US531587A

US531587A - Valve foe percussion book drills

Info

Publication number: US531587A
Authority: US
Publication date: 1894-12-25
Anticipated expiration: 1911-12-25

Description

(No Model.) 5 sheets-sheen 1.

' A. W. 8u Z. W. DAW.

VALVE FOR PBRGUS 10N RocK DRILLS.

Pmmntfa` Dec. 25, 1894.

5 Sheets-Sheet 2.

(No Model.)

A. W. 8v Z. W. DAW. VALVE FOR PERoUssIoN Roux DRILLS.

PatentedDec. 25.11894.

Wfnesse's:

(Nro Model.)

' 5 sheets-sheen 3. A. W. 8vv Z.W.'DAW. VALVE FOR PERCUSSION ROGK DRILLS.-

No. 531,587. y Patented Dec.v 25, 1894.

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flo'model.) 5 Sheets-#Sheet 4...

\ A. W. 8v Z. W. DAW.

VALVE FOR PERGUSSION ROGKDRILLS. No. 531,587.v Patented Dec. 2 5, 11894.

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VALVE PoR PERCUSSION 1100K DRILLS. No. 531,587., Patented Deci 25, 1894.v

l!!! xm* Q/ Wilnesses: jfnvenors:

' UNITED STATES ALBERT WILLIAMS DAW AND PATENT OFFICE.

ZACHARIAS WILLIAMS DAW, OF LONDON,

ENGLAND.

VALVE FOR PERCUSSION ROCK-DRILLS.

SPECIFICATION forming part of Letters' Patent No. S31/,587, dated December 25,1 894.

Application met Apru 13, 1894. serai No. 507,386. (No mais.) Patented in England June 13,1893, No- 11.607-

vTo all whom #may concern:

vented certain new and useful Improvements in and connected with Valves for Percussive Rock-Drills, and Direct-Acting Pumps and Engines, (for which We have obtained a Brit-v ish patent, No. 11,607, dated June 13, 1893,) of

which the following is a specification.

The present invention relates to the ern-v ployment of an auxiliary valve for controlling the exhaust of the pistons which actuate the` main valve for governing the supply and exhaust passages for actuating the main piston of reciprocating engines, such auxiliary valvey being itself actuated by passages controlled by the main piston. For this purpose an auxiliary valvegis arranged to work in a cylinder the opposite ends of which are connected by passages leading to near the opposite ends of the cylinder in which the piston of the reciprocating engine works, and which piston in its to and fro movements opens and closes such passages, so that when one side of such main piston is open to exhaust, the corresponding end of the auxiliaryvalve cylinder is also open to exhaust, While the opposite end of the auxiliary valve.cylinder is through the other passage open to the supply which is then acting on the opposite side of the main piston. The auxiliary valve is thus shot over from one end ofits cylinder to the other, and

in its movement shuts a passage leading to one end of the cylinder in which the main valve worksLwhile it opens a second passage leading to the opposite end of the main valve cylinder to the main exhaust. Y

The construction of the main valve and the arrangement of the ports or passages for actuating same may be similar to that set forth in the specification of our prior United States Patent No. 456,801, dated July 28, 1891, but the passages connecting the ends of the main valve cylinder with the passages leading to the ends of the main piston cylinder will not be necessary, as the connection with the exhaust in the present arrangement will be effected through the auxiliary valve cylinder. It will however be readily understood that the main valve may be constructed and actuated in any other suitable manner instead of that described in the specification of such prior patent.

In the accompanying drawings Figure 1 is a longitudinal vertical section through the auxiliary valve and main cylinder of a reciprocating engine, taken onthe lineas, x, Fig. 4. Fig. 2 is a central longitudinalvertieal section through the main valve and main cylinder of such engine, the main valve being arranged` and actuated in the manner set forth in the specification of our prior patent above referred to. Fig. 3 is a plan view of the face of the main cylinder. Fig. at is a transverse section through the auxiliary and main valves and the main cylinder, and Fig. 5 a horizontal section through the auxiliary and main valves.

passage, C or C', be open to the supply which is then acting on the opposite side of the main piston E, as soon as the latter in its travel uncovers such passage, and the auxiliary valve A will consequently be shot over from one end of its cylinder B to the other.

As will be seen in Fig. 1, the auxiliary valve A is formed with an annular groove A `in its center, While ports F, F', are formed in its cylinder B and lead respectively to the opposite ends of the main valve cylinder G, in -which works the main valve H for controlling the supply and exhaust to the main cylinder D in which the main piston E reciprocates. (See Figs. 2 and 5.) The auxiliary valve cylinder B has also another passage I leading to theexhaust passage J, and the movement of valve A in its cylinder B alternately connects IOO such passage I with one or other of the passages F, F, leading respectively to the opposite ends of the main valve cylinder G, which is consequently brought open to exhaust.

In the drawings the main valve H is shown as being actuated by the movement of the main piston E controlling a port or passage K leading from near the center of the main piston cylinder D to near the opposite ends of the main Valve cylinder G, as shown by dotted lines in Fig. 2 and also shown in plan in Fig. 3, so that steam from that side of the piston E which is being acted upon, is at a certain point in its travel admitted to one end of the main valve cylinder (the end of the passage K leading to the opposite end of such main valve cylinder being at that time closed by the main Valve H) and the main valve is consequently shot over in its cylinder and reverses the connection between the opposite sides of main piston E with steam and exhaust respectively, through the passages L, M andexhaust J in the well known manner. It will however be readily understood that such main valve II may be actuated in any other suitable manner t0 that described.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. In a reciprocating engine, the combination of a cylinder having a piston therein, a main Valve cylinder, having a valve therein, and an auxiliary valve cylinder, also having a valve therein, supply ducts leading from near the opposite ends of said piston cylinder to the opposite ends of said auxiliary valve cylinder, said ducts being controlled by said piston, supply duets also leading from said piston cylinder to near the opposite ends of said main valve cylinder and being controlled by said piston, exhaust ducts leading from the ends of said main valve cylinder t0 the auxiliary valve cylinder, a main exhaust duct for said engine, and apassage connecting said main exhaust duct with said auxiliary valve cylinder, said main exhaust passage and said main valve exhaust ducts being controlled by said auxiliary valve, substantially as described.

2. The combination with the main valve of reciprocating engines, of an auxiliary valve having passages leading from the opposite ends of the cylinder in which such auxiliary valve works, respectively, to near the opposite ends of the main cylinder' in which the main piston works, and which passages are controlled by the movement of the piston, the movement of such auxiliary valve controlling other passages leading respectively to the opposite ends of the cylinder in which the main valve Works so as to place such ends alternately in connection with an exhaust passage through the ports of the main cylinder and through the main valve to the main exhaust, While the supply to the opposite ends of the main valve is controlled directly by the movement of the main piston through passages leading from the two ends of the main valve cylinder to the main piston cylinder, substantially as described.

ALBERT WILLIAMS DAW. ZACHARIAS WILLIAMS DA'W.

Witnesses to the signature of the abovenamed Albert Williams Daw: J oNAs HILAND, I. RINAAS. Witnesses to the signature of the abovenamed Zacharias Williams Daw:

HARRY A. MCLRLLAN, H. J. FERRY.