US1065060A - Flexible-foot supporting-column for rock-drilling engines. - Google Patents

Description

J. G. LEYNEB.. FLEXIBLE FOOT SUPPORTING COLUMN POR ROCK DRILLING ENGINES.

\ I APPLICATION PILEDDEO. 12, 1911. 1,065,060.,

Patented June 17, 1913.

2 SHEETS-SHEET 1.

J. G. LEYNER. FLEXIBLE FOOT SUPPORTING COLUMN FOR, ROCK DRILLING ENGINES.

APPLICATION FILED DEO.1Z, 1911.

' Patented June 17, 1913.

2 SHEETS-SHEET 2.

T `1 sTATns PA JOHN'GEORGE LEYNER, 0F DENVER, COLORADO.

ien.

FLEXIBLE-FOOT SUPPORTING-COLUMN FOR ROCK-DRILLING ENGINES.

Specidation of Letters Patent.

' Patented June 17, 1913.

Application mea December iz, 1911. 4serial No. 665,330.

vention are: first, to 'provide a flexible footcolumn for supporting rockedrilling engines in rock tunnels and in the shaft-s, stopes, drifts, and other workings of mines. Second, to rovide a supporting column for rock drilv ing engines, that is provided with an automatically tilting and an angular uneven surface engaging foot portion that is removably secured tothe column by a resiliently yielding connection. I attain these objects by the mechanism illustrated in the accompanying drawings, in which:

Figure 1 is a vertical sectional view of the improved column, Fig-2 is a top view of the adjustable foot, detached, Fig. Sis a bottom view of the same, Fig. 4 is a transverse vertical sectional view of the foot, Fig. 5 is a bottom view of the plu in the lower end of the column, which 1s a apted to rest in the adjustable foot, Fig. 6 is a side elevation thereof, Fig. 7 is a top, plan view of the abutment nut at the upper end of the column, Fig. 8 is a vertical sectional view illustrating the lower end of a modification in the form of column, the plug' being dispensed with and the lower end of the column being pyramide-l in form, Fig. 9 is a bottom view of an end of the column shown in Fig. 8; and Fig. 10 is a view showing an improved column in position with rock drilling ,engine mounted thereon in operative position.

Referring to the accompanying drawings, the numeral 1 designates a piece of pipe ory .to the' pipe by any suitable means, preferably by a pin 5, which is extended through the plpe and plug nut and is riveted to the pipe. This plug nut is provided with an axial threaded aperture 6, in which one end of a threaded rod'7 fits and extends through the nut into the pipe a short distance. Thisv threaded rod I term the extension adjustment screw. The opposite end of this threaded rod is provided with an enlarged collar portion 8, through which right-angled apertures 9 are formed, that are. adapted to receive loosely a lever pin, by which the threaded rod may be turned to screw it into or out of the pipe. This apertured turning lever receiving collar portion is formed adjacent to the extreme adjacent end of the threaded rod, which is of smaller diameter than the collar, the adjacent side of which forms a shoulder, and on this extreme end of the threaded rod aflat faced pivotal abutment engaging point 10 is placed, and is secured thereon by a set-screw 10A, which extends thro-ugh the flat point into a circumferential recess 11, formed in the end of the threaded rod, which permits t-he flat head to 'turn rotatably on the end of the adjustable screw. The liat end of this iat point is provided With a plurality of hisel-shaped teeth 12, to enable the end to be indented in walls or other abutment surfaces, and thus secure and prevent the end against slipping movement when screwed tightly against the wall or an abutment surface and under the weight and jar. of a drilling engine in operation. The opposite end of this column pipe is convergingly pointed, enough to form a chamfered portion 13, which terminates in a closed flat faced end, in which an axial bolt receiving aperture 14 extends. This chamfered bolt receiving end of the columns pipe member may be formed on the end of the pipemember as an integral part of it, as shown in Figq8, o-r it may be, and

preferably is made in the form of an attachable and detachable steel end piece 15, which is preferably made of cast steel,VV but which may be of any hard metal adapted 'to take the Wear of the flexible foot 16, if desired, as Will be hereinafter described. This removable end piece comprises a plug having a hollow or tubular reduced and shouldered end 17, that fits the inside end of the f polygonal lform in cross section. This square pipe and extends into it up against its shoulder, and is secured to the pipe by any suitable means, preferably by a pin 18, which is extended' through the reduced end portion 'of the plug and the pipe and isriveted to the pipe. The outer end of this plug end piece is provided with a convergingly solid and closed tapered or chainfered end portion 19, which terminates in a fiat face end, in which an axial bolt receiving aperture 20 is formed.v

