US74075A - gardiner - Google Patents

Description

TO ALL WHOM IT MAY CONCEBN: t Be it known thatl, J. B. Gewinns, ci Springfield, county of Hampdcn, S tato of Massachusetts, have-- invented certain new and .useful Improvements in'Steam-Pum'ps, ot` wl1ich.th follovving is a full and exact description, reference being had to the accompanying drawings, and tothe letters of reference marked thereon.

J. n. GARDINER or srinneriniin, MASSAGHUsETTs.

Letters Patent No. 74,075, dated Februari] 41,1868.v Y A VIhreOVBMBNT In STEAM-PUMPS.

In the drawings accompanying this description Figure lrcpresents a vertical section through 4the'steam-chest, steam-cylindex-,and shutting-box;

Figure 2 is a' vertical section, showing the arrangement of the-.valves and Figure 3 is another view of thevalves.

This invention, so fa'r as the movement of the steam-piston is concerned, is of rthat class of engine commonly applied to direct-action'steam-pumps, in which the main slide-valve isoperatedb'y -meansof a secondary piston, t which is Ain Vturn operated bysteam let en in some positive manner bythe steam-piston, for the purpose of 4 reversing the motion of the latter by the movement of the slide-valvo.v i i This motive-piston muy be independent from the valve operated by the steam-pston for tbepnrpose inentioned, namely, letting on o f the stenmto the motive-piston, as shown in thepatent to Gardiner SDVHyde, dated December 17, 1867, or it may be combined `into and `with it,.as in this case. i Y

'My improvements are, first, a new and improved method of moving the 'motive-valve;v second, an improved arrangement of the valve, Vin connectionwith its rodand lthe stegmfylindernnd,piston; third, an'impro'ved construction oi the valve-chest; fourth, an improved, form of st-uing-box.

In addition to' theordinary letting on of steam to the end of the motive-pistonforthe purpose if movingit', and, consequently, the slide-valve, I also simultaneously with thisletting on,i r just previous thereto, place the valve in ancha position that' the steam upon the opposite end of the motive-piston shall exhaust, and leave the valve free to'inove, thus rendering the motion of the-valve more positive;

l, I n order to shovr the manner of accomplishing this and my other improvements, will now describe the construction and operation of the invention. i

A is the steampiston B, the plunger of a single-acting, or the piston-'rod of a doubleLacting pump; C is the valve-rod, connected directly to the'ce'ntre of the piston, and passing through'into'the interor'of the c om- #bined secondaryvalve and motive-piston D. This valve-rod C has 'aA head, E, formed on it, for the purpose of moving the secondary valve, as hereafter described. F is the rnnin slide-valve', operated by the compound motion' of the piston-valve D. t

The operation of the steamfports is as follows: We will suppose tho steam-piston in theposition shown in v the drawing. Steam'is being let on at the top of the piston through the port a, and exhausted from blor through the port bi When the piston arrives near enough to the end of its stroke, the valveD isr moved by the .operatio'n ofthe projection v, on the head oi' the valve-rod, operating in the slot d in the valve, in sucha manner sa to bring theexhaust-ports Ag gon the end of the valve, in line with ca eh other perpendicnlarly; and the ports h h', ox the opposite end, also in s. similar manner in lino with each other.` There is, however, no communcationi between thestearn-chamber II and the upper enilof tho valve, `nor between the exhaustwbmbei J and its lower end, nntiltlteffurtlxcr downivard motion of the piston -carries them opposite leach-other horizontally', .when steam is lot on to the upper end and l oil'frorn tho lower, thus moving the valve D, and with it the slide-'- valve F, thus reversing the movement ofztlie vmain piston; This movement is repeated nt either end of the steamoylinder,'thus causing a' continuous reciprocating motion of the same. l

The other improvements in the construction of the ,pump ne,`th e arrangement of the fsteam-ehest and steam-cylinder one above the other, and of the same piece, as sliovn, thus saving much labor, and avoiding a joint which 'is apt Vto leak, and also thc arrangement of the valve, valve-rod, and steam'fpiston, in such` a manner *that they operate centrally tvith cach other, thus saving much friction, and avoiding cillcomplication attendant on outside and eccentric valve-rods and tappets; `also the nrrangemcnt of the steamrnhamber II upon one side,

and the exliaust-hamhcrJ upon the other, renders the formation of the ports `comnnrnicatingtherewith more direct, and enables mc to regnlatethc movement ofthe valve -hy allowing more or less st oam to pass from the steam-chanibcr 'to onecnd, and from the ther en d to -thc exhaust-chamber,'hymeansof the adjustingclowlV 'o o', 4as shown. 4 t

My improved stufng-box consists of followers, P :PQ Whichenterthecnds o f the steam a'nd watex cy`l inders,' vund press upon the packing in the recesses I I These follovvers have screw-threds cut upon them, on which,

the double nut S fits. This nut has a. right-hand thread out in one end, and a ie'ft-hand thread cut inthe-other;

nd as it is turned in one direction, the followers are forcedin upon tho pecking, und as it is turned in the other,

theyare drawn out away fro-mthe-same.

The Stettin-piston is shown in the drawings attached to lthe plunger of a singlenctinguptimp, shown in the patent to Gardiner & Hyde, December 17, 1867, thus forming. a. very Simp-le central direcbactingpump. f

The ndventuges of the construction of a steam-pump, as awhole, are, simplicity, co'mpxictness, end conse-f q -vent cheapness of construction, and'duiability.. Y

And now, having described my invention, what I 'claim as new, vund desire to secnre by fretten# Patent, is +-A 1. The arrangementmf ports' gy. on each end of the valve, and comunnilnting with thevexhnust, for the purpose ofassisting inthe movement ofthe valve, As* nbr'stantizii-lj'as.set forth;

2. The .arrangement of the steam-chmnbcrl-11 n .nd exhaust-chamber J upon the two sides ofthe steztm-chest,

substantiallyvas set forth.

3. The arrzingement of the screws o o, wh er= vvthv to adjust the vu moimt of steani let on and-'ofi' the valve, ma

described.'

4. Thestng-bok, ,constructed of lthe followers P P and nut S, in zonrbifmti on r'with the-piston A/und plunger B,zsub sta.ntiaily as described. i Y

' 5. In combination with the centrl-acting-valve, vaivc-rod md-steemgpisto'n, arrangc and operating nel

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