US91765A - John north - Google Patents

Description

staat (iiiliw.

JOHN NORTH, OF NEW YORK, N.

Y., ASSIGNOR TO HIMSELF AND WILLIAM T. HoL'r, oF SAME PLACE.

Letters .Pci-ent No. 91,765, dated func 22, 1869.

IMPROVED ROCK-DRILLING- APPARATUS The Schedule referred to in thse Letters Patent and making part of the same.

To all 'whom it may concerni- Be it known that I, JOHN NORTH, of the city,

`county, and State .of New York, have invented a new and useful Machine for Drilling in Rock and in the f Earth; and l do hereby declare that the following is a full, clear, and exact description of the construct-ion and operation of the same. reference heilig had to the annexed drawings, making a part of this specitication, iu which- I Figure 1 is a vertical perspective view-of said machine; l

Figure 2 is a plan of the same;

Figure 3 is a horizontal section thereof;

Figure 4 is a detached View of the adjust-able frictional feed-gears.

`The chief `aim or purpose of my invention is to furnish suitable machinery for successfully operating a centain diamond-pointed rock-drill, patented by Itudolphe Leschot, in 1863, but it may be used as' well for operating any kind of rotating drill or tool for boring in rocksI or in the earth.

My invention consists in a combination of mechanical devices for the rotating, feeding, controlling, and adjusting of the drill, so that the same may be couvenieutly operated without loss of power or time, and made to drill in an'y direction without changing the position of the machine.

To enable others skilled in the art to make and use my invention, I will proceed to describe its construction and operation, with reference to the drawings.

In constructing my drilling-machine, I make the upright shafts A A, l, fastenedY together at each end by the cross-bars c c, having extension-screws, B B BB, which are used to set the machine firmly against the sides of the drift or tunnel in which it is operated.

'lo this upright frame, I attach a movable drillframe, D, which slides upon the same, and -is held fast at any desired point by the clamp H and nut g, iig. 2, which is 4screwed against the clamp H.

Inside of this drill-frame I), l secure the circular disk of the drill-head E, figs. l and 3, by means of the hollow shaft J, which is connected therewith, and forms a part of `the same.

This hollow shaft passes through the respective centres of the frame D, clampH, and nut g, and is held fast by the nut l, iig. 3.

The outer periphery of the circulai' plate of this drill-head E is slightly bevelled, to tit the adjustable frame l), causing a friction when the nut K is screwed fight.

The drill-head is thus held fast at any desired point, with its attached drill-rod inclined to any angle required for drilling, and the drill is pointed in any direction, to suit the operator, by releasing the uut'K, which secures the drill-head, as described.

. The drill-head E is supplied with two boxes, attached to the same, for the support of the? n'ut and sleevegear, through which the'screw-s'haf't It wor' Y ,The feed-shafts is-snpported on the opposit jsi parallel to the screw-shaft lt, audis held securebythe saine'caps, V Y, which hold the 4sleeve-gears and screwshaft. i y

'lhe crank l? is fastened tothe pinion O, and re'- volves on a stud made fast to the adjustable arm W.

The pinion O gears into gear N,which is screwedl fast to thc shaft VL, passing through the hollow shaft' of the drill-head. y

This shaft L, which is thedriving-shaft,has a bevelgear attached to its front end, gearing into the lower teeth of the sleeve-gear, which is feathered into the slot of the screw-shaft, as shown in `fig. 1, whereby a rotary motion is impartedto the screw-shaft and drili.l

By releasing the nut K, the position ofthe crank P and pinion O may be changed to suit the operator, and worked either at top of gear 'N as shown, fig. 1, or at bottom of same.

The drillu'od or tube 3, of any desirable length, passes through the hollow screw-shaft R, and is held fast to the same at any desired point by means of the' setfscrews and chock, 2 2.

This drill-rod has a thread cult on its lower end, ofa pitch opposite to that of the thread upon the screwshaft, Vto which the boring-head or bit, with diamond teethgfis screwed-iast.

rlhe gear Y, whichis the upper portion of the sleeve gear, figs. 1 and 2,-gea1ing into gear X, gives motionl to the feedfshaft S, which revolves in au opposite direction to the screw-shaft.

At the lower end of the feed-shaft 8 is attached the feed-gear A, which gears into gear B2, made fastto the screwnut- 5.

Feed-gear N has one or more teeth more than gear B, causing the nut to run faster than the screw, and giving a positive feeding or forward motion to the screwshaft and drill, called a differential feed.

In my experience in drilling stone'with diamonds, I have found that in order to drill hard and soft stone with the saine machine, a seltladjusting feed is desira- Able, as the diamonds are otherwise liable to be loosened in their settings, by drilling through soft rock liuto hard rock at a high rate of speed. I therefore use a self-adjnsting feed, in combination with the diff ferential feed above described.

Imake the feed-geai-A a frictional one, (see iig. 4,) and thereby produce a combined differential aud frictional feed.

The iced-shaft S is made tapering at its lower end, A, fig.4, and-tbe feed-gear A2 is made to fit the same, and backed by a washer 0I' collar, B, and is held in position and adjusted bythe nut 2.

The feed-gear vbeing adjusted sufficiently tight to drive the screw-nut when drilling soft roel-:,011 coming to hard rock, the fri/tional gear will slip, and thus the pressure; when the drill-bit will he adjusted at a uniform rate.

All danger of injuring or loosening the diamonds, by changes inthe hardness of the rock, is thus. obviated.

The gear X, attached tothe upper end of the feedshaft 8, is so arranged as to be slipped out of gear when the screw has run down to any desired depth,

-causi'ng the screw to run up its length by the same motion of the engine or cra-nk, and driving-shaft L,

Awhich carried it down, but with a; velocity far greater.

When the gear X is slipped back'iu place, the screw feeds down again, as before. This gear is-easily adj ustable on the feed-shaft 8, to which itis fastened-by the motion ofthe finger.

Tlev'sliding steady-guide tis adjustable toauy posi- `tion, andis'used to steady the drill-rod or boring-bar,

as lthe 4sgnnefpasse's into the rook, in order to prevent any shake ortreiuor of the same in boring. l

^ 'lain'aware that other machines have been invented for operating drills of various kinds, and I hereby expies'slQy-'lxlisolaim all previous inventions of like 'nature with luy-own, particularly that of A. Haupt. of May 2, 18655. but

What `I claim as my invent-ion, and desire to secure by Letters Patent, is- 4 l. The drill-frame D, adjustable at any point upon the upright frame A A, by means of the nut g, when said frame is used in combination with the swivel-head E, substantially as and for the purposes set forth.

2. The swivel drill-head E, support-ing a sleeve-gear and drill-rod, when used in combination wit-h a drillframe, lwhether adjustable or otherwise, and secured thereto by the hollow shaft I and the nut K, substantially as and for the purposes set forth.

3. The hollow screw-shaft It, when used'iu combination with the swivel drill-head, sleeve-gear, and feednut, or their quivalents, substantially as and for the purposes described.

4. The release-gear X, when used in combination with the driving and sleeve-gear, substantially as and for the purposes described. l

5. The adjustable steady-guide, when used in eombination with the drill-head, screw-shaft, and boringbar, substantially as and for the purposes speoified.

6. The straight and continuous driving-shaftL, passing through the crank-arm V, clamp H, hollow shaft J, nuts g and K, and driil-head E, substantially as and for the purposes specified.

. JOHN NORTH.

Witnesses L. WEAVER, WILLIAM GIRQD.

Images