US72123A - Improvement in steam-engines - Google Patents

Description

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IMPROVEMENT IN STEAM-ENGINES.-

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Be it known that I, Il'. TRQXEL, et" Bloomville, in the county of Seneca, and State ot' Qhio, havelinreuted a new and useful Improvement in Steam-Engines; and I do hereby declar that the following is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the same, reference being had to theaccompanying drawings'i'orming part of this spccieation. t

This invention relates to a new and improved construction of steam-engines, whereby the same are greatly increased in power and effectiveness; and the invention consists in thearrangement of several pistons in one cylinder, and in the construction and arrangement of the parts, as will be hereinafter more fullydescribcd.

Figure 1 is a vertical longitudinal section `ot` the engine through the line a: :e o f g. 2showing the cylinder and the pistons therein, and the manner'in which the piston-rods are `connected with the main shaft.

Figure 2 is a. horizontal longitudinal section of the engine, showing, also, a `top or plan view of the conneeting-rods, main shaft, and valve-movemen t.

lFigures 3 and"4 aredetached views of the cylinder, showing the steam-ports and steam-valve, with the pistons represented in different positions in the cylinder, or as taking steam from the diifercnt ports.`

Similar letters of reference indicate corresponding parts.

A represents the cylinder. C, D, and E represent the pistons. 'lhe principal fcaturehof my invention is operating pistons in a cylinder without heads, and thereby exerting the full expansive force ofthe steam upon the main shafts. Two of'these pistons, C and E, are connected with a bar, F, which slides bythe side of the cylinder (outside.) G and Hare arms, .attached to the bar F, 'Io these arms thc rodsare attached upon which are fixed the pistonsr C and E, as'seen in the drawing. J isrtlie. rod for the piston C, and K for the piston E. The piston D is attached to another rod, L. These rods are attached to a double crank, m, `on the end of the main shaft, by connecting-rods or pitman n and o. The piston-rod K is in tlie form of o. half tube or a semicirele, andthe piston-rod L is partially enclosed byit, which enables it to pass through and work in the centreof the piston E. P P represent ^the steam-ports. R is the exhaust-port, and S is the `inductionport. Referring again to the pistons, the arrangement is such that as the shaft revolves, the pistons D and C, and D, andE, are moved in opposite directions, and approachcach other when opposite' the ports, as seen in the iigs. 3 and 4, and when thus opposite, the cylinder is taking'stearn between the two pistons C and D, iig. 8, and exhausting it between thepistons Dand'E. In g.`4 the position of the pistons is reversed. There the steam is entering the cylinder between the pistons D and Egfrom the port P', and exhausting it from between the pistons C and D, through the port I. The elect of the steam is to force the pistons D E from each other, and the whole'oi` the moving-power thusimparted is exerted directlyon the main shaft through the double crank m. Attached to two o f dthe pistons, C and D, as seen' in g.' 1, are springs ff, which are sg Vplaned that as the pistons approach each other, as seen in figs. 3 and 4, theV tendencypof the springis to-assist the steamin starting or reversing thcmotion. T is vthewralve, which in this arrangement is avery simple and ingenious device for changing the steam from one port to the other, as is indicated by the arrows. u is a rod, which is attached to this valve, which rod is supported by a stand or bearing at its outer end, as seen in the drawing. To operate the valve T, or-to lgive it an oscillating motion, which is the motion required for opening and closing the ports or steam-apertures, there is an arm, V, on the piston-rod K. w w are-tappet-pins on the valve-rod u, which are placed at a proper distance from each other.

It will be seen that 'as the arm V is moved hack and forth by the piston-rod, to which it' is attached, it will strike the tappet-pins and move the valve-rod u, and consequently oscillate the valve, thus changing the steam from one port to the other alternately, and thereby allowing theste'am to exhaust at the same time. The power derived from the expansive force of steam in forcing asunder pistons ina cylinder, according to myinvention,

may be applied to every description of machinery driven by steam, with the proper variations iin the details to adapt the engine to particular circumstances and situations.

In applying the engine to locomotives, the main shaft would represent the axle, and the pitman n o would be connected directly with the driving-wheel in a manner similar to that now practised.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. I claim the construction of the oscillating valve T, and arrangement of the openings S P P', and R, substantially as shown and described. 5

2. I claim the arrangement of the pistonfr-ods K and L, operating in one and the same end of the cylinder, substantially'as shown and described. i

J.` F. TROXEL.

Witnesses s' JACOB HossLnn, W'ILLIAM DEWITT.

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