US358479A

US358479A - Mining-drill

Info

Publication number: US358479A
Authority: US
Publication date: 1887-03-01
Anticipated expiration: 1904-03-01

Description

(No Model.) V

- J B. POWELL 80 W. D. LEWIS.

MINING DRILL.

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UNITED STATES PATENT OFFICE.

JOHN R. POWELL AND WILLIAM D. LEWIS, OF PLYMOUTH, PENNSYLVANIA.

MINING-DRILL.

SPECIFICATION forming part of Letters Patent N 0'. 358,479, dated March 1, 1887.

(No model.)

To all whom, it may concern.-

Be it known that we, JOHN R. POWELL, a citizen of the United States, and WILLIAM D. LEWIS, a subject of the Queen of Great Britain, residing at Plymouth, in the county of Luzerne and State of Pennsylvania, have invented a new and useful Improvement in Mining-Drills for Coal and Rock, of which the following is a specification.

Our invention relates to improvements in mining-drills for coal and rock; and it consists of the peculiar construction and arrangement of the, various parts for service, and in the novel combination of devices, substantially as hereinafter fully set forth, and particularly pointed out in the claims.

Heretofore in this art it has been proposed to provide a mining-drill for drilling rock and coal with toothed jaws for entering an aperture or opening formed in the rock, &c. to hold the frame and the drill steadily in position. In some of these devices the jaws of the drill-frame are provided with an adjustingbolt and binding-nuts which pass through the jaws; but in the practical use of a drill embodying this construction only one of the jaws is separated from the other and forced into the apertures or interstices of the-rock or coal, while the other jaw is free and does not enter the coal, &c so that it is liable to turn or rotate partially, whereby the drill is insecurely held in place and the drill is liable to cut untrue.

VVe are also aware that the togthed holdingjaws of a mining-drill have been hinged or pivotally connected together, and a wedge or key driven into or between the jaws to separate them; but in this device it is very difficult and tedious to withdraw the key or wedge from between the jaws when the operation of drilling has been completed, so that the apparatus can be removed or displaced; and weare further aware that the toothed jaws of a mining-drill have been pivotally supported at their middle by vertical plates and through one of the ends of these jaws is passed an adjusting-bolt having a binding-nut, and in this case the jaws do not forma supportand guide for the drill and its feed-shaft, which passes above the jaws and exterior thereto.

The primary object of our invention is to provide an improved miningdrill for drilling rock and coal with laterally-expansible jaws, which are forced apart or moved in opposite directions simultaneously by novel and peculiar means, said jaws forming a guide and support for the auger or drill and its feed-shaft, and having sufficient elasticity to normally hold them in contact or engagement-with the adjusting devices, so that they shall be ready at all times for instant use or adjustment. By this construction and arrangement of the jaws and their adjusting device we provide means which can be rapidly and easily adjusted to retain or hold the drill very firmly and rigidly in place, and at the same time provide a secure support and guide for the drill and its feed-shaft.

A further object ofourinvention is to provide a firm and secure support for the threaded bearing of the feed-shaft for the auger or drill, which bearing shall not be liable to turn or rotate on the drill-frame and throw the auger and its feed-shaft out of line.

In the accompanying drawings, which i11ustrate a mining-drill embodying our invention, Figure 1 is a perspective view. Fig. 2 is a plan view showing the jaws expanded in dot ted lines. Fig. 3 is a vertical transverse sectional view on the line y y of Fig. 2. Fig. 4 is a detached perspective view of the bracket or support for the threaded box or bearing of the feed-shaft. Fig. 5 is a detail View of our preferred form of wrench for simultaneously turning the adjusting-nuts. Fig.6 is a crosssectional view on the line at m, Fig. 2.

Referring to the drawings, in which like letters of reference denote corresponding parts in all the figures, A and B designate the expansible jaws of the supporting-frame of a mining-drill constructed in accordance with our invention. These jaws are arranged side by side and parallel with each other, or substantially so, and they are made of steel, iron, or other material of sufficient elasticity to adapt them to yield or move laterally of each other and yet retain sufficient strength to withstand the strain and wear that comes upon the apparatus when in practical use. The front ends of these expansible jaws AB are bent or inclined inwardly toward each other to form the shoulders or flanges a, and the said ends of the jaws are further bent to form the extensions b, that lie in close proximity to each other and have their inner opposing faces or sides hollowed or curved out to form the support and guide 0 for the drill or anger and its feed-shaft, presently described. The guideC is thus formed or made integral with the jaws, and thereby strengthened and rendered more durable, and the extensions b, that form the guides, are adapted to move laterally of each other with their respective jaws, so as to cause their spurs or teeth 0 to take or enter into the interstices or apertures formed in the sides of the aperture or opening which is cut in the wall of rock or coal by a pick or other suitable implement preparatory to introducing the extensions 1) of the jaws therein, as is obvious. These teeth or spurs are formed separate and secured to the extensions or guide, or they may be formed in one piece therewith, and they are adapted to take in the interstices of the wall that forms the opening, so that thejaws which form the drill-frame are very securely and rigidly held in place, and thereby prevented from becoming detached.