The reduced end portion of this plug end piece being-hollow and chambered out down into the chamfered and tapered end thereof,

ythis axial aperture 20 opens into the chamber and hollow end portion of the ,end piece. It is essential that this column pipe be held fixed and rigid, and against any turnin or rotation movement; consequently this en; piece is preferably made square in crosssection, although it may be of any other tapered end of the column is arranged to be connected by a flexible connection to the foot vplate 16, which is .preferably formed and.

arranged as follows: The taper end of the pipe extends into a square recess 21, the top sides of which are convergingly beveled to form a bearing for the sides of the taper point of the pipe, While the bottom portion v recess 21 is formed.

Through the foot plate abolt receiving apture 24 is formed, which extends through it from the -center of the recess 21,. A recess 25 is also formed in the bottom of the foot plate concentric with the a erture 24,'Which is made deep enough to inclose a nut 26, below the bottom surface ofthe foot. A. bolt 27 is extended from the inside of' the adjacent end of the pipe loosely through its.

aperture 20, and through the aperture 24 of the foot plate, and the nut 26 is threaded to its end. This bolt 27 is made long enough to receive an expansion spring 28, of lample length ,y and resiliency to permit the foqt plate to tilt by sliding 'up on one side of the tapered end of thel pipe and down on its opposite side without disengagement from the end of the pipe, and the sprlng automati-r cally returns the foot plate to its central and right-angled position on the end of the pipe when thev foot plate is released from any angular position which it assumes relative to the position ofthe pipe when set in an operposition ative position in a tunnel, shaft, drift, or other stone workings. I preferably use for this purpose a square wire form of spring, one end of which bears against a washer 29, that is placed on the bolt belou7 its head, and the other end of the spring bears against the end of pipe or of its removable end piece. A

vwasher 30 is also preferably placed on the bolt between the nut and the foot plate. The expansive force of the spring draws the nuty 26V up against the bottom of the foot plate, and forces the tapered end of the pipe down into and against the top edge sides of the recess in the foot plate, and at the same time clamps the foot plate with a resilient yielding pressure against and to the tapered end of the pipe. The bottom surface of the foot plate is provided with any suitable arrangement of projecting chisel-shaped lugs or teeth, which are arranged to be indented into the rock and are adapted to hold the foot plate from slipping from set positions.

, The operation of my flexible foot columns for supporting rock drilling engines is as follows: rIhe column is adapted to be set in horizontalor vertical or horizontally or vertically disposed or angular positions in tunnels, shafts, drifts, or other rock working rock-work tunnels, and the fo'ot plate is first placed in position where desired, against a yopenings .of mines, railroad, or irrigation block of wood, and owin to its flexible connection with the end o the pipe, it automatically adjusts itself to theTuneven surface of thefloor or roof or Wall of the Working against' which it is placed. The operator then directs and centers the abutment point of theadjustable screw at the opposite end of the pipe, also against a block of wood, and screws it with a lever rod inserted in .the apertures ofthe screw tightly against the opposing surface of the workings,` in the he desires'to set the column, and thus braces and secures it rigidly. mounts on it a rock drilling engine, by means of a chuck which is illustrate in Fig.

He then 10 and which is attached to the rock drilling v engine and is adapted to be clamped around the pipev of the column,v and-as the plpe 1S round and is held against rotary movement yby its square end being inserted in the square aperture of the foot plate, it cannot turn',

and .it permits the drilling engine to be clamped to it in any desired position. T0 loosen the column it is only necessary to unscrew the threaded rod. The flexible foot plate, owing to its automatic action in finding a bearing for itself, enables the column to be quickly and very firmly and rigidly vset up by operators in 'rock workings the surfaces of which, owing to the rock being blasted out, are rough, jagged, and uneven. While I have illustrated and described the preferred construction and arrangement of my improved flexible foot column, I do not wish to be confined to the construction and arrangement shown, as many changes might be made without departing from the spirit of my invention.

Having described my invention, what I claim as new -and desire to secure by Letters Patent, is:

l. A column for supporting rock drilling engines, comprising a piece of pipe, and an abutment engaging portion adjustably -secured within one end of said pipe, said pipe having its opposite end provided with a convergingly tapering polygonal form of end terminating in a fiat faced end provided with an axial aperture, a bolt within the tapered end of said pipe extending through and beyond the aperture in the endof said ipe, and an expansive spring mounted on said bolt within the end of said pipe and with a foot plate provided with a polygonal recess and a clearance space and arranged to it slida'bly over and against the sides of the polygonal shaped end of said pipe and to tilt and rock thereon, and provided with an aperture extending throughA the bottom of said foot plate from the bottom of said recess and extending over the projecting end of said bolt, and a nut threaded to the end of said bolt and arranged to bolt said foot plate under an expansive tension pressure of said spring against the end of said pipe.

2. ln a column for supporting rock drilling engines, a Supporting bar, having an adjustable abutment engaging portion at one end, said bar being provided with a convergingly tapering polygonal shaped end portion at its opposite end, a bolt within said polygonal shaped end projecting loosely through said end, and an expansion spring mounted on said bolt, with an abutment engaging foot plate provided with a polygonal recess and a clearance. space, the upper edges of the side walls of said recess adapted to engage the sides of the convergingly tapering polygonal end of said bar in such a manner as to tilt or rock thereon, said foot plate being bolted by said bolt to said bar in such a manner that the expansive force of the spring on said bolt holds said foot plate against the end of said bar and permits it to automatically tilt when it is placed against abutment surfaces that are at an angle to the direction of said bar.

3. In a column Jfor supporting rock drilling engines, the combination of a pipe bar provided with an adjustable. abutment engaging portion at one end, said pipe bar being provided with aour sided square convergingly tapering hollow end portion at its opposite end from said screw, having a l'at terminal end provided with an aperture through it into its interior, a bolt withi it? in said tapering hollow end arranged to extend through `and beyond the saine, and

an expansive spring on said bolt between said hollow end `and the head of said bolt, an abutment engaging foot-plate, a nut lthreadedcto the bolt beyond said abutment engaging foot plate, said foot-plate' being provided with a socket recess and a clearance space in which said'pipebar is tiltably seated. v

' 4. column for rock-drilling engines, comprising a supporting tube having a converging lower portion, a foot-plate having a converging recess into which the converging portion of said tube is seated, said lower portion consisting of angularly arranged sides and the walls of said recess being correspondingly shaped 'to prevent axial rota? tion of the tube, and resilient means for maintaining said tube in engagement with said footeplate.

5. column for rock-drilling engines, comprising a supporting tube havingk a converging lower portion, a foot-plate having a converging recess into which the converging portion of said tube extends and along the upper edgeiof which said tube is seated, said recess being enlarged beneath the seat to allow movement of the end of the tube and thus permit tilting of said tube, and resilient means for maintaining said tube iii engagement with said foot-plate.

6. A column for rock-drilling engines, comprising a supporting tube having ak converging squared lower portion apertured at its. end, a foot-plate having a converging recess into which the converging portion of said tube is seated, said recess having sutilcient diameter below its upper edge to permit the movementof said squared lower portion during tilting of the tube, a bolt connecting said foot-plate and said tube through said aperture and recess, and a coiled spring interposed between the upper end of said bolt and the apertured portion of the tube for yieldingly maintaining said tube in engagement with said foot-plate.

7. A column for rock-drilling engines, comprising a supporting tube having a lower portion approximating an inverted truncated pyramid in shape, a foot-plate having a converging recess forming a seat along its upper edge for the lower portion votsa'id tube, the walls of said recess being outwardly curved in the portion of their length opposite the end of the lower portion of said tube, and means for yieldingly maintaining said tube in engagement with said foot-plate.

8.- A column for rock-drilling engines,

comprising a supporting tube having a lower portion approximating an inverted truncated pyramid in shape, and apertured at its end, a foot-plate having a converging iis recess formingr n sent along its upper edge the portion of their length opposite the end of the lower portion of said tube to permit the movement of siiid lower portion during tilting of the tube, a bolt connecting said foot-plate and said tube through said iperture and recess, and a coiled spring inter- 10 posed between the upper end of said bolt and the upertured. portion of the tube for yieldingly maintaining said tube in engagement with said foot-plate. i

In testimony whereof I eix my signature in presence of two Witnesses.

n JOHN GEORGE LEYNER.

vWitnesses: l

G, SARGENT ELLIo'rr, JESSE DrrsoN.

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