US282382A

US282382A - shedlock

Info

Publication number: US282382A
Authority: US
Publication date: 1883-07-31
Anticipated expiration: 1900-07-31

Description

(No Model.) 2 Sheets--Sheet 1. A. SHEDLOGK. RDGK DRILLING MAGHINE.

1%.. 282,382. Patented July 31,1883.

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2 SheetsSheet 2.

K O O L D E S L m m M 0 W l ROCK DRILLING MACHINE. No. 282,382.

Patented July 31, 1883.

l ll N. PETERS. vhnw-mhn n hur. Washington, D c

To all whom it may concern.-

PATENT OFFICE.

ALFRED sHEDLooK, OF BROOKLYN,

NEWV YORK, ASSIGNOR TO JOHN D.

SHEDLOOK, on SAME PLACE.

ROCK-DRILLING \MACHINE.

SPECIFICATION forming part of Letters Patent No. 282,382, dated July 31, 1883.

Application filed November 27, 1882. No model.)

Be it known that I, ALFRED SHEDLOOK, of Brooklyn, county of Kings, State of New York, have invented certain new and useful Improvements in Rock-Drilling Machines, ofwhich the following is a specification.

The rock-drilling machine forming the sub ject of this invention is designed for drilling holes in a downward direction. The construction and operation of the same will be fully understood by reference had to the accompanying drawings, in which- Figure 1, Sheet 1, is a side elevation. Fig. 2, Sheet 1, is a plan view. Fig. 3, Sheet 2, is a side elevation of the body, &c., partly in section, on an enlarged scale- Fig. 4., Sheet 2, is a vertical section cut through the line a: m, Fig. 3. Fig. 5, Sheet 2, is a transverse section taken on the line y Fig. 6, Sheet 1, is

atransverse section taken on the line 2 z. Fig. 7, Sheet 2, is a detached view of the drillchuck; and Figs. 8, 9, 10, and 11, Sheet 2, are illustrative diagrams, showing the develop ment of the actuating cam and device for causing the rotation of the drill.

The frame of the machine consists of two vertical guide-bars, wand a, fitted at their upper ends to the head-piece a and at their lower ends to the foot-piece a, which is provided with a supporting-point, c To the headpiece a is secured, by means of bolts and nuts If I)", the bracing-bars band b, connected together by the cross-brace b, and to the footpiece a is secured, by means of bolts and nuts 0 0 the two curvedbars c and c, whichare pointed and curved outwardly at their ends, as shown at Fig. 2, so as to provide a broad base for the machine. The bracing-bars b and b and the curved bars a and c, on each side of the machine, are clamped together by the double yokes o? 0, adapted to allow the bars to be moved in relation to one another, so that the pointed ends of the curved bars 0' and 0 may be adjusted to meet uneven parts of the rock, as shown at Fig l, and be held firmly, when adjusted, by means of the set-screws 'which pass through the sides of the double yokes c c. The nuts of the bolts and nuts If b and c c are also tightened when the frame is adjusted inthe desired position. It will be observed that the guide-bars a, and a may be set in a vertical position, .or at a few degrees on either side of the vertical, which are the only direction of holes the machine is designed to drill. On the cross-brace b is attached the seat (Z by means of the hooks d d,

- so that it is readily removed to allow the machine to be fixed to occupy small spaces for transportation, &c., the bracingbars b and b and curved bars 0 and 0 being then folded alongside the guide-bars a and a by sliding the bars 6 and I) out of the double yokes c c". All of the principal operating parts of the machine are located in the cylindrical body 6, and all of the movements necessary to' the proper working of the drill are accomplished by means of one cam. 1

