US87162A - Improved rock-drilling machine - Google Patents

Description

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PHOTO-LITMOGHAPHER. WASHINGYON. D Cv N. PETERS.

t tant @tijd -Mwwww- SAIVIUEL GABL'E, QF MILLERSTOWN, PENNSYLVANIA. Letters Patent' No. 87,162, dated February 23, 1869;

IMPROVED RCK-DRILLING MACHINE.

Thev Schedule referred to in these Letters Patent and making part of the same.

To all whom it mag) concern:

Be it known that I, SAMUEL GABLn, otlvlillerstown, in the county ofPerry, and State of Pennsylvania, have invented new an d useful Improvements in Rock-Drilling Machines; and I do hereby declare that the following is afull, clear,and exact description thereof, which will enablethose skilled in the art to make and use the same,

reference being had to the accompanying drawings,form- Vented from turning, and the fron-t end oi' the guideplate kept in the proper position with reference to the cam-rollers by which the drill is lifted.

In the drawings- A A are two uprights, connected by cross-braces B B, and

C C are the cross-pieces, and

D, the uprights of a rectangular frame, sliding Within the general frame A B, as shown.v

The uprights D are formed with tongues, l, which slide freely in grooves, g, in the proximate faces ofthe uprights A, as shown, thus affording the means of guiding the frame Ci D.

The drill-stock M slides freely in the irons P, which latter contain friction-rollers, d, and are atiixed to the cross-pieces C ofthe sliding frame.

N is the drill7 and is aliixed, by means of a socket and set-screw, to the drill-stock.-

The drill passes through a horizontal plate of metal, G; andthe ratchet-disk It, 011 the drill-stock, is within the bent plate j, which latter passes over the said disk, each end being ailixed to the plate G.

The drill-stock 'passes through this bent plate also.

A curved spring, J, exerts its tension on the top of the plate f, and serves to actuate the drill downward with force at each stroke.

This `spring is aliixed, as shown, to the upper crosspiece of the sliding frame, and its free end impinges on the plate f, just over the stud n, projecting downward from the said plate f, as shown.

a is a pawl, pivoted to the sliding frame, and actuated by a spring, b, to' bear its free end down upon the ratchet-toothed face of the disk It, sothat, at each upward movement of the drill-stock, the disk will be carried around one or more teeth, thus causing the edge of 'the drill to be presented at a different angle from the preceding stroke.

Thespring also prevents the drill from rebounding, thus obtaining a more effective stroke, or dead-stroke.

e is a pawl and its spring, which serves to prevent the disk from rotating backward.

The weightof the drill-stock and drill is sustained on two or more studs, 'm m, projecting upward from the plate G, in contact with the lower face of the disk, as shown. f

nis the upper` stud, or hardy, sol called, which transmits the i'orce of the spring J to the drill-stock, through the disk R.

The drill is liited by means o f a double cam, consisting of two rollers, It h., the reduced ends of which are afforded bearings in the arm-plates K, mounted on the crank-shaft L, one end of which latterterminates in a hand-crank, Q.

This shaft L is aiforded `bearings in the arms lE, which pass through mortises in the uprights D of the sliding frame, and are held iirnily in said mortises by means of keys or wedges t.

The rear projections oi' these arms E afford attachment i'or the cross-plate I, from which rises the slotted guide-plate H, for steadying plateG, the rear end of this latter plate being recessed, to t in the'slot, and be guided by the same.

The sliding frame is adjustable up or down, according to the depth of the hole made by the drill, and is held at any one of several positions by means of a notched plat-e,r T, pivoted to the upper cross-piece C, whereby any one ofthe notches of the said plate may be caught on the stud t, projecting from the nppe cross-brace B.

j is a stop, to hold up the pawl a Vwhen it is desired that the drill shall not rotate.

Then the crank Q is turned, the rollers (l successively encounter the projecting end ofthe plate G, thus raising the drill-stock in its guides, and allowing the same to fall as the rollers pass from contact with it.

'Ihe lower ends of the uprights A are provided -with iron points, in order to givev the machine .a suitable foothold on the rock or ground; and

S is along iron braceor shore, pivoted to the upper part of the frame A B, which acts .in conjunction with the said iron points, in holding the frame A B in 'the proper upright position. g

Ihe free end of this shore S rests' on the ground.

rIhe above isa general description of a rock-drilling machine embracing my invention, which consists in combining the slotted guide-plate H with the plate G and sliding frame 0 D, for the purpose of providing a simple means for holding the plate G from turning during the operation of the drill, and, at the same time, keeping` its front end in the proper relation to the cani-rollers hI h.

I claim as new, and desire to secure by Letters Patent- The slotted guide-plate H, in combination with the plate G and sliding trame C D of a rock-drilling machine, substantially as and for the purpose herein shown' and described.

SAMUEL GABLE.

IVitnesses WILLIAM. STAHL, 'Hanni' Sownns.

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