US94097A - Improved stone-drilling machine - Google Patents

Description

dinard ,iair

Josera P. FRIZELL,

OF KEOKUK, IOVA.

LettersaPateut No. 94,097, dated-August 24, 1869.

IMPRQVIEID STONE-DRILLING- MACHINE.

The Schedule referred to `in these Letters Patent and making part ofthe same.

To all persons to 'whom these presents may' come:

Berit known that I, JOSEPH l. FRIZELL, of Keokuk, ot' the county of Lee, and State of Iowa, have made a new and useful invention, having reference to Automatic Machinery for Drilling Stone and do hereby declare the same to be-fully described in the following specitication, and represented in the accompanying drawings, of which- Figure l is an elevation of the steam-engine cylinder and its appendages, with the drill-ratchet, and a portion ofthe drill.

Figure 2 is a rear elevation of the machine.

Figure 3 is a top View ofthe drill-head and ratchet.

Figure 4 is a vertical section, taken through the engine-cylinder, andthe valves-thereof.

Figure 5 is a 'ont elevation of the machine.

Figure 6 is a side elevation of it. g

The frame of the machine is shown at A, as composed of two parallel bars, a a., united at then upper" and lower endsby two .pairs ot' cross-'bars or connections, b. v

This frame, at its lower end, is provided with two spurs or pointed feet,'cc, to support it on a rock o1;t surface while the. machine may be in ',operation. -It also has a pointed brace-bar, d, jointed to ,its vupper part, such serving to maintain the frame either at any desirable inclination, or in a vertical position, asV cir cumstances may-require.

A steam-engine cylinder, B, provided with a piston, C, is applied to the frame A by fui-cated guides, e e, so as to be capable of beingmoved lengthwise and rectilinearly within it. One of the forked guides e e of the cylinder carries a pinion, f, to engage witha rack, y, or range of teeth, fixed to the outer side of one ofthe longer bars of the frame A.

The shaft h of such pinion is supported in bearings v in the forked guide, and goes through a toothed wheel,

li, lixed to 011e side ofthe said guide.

A crank, 7:, fastened on the said shaft, has a rectangularI lever or pawl, Z, pivoted to it, and arranged, with respect to it, in manuel' as represented, particu-A larly in Figure 7, which denotes asection of the crank, the pawl, and the wheel. The pawl plays through the crank, and is held in engagement with the wheel by means of a spring, P, alijxcd tothe handle lm of the crank, and bearing against the handle u of the pawl. By iirml y grasping both handles by the hand, the pawl may be moved out of engagement with the wheel; but, while the two are in engagement, the cylinder will be held from descending or being moved within the frame 'The drill, shown at D, is arranged in a straight line with the piston, and is connected therewith by means of the drill-head E, keyed both to the piston and drill,

and provided with a ratchet, 11.

During the np-strokeof the piston, the drill will be partially revolved by means of-a long spring-cammed bar, F, extending down iioni the cylinder, and sprung againstthe periphery ofthe ratchet.

lVhile the ratchet may be rising with the, piston, a tooth of the ratchet will be borne against the cam-part y of the spring-cannn'ed bar F, which will cause the vratchet to turn a little, and thus simultaneously turn the piston and the drill.

A straight elastic guide or ratchet-retainer, 7, (see figs. 2 and 6,) extending down from the cylinder, is sprung against the ratchet, and serves as a retainingpawl, to prevent it from turning backward. It also allows the free up-an d-down movements of the ratchet.

The cam g should be made the hypothenuse of a triangle, having a base longer than the length of a tooth ot' the ratchet, the same being so as Ato enable thecam, during a descent of the ratchet, to slip off the tooth against which it may be forced,and to come into a position to act `against the front edge of the tooth during the next or upward movement of the ratchet.

The part E is to press as a spring against the ratchet. The same may be said with reference tothe retainer lr. Alongside of the cylinder, is a valve-case, G, which consists simply of a tube, open `at each end, and com-V municating lwith the cylinder by two passages or ports, s t, each ot' which opens into the cylinder at a short distance from its next adjacent head. he valves are shown at a and n as being simple piston-heads, axed to a rod, u', and having a diameter corresponding with the boreof the valve-case.

The valve-rod, below the case, has three bends, lw1 x y, and extends between theretainer lrand a parallel guide, z, arranged as represented. The lower parts j j, oi' such retainer and guide,are made as jaws, to grasp the valve-rod with a suliicient force to keep it il'rin dropping downward by its own weight, and thev To this end, the retainer and weight of its valves. guide are to be made sutliciently elastic to compress the jaws with the propel' degree of force, on the valvestem.

The parts alb* of the valve-rod constitute shoulders for the ratchet 1J to act against, in order to give motion to the valve-rod, to cause -it to carry eachot' the valves both above and below its next adjacent port.

There isV an induction-opening, c, leading into the middle of the valve-case. This opening is to be'connected with a steam-generator, by a flexible hose or pipe, provided with a stop-cock.

The drill works through a guide, H, which rests on thel lower bars ofthe frame A, and is held theietoby spring-catches, C2 Ci, extending downward from it, and applied to the two bars, in manner as represented in Figure 8, which is a transverse section of the bars and the guide, with the drill going through the latter.

The mode of operation of the machine may be thus explained:

If we suppose each of the two valves u fu to be raised above its co-operative part, and the piston-head of the cylinder to be a little below the entrance of the upper port into the cylinder, steam will flow into the upper part of the cylinder and depress the piston. During the descent of the piston, the valves will be moved downward to their lowest positions, and the steam will iiow into the lower part of the cylinder, and elevate the piston, the exhaust steam escaping through the upper port, and out of the upper end of the valve-case.

During the-ascent of the piston, the valves will be raised, and each will pass beyond its co-operative port before the piston-head gets by the upper port. This will let into the upper end of the cylinder a quant-ity of steam, which will serve to cushion the piston, as well as to subsequently drive it back past the port. The steam entering the cylinder will operate on the piston and depress it.

When the machine is at work, performing the operation of drilling into a rock, the piston will not be cushioned at the terminus of its down-stroke, it being arrested in its descent by the drill striking the rock; but, when the piston is not Aso arrested, the cushioning at the terminus of the down-stroke takes place, as before, with the 11p-stroke. Ordinarily, the drill commences to strike the rock just after the ratchet may have struck the lower shoulder of the. valve-rod. The

concussion between the ratchet and shoulder will causel the valves to be thrown into the position for the steani 'to effect the up-stroke of the piston.

Thus, it will be seen that I have. a peculiar valvemechanism, by which the waste or exhaust steam is discharged at opposite ends of the'valve-case, and the piston is cushioned at the terminus of each stroke.

I would remark that I make no claim to the combination of a drill with the piston of a steam-engine, and `with mechanism for revolving such drill,'the whole being so as to cause the drill to be moved rectilinea-rly by the piston, and to be revolved more or lessV in the mean time.

What I claim as my invention, with referenceto an automatic drilling-machine of such kind, is as follows:

The arrangement and combination of the frictionjaws j j with the valve-rod, its valves, and operative mechanism applied to it, and the cylinder and piston, asA specified. v

Also, the combination and arrangement of the elastic retainer r, and cammed bar F, with the cylinder, and the. ratchet of the piston, and drill-shaft, as set forth.

Also, the arrangement and combination of the bent lever, pawl l, the spring P, and thc stationary gear fi,

with the ,crank 7.', its shaft h, and thepinion f, and

the rack g, for effecting the longitudinal `movement ofv the steam-en gine within the frame of tlle machine.

JOSEPH P. FldZELL.

Witnesses:

H. SCOTT HOWELL, E. W. HASKETT.

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