The body 0 is provided with four lugs, e e,

throu h which the uide-bars a and'a ass b b p 7 audit has a cap, 6", screwed into the upper end of it. In the center of this cap 6 works the bush-bearing), having a square hole formed through it, and a screw-thread on its lower end, by which it is secured to the double peripherial cam g, which, when rotated, acts against the two rollers it h on studs secured, to theinside of the upper end of the" drillholder t. This drill-holder is shown as being cylindrical in form, and having a neck, t", at

its lower end, fitted to rotate and slide longi-' tudinally in a hole in the bottom of the body e, and in the extreme end of this neck a" is formed a hole in which the shank of the drill thereto by means of the yoke-clutch 76, formed, as shown at Fig. 7, with two inclined sides, one of which fits into a groove cut through the side of the necki into the hole in which the shank of the drill j is placed, so as to press against the shank, and the other one bears against the back of the neck i when the setscrew 7c is forced against the neck, so that a wedging action is thereby employed to hold thedrill firmly in the neck i, and as there are three points of contact the liability of the drill becoming loose is reduced to a minimum.

To cause the drill to be partly rotated after each stroke, two series of ribs, Z and m, are

formed on the inside of the body 0, the num, ber of ribs in each series being equal to the number of strokes the drill is designed to make during one revolution, which in the present j is fitted, said drill being securely attached case is eleven, and on the outside of the drillholder tare formed ribs or projections 91, so located as to bear against the ribs Z or m. There may be as many of these projections n as there are ribsin each series, but four only are shown, as affording sufficient wearing-surface. The upper series of ribs, m. are placed opposite the spaces between the lower series of ribs, Z, and the action of the projections a thereon when the cam g is rotated will be hereinafter explained. I i

The cam g is rotated by means of the square shaft 0, secured to the bevel-wheel, p, fitted to rotate in the center of theheadpiece a of the frame, and into this wheel meshes the bevelwheel q, secured to the horizontal shaft q, also having its bearings in headpiece a and to the ends of which are secured the crank-handles r. The wheel 1 bears such relation as to size to the wheel 1) that one full revolution of the handles produces two strokes of the drill, as will be hereinafter explained.

Inside the drill-holder 1?, between its lower end and the washers, bearing against the bottom of the cam y, is placed the spiral spring 8. It will be observed that by arranging the working parts on a common axis all pressure due to the compression of the spring 8 when the cam g is rotated is resisted by the metal of the cam between its under side and the faces of its rises, thereby leaving the cam-bearing f free to rotate in the cap 6 without undue friction.

The stirrup-straps o c ,hooked over the pro- 5 jections *v" 011 the body 0, are for the purpose of regulating the downward feed of the body by foot-pressure of the operator.

The hook t is for the purpose of holding up the body a when the drill is not in use. a is a water-can for supplying water to the point'of the drill, the quantity so supplied being regulated by the cock at.

The operation is as follows: The body is allowed to slide down the guide-bars a and a until the end of the drill rests 011 the surface to be drilled, the body then being supported by the spring 8, which is slightly compressed thereby, so that the bottom of the drill'holder is away from the bottom of the body. Upon. turning the crank-handles r the cam g is rotated, and, acting against the rollers hh, raises the drill and holder 1' and compresses the spring 8, which causes a strain on the square shaft 0, as well as tends to turn the body e, so as to produce suflicient friction between the square shaft 0 and bush-bearing f, and between the guidebars a and a and the holes through which they pass in the body 6, as to prevent the body and other parts from falling.

\ I11 the diagrams, Figs. 8, 9, 10, the dotted triangles represent the development of one side of the cam g, and the dotted circles one of the rollers h. The projectionsn, at the commencement of rotation of the cam, bear against the side of the ribs Z, (see Fig. 8,) and slide up these ribs as the drill-holder is raised until their lower ends clear the tops of the ribs.

This occurs just before the rollers h reach the summit of the cam, the cams then forcing the projections a over the tops of the ribs Z (see Fig. 9) until they come in contact with the ribs m. The drill-holder and drill have now made oneeleventh of a revolution, and the cams, in clearing themselves of the rollers h 71, raise the projections n a short distance up the side of the ribs m (See Fig. 10.) Fig. 3 also shows the parts of the machine at this time. As soon as the cams leave the rollers the proj ections a fall down into the next spaces between the ribs Z as the drill is forcibly driven against the rock by the spring 8, the speed of the drill being such that it reaches the rock before the body, which is now released, has

had time to fall to interfere with the proper action of the spring 8, and the weight of the body may be so proportioned as to counteract the rebound of the spring to prevent its bottom being struck by the bottom of the drillholder, so that the full force of the energy eX- pended in turning the crank-handles will be utilized in effective work. The body, with the working parts, fall together as fast as the drill cuts, so as to maintain their relative working positions. I

Instead of making the body heavy enough to produce the effect described, stirrups o o are preferably attached thereto, in which the operator places his feet to offer the desired resistance to the rebound by foot-pressure, as shown in Figs. 1 and 2.

