US291012A - Mining-machine - Google Patents

Description

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No. 291,012. Patented. Deo'. 25, v1883.

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` MINING MAQHIMB. No. 291,0'12. Patented Deo. 2'51883.

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XAvIEIi` KERN, JE., AND JOHN HAMMER, OE wEsT EEOOHEIELD, OHIO.

MINING-MACHINE.

y' SPECIFICATION formingV part of Letters Patent No. 291,012, dated December 25, ISES..

Application filed April2B,1S83. (No model.) A

To all whom it may concern.-

have invented ccrtainnew andl useful InI-V provements in Mining-Machines; and we do hereby-declare that the following is a full, clear, and exactdescription of the invention, whichwill enable others skilled in the art to which it appertains to makeand use lthe same, reference being had to the accompanying drawings, which form a partof this specification, and in which- Figure'l is a perspective view of the clamp which forms a part of our invention, showing it in Open adjustment for the reception of the screw-threaded drillshank. Fig. 2 is a sectional view of the clamp through its supporting lugs or trunnions, showing the clamp closed, Fig'. 3 is avdetail view'of the device for supporting the clamp and drill-shank in operating the machine; and Fig. 4 is a perspective view of the complete apparatus,show ing the same fixed in position ready for use.

Similar letters of reference indicate corre sponding parts in all the figures.

Our invention relates to mining-machines adapted to the mining of coal and other ininerals; and it consists in certain improvements upon the miningmachine for which Letters Patent of the United States No. 260,031 were granted to Xavier Kern, Jr., on the 27th day of June, 1882, which said improvements will be hereinafter more fully described and claimed. I

In the accompanying drawings, A represents the body of the drill-clamp, which is provided with two laterally-extending arms or trunnions, B, which latter are adapted to rest in the adjustable forked standard H, by fitting into the notches h of the same. This body portion A is provided on its inner face with a semi-cylindrical screw-threaded piece,

'0, which, when combined with the semi-cylindrical screw-threaded pieceD in the hinged portion E of the clamp, forms a female-screwthreaded socket, which iirmly holds, directs, and feeds the screw-threaded shank of the to fasten them removably in` their respective sections, A'and E, of the clamp, so that when the threads are worn out they may be readily removed-and others substituted without in! jury to the body portion of the clamp. The body portion A is also provided with two holes or sockets, c, into which are secured, screws or lugs b, for the purpose of taking up the wear. Vhen the clamp is first secured to the drill-shank, these screws or lugs bV are adj usted either in or outso as to cause the removable threaded clamp-sections C and D to register accurately with the drill-shank, and as the screw-threads in said parts C and D wear away the screws or lugs b may be filed off or driven farther into their respective sockets, to take up the wear. The hinged portion E of the clamp is provided with a slotted projection, F, adapted to engage the threaded shank of'a screw, G, the lower end of which is hinged upon a bolt, I-I, between the lugs or ears I, which are cast upon or in one piece with one of the fixed trunnions B. By swinging the screw G into the slotted projection F and tightening down the thumb-nut J, it will be seen that the two parts A and E may be clamped iirmly around the threaded drillshank, which works in the clamp, while,by loosening the thuml'rnut and swinging the screw out of the slotted projection F the clamp may be thrown open and the drill-shank removed in a moment of time. It will also be seen that by having the screw hinged and swinging transversely upon the body of the clamp the nut may bear upon the same place upon the slotted projection when the clamp is opened wider or closed, thus preventing all possibility `of the same slipping out of its slots, which is apt to happen with the screw projecting rigidly upward, when the clamp is opened wide.

In operating the apparatus, the trunnions B of the clamp are made to rest in the notches h of a forked standard, H,wl1ich has a threaded shank, K, screwed into a threaded aperture, 7c, at the outer end of an arm, L, the other end of which is notched to form sharp teeth or proj ections H. Ajaw-piece, N, is fastened to arm L by means of a screw-bolt, O, which is inauger orv drill, as thelatter is turned by hand or 2 by any other suitable motive power. Ve prefer to make the parts C and D of brass,- and serted through slots or apertures o and Zin Ioo the parts N and L, respectively, and is provided at its lower end with the nut I?. In

using` the apparatus, the teeth M and jaw N are inserted into the bore or serewhole last made, as shown in Fig. 4 on Sheet 2 of thc drawings, and adjusted by means of the nut P on bolt O, so as to be wedged rmly into the screw-hole, and fix arm L rmly in the same, after which the bifurcated bearing Hin the outer end of the arm may be adjusted by screwing it up or down, so as to bring the clamp, which rests in its notches 71, into the proper position for working the drill-shank, the lateral arms or trunnions B of the clamp permitting the contained drill or auger to be turned 0r pointed to any inclination or angle at which it is desired to bore in avertical plane, and the screw-threaded shank, turning in the threaded aperture, allows the drill to' be turned in any direction in a horizontal plane.

rlhe drill-shank (shown at Q) is made square at its rear end, to adapt it to be fitted into the slotted crank-arm R, in the slot S of which By loosening this nut, the slotted orankarm may be moved up or down upon the end of the drill-shank, so as to adjust the leverage with which it is desired to work the drill, according to the resistance of the material bored into.

Having thus described our invent-ion, we claim and desire to secure by Letters Patent of the United States- The combination of the arm adapted to be clamped into the former drill-hole, with the bifurcated standard, having notches in the edges of its bifurcated fiat upper ends and screw-threaded lower end, fitting and turning in a screw-threaded perforation in the outer end of the clamping-arm, as and for the purpose shown and set forth.

In testimony that we claim the foregoing as our own we have hereunto affixed our signatures in the presence of two witnesses.

XAVIER KERN, JR. JOHN HAMMER. Xlfitiiesses:

ISAAC ULMAN, WILL R. ULMAN.

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