US299496A - richards - Google Patents

Description

(No Model.) f Sheets-Sheet .J. .RIGHARDS. e

` METAL BORING AND SLOTTING MACHINE. No. 299,496. Patented May 27, 1884.

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2 Sheets-Sheet 2..

(No Model.)

J. RICHARDS.

v METAL BORING AND SLOTTING MAGHINB. No. 299,496.

Patented May 2,7, 1884.

- UNITI-313v STATES PATENT QFFICE.

METAL BORING AND SLOTTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 299,496, dated May 27, 1884.

Application filed February 10, 1883. (No model.)

.To @ZZ whom' it may concern:

Be it known that I, JOHN RICHARDS, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Metal Boring and Slotting Machines, and I do hereby declare the following to be a full, clear, and exact description of the invention, such' as will enable others skilled in the art to which it appertains tol make and use the same.

This invention relates to machines for turning and boring metals, commonly termed boring-mills, and to adapting the same for outting keyways or slotting.

The invention consists,mainly, in the means for giving the cutter-bars of such machines a reciprocating motion,that is derived from the same mechanism` employed to feed the bars upward or downward in boring or turning, such mechanism being so arranged and driven in respect to strength and speed as to ll both requirements.

It also consists in the combinatiomwith the saddles on such machines, of screws for imparting a lateral feed to said saddles, each saddle being provided with two nutsone for each screw-so that by connecting the saddles to different sorews at will the lateral feed of said saddles can be independent, and thus started, stopped, or reversed without changing the feeddriving gearing, or the rate of feed can be greater or less on either saddle, as the work may require.

I am aware that metal turning and boring machines have been arranged with a reciproeating motion of their cutter-bars for cutting keyways and similar work, but not in the manner of my invention,the driving-gearing, to produce such` motion being heretofore independent of the feed-motion,and separate from other gearing ofthe machines. Such methods require the reciprocating mechanism to be engaged and disengaged, and are not operative for any but a vertical or nearly vertical stroke of the cutter-bars.

In the annexed drawings, illustrating my invention, Figure lis a front elevation of a common boring and turning machine with my improvements. Fig. 2 is an end view of the same. Fig. 3 is an enlarged section on the line xm of Fig. l. Fig. 4 is a detail view showing the manner of operating the feeding mechanism of the saddles.

Like letters of reference indicate the same Y parts in the several views.

A is the main frame; B, thetable or faceplate on which work` is mounted, and P is a pulley in position to be slotted or grooved for a key.

a a are cutter-bars carrying tools b b for turning, boring, or slotting.

c c are saddles sliding on the cross-beam d, and carrying the spindles or cutter-bars a a.

e e are two screws-one right, the other left- 6 5 employed for feeding the saddles either way upon the beam d and independently of each other, as hereinafter described.

f is a motion-rod employed fortwo purposesone to feed the bars a a up or down in boring 7o o'r turning, and the other to give these bars a rapid motion for` cutting keyways or slotting.

In the case of feeding the cutter-bars vertically, this rod or shaft f is driven from the gearing at g by any of the usual methods, a connection with the running table B or its gearing, as shown, for example, by dotted lines in Fig. l, being preferable. This motion from the rod f is communicated to the bars a c by means of a worm and wheel, (shown at h i in Fig 3, also 8o in dotted lines in Fig. 1,) each wheel h being provided with a hub or sleeve, 7L', through which passes a shaft, 7c, having Ia pinion, k,

that engages with a rack, a', on the reciprocating cutter-bar. The worm-wheel 7L is loose 85 on the pinion-shaft k, but is connected in feeding the cutter -bars vertically by the cone clutch-plate m, hand-nut o, and rod p, as shown in Fig. 3. For vertical feeding the motion of this gearing is slow, the rod f making approxi` 9o mately as many revolutions as the tableB; but for cutting keyways, as shown in Fig. 1, the gearing at g is disengaged from its drivingpower and the belt-driving gearing at s s is put in use. By this means the rod f is driven at a much greater speed, the number of revolutions being, for example, one hundred times more, and fast enough to produce through the gearing h i a reciprocating motion of the bars a a, corresponding toJ a common slotting ICO or planing machine, from eight to twenty feet a minute, as the nature of the work may permit. There arc two bands applied at ss-one for the upstroke and one for the downstrokc of the barsaa, the upstrokebeing more rapid, asin the case of planing or other reciprocating machines for metal-cutting. The bands are shifted by means of the lever t and rod c, by hand; or automatic shifting-gearing can be employed7 as in the case of planing-machines, the principle of operation remaining the same in either case.

It will be observed that the saddles c c are each provided with a rotary plate7 c', having ahub through which the sleeve It and the pinion-shaft k are passed. The rotary plate c is provided with guide-loops clz ci, for the reciprocating cutter-bar.

In this manner it may be seen that the bars ca can operate at any angle and for any range required in keyway-cutting7 the added mechanism required for that purpose consisting only of the belt-driving gearing at s s, and the vertical feeding parts constructed strong enough to sustain a rapid reciprocating motion. For traversing the saddles c c and bars a a on the beam or cross-head (LI employ two screws, e 0'- one right, the other left, or else alike, and revolving in opposite directions,which is practically the same thing. rIhe saddles c c can be connected with either of the screws by halfnuts '10, in the usual manner7 as shown in Fig. et. The top and bottom parts, y y, of these nuts have no screw-threads, being only supportingbearings7 the nut c sliding between and engaging either the upper or the lower screw,accord ing as the handle w is moved up or down, so that the saddles c c and bars c c can move to the right or left independently when connected to different screws. These screws are each provided with a spur-gear, as shown in Fig. 1, the upper screw being actuated by a spurgcar on the motion-rod f, and an idler-gear being arranged to mesh with the gears on each of said screwshafts, to transmit motion from one to the other. These gears will be so arranged that they can be readily thrown out of mesh when it is not necessary to impart alateral feed to the saddles.

It is obvious that the mechanism for driving the motion-rodf and screw-shafts e c can be varied without affecting the principle of my invention.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is

l. 'Ihe combination of the saddle c, reciproeating cutter-bar a, having rack a', the motionrodf, provided with worm-gear t', the wormwheel h, cone-plate m, the shaft 7c, carrying pinion k', the rod p, and nut o7 substantially as shown and described.

2. The combinatiomwith the saddles c c, carrying half-nuts w, and reciprocating cutters a, of the feed-serews e e', and means for actuating the same, substantially as shown and described.

3. The combination of the saddles c c, reciprocating cutter-bars a a, having racks a c', the feed-screws c e',motion`rodf, having wormgear i, the worm-wheel 7L, pinion k', and suitable connecting and actuating mechanisnnsubstantially as shown and described.

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

JOI-IN RICHARDS.

Witnesses:

Gno. BINNs, FRANK OR'BELL.

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