US293371A

US293371A - stevens

Info

Publication number: US293371A
Authority: US
Publication date: 1884-02-12
Anticipated expiration: 1901-02-12

Description

(No Model.) i

Y A. 85A. L. STEVENS.

STEAM ROK DRILL. N0. 293,371. Patented Feb. 1.12.1884:lr A Q F N1 NI 7g M 2o f is a perspective view ofthe brass valve-cylinivi-TED STATES Armar rrrcn.

STEAM 'ROCK-DRILL.

. SPECIFICATION forming part of Letters Patent No. 293-,3'71, dated February 12', 1884. Application filed June 27, 1883. (No model.)

To a/ZZ whom, it may concern:

Be it known that we, AMos STEVENS and ARTHUR L. Srnvns, of the city of Philadela oo `. is a cross-section of same on line t t.

phia, county of Philadelphia, and State of Pennsylvania, have invented an Improvement in Steam Rock-Drills, of which the following is a specification.

Our invention has reference to steam rockdrills and it consists in certain improvements fully set forth in the following specification, and shown in the accompanying drawings, which form part thereof.

In the drawings, Figure 1 is a sectional elevation of our improved steam rock-drill on line Fig. 2 is a cross-section of same on line z z. Fig. 3 is a cross-section of the valve mech-- anism on line y y. Fig. 4. is a section or a part of Vthe valve mechanism on line c c, especially adapted to reciprocate the main steamvalve and-vary the stroke of the drill. Fig. 5

der. Fig. 6 is a side elevation of same. Fig. 7 is a cross-section on line w m. Fig. 8 is a perspectiveview representing the steam-ports for the steam-cylinder. Fig. 9 is a cross-section on line rw w, and shows the ratchet mechanism to rotate the drill-bit. Fig. 10 is Ian elevation of the slotted cylinder by which the drill-bit is intermittently rotated. Fig. 11 is a cross-section of the drill on line s s. Fig. 12 Fig. 13

- is an elevation of the upper steam-piston removed from its piston, and Fig. 14 is a plan and elevation of the bisected ring used to hold the said upper piston from moving upon the piston-rod. A is the steam-cylinder, and is made of a casting bored entirely through, being afterward subdivided. In the middle of this cylinder I placea ring, B', and secure it in place by screws B2. 4

C is the piston-rod, and is made solid with the drillchuck 0*, one piston, C', a-nd the tapering or cam extension C G2. The'upper end of this piston-rod C is passed through the holein the ring B', which it iits nicely, andthe piston C' works in the lower chamber, B, of the cylinder A. A divided plug,-E, is then placed around the piston-rod, and its enlarged end is received in a groove, e, in the bottom of the E3, which presses against a ilange, e'.

(see Figs. i and 1i.) Then the' 1 and 12,) and is pressed in by a screw-ring, i

Facking is placed between the glands E2 and bushing E, and thereby makes a steam-tight joint. The split ring c (see Fig. 14) is placed upon the upper end ofthe piston-rod and in a groove, G3. The loose piston C2 is then placed on the piston-rod and againstthe ring c' inclosing it, and is secured in place by a pin, c2, or other equivalent device. The upper end of the cylinder A is closed by the head A', which carries the valve mechanism L, adapted to operate the main valve. projects through this head A', and is provided with a feather, OS, which works in oblique slots g in the cylinder G, which is secured to the ratchet-wheel G', free to rotate in one direction, but held from rotation in the other direction by pawls g' and springs g2. This cylinder G is supported on one end by the head A' and on the other by a case, A2, secured to said head, and is kept iu place by a packingblock, At, preferably of vulcanized ber, held in aga-inst the end of cylinder A2 by a cap, A, through which the bolts F F pass. From this it is seen that all of the parts ofthe main steamcylindervia A,E, E', A', A2,'and Ail-are held together by said boltsF alone, this greatly simplifying the construction of rock-drills gen`y erally. The cylinder A is grooved on each side to receive the guides 71l of support H2, which is provided with a` nut, H3, through which the screw H works to raise or lower the drill, the said screw being carried by an eX- tension on the cap A, and provided with a crank, H. v

b b are the, steam-ports which open from the steam-valve, and respectively extend to the tops of each cylinder or chamber B and the The cam-extension CG CT A bottom thereof, one of the latter entering the i lower chamber, B, a short distance from the bottom, as shownin dotted lines, Fig. 1,so as t'o' enable the piston to cushion on liveor exhaust IQO steam, asset forth in another pending appl-ication of ours.

I is the steam-chest, and is provided with the steam passage-way I', to which steam is admitted by a steam-valve, O, located in said passage-way, and a brass cylinder or valvecase, J. This cylinder J is provided withtwo steamports,j, to admit steam, and two steamports, .7", to allow it to pass into or fromthe steam-ports b, and thence to or from the chambers B B. It is also provided with an exhaust-port, jz, which opens into the exhaust Q. The ports j open into the steam passage- This case J is clamped between two disks of vulcanized liber or any other suitable packing, Ze, and the end closed by a screwplug, K2. A

N is a disk having an `exhaust-port, a', and

two steam-ports, a, the former of 'which is connected with the exhaust-port .7'2 by asgro'ove or port, i, (see Fig. 6,) and steam-ports n a are respectively connected with each end of the case J by grooves or ports i i. (See Fig. 5.) The head A carries a brass cylinder, L, Aarranged at right angles to the piston-rod, and provided with steam -ports Z Z and exhaustport Z2, substantially as in the .case J, the said ports opening into the ports n n. The ports Z Z open into the steamgpassage-way I.

M is a cylindrical steam-valve, having cylinders M M and M2, the two former of which control the admittance of steam by portsZ Z,

and the latterof which puts the steam-ports n alternately into communication with the exhaust-port Z2, or, in vother words, the steamports a with exhaust-port n. These cylinders are connected together by body m, which extends below to form a screw-shank, M, which works in a nut, M2 which is adapted to vertical movement, but not rotary movement, as it is kept from turning by a feather, mj, and groove m2. This nut rests upon the cam-extension C6 C7. The top of the valve M is provided with extensions P, between which work a flat or square extension-piece, P, secured tol or formed integral with a disk, p, and head p', held in the cap R by a gland, R. By turning the extension `Pthe valve M may be raised or lowered with respect to the case L by serewing it more or less into the nut M4.

K is the main steam-valve, and is similar to valve M, it having cylinders K K and K2, connected together lby body 7a, and works in the case J and between the packing ZZ.

The pistons C C have their diameters reduced, as at c, to allow the passage of steam from the ports to start said pistons'and pre.-

d vent the ports being entirely closed.

The operation is as follows: rlhe various parts being as shown in Fig. l, and steam being admitted from pipe Q by valve O, it passes through valve K to the upper ends of each chamber B,forcing down the pistons. During this operation the cam-extension C6 C7 slowly moves the valve M up and rotates the cylinder G. As soon as the valve M is raised sufficiently high to admit steam from upper port, Z, steam passes along port at to the end of case J and throws the valve K to the other end of. said case, yand now the steam is admitted to the bottom ends of the chambers, and that above the piston passes off by exhaustport j2, and when said valve K shifted its position the exhaust-steam between its end and packing k is passed by ports i n Z Z2 a n2 to exhaust-port ji. During the upward stroke of the piston-rod it makes a part of a revolution, as the ratchet-wheel G is prevented from rotating, and hence the feather C8 follows the oblique slot g. A slight steam-pressure on the top of the valve M always insures its being worked by the cam-extension. the drill may be regulated by turning the extension P, as that changes the position of the The stroke of valve M, causing it to vary the time of admission of steamto the rear end of the valve K, and

thereby vary the time of admission of steam below4 the pistons to lengthen or shorten the stroke. I

VVhile we prefer the constructions shown, We do not limit ourselves to all of the details, as they may be modied in various ways without departing from our invention.

In this application we do not claim the specific construction ofthe drill-chuck, as that will form subject-matter of a future application.

We are aware of the patent to Githens,

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August 5, 1875, and claim nothing therein y shown or described, the bolts in that patent being adapted to transmit motion to the bufferhead when the front cylinder-head is struck by the piston, and to hold the buffer-head rigid whenV the rear cylinder-head is struck by the piston, to the end that both heads shall have end-play or spring motion.

Having now described our invention, what we claim as new, and desire to secure by Letstroke, substantially as and for the purpose specied.

3. The combination of a cylinder, ring-piece B', piston-rod O, having solid piston G, loose pistonG'Z, split bushing E, head E, E2, ring E, a chuck made solid on the end of said piston-rod, cam-.extension C G7having feather CS, cylinder G, having oblique slots g, ratchet-wheel G', and one or more pawls, y', substantially as and for the purpose specified.

4. The combination of a cylinder, ring-piece B, piston-rod C, having solid piston O, loose piston C2, split bushing E, head E', split gland E2, ring E3, a chuck made solid on the end of said piston-rod, cam-extension C6 C7, having feather C8, cylinder G, having oblique slots g, ratchet-wheel G', one or more pawls, g', parts A A2, and cap A, and bolts F F, substantially as and'for the purpose specified.

5. 'Ihe combination of a cylinder, ri 11g-piece B', pistou-rod C, having solid piston C, loose piston'Ci, split bushing E, head E', split gland FF, ring E, a chuck made solid on the end of said piston-rod, cam-extension G6 C7, having feather G3, cylinder G, having oblique slots g, ratchet-wheel Gr, one or more pawls, g, parts A A2 and cap A, packing A, and bolts F F, substantially as and for the purpose specified.

6. The combination of cylinder A, ringpiece B, piston-rod C, having solid piston C, loose piston C2, bisected ring c', and means to secure said piston C2 on the piston-rod, substantially as and for the purpose specified.

7. The combination of cylinder A, having steam-ports b, ring-piece B', piston-rod C, having solid piston C', loose piston C2, bisected ring c', and means to secure said piston C2 on the piston-rod, the said pistons having a portion of their length reduced in diameter, as at c, substantially as and for the purpose specified.

8. A cylinder, in combination with a piston-rodhavingasolid piston and chuck formed upon it, a split bushing to nt the end of the cylinder and encircle the piston-rod, a head to hold said split bushing together and in place, and means to make a'steam-tight joint, substantially as and for-the purpose specified.

9. The combination of cylinder A, having steam-ports b, the lower of which enters the lower chamber, B, ofthe cylinder a short distance above its bottoni, to enable the piston to cushion on live or exhaust steam, ringpiece B, piston-rod C, having solid piston G, loose piston G2, bisected ring c, and means to secure said piston@2 on the piston-rod, the

,said pistons having a portion of their length reduced in diameter, as at c, substantially as and for the purpose specified.

10. In a rock-drill, a piston-rod extended to form cam-extension C C",vin combination with a piston steam-valve to admit steam to the cylinders aboveandbelow the pistons, and an auxiliary valve mechanism controlled by said cam-extension toA control or govern the time of admittance of steam to each end of said piston steam-valve to cause it to reciprocate, substantially as and for the purpose specified.

11: In a rock-drill, a piston-rod extended to form cam-extension C C7, in combination split gland l with a piston steam-valve to admit. steam to the cylinders above and below the pistons, an auxiliary valve mechanism controlled by said cam-extension to control or govern the time of admittance of steam toV each of said piston steam-valves, to cause it to reciprocate, and mechanism, substantially asset forth, to vary the stroke ofthe piston-rod, substantially as and for the purpose specied.

12. In a rock-drill, a piston-rod provided with the cam-extension C6 C7, projecting from the rear end of the cylinder and inclosed in a separate case, in combination with said cylinder-casc, valve mechanism actuated by said cam-extension to lcontrol the admittance of steam to the cylinder above and below the piston, and means, substantially'as set forth, controlled by the reciprocations of `said cameXtension, to impart an intermittent rotary motion to said piston-rod, substantially as and `for the purpose specified.

13. In a rock-drill, the cam-extension C QT, in combination with valve mechanism I and L, when constructed as shown, substantially as and for the purpose specied.

14. In a rock-drill, the cam-extension G6 C?, in combination with valve M, having screw M3, ports Z Z Z2, valve K, ports j j j n n t' t" t2,- nut M4, and means to screw said screw M3 more or less into the said nut M4, substan-` tially as and for the purpose specified.

15. In a rock-drill, the cam-extension C C7,

`in combination with valve M, ports Z Z Z2,

valve K, ports 7' 7",7'2 au t' t" t2, packing 7c Zt', to receive the concussion of the valve K in its reciprocations, substantially as and for the purpose specified.

16. In a rock-drill, the cam-extension C C7, in combination with valve M, ports Z Z' Z2, valve K, ports j j jg n a i i i2, passage-way I, and steam-valve O in said passage-way, to admit steam from the steam-main simultaneously to both valves K and M, substantially as and for the purpose specified.

17. The combination of cylinder A, piston' rodl C, a rear cylinder-head, and split bushing E with head E and longitudinal binding-bolts FF,substantially as and for the purpose specified.

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41S. `Ihe combination of cylinder A, piston C, arear'c'ylinder-head, and split bushing E with head E', a packing-gland, E2, and longitudinal binding-bolts FF, substantially as and for the purpose specied.

19. The combination of cylinder A, pistonrod Q, a rear cylinder-head, and split bushing E with head E, a split packing-gland, E, ring E, and longitudinal binding-bolts F F, substantially as and for the purpose specified.

In testimony of which invention we hereunto set our hands.

AMOS STEVENS.

ARTHUR L. STEVENS.

XVitnesses: y

WILLIAM MOWADE, Crus. Orrrz.