D designates a supplemental or auxiliary guide for the drill or anger and its feed-shaft, which is made in the form of an annulus or ring to permit the said auger and shaft to pass freely and readily therethrough. This guide D is located or arranged in a vertical position near the front part of the frame or the jaws thereof and in rear of the shoulders thereon; and this guide is provided with outwardlyextended arms E E, which are arranged on opposite sides of the guide and enter or pass through openings 0, formed in the jaws A B, as shown. These arms are made of angular form in cross-section, preferably square, and the openings 0 therefor are made of corresponding shape so that the lugs or arms are prevented from rotating or turning,whereby the guide is heldin its proper vertical position and in line with the guide 0, so that the drill and its shaft can pass freely through both of the guides C D, as is obvious. These arms or lugs E E are threaded exteriorly, as shown, and the said threads run or incline in opposite directions, the one to the right and the other to the left, so that when thenuts F thereon are turned they move in same direction by means of our preferred form of wrench, (shown in Fig. 5,) and actuate the jaws A B simultaneously, whereby the teeth or spurs on the extensions I) of the j aws are caused to take into the interstices of the opening in the wall, and engage the same to an equal extent to very firmly hold the jaws in place. The nuts F on the right and left hand threaded arms or lugs of the guides bear against the inner opposing sides of the expansible jaws, which are normally in contact or engagement with the nuts by rcason of their inherent elasticity, so that the device is in position or condition for instant use at all times, and the nuts F are adapted to be rotated simultaneously and in the same directions by means of a wrench or other suitable implement, our preferred form of which is shown in detail in Fig. 5 of the drawings, although any other desired implement can be employed.

It will be seen that when the nuts are rotated or turned by the wrench to cause them tomove in one direction, they will bear against and force the jaws away from each other simultaneously without turning or rotating the supplemental guide D for the auger-shaft, which is prevented from movement by reason of the angular lugs or arms E E being fitted snugly or closely in the openings 6 provided therefor. \Vhen the nuts are turned in one direction,

, they force the jaws and their extensions 7) apart and cause the spurs or teeth to take firmly into the wall, and when thenuts are rotated in the reverse direction the inherent elasticityin the jaws closes them together and upon the nuts, so that the spurs or teeth are withdrawn from the wall, and the extensions a collapse to permit the apparatus to be easily and readily removed.

The rear ends of the expansible jaws that form the frame of the drill are provided with enlargements g, which are formed integral with the jaws by swagtng the upper rear sides of the jaws, and on these right-angled flanges g rests the bracketor support G for the bushing or box of the feed-shalt of the drill. This bracket G comprises the side plates, 71/, which bearand rest on the flanges g of the drill-frame, and are secured firmly and rigidly thereto by means of the throughbolts h, which pass through aligned openings in the flanges g and the plates h. The bracket G is provided, further, at one side with the upwardly-extended integral ears or lugs i, and on its oppositeside with a single perforated ear or lug, 1?, for a purpose presently described.

I designates a sectional box or hearing for the feed-shaft J, that carries the drill or anger J at its front end, the said feed-shaft being exteriorly threaded, and both it and the anger or drill being of the ordinary or any preferred pattern. One part or section of the box or bearing is formed in a single piece with the bracket or support G between the lugs i and z" thereof, and the other part or section of the bearing is formed in a single piece with the cap-plate K, the said parts or sections being interiorly threaded and adapted to align or register with each other to permit the threaded periphery of the feed-shaft to engage the threads therein and be fed thereby when it is rotatedas, for instance, by a crank or other suitable lever or device, L, affixed to the shaft at one end, as shown herein. The cap-plate K is provided at one end with lugs or ears 7., which have transverse openings formed therein, and said ears are fitted. between the lugsi of the bracket G, and the openings therein align with similar openings in the said lugs i, so that a shaft or pin can be passed therethrough to cured to the jaws, the sectional box or bearpivotally connect the bracket and cap-plates together, as will be very readily understood. The opposite or free edge of the cap-plate has a slot or opening, k, formed therein, and through this slot passes the lug i, so that a pin or key, m, can secure the free end of the cap-plate and the bracket together detachably, whereby the cap-plate can be elevated or turned on its pivot to adapt the feed-shaft to be removed or adjusted, as is obvious. The pin or key m is confined-to the cap-plate or other suitable part of the apparatus by means of a chain, rope, or other suitable connection, so that it is not liable to become detached. By means of the bracket-plate bearing on the right-angled lugs or flanges of the jaws a very firm and secure support is provided for the said bracket, so that itis not liable to become easily detached or displaced and throw the box or bearing I out of line with the guides O D. The jaws are adapted to yield 'or spring from the point or line where the first of the throughbolts connects the bracket G to the jaws. The feed-shaft passes and works through the threaded box or bearing I provided therefor, so that the drill or anger is fed forward at a proper rate, and the drill passes through the guides O D, and is thereby correctly and properly guided and supported in place.

