, and pinion f, as specified.

In testimony whereof, I have signed my name to this specification, in the presence of two -subscribing witnesses.

JAMES WATSON.

Witnesses i E. H BAILEY, HARRY SMrrH.

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