US41913A - Joseph s - Google Patents

Description

UNITEDl Sstara's- PATENT Ormea.,

JOSEPH S. FOSTER, OF VIRGINIA, NVAD A.

Specifica-tion forming part of Letters `Patent o. 4 1,913, dated March l5, 1864.

To all whom it may concern.'

Be it known that l, JOSEPH S. FOSTER, of Virginia, in the county of Storey and Territory of Nevada, have invented anew and Improved Rock-Drilling Machine; and I do hereby declare that the followingr is a full, clear, and exact description of the same, reference bey ing had to the accompanying drawings, making a part of this specification, in which- Figure l is ahorizontal section of my invention taken in the line .r x, Fig. 2; Fig. 2, a vertical section of the same taken in the line y y, Fig. l 5 Fig. 3, a detached face view of a wheel and spring pertaining to the same.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to an improved device for holding the drill and rotating the same, and also for adjusting the drill in a more or less inclined position, as may be required.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

Arepresents what may be termed the bed 7 of the machine, ot' triangular form, and having three set-screws, B B B, passing through it, one near each angle, as shown in Fig. 1. At each angle of the bed A there is a socket or mortise, a, to receive the lower ends of bars (l. These bars C may be of square or quadrilateral form in their transverse section, and they have an inclined position, as shown in Fig. 2. Each bar, U, has a slide, D, fitted upon it, and through each slide D a screwrod, E, passes, said screw-rods being parallel with the bars (l and working in bearings b at the upper ends of the bars C. The slides D mayl be raised and lowered on the bars (l by turning the screw-rods E.

In the upper surface of the bed A there is made a recess to receive a plate, F, said plate being secured in the recess by buttons b. The plate F hastwo curved standards, c c, attached to it, the upper ends of which are connected by a cross-plate, Gr, in which the upper end of a tube, H, is litted and allowed to turn The lower end of the tube H is fitted in the plate F, and the interior of said tube is of square forni, to admit of a square drill-rod, I, being fitted in it, said drill-rod passing through a hole, d, in the bed A, and having the drill J secured in its lower end by a screw, e. (See Fig. 2.) f

K is a shaft, which is fitted in bearings f, attached to the outer side of the tube H'. The shaft K is at right angles with the tube H, and said shaft has a pinion, L,'upon it, which works in a mortise in the tube H and gears into a rack, M, atone side of the drill-rod I. N is a pawl, which is attached to the tube H and engages with the pinion L, said pawl admitting ofbuta slight upward movem'ent of the drill-rod I, but admitting of any length of downward movement of the same.

0n the outer end of the shaft K there is placed loosely a bevel-toothed wheel, O, which gears into a bevel-wheel, P, on the plate E, the wheel P being concentric with the tube H. To the outer end of the shaft K there is attached a spring, Q, the end of which is f1tted between projections g g, attached to the outer side ofthe wheel O.

The operation is as follows: The drill J is placed over the spot where the hole is to be bored, and the machine is retained or held in proper position by adjusting the slides D to the proper height on the bars C, said slides D bearing against the sides of the tunnel or opening of the excavation, and when adjusted secured in position in the bars O by set-screws h. rIhe drill may be made to work in a vertical or more or less inclined position by adjusting the set-screws B. The top of the drill-rod I is then. struck and driven down the drill J, operating upon the rock. As the rod I is driven down the shaft K is turned, through the medium of the rack M and pinion Il, the wheel remaining stationary, or turning but little, and lthe spring Q isbent or curved in consequence of the turning of the shaft K. As soon as the drillrod I has recovered from the blow, the spring Q raises the drill-rod I as far as the pawl N will admit, and this upward movement of the drill-rod carries the drill J above or free from the rock, and the spring Q is then allowed to turn the wheel O, which, in consequence of gearing into the wheel P, turns the tube H, and consequently the drill-rod I and drill J. It will be seen from the above description that the wheel O is not turned materially when the drill-rod I is driven downward in consequence of the drill coming quickly in Contact `with the rock. Then it is necessary ranged to operate in the nianner substantially to spoon out the hole inside by the drill the as and for the purpose set forth.

plate E, with all the parts zittaehed, are re- 2. The combination of the' bed A, plate F,

moved by turning the buttons b, the bed A vsetserews B, slides D, tube I-I, drill-rod I, not being disturbed. wheels O l), pawl N, shaft K, and spring` Q,

Having thus described my invention, what all arranged to forni a new and improved de- I claim as new, and desire to secure by Letvice, for the purpose specified.

ters Patent, is- JOSEPH S. FOSTER.

1. The tube II with the drill-rod Uitted with `Witnesses: in it, in combination with the mok M, pinion JOHN D. CRAM,

L, pawl N, wheels 0 P, and spring Q., all ar- PETER N. RYAN.

Images