US534692A - Rock-drill - Google Patents

Description

(No Mandel.) 2 `slleew-sneet 1.-

A Gy. W. JONES.

BooK-DRILL. y

Patented Feb. 2 6, 1895.

Bill.. u

ATTDTTNEY.

m: Norms PETERS co, wnoau'mn.. wAsHlNaToN. D4 c,

INITED STATES PATENT EEicE.

Y GEORGE W. JONES, OF CLEVELAND, OHIO.

ROCK-DRILL.

SPECIFICATION forming part of Letters Patent No. 534,692, dated February 26, 1895..

Application iiled April `30, 1894.

To all whom, t wuty concern:

Be it known that I, GEORGE W. JONES, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Rock-Drills; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains 'to make and use the same.

My invention relates to rock drills, and the invention consists of the construction and combination of parts substantially as shown and described and particularly pointed out in the claims. Y

In the accompanying drawings, Figurel is a vertical central sectional elevation of the -drill supporting and actuating mechanism.

Fig. 2 is a vertical elevation of said mechan ism with the parts shown in Fig. l turned quarter way around. Fig. 3 is a cross section enlarged on line Fig. 2, looking down. Fig. 4 is a vertical sectional elevation on a line corresponding to z, z, Fig. 6, looking downward. Fig. 5 is an elevation of the parts shown in Fig. 4 with the upper part in section on line y, y, Fig. 6. Fig. 6 is across section on a line corresponding to line x, x, Figs. 4 and 5. Fig. 7, Sheet 1, is an enlarged sectional view of parts of the valve mechanism.

The construction here shown comprises a supporting saddle A clamped upon the cross shaft or rod B by clamping screws -2- passing through the jaws -3- of the saddle A. Attached to the said saddle and adjustable as to the angle on the shaft F is the vertical supporting back having a hub upon its rear provided with a beveled flange adapted toengage in a beveled seat upon the face of the saddle A.

The foregoing mechanism is the subjectmatter of another application bearing Serial No. 519,808.

The seat on the saddle A is undercut both at the bottom and sides, Figs. l and 6, and' the hanged hub -l5- is inserted from above. A correspondingly dovetailed or beveled cross-piece -16- engages the upper edge of the iiange -15- and is held firmly therein by a short locking bolt 1S- entering through the'slotin the top of vhub A, as seen in Fig. 3. By these means, or their equiva- Serial No. 509,451. (No model.)

lent, the parts A and H are made rigid with one another but are also separable.

The mechanism for operating the drill is suspended from the back supporting piece H by means of a long threaded screw rod L, which passes through the head -20- of the support H, and a handled lever 2l-serves t0 turn said screw rod in either direction as the operations of the drill may require. The drill Aactuating steam cylinder M is supported upon this rod L through the projection-22- at its rear, and this projection, Fig. 6, has lateral flanges -23- which work in guideways, grooves or channels in the sides of the back support H, so that as the cylinder and partsare adjpsted up and down by means of the threaded. rod L they are confinedin their proper relation and place by said flanges and channels'.

In the steam cylinder M is a reciprocating piston N having heads -24- with inclined or curved surfaces -25- at their base constructed to actuate the valves as hereinafter described. At one side and centrally of the cylinder M is a valve chamber -27 with separate cylindrical, barrel shaped, perforated valves -28- at the ends of said chamber and at right angles to the axis of the piston. These valves have central headed stems -29- projecting inward toward the piston,

and a rock bar -30-, pivoted at its center, overlaps these heads at its ends and is itself actuated by the piston N, the inclined vsurfaces -25- of said piston striking the eX- tremities of the said bar alternately and alternately depressing the Valves-28+ according as the piston N is moved in one direction or the other. A central diaphragm -26- in valve 2S- carries said headed stems -2 9- and the inlet and exhaust holes are on opposite sides ot this diaphragm. Each valve 28 is pressed back by the live steam when pressure by rock bar -30- is relieved. The piston N is connected rigidly with the drill rod O by means of a connecting rod P, which is suitably packed where it passes through the head of said cylinder.

At its upper end the piston N has a central bore'extendin g inward into its neck some distance, and this bore has spiral grooves corresponding in section to the formation of the IOO spiral shaft R. When the drill is carried down to work it is desirable that the action should be straight and direct without turning, but in order that it shall not strike its successive blows at the same place, but vary the same step by step, I have provided means for rotating the drill slightly on each up or return movement. This consists in a short spiral rod R, supported in the head of the cylinder M by means ot a collar or head T rigid therewith and resting upon a plate -32--. forming the immediate head ot the cylinder but built in between the part S and the flange of the cylinder. The collar T is set into a recess in the head piece S above plate 32, and around aboutthis collar is a spring` clamp -33-, having enlarged extremities #34E- and -35- projecting laterallyinto a side recess Within head part S. The arm 3ftrests against the side ot this recess, While a movable steam actuated cylindrical plug' -37- is adapted to press against the arm -35- of the said clamping ring. New, in order that the said ring may be tightened when the piston N is on the up stroke, l provide the said plug -87- and a steam channel 3dfrom the bottoni of cylinder ll/I, for steam to enter the chamber behind said plug. This presses the plug 37- inward and tightens the clam p -33-, thus causing the clamp to lock on the collar T and hold it from turning. Hence, when the pistou rises the piston must turn upon the rod B., anditheir connection being spiral, the piston necessarily must rotate as it rises and thus give a turning movement to the drill. Vhen the piston is on the down stroke the steam is cut ott' from channel -39- and plug -37- and the spiral rod R with its collar T is caused to turn as the piston and the drill make a direct down stroke. 1

The spirally grooved rod R is adapted to turn in the plate -32- and when steam enters the chamber above the piston it may also enter the chamber in which the head T and clamp -3- are located, and in doing so it will drive the plug -37- back so as to release the said clamp from the head T, if it be not already released; but when the steam exhausts from the chamber above the piston and enters the chamber beneath and acts upon the head of plug -37- there is no pressure in the clamp chamber and hence nothing to interfere with the action of said plug in locking said clamp on the head T.

Having thus described my invention, what I claim isl. The mechanism herein described for rotating the drill, consisting in the steam cylin der and the piston therein, and the dri-ll rigidly connected with said piston, in combination with a steam chamber at the head of said cylinder, a spiral rod extending into the said piston and having a head in the said steam chamber, and a clamp in said chamber about the edge of said head to engage and hold said head and rod from turning, substantially as set forth.

2. The means described for rotating the drill, consisting ot the piston and the drill rod connected rigidly therewith, the cylinder in which said piston operates, a chamber outside said cylinder, a head on said rod located in said chamber, and a clamping band in said chamber and a steam actuated plug to tighten said band, substantially as set forth.

3. The construction described, consisting ot the steam cylinder and the chamber at the head of said cylinder, and a steam duct leading from the bottom of said cylinder to said chamber, in combination with a drill actuating piston in said cylinderl having a bore down through its center, a spiral rod working in said bore and provided with ahead in the said chamber, a band encircling said head and a steam actuated plug to bear against the end of said band and tighten the same, substantially as set forth.

4t. The construction described, consisting of the cylinder having a valve chamber at one side thereof, and abarrel shaped valve at each end of said chamber having a central diaphragm, and perforations on each side of said diaphragm entering into said valve, in combination with a piston in said cylinder having heads at its ends, a rock bar between said Valves and said piston and pivoted at its center and having its ends projecting into thev path of the said piston, whereby when the piston travels back and forth it alternately depresses the ends of said rock bar and actuates said valves, substantially as set forth.

Witness my hand to the foregoing specification.

GEORGE W. JONES.

Witnesses:

II. T. FIsHER,

GEORGIA SCHAEFFER.

IOO

Images