USRE2530E - Improvement in steam pumps - Google Patents

Description

Maida' R. WASHINGTUN N. PErERS, FNOT0-LITHOGRAFHE @nii-teh gratis @anni @frn Louis c. Romea AND J. GARDINERL or SPRINGFIELD, MASSACHU n SETTS, ASSIGNEES OF LOUIS C. RODIER.

Lettera Patent No. 57,188,` dated August 14, 18613;v 'reissue No. 2,530, dated'M/zrch 26, 1867.

IMPROVEMENT/ 1N STEAM PUMPS.

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TO ALL WHOM IT MAYCONCERN:

Be it known that I, LOUIS C. RODXER, of Springfield, Hampden county, Commonwealth of Massachusetts, have invented certain new and useful improvements in Steam Pumps;" and I dohereby declare that Athe following is a full and exact description thereof, reference'being had to the accompanying drawings, land to the letters of reference marked thereon. l Y Y My improvements relate to the kind of pumping engine known as direct and double-acting, consisting of ay steam engine, the piston-rod of which is continued outward and enters the water cylinder of a pump attached to the same bed with the steam cylinder, the piston of'the pump being attached to the opposite end of this piston-rod from the steam piston. It has been customary inrsueh pumping engines'to use a tappet arm attached to the piston-rod'between the two-'cylinders for the purpose of operating the steam valves, but this engine is so arranged that no tappet arm or-other outside connection between the working parts and the valve is used. By 'this arrangement Indo away with all complicated mechanism generally used to operate the steam valve, and also am able to place-the engine and pump nearer together on the hed, making'alighter and more compact machine, und one that is necessarily stronger and more durable, from the fact that the cylinders are so much nearer together that there is no chance for spring or breakage in the bed between the cylinders, and the piston-rod being shorter and unencumbered by additional weight is not so easily sprung out of lino. These` improvements relate both to the engine and pump, and consist of, in the engines, a peculiar and advantageous arrangement of steam port's-and'reservoirslin connection with the main valve and two smaller valves situated at or near the ond of the stroke of 'the steam-piston, the manner and purpose of which arrangement is more fully-showrnhereafter,A and in the pump a peculiar and compact arrangement of the water valves.' In the drawings accompanying these specifications- Figure 1 is aside view of my improved steam pump. Figure 2, an end view of the same, looking at the pump; and Figures 3 and 4: are side views of the upper and lower valve-plugs of the p ump respectively. I will rst descrbethe construction of the engine. A is the cylinder in which the piston B works, steam being let on at the two ends through the ports C C and received into these ports from the interior of the hollow v cylindrical slide-valve D, into which the steam is takenxfrom the jacket E in the valve-chest. Around this valve, through the opening I", is the valve which communicates with the jacket by means of' a similar opening, G, in its side, the jacket receiving steam from the boiler through the pipe H. After being used in the cylinder, the steam is exhausted through the ports C C, passing out into the exhaust K through the valve, which, acting like an ordinary slide valve, Iforms a connection with these ports C or C', and the exhaust port to let ofi' the steam as before it had formed a connection between the live-steam pipe and the sameport C or C.

It will be see-u `from the above description that the arrangement and operation of the main steam ports and valve is like that of an ordinary slide valve, excepting that steam is let into the `interior of the hollowvalvc, which iscyliudrical, instead of on the top of a flat slide. A f

In the arrangement of .secondary steam reservoirs, ports, and valves, for operating the main valve D, conA sist my improvements in the engine. This I will now describe: In cach end of the cylinder I form a cavity,

'L, which acts as a reservoir for the steam received from `the jacket E before mentioned throughy the port a. In

this cavity, and nearly filling it diametrically, I place a small valve, ,`communicating with the interior of the steam cylinder by means of the stem c working through'a steam-tight opening, d. Thiswalve has a small opening, c, cut in it to allow .the passage of the steam by it. From this reservoir the portf runs, leading into the valve-chest, and from the valve-chest the small exhaust port g runs, communicating with the main exhaust K, i

so that the main valve forms a piston working in its cylinder, which is the valve-chest, and operated precisely like the main piston by alternately letting in and exhausting steam at either cnd of this piston valve.

'I he operation of this engine is as `follows: The piston and valve being inthe position shown in fig. 1, steam i being let on goes into the interior of the main valve D and passes out through the port C into the cylinder,

driving the piston to the opposite end of the cylinder. When it (the piston) arrives at the opposite end of the I cylinder it strikes the stem c of the valve d, forcing it open and allowing live steam from the reservoir to pass over the Vvalve through the cut e and up through the portfintc the interior ot' the valve-chest. This starts the main valve D, which immediately travels-to the opposite end of the valve-chest, bringing it to the position shown at fig. 1 in red lines, and allows the steam to pass froin'lthe interior of the valve D into the opposite end of the cylinder, from whichk it has before entered; and, also, this motion oi'y the valve uncovers the opening of the port g, where it enters Ythe valve-chest, thus allowingl the steam which has propelled the valve D to escape. This operation reverses the motion of the piston, causing it to return to its original position, and as it starts to return .the pressure in the reservoir on the small valve g, closes it. Arriving at the opposite end, it acts on the small valve g, at that end, causing the other part to operate in a similaimanner to that described, reversing its motion again; and these operations are-repeated lalternately at each qnd of the cylinder, causing a continuous reciprocating motion of the piston.

I will n ow describe my improvements in the pump. This pump is double-acting, and has two hingedrvalves communicating with the suctionpipe and two similar valves communicating-with the delivery'pipe. Each pair of these valves, or each one singly, is placed in a plug or cylinder, which is inserted in an opening made for the purpose in the pump and fastened there in any desired manner, the object being in such arrangement to place the valve so that they may be readily removed and examined. y y

- The advantages I claim for this pumping engine, considered as a Whole and arising from the various improvements here described, united yand used in connection with each other, are: Perfect surety of operation; as it (the piston) moves to the end of the cylinder it must operate the smalll valve, thus moving the main valve hyletting on steam to it and reversing' its own motion, no dependence being placed from outside and complica-ted mechanism. Compa'ctnes's and the small number of parts, and consequently chenpness of' construction. The arr-ange ment of` the valves in. the water cylinder, which are easily removed 'for examination or change. When these valves are hung upon a plug in pairs the arrangement of the lower plug consists merely of a. single cavity communicating with the suction pipe, and having an opening on each side, which the valves alternately uncover and close, allowing `the water to How into either end of the cylinder as the piston is moved, and preventing it from being forced out at the other end inthe manner of ordinary valves in similar situations. The upper plug is formed into three apartments by a longitudinal and a lateral partition, so that the water when forced may not flow through the opposite valve hackiuto the cylinder, but may have free passage out into the delivery pipe or up 'into the air-chamber. l y f New, having described my invention, what I claim as new, and desirey to secure by Letters 4Patent, is- 1. The arrangement of secondary valves dd', ports ff, and reservoirs L L, at or near each 'end of the cylin der, operating with ythