US26275A - Peter louis - Google Patents

Description

N4 PERS. PHOTO'UTHOGRAPHER, WASHINGTON, D C.

the plane indicated by the line Y, Y, of

UNITED sTATns PATENToFmcE. v

PETER LOUIS, OF NEW YORK, N.` Y., ASSIGNOR TO HIMSELF,` AND `'HIRAM WANDEL, OF

` RICHMOND COUNTY,` NEIN YORK. t

VALVE-GEAR or STEAM-ENGINES.

Speccation of Letters Patent No Tol all 'whom 'it may cof/wem.'

Be it known that I, PETER Louis, of the ing drawings, forming a part of this speci-` fication, in which- Figure l, is a front elevation of the side pipes, valve chest and valve gear of a beam engine. Fig. 2, is a vertical section at right `angles to Fig. 1, in the plane indicated by the line X, X. Fig. 3, is a vertical section in Fig. l. i i i Similar letters of reference indicate corresponding parts in the several ligures. s

My invention relates to the direct application of steam to operate the valves of steam engines, and is more especially intended for use in beam engines or other engines with upright cylinders, having puppet valves, but it may be applied to any engines whose valves have a vertical motion. It consists in a novel mode of applying an auxiliary steam cylinder and pistons in` combination with the valves of the main engine to effect a quick opening and control the closing of said valves. And it further,`

consists in certain means of retaining the eduction valves of the main engine in an` valve chests containing the usual system of balanced puppet valves. a

The induction valves I, I, are exhibited in Fig. 3, and the eduction valves E, E, in

Fig. 2, but Fig. l, though it exhibits none of the valves, exhibits the stems z', z", of both the induction valves and the stems e, e', of both eduction valves. The stems i, and e, of

thetwo upper valves pass through stuffing boxes in the bottom of the valve chest A, and the stems i', and e', of the lower valves, through stuiing boxes in the top of the valve chest B. The above described parts all belong to the main engine. i

. 26,275, dated November; 29,` 1859. 1; 1

l), is the auxiliary steam cylinder containing the pistons `Rand `F', upon whichl the Steam operates to open thevalves of the main engine, said cylinderbeing veryvsmall and having'atiansverse partitiong, (Fig. 3) at the middle of its length and haviiigf` one piston above and the otlierbelow said partition, the rod c, of theupper piston F,

end and the rod c', of the lower one through j a stuffing box iii the lower end. This cylinder D, is secured iii an `upright position to: a frame G, which is bolted to the side `pipes i H, containing a short" slide valve T, and? Y a similar arrangementV of portsh, 71,', j, to` those commonly employed 1 in small slide valve steam engines, the port i., communi`- partment of the said cylinder, the port hf,"

ofthe said cylinder and the port @with an; exhaust pipe Z2, which may open into` the main engine. The `steam chest II, is sup` plied with steam from the boiler by a pipe 1l, which connects `with `a small valve` boxm,"1 at the back of the steam cliest.H`,`fsaid valve stop valve n, whose stem it', is connected with a hand lever p." The steam pipefl, isitted with. a plunger valve g,- andthe exhaust pipe la, with a Msimilar valve r, the" s means notnecessary to be here described `to f control. the admission `and escape of steam." The slide valve T,` has itswstem;uyconnected J, which is arranged towork in bearings fu, o, secured to the` side pipes C, C; and whose arm wi, connects with `the rod Ki, of an eccentric K, on the main` or crankf` 'from such main shaft, described. :v i i The rock-shaft J, is `furnished with a hand lever L,to enable theA valve T, to be as will be presently` pistons and valvesand -valve gear" may be considered as an-auxiliary` engine. Theupper piston rode, is furnished with a crosshead c4', and thelowerone with a cross-head iii proportion tothe main engine cylinder` 601 passing through a stuftingbox in its upper, 651

C, C. It is furnished with avalve chest7A catingwith the bottom of the upper com-175 with the bottom of the lower compartment s s atmosphere or into the condenser oftthe `S".`

box being iitted with a slidingI throttle and 85"" said valves being capable of adjustment by with the arm w, of a horizontal "rockshaft" shaft of the main engin`e` or anyother sha-ft.I y l, provided for the purpose,ider`1ving motion;`

worked by hand. `The cy131iderD,with its 105 a, each of said crossiheads'being secured 119 firmly to its respective piston-rod. The upper cross-head a, has connected with Vit-the stem z', of the upper induction valve I, and thestem e', of the lower eduction valve E', and the lower cross-head a', has;attached to it the stem z", of the lower induction valve I', and the stem e, of the upper eduction valve E.

The connection of the stem e, with the cross head a', is made by means of a vertical rod b, which is rigidly attached to the said stem by an arm 6*, and hence the two stems e, e', are prevented interfering with each other. The stems z', i', are furnished with fast collars f, f', above their respective cross heads and the stem e', and rod b, are furnished with similar collars c, e', against which the cross heads press upward to lift the valves of the main engine when the pistons F, F', of the auxiliary engine are raised by the pressure of steam below them in the cylinder D; but the said stems and rod are so fitted to their respective cross-heads that the latter are capable of sliding on the said stems and rod below the said collars. The object of such mode of tting the stems to the cross heads is to permit the eduction valves of the main engine to be opened a little before the induction valves thereof, and to permit the cross heads to descend with the said induction valves to cut oif the steam while the said eduction valves remain open, Springs 4, 4', are applied between the cross heads and the collars f, f', of the induction valve stems of the main engine to enable the eduction valves to be' iirst opened, the induction valves not commencing to open till the elasticity of the spring is overcome by the upward pressure of the cross heads.

N, is a horizontal rock-shaft arranged to work in bearings bolted to the backs of the side pipes, said rockshaft being furnished with two toes O, O', which are arranged under arms P, P', the former of which is fast upon the rod b, and the latter upon the stem e'. The said rock shaft is also furnished with an arm Q., by which it is connected with the eccentric rod Ks, and caused to derive a rocking motionV from the eccentric K, coinciding with the rocking motion of the rockshaft J. The toes O, O', are so arranged that they follow the arms P, P', and their respective rod b, and valve stem e', are raised by their respective cross heads, for the purpose of being ready to receive the said arms-and support the said rod and stem and so keep the eduction valves of the main 'engine open to the end of the stroke of its piston notwithstanding the descent of thecrossheads to permit the closing of its induction valves to cut off the steam. f l

The operation of the valve gear is as follows: The slide valve T, of the auxiliary engine is worked by the eccentric K, in the same-manner as the slide valve of an ordi- -nary steam engine admitting steam to each 'of cutting off steam early in the upward stroke of either of thecpistons F, F',. that the steam may be -allowed* to act expansively upon said pistons. Whensteam is admitted to the `upper compartment of the said cylinder D, it raises the piston F, and with it the upper induction valve I, and lower eduction valve E', of the main engine, effecting a very quick opening of said valves and admitting steam to the upper end of the cylinder of the said engine and permitting its exhaust from the lower end thereof. When the steam has been-cut: offI from the passage it, by the movement of the slide valve T, and the exhaust permitted from the upper compartment of the cylinder D, the piston F, descends with the valve I, to cut ofl'y the steam from the main engine, but the descent of the said pistonis so much checked by the slowness of the exhaust resulting from the contraction of the passage of the exhaust pipe c, by the valve r, that the valve I, is lowered so gradually as to prevent its slamming. The eduction valve E', does not descend with the piston F, the toe not permitting it to close till the stroke of the main engine piston is terminated. When steam is admittedto the lower compartment of the cylinder D, the piston F', operates in the same manner as above described with reference to F, and produces the operation of the valves I', and E, in the same manner asV E'. The cutting off of the steam from the main engine by the valves I, and I', is made to take place earlier or later in the stroke of the engine piston by adjusting the valve r, to give a more or less free exhaust.y This may be also varied by giving the slide valve T, more or less movement to make it cut off steam sooner or later in the stroke of the small pistons F, F', and provision is made for this latter mode of variation by constructing the arm fw, of the rockshaft J, to screw through the said rockshaft as represented in the drawing or otherwise making provision for varying the eifective length of the said arm.

The valve T, may be operated by means of a cam instead of an eccentric and by that means the steam may be cut off in the cylinder D, at an earlier point in the stroke of the engine piston, and so an earlier cut'- ting-OH of the steam by the Valves I, I', may be obtained. Y

The heads of the cylinder D, may each 26,275 a a n have an opening With a pipe attached to communicate with the condenser of the main engine, by which means the pistons F, F, may be operated to open the valves with less steam and the cushioning effect of the steam in D, is aided to check the descent of the said pistons. Then such connection With the condenser is not made, no stuffing boxes are required in the heads of the cylinder D, but simply guides for the piston rods c, c.

I do not claim broadly effecting the operation of the valves of steam enginesby the direct application of steam but What I claim as my invention and desire to secure by Letters Patent, is-

1. The auxiliary cylinder D, having a partition g, and arrangement of steam and exhaust passages substantially as described, and fitted with a valve T, or its equivalent and with two pistons F, F, on opposite sides of its partition, applied substantially as described in combination with the induction and eduction valves and the shaft of the main engine so that each of said pistons acted upon by steam admitted `to its com-` partment of the auxiliary cylinder by the valve T, or its equivalent `serves `to open one induction andthe opposite ediuction ing as described to open the induction and eduction valves of the main engine, I claim the employment of the rockshaft N, and its toes O, O, so appliedfin combination with the said eduction valves that While they 1permit the said valves to be opened by the action of the steam on the` pistonsof the` auxiliary cylinder they keep the said valves open as long as may be desired substantially as herein described. 11

` f PETER LoUIs. y

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