US253604A - Duplex pumping-engine - Google Patents

Description

5 Sheets-Sheet l.

D. S. EINES.

DUPLEX PUMPING BNGINB.

Ils

Patented Feb. 14, 1882.

(No Model.) 5Sheets-Sheet 3,

D. S. EINES.

- DUPLEX PUMP-ING ENGINE. l

No. 253.604. Patented Feb. 14.1882.

nml immuni (No Model.) 4 5 Sheets-Sheet 4.

D. lS. EINES.

v DUPLEX PUMPING ENGINE. No. 253,604. Patented Feb. 14,1882.

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N. FEYERS. Phomuxhognphar. wnshingmn. D. c.;

5 Sheets-Sheet 5 (No Model.)

D. S. EINES. DUPLEX PUMPING ENGINE.

' Patented Feb. 14,1882'.

UNITED STATES.

PATENT OEEIOE.

DAUPHIN s. HINEs, O F BROOKLYN, NEW YORK.

DUPLEX PUMPlNG-ENGINE.

SPECIFICATION forming part of Letters Patent No. 253,604, dated February 14, 1882.

i Application filed September 15, 1881. (No model.)

To all fwhom it may concern:

Beit-known that I, DAUPniN S. HiNEs, a citizen .-.of the `United States, residing in the city of Brooklyn, county ot Kings, and State of New York, have invented certain new and` useful Improvements in Duplex Pumping-Engines, fully described and represented in the followingspecitication and the accompanying4 drawin gs,formin g a part of the same.

In said drawings, Figure l is a yplan view ofy a two cylinder duplex high pressure engine containing my invention. Fig. 2 is a vertical longitudinal. section of one of the cylinders with `ports and valves, taken on the line x of Fig. l, with the` parts for moving the valvesiin elevation. inder compound duplex engine containingmy invention. section of two of said cylinders, showing the ports and valves, taken on the line y y of Fig. 3, themeansfor operating thevalves being shown in elevation. Fig. 5 is a longitudinal section of a cylinder with ports and valves,

the means for operating the latter being shown pressure by the operation of the throttle and induction `valves while the piston is in motion but when its speed is cheeked and it pauses during the reversal of the stroke for a brief interval of time the pressure in the cylinder rises untilunder certain circumstances, it-approximates closely to the boiler-pressure, and,y

may be exhausted perhaps at one hundred pounds to the square inch when the effective workingpressure does not exceed eighty pounds.

:The object ot' m yinven tion is to prevent such increase of the pressure upon the piston at the closeof the stroke 5 and it consists,in a duplex:

Fig. 3 isa plan view of a four-cyl- Fig. 4 is a vertical longitudinali pumping-engine, ofthecombination, with each induction-port of the high-pressure steam cylinder or cylinders, ot' an intermediate valve operated to close such port during the pause on the-reversal of the piston.

It also` consists in other combinations of parts, hereinafter-fully described and claimed.

Iuthe drawings I have shown three modes of carryingv out my invention, one shown in Figs. 1 and 2, the secondin Figs..3 and 4, and the third in Fig. 5, the second and third being modifications of the lirst.

In these drawings, l 1 are the high-pressure steam-cylinders. 2'2lare the steam-chests, each containing main distributing steam-valve of D form.

3 3 are-the piston-rods, having pistons working inthe cylinders 1 1', respectively. Each piston-redis connected to a pump-plunger in the ordinaryv and wellknown way in duplex pumping-engines.

4 is alrock'er-arm connected to a suitablyjonrnaledshaft, 5', which', through a crank on itscnd and aconnecting rod', 6, operates the D-shaped valve in the steam -chest 2 of the cylinder l', the rocker-armv 4 being moved by a pinfsecured to the .piston-rod 3l and working in a slot in its end.

