USRE1877E - Improvement in steam-engines - Google Patents

Description

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN STEAM-ENGINES! Specification forming part of Letters Patent No. 8,201, dated July 1, 1851', Reissue No. 1,877, dated February 2l, 1865.

.T0 @ZZ whom L' may concern.-

-Bet known that I, FREDERICK P. DIME FEL', of the city of New York, in the State of New York, have invented certain new and useful Improvements in the Steam-Engine, and more particularly in the manner .of ccnnectin g the steam-piston with the crank, so as torender the whole apparatus more compact, and to obtain a. longer stroke of the engine iu a given space than has hitherto been obtained; and I do hereby declare that the following is a. full, clear, and exact description thereof, reference being had to Ithe accompanying drawings.

Figure l represents such partsof asteamengine as are deemed necessary to elucidate the nature of my improvements thereon.

This engine is represented as standing vertically, although its position may be altered without changing the nature of my improvements but this vertical position is to be preferred where there are not anyserious obstacles in the way of adopting it.

A A represent thesteam-cylinder, B the piston-rod, and C the cross-head, of which latter is shown in Fig. 2.

D is a slideupon the cylinder, there Mbeing another on its opposite side.

Fig. 3 is a top View of the cylinder, and of two metallic rings or belts which surround it, and which are to play up and down with the piston, one of these rings E E being attached to the cross-head by the side rods, F F, of which there are four, the .cross-head being bifurcated or divided into twol parts at each of its ends, as shown at .G G, Fig. 2, the sides of the connecting-rod N N, to be presently described, passing'alternately into the spaces G G in the cross-head as the crank revolves and the piston reciprocates.

D D are guide-blocks attached to and making a part of the Vibrating ring E E, and which embrace the slides D D, and thus serve to causethe cross-head and piston to move vertically. Should it be found necessary, a parallel motion may be attached to one of the ends of the cross-head to make it work steadily.

Under the foregoing arrangement the crosshead is made to stand at right angles to the crank-shaft, this being' necessary in order to allow it to pass up between the cranks and to a top view l effect the saving of roomconsequent thereon.

I is the crank, standing immediately over the cylinder; J, one end of its shaft; and K, one of the pillow-'blocks supporting the ends of shaft J." L L are columns 'which support the cappieces M and the pillow-blocks K. There are four columns, L, two on each side of the cylinder. r f y N N is the con necting-rod, which, instead of consisting of a single bar, is forked inthe manner represented inthe drawings, its stub end embracing the crank, its crosspiece ystandin g l transversely to the crank-sh aft, and its two bars I N N extending downward on opposite sides of the cylinder. This connecting-:rod will at `its upper end vibrate from sidetd side to a distance equal to the throw of the crank, and it is to admit of this vibration that the ends of .the cross-head Gare bifurcated, the bars N N passing'alternatelyinto the spaces G G. The.l lower ends of the bars N N of the con ecting-rod are attached to a ring or belt, O O, which suiirounds the ring or belt E. Thesetwo rings are connected together by joint-pins ,at P P in the manner of gimbals.

The cylinder Q .represents that of an airpump, the piston and piston-rod R of which may be carried by a cross-head, S, the rod T beinga slide-rod passing through a socket, U, there beingv a similar slide-rod and socket on the opposite side of the piston-rod R.

V is a vibrating lever, connected by linkrods W to the vibrating rings or belts E O, and by link-rods X. to the air-pump Y crosshead S. The air-pum p, when one is used, may be otherwise arranged, my improvements not depending upon the particular Vmanner of combining this with the other parts ot' the engine.

I have contemplated the forming of the lower part of one of the columns L into a condenser, and another into a hot-well, which can be readily eieeted by any competentfmachini'st, should such au arrangement be deemed eligible. l Y v Under the foregoing arrangement it will be I seen that asv the crankshaft is made to revolve the rings or belts E and 0 will be l moved up and down on theou'tside of the cyl` l Inder, being guided by the slides n n.

dinarlly subjected.

the stem b is raised, the valve c will be lifted,

' two chambers, one of which is an induction covered by a cap, k, having in it a stuingl which valve has its seat in the plate g and .r r, Fig. 5, and the other (not shown) Vbeing `valvelifter s, Big5, rises to admit the steam supposed to be under thel opening o, will on In Fig. 4 of the accompanying drawings I have represented an imp1oved puppet-valve, such as is, attached to-my steam-engine, the object of which improvement is to cause it to oder less resistance in opening;r under the pressure of steam than that to which it is or- In this figure, a a is a puppet-valve resting on its seat. b is the valve-stem, and c a smallvalve, of which (he larger valve, rt a., constitutes the seat. When and this may have a play of half an inch, more'or less, before it comes into contact with the bar or crosspiece d, attached to the main value, which it will then lift. The raising of the small 'valve c will allow steam to pass through itsseat and under the main valve aa,

which will consequently be lifted with facility.

In the accompanying drawings I havealso shown an improved manner of arranging and combining the steam-pipes, steamchests, and valves. It is as follows:

Fig. 5 is a sectional representation of a steamcylinder, having at its upper and lowerI en ds cylinder-heads of a peculiar construction, each ot them being so formed as to constitute and the other an eduction chamber.

d d is the cylinder, and e eff' are steamchambers, formed in the cylinderheads, each of which heads consists ot' a double plate, g g and h It'. In each of these heads there is a partition, which divides the space between the two plates into two semicircular chambers.

Fig. 6 is a top view of the upper head, the partition which divides the space between hh and g g into two chambers bei'ng shown by/ the dotted lines z i.

j is`an opening, which in Fig. 5 isshown as box for the passage of the stem ofthe valve l,

opens upward, m is a plate on the lower head similar to that marked 7c in the upper; and n is a valve in the plate g', also furnished with a s tuingbox and opening upward.

The opening o in the plate h, Fig. 6, is similar to the opening j in its otice--that'is to say, it is situated directly above two valves ninthe respective plates g and g', but operating in al direction the reverse of that of the valves l and a-i. e., the uppermost valve opening downward andthe lowermost valve opening upward. The openings p and q in the plate h'h are for the reception of the induction and eduction pipes, one of which is shown at similar thereto. The induction and eduction pipes cross each other below the lower head, as they have to connect with the reverse chambers in the upper and lower heads. The

into the cylinder, supposing the space e to be voperating as an induction-chamber. 'Ihe valves vin the opposite chambers, which are the contrary have the rod corresponding with s to move in the reverse direction to effect the same purpose.

In the arrangement of the upper head, as shown in Fig. 5, said head cannot be removed so as to get at the piston without disconnecting the steam'and eduction Vpipes at the point where they are joined by flanges t t, which is attended with considerable inconvenience but this may be olivi-ated by the particular manner of constructing and putting on the upper head, as represented in Figs. 7 and 8. The general arrangement of the chambers, valves, induction,and eduction. pipes is the same as that above described and represen ted in Figs. 5 and 6.

In Fig. 7, d is a sectional view of a part ot' the cylinder, e c Athe steam-chambers, and r 1f a steam-pipe. This steam-pipe enters'a small chamber or nozzle, u, two of which are cast onto the cylinder', as indicated by the letters u u in Fig. 8. This last figure represents the top plate of the head, corresponding with h h in Fig. 6.

v and w are two arched spaces, which consti tute steam ways, leading from the induction and eduction pipes into the respective chambers. By passing screwbolts through the flanges ww around this head-plate and through anges cast on the cylinder in the ordinary .way said plate may be secured in place, and

so, when' this improved mode of arrangement is compared withthat which is usually adopted. The steam contained in the steam-nozzles 0r passages leading from the valveseats to the head of the cylinder, as formed in the ordinary engines, is by this 'arrangement entirely saved. The valves in the plates g g and g' g are flush, or nearly so, when closed with the internal faces ot' those plates or heads.

It will be manifest that slide-valves might be substituted for the puppet-valves herein spoken of, while the general arrangement of the parts upon which the improvement. is mainly dependent might remain unchanged.

It is evident that the construction and arrangement of the valves and valve-chambers above described will not affect the method I have described of connecting the steam piston and crank, and that this method may be used in connection withvalves and valvechambers difterin g in construction and arran gement from those described in this specification.

1n the foregoingdescription I h." vestated that the cross-head of the steam-piston is forked at its opposite extremities to allow the bars of the forked conn eating-rod to plaly through it. It is evident that the same resu t will be obtainedif the cross-head is made single andthe side bars of the connecting-'rod are 'forked A.to embrace its opposite extremities, this arrangement' being in fact the converse of y the'one I'have described.

WhatI claim asnew, and desire to secure, by Letters Patent, is- A 1. The means herein described for connect 4ing the steam-piston 'of a steam-engine with thqcrank thereof', said means consisting of a piston-rod, xed'cross-head, side bars, forked connecting-rod, and belts, or the equivalents thereof, the several devices being arranged and operating substantially as herein set forth in such manner that the cross piece of the connecting-rod, which is placed transversely to the. crank-shaft, shall be on opposite sides of the axial line of said shaft at oppositeextremities of the stroke of t-he piston.

` 2'. The forming of the eduction and induction chambers onl cylinder-heads of steam-en gilles, and'furnishing them, respectively, with supply and exhaust-valves, substantially in the manne'and for the purposes-described.

Vwith their respective chambers, to steam-cylinders, for the purpose set forth.

A F. P. QIMPFEL. Witnesses:

R. .l.` CAMPBELL, EZRA MILLER.

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