It will be observed that the double cam g in making one revolution would raise the drill-holder twice, provided the drill-holder fell down with the projections n against the same surfaces against which they are raised; but as the cam has to carry the holderzpartly around equal to the spacing of the ribs Z, which in this case is the one-eleventh of a revolution, it is necessary that the teeth in the wheel q bear the proportion to those in the wheel 1) as thirteen is to eleven when it is desired to produce two strokes of the drill for each full revolution ofthe crank-handles. The number of teeth of the wheels q and 1) may bear any relation to one another desired without interfering with the principles of operation of the machine. I11 Fig. 11 the ribs Z and m are shown as having parallel sides; but I prefer to make one side of them inclined, as shown in the other views, as the projections a slide freer up the inclined sides, and the greater strength is given to the ribs. v

The shaft 0, instead of being square, may be round, with a flat side or keyway to work against a key fixed in the bush-bearing f.

What I claim, and desire to secure by Letters Patent, is-

1. In a rock-drilling machine, a cylindrical sliding body having an inclosing-cap, and provided with internal ribs, a drill-holder extend ing through the bottom of the body, and provided with ribs arranged to work against and be guided by the ribs in the body, and a cam adapted to raise the drill-holder, all on a common axis, substantially as andfor the purpose set forth. 1

2. In a rock-drilling machine, the following elements in combination, all on a common axis: a sliding body, a drill-holder arranged within and extended through the bottom of the body, a cam fitted to rotate in. the upperpart of the body, aspring located lgetween the drill-holder and the cam, and afixed rotating shaft adapted to actuate the cam in all positions occupied by it and the body, and to hold the body stationary by friction due to the resistance offered by the cam when the drill-holder, is being raised thereby, substantially as set forth.

3. I11 combination, the bevel-wheels q and 19, secured, respectively, to the shaft g, provided with crank-handles- 1', and to the shaft 0, cam g, drill-holder 11, provided with projections n, and the body 6, provided with the ribs Z and m, the shaft 0, the cam g, the drill-holder i, and the body 6, all being on a common axis, substantially as set forth.

4. The combination of the drill-holder i,

with projections a, spring .9, placed between the cam g and thedrill-holder i, cam g, and body e, ribsl and an, all on a common axis, substantially as set forth. 1

5. In a rock-drilling machine, a frame composed of the rods a a, foot-piece a head-piece (1 the actuating mechanism carried by the body 6, adapted to freely slide on the rods'c a the shaft with bevel-wheel q,and bevelwheel 11, connected to the shaft 0, adapted to actuate the mechanism carried by the body in all positions of the body on the rods aa, substantially as and for the purpose set forth.

(j. In" a frame for rock-drilling machines, in combination, the guide-bars a a! head and foot pieces, a? and a, bracing-bars b and Z), curved pointed bars 0 and c, forming the rear supporting-legs of the machine, clampingyolres c c", and cross-brace b, and seat (1', attached to the cross-brace 11, substantially as set forth. 1

7. The drill-holder of a rock-drilling ma- .chine provided with projections, in combination with a cam, a spring located between the drill-holder and the cam, and a sliding 'body provided .1 with ribs, all 011 a common axis, whereby the drill-holder is raised to within a short distance of its throw, then partly rotated, then completely raised, and then freed from the cam and forced back by the spring, substantially as and for the purpose set forth.

In witness whereof I have hereunto set my hand at New York, county and State of New York, this 25th-day of NovembenA D. 1882.

ALFRED SHElDLOCK. Witnesses:

H. D. WILLIAMS, 1 E. G. BAKER.