The operation of our invention will be readily understood from the foregoing description, taken in connection with the accompanying drawings.

By making the expansible jaws A B the basis for the drill-frame we are enabled to provide a drill which possesses superior advantages in points of strength, simplicity, durability, and cheapuess over all others that have preceded it, and the supplemental guide D and the means for adjusting the jaws are likewise simple and strong in construction, effective, and rapidly operated, as well as cheap.

Slight changes in the form and proportion of parts can be made without departing from the spirit of our invention.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent. is

1. In a mining'drill, the combination of the expansible jaws provided with the guide at their front ends and which is movable with the same, an auxiliary guide arranged in line with the guide of the jaws and having the right and left hand threaded studs fitted in openings in the jaws, and the adj usting-nuts fitted on the studs and bearing against the opposing sides of the jaws, the said nuts being capable of rotary movement on the studs to move the jaws in reverse direction, substantially as described, for the purpose set forth.

2. In a mining-drill, the combination of the expansible jaws adapted to be actuated simultaneously in opposite directions and having the right-angled flanges at their rear ends, the bracket-plate resting on the flanges and seing, the guide D at the front of the jaws and having the right and left hand threaded lugs supported in thejaws, the adjusting-nuts fitted on the lugs and bearing against thejaws, and the feed shaft carrying an anger, substantially as described.

3. The combination of the expansible jaws having the openings therein, the guide D, provided with the threaded lugs or arms substantially square in cross-section and fitted snugly in the openings of the jaws, the adjustable nuts fitted on the lugs and impinging against the jaws to actuate the same simultaneously, the feed-shaft, and the auger carried by the said shaft, substantially as described.

4. In a mining-drill, the combination of the laterally-expansible jaws provided with the extensions at their front ends to form the guide C and having the projecting teeth or spurs on the outer surfaces of the said extensions, the supplemental guide D, arranged in line with the front guide, 0, and having the right and left hand threaded square studs fitting in aligned openings in the said jaws to prevent displacement of the supplemental guide, the nuts fitted and working in opposite directions on the said threaded lugs and bearing against the opposing sides of the jaws, a fixed threaded bearing arranged upon thejaws in rear of and in line with the front and supplemental guides G D, the feed-shaft working in the fixed threaded bearing, and the drill or anger connected with the feed-shalt and passing through the aligned front and supplemental guides, substantially as described, for the purpose set forth.

5. In a mining-drill, the combination of the expansiblejaws having the guide at their front ends, a supplemental guide arranged and held in line with the guide of the arms and provided with the threaded lugs supported in the arms, the adjusting-nuts movable in opposite directions on the lugs and bearing against the jaws to actuate them simultaneously in opposite directions, the feed-shaft, and the auger passing through the guide of the jaws and the supplemental guide, substantially as described.

6. In a mining-drill, the combination of the expansible jaws forming the drill-frame and having the integral extensions 1) at their front ends, provided with the inner rounded faces and the toothed periphery, the supplemental guide arranged in line with the opening or passage formed by the rounded faces of the extensions and having the threaded lugs supported in the jaws, the nuts fitted on the lugs, the bracket-plate resting on and secured to flanges or ledges of the drill-frame, the capplate pivotally connected with the bracket, the sectional box or bearing, the feed-shaft, and the auger ordrill, substantially as described. i

7. In a mining-drill, the combination, with the expansiblej aws, of the oppositely-th readed In testimony that we claim the foregoing as 10 studs or shaft fitted in the jaws, and the nuts our own we have hereto aflixed our signatures fitted 0n the oppositely-threaded portions of in presence of two witnesses.

the studs or shaft and impinging against the 5 opposing sides of the jaws, the nuts being capable of rotation in the same direetionsi- I muitaneously to force the jaws in opposite directions, substantially as described, for the purpose set forth.

\Vitnesses:

W. P. DAVIS, J AMES \VARD.