US576191A - Engine - Google Patents

Description

(No Mdel.)

'I'. R. HILL.

ENGINE. No. 576,191., f 3 Patented Feb. 2, 1897.

Urxurnnr STATES PATENT "OFFICE'.

THOMAS ROBY HILL, VOF PHILADELPHIA, PENNSYLVANIA, ASSIGNORTO THE OHOUTEAU MANUFACTURING COMPANY, OF MISSOURI.

ENGINE.

SPECIFICATION forming part of Letters Patent N o. '576,191, dated February 2, 11897. Application filed July 15, 189B. Serial No. 599,232. (No model.)

.To all whom, it may concern:

Beit known that I, THoMAs ROBY H1LL,a citizen of the United States, residing at the city of Philadelphia, county of Philadelphia, 5 State of Pennsylvania, have invented a certain newand'usefnl Improvement in Engines,

of which the following is a full, clear, and ex-v zo are designed more particularly to be run by compressed air as the motive iinid. Ihe front end of the cylinderl is formed with an-opening to receive the end of a chisel or like tool,

upon which the piston delivers impactingl 4z5 blows.

The engine is designed for use in cutting and carving stone, calking boilers, (be.

The special features of the invention which form the subject-matter of this present application reside in the construction of the cylinder,the sleeve, and the head-block,which cooperates with the cylinder and sleeve to hold the latter in position, there being suitpendent rotation of 'the parts after they are once assembled.

`Another feature of the inventionl resides in the instruction-of thefront end of the cylinder ivhereby the end of the tool-shank may be inserted to receive the blow from the piston Without being reduced in its diameter. Other features of the invention reside in the construction, arrangement, and.combina tion/of the several parts, all as will hereinafter be described, and afterward pointed out in the claims.

In the drawings, A indicates the cylinder,-

4 bored to receive a suitable piston B. The piston shown in this application is provided able provision made for' preventing inde` with ports with which cooperate suitable cyl- 5o inderports substantially like those shown and described Ain United States Letters Pat-` ent No. 542,498, dated July 9, 1895, granted to Pierre Chouteau, Aassignee .of Frank C. Rinsche, and I do not, therefore, claim the same here -as my invention, nor do I desire to be understood as limiting myself tothis par ticular form of piston or port arrangements,

as there are other forms of` pistons and port arrangements which could be used in connec- 6o tion with my invention. The forward end of the cylinder is bored for the passage of the lpiston-stein, the cxtreme forward end of the cylinder being bored to alarger diameter to receive a sleeve or bushing C, in which the end of the chisel (not shown.) isA inserted. The inner'end of this sleeve is formed with an inwardly-projecting flange c, which is of greater diameter `than the piston-stem open# ing leading from the'piston-chamber. In the 7o cylinder and connected with this space be tween the piston-stem and sleeve-'delige is an opening A. The object of so constructing` the cylinder and sleeve'is to enable the piston-stem to strike a' blow of fulllstrength on 75 the end of the chisel or like tool Without being influenced by the compression or suction of air which would occur were it not for this communication with the exterior. Again,

by so enlarging the diameter of the vsleeve l8o and forming a flange at its rear'end it is not necessary that the chisel-shank should be reduced to form a shoulder which would act as a stop to prevent the chisel following the piston-stein in its movement to the rear, said flange e here acting as a stop, which thereby greatly reduces the cost of production of .chisels to bel used in connection with an eneine.

a The forward end of the cylinder is formed 9o with a shoulder a, against which'abuts a sleeye .D, saidsleeve extending rearwardly beyond the cylinder.` In order to prevent independent rotation of either the sleeve or the cylinder when said parts are assembled,l I seat a suitable plug orV pin d in the cylinder, which pin isreceived in a recess or notch di in the forward end of the sleeve D.

' crease the area ofthe port.

In the construction of engines where a sleeve has been employed in connection with the cylinder, between which parts were formed the several cylinder-ports, it has been the practice heretofore, so far as I am aware, to form said ports in such a manner that the sleeve or the cylinder, as the case might be, would have to bridge a. considerable space and be unsupported at the point of said ports. This is objectionable in this that in the rough handling of the tool the sleeve, being unsupported for some considerable portion of its diameter, would become indented and, perhaps, "form a leak which would detract from the eciency of the engine. Besides if the indentation is deep enough it will de- I have overcome this objection by 'forming the ports between the cylinder and sleeve of a number of grooves which have a rib between them to support the sleeve. These grooves are connected together by the ports which lead into the cyll inder, and said grooves may extend to the end of the cylinder, as shown in Fig. 3, or they may terminate short ofthe end of the cylinder, as shown at the right in Fig. l.

E indicates a head-block which is formed with a shoulder e, adapted to tit against the rear end of the sleeve and clamp said sleeve in position. The forward end of this headblock is'threaded and received into the rear end of the cylinder. The head-block is so formed that there is a chamber or space left therebetween and the rear end of the cylinder, into which space lead the grooves forming the exhaust-ports. Leading from this space are openings e in the head-block, said openings being sc arranged side by-side that by covering one or more of said openings the exhaust willbe choked and the speed of the engine controlled.

F indicates an inlet-passage formed in the head-block E, said passage leading to the chamber F', formed at the forward end of said head-block by reducing its diameter, as shown in Figs. l and. The object of forming this circular chamber around the head-block is that when the head-block is screwed into the cylinder its proper distance, no matter what rotary position it'may occupy, it will still register withl the cylinder inlet-port.

' In order to prevent rotary movement of the head-,block after it has been seated home, I mount in a suitable bore formed therein a spring-pressed locking-pin G, which engages with a notch g, in the rear end of the sleeve D. The head-block is slotted, so that a projection on-jthe locking-pin may pass through to enable ,the pin to be withdrawn from its engagement with the sleeve when it is desired to disassemble the tool.

`From the above it will be seen that a tool constructed as shown in the drawings is simple,-,.cheap of cost, and compact. There is verylittle danger of the tool becoming loosened after it is once assembled, and by forming the cylinder-ports by Igroups of grooves, as shown, it will be seen that the cylinder supports the sleeve practically at all points of its periphery, and therefore there is very little danger of the sleeve becoming indented from rough usage. A Y

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

l. The combination with the cylinder, of apiston formed with a stem on its forward end, and a sleeve or bushing having an internal ange at its rear end, t-he opening in the rear end of said sleeve being of larger diameter than the stem of the piston so as to leave a space between the two, and an opening in the cylinder connecting said opening in the rear of the sleeve with the exterior; substantially as described.

formed with a shoulder near its front end, of

a sleeve which abuts against said shoulder, "said sleeve being formed with a recess 1n its forwardY end for receiving a pin seated in a recess in the cylinder, a head threaded in the rear end of the cylinder, a shoulder formed onv the head for abutting against the sleeve and clamping it in position, and a springpressed locking-bolt arranged in the head and adapted to engage a natch in the rear end of the sleeve; substantially described.

3. The combination with the cylinder, of a sleeve surrounding the same, a head for engaging said parts, there being. a chamber formed between the end of the cylinder and head, into which chamber leads the exhaust, and twc cr more holes formed in the head leading from said chamber, whereby, the escape of the exhaust may be controlled; sub

lstantially as described.

2tits into the rear end of the cylinder, and also engages the sleeve, there being a chamber formed between the end of the cylinder and head, into which chamber leads the exhaust,

and a reducedportion in the front end of the head, which forms a chamber for the motive iuid; substantially as described,

5. The combination with a cylinder, of a head which lits into the rear end of the same, said head being formed with an inlet-passage, which leads to a chamber formed in the front end of the head, said head having its diameter reduced to form the chamber; substan-' tially as described.

6. The combination with the cylinder which is formed with corrugations on its outer periphery to which lead ports from the interior, and a sleeve surrounding said cylinder; substantially as described.

7. The combination with the cylinder which is grooved longitudinally, said grooves being separated by a rib or partition, aport or ports.

IOC

Ipo:

IIC

@miei s LL continuous bearing'aiound the cylinder; substantially as described.

8;. The combination with the eylilider Whose periphery is grooved, said grooves being grouped, ports connecting Said groups with the in terior, and all of the grooves of a group together, and a Sleeve surrounding the eyl- 1o inder; substantially as described.

In testimony whereof hereunto affix my signature, in presence of two Witnesses, this 27th day of June, 1896.

THOMAS ROBY HILL. llfitiiesses:

- J. F. LYNCH,

Lome L. DREW

Images