4 is also a rocker-'arm secured to a.v properlyjournaledv shaft, 5, which in turn has-a crank on its end connected by a rod, 6', with a D- sliapedvalve in the steam-chest 2 of theeylinder l', and is operated vby a pin on the piston-rod 3 engaging the slot inthe end of the rocker-armv 4. This .is the well-known form of the Worthington duplex engine, and needs no further description to enable those skilledvin the art to understand the same and how it operates. a

Each high-pressure. steam-cylinder is provided with induction-ports 7 8, leading from the steam-chest to the cylinder at either end, whichconvey the live steam to the high-pressure cylinder to workthe piston therein. These ports are opened and closed by the D-shaped valvein the .well-known, manner. Gontrollin g the induction-ports?v 8 areintermediate valves, 9.10, one for each port. As shown in Figs. l and 2, theseV valves are rotary ones extending across the yport'trom side-to side, and provided bar 15 belonging to the cylinder 1' is reciprocated by means of a crank, 18', secured to the shaft and a connecting-rod, 19', While the bar with which the cylinder 1 is provided is operated by a crank, 18, secured to the shaft 5 and the connecting-rod 19. The cranks 12 and 14 are provided with springs 20 21, secured to a common stud, 22, which springs operate to rotate the valves9 and 10, so that the t passages 53 54 may coincide with the ports 7 8 at the proper time, any convenient stop being applied to each valve to prevent it from turning too far underthepressure of its spring. At the time the piston in the high-pressure cylinder 1' comes to a pause, asis usual inthe Worthington duplex .pumping-engines, at the left-hand end ofthe cylinder, as shown in Fig. 2, through the operation of the rocker-arm 4', shaft 5', crank 18', and connecting-rod 19', the set-screw 17 has struck the pin on the' crank 13 and turned the valve 10 into a position to close the induction -port- 8, and thus cut o communication between the steam-chest and the cylinder. Upon the return movement of the piston, the bar 15 beingcagain moved by the instrumentalities described, the adjustingscrew 17, moving away from the pin on thev crank-arm 13, permits the spring 21 to rotate the valve until its passage 54 coincides with the induction-port 8, and when the piston arrives atthe end of its return-stroke and pauses, the bar 15 will have been ,moved so that its set-screw 16 will have come iu contact with the pin on the crank ll, and will have rotated the valve 9 and closed the induction-port 7. Upon the return ot' the piston the valve 9 is again opened.

By means of the adjusting-screws 16 and 17 the point ofcontact ofthe pins with the cranks 11 and 13 may be regulated, so that the intermediate valves inay be closed at the proper time and remain closed as long as may be required.

Itis obvious that the intermediate valves of the cylinder l will be operated in the same way and produce the same effect as those lielonging to the cylinder 1l through the instrumentality ofthe rocker-arm 4, shaft 5, crank 18, and connecting-rod 19.

As shown in. Figs. 3 and 4, theintermediate valves, 9 10, are ot' puppet form, operating in chambers communicating with the respective ports 7 and 8. These puppet-valves areot the well-known form, having stems guided in spiders, and each provided with a collar which operates in connection with a slotted' link or swivel, 24. Each link 24 is at its upper end provided with a screw-thread engaging with a nut, 25, which in turn is swiveled upon a stem, 26, connectedy to one lever of a bellcrank, the other lever being connected to a rod, 30'. The rod 30' is pivoted to a crankarm, 3L', secured to the shaft 5', operated by the rocker-arm 4' vthrough the pin on the piston-rod-3. The connecting-rod 30, belonging to the high-pressure cylinder 1, is in turn pivoted to the bell-cranks to which the stems 26 are connected, and is actuated by a crank, 31,

Von the shaft 5, to which it is pivoted. When the piston of the high-pressure cylinder 1' pauses at the end of its stroke at the left-hand end of the cylinder, as shown in Fig. 4, the

puppet-valve 10 will be permitted,through the operating mechanism just described, to seat itself' by gravity, and thus close the port 8 and prevent the ingress of thelive steam throughit. Upon the piston of said cylinder reaching the other end ot' its stroke the intermediate -valve l() is raised through the connecting mechanism described, while the valve 9 is allowed to descend and seat itself by the force ot' gravity,

and thus close the induction-port 7. Upon the return ot' the piston the valve 9 is again raised to permit the passage of live steam.

By means of the nut 25 the opening andv closing of the intermediate valves in relation to the movement of the pistons may be regulated.

Itis obvious that the intermediate valves,

9 10, of the cylinder 1 will be operated in the same way and produce the same effect, through the instrumentality ot' the crank 3L on the shaft 5, connecting-rod 30, and the bell-crank levers, as those with which the cylinder 1' is provided.

As shown in Fig. 5, the intermediate valves, 9 10, are rotating ones, extending across the induction-ports 7 8 in a chamber .provided for them. .The intermediate valve 9 is provided with a crank, 27, and the intermediate valve 1() with a crank, 28, both being on the outside'of the cylinder. The crank 27 is pivoted to a weighted rod, 32, and the crank 28 to a weighted rod, 33, these rods resting in their normal position upon supports placed beneath their weights, as shown in the drawings, and serve to keep the intermediate valves, 9 and 10, in a position with their passages coinciding with the ports 7 and 8, respectively, so that live steam, when allowed to enter the induction-ports 7 and 8, may pass into the cylinder unobstructed. 'lhe crank 27 has also pivoted to it a rod, 34, having a slotted extension, 35, in which a box, 36, provided with an adjustingscrew, 37, Works, this adjustingscrew in the operation of the mechanism coming against the upper end of the slot in the extension. The crank 28 is provided with a similar rod, 38, having a similar extension, 39, and similar box, 40, and adjusting-screw 41. E Pivoted to shaft 42 are three levers, 43

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Y 44 45. The Iever 43 is connected by a wristpin with the box 36, and the lever 44 with the box 40, while the lever 45, through a rod, 46, is connected to a crank, 47,onashaft, 48, which receives vibratingmotion through the lever 49, receiving motion from some moving parts of the engine or pump. When the piston of the cylinder pauses at the end of the stroke at the right-hand end of the cylinder shown in Fig. 5,through the movement of the lever 49, shaft 48, crank 47, lever 45, lever 43, and connecting-rod 46, the box 36, with its set-screw 37, is caused to rise until the latter strikes the upper end of the. slotted extension of the rod 34, which, through the crank 27, rotates the valve 9 until it closes the induction-port 7, thus preventing steam from entering that end of the cylinder. As soon as the pistou starts upon its return-stroke thelever 43 is lowered through the instrumen talities that raised it, which permits the weighted rod 32 to return the valve to a position where the induction-port 7 will be open for the passage of live steam. As soon as the piston reaches the end of its returnstroke and pauses at the left-hand end of the cylinder shown in- Fig. 5 the lever 44, through the instrumentalities before described for working the lever 44, will be in turn raised, and with it the box and set-screw 41, which latter, coming in contact with the upper end of the slotted extension of the rod 33, will raise the lever 28., and through it cause the valve 10 to rotate and close the port 8. As soon as the piston begins to return again the lever 44 will be lowered through the instrumentalities that raised it, which permits the Weigh ted rod 33 to cause the valve 10 to return to the position shown in the drawings, where the port 8 is open for the passage for live steam.

It is obvious that each high-pressure cylinderis to be provided with the mechanism shown in Fig. 5 for operating the valves 9 and 10.

By means ofthe adjusting-screws 37 and 41 the point ot' contact with the bottom of the slotted extension of the rods 34 33 may be regulated, so that the intermediate valves maybe lclosed at the proper time and remain closed as long as may be required.

The slots of the bars 15, as shown in Figs. 1 and 2, and ofthe swivels 24, as shown in Figs. 3 and,4, and of the rods 34 3S, as shown in Fig.

t 5, permit of the constant movement of thentermediate mechanism that operates the valves 9 and 10, and yet allows such mechanism to operate the valves at the proper time.

In Figs. 2, 4, and 5 exhaust-ports 50 51 are shown,which also permit a cushion to be formed behind the piston as it nears the end of its stroke.

Where the duplex pumping-engine is composed of one high and one low pressure cylinder, with a tank or not between them, my invention is applied to the high -pressure cylinder.

Having thus described my invention, what Iclaim as ne\v,and desire to secure by Letters Patent, is-

1. In a duplex pumping-engine in which the main steam-valve of one engine is operated by the other engine, the combination, with each induction-port ofthe high-pressure steam' cylinder or cylinders, of an intermediate valve operated to close such port during the pause on the reversal of the movement ol' the piston, substantially as described.

2. In aduplex pumping-engine in which the main steam-valve ofone engine is operated by the other engine, the combination, with each induction-port of the high-pressure steam cylinder or cylinders, of an intermediate valve and mechanism for operating the same, substantially as described.

3. In a duplex pumping-engine in which the main steamvalve of one engine is operated by the other engine, the combination, with eachv induction-port of the high-pressure steam cylinder or cylinders, of au intermediate valve, with mechanism-for operating the same, provided with means for adjusting the opening and closing of the same, substantially as described.

4. In a duplex pumping-engine in which the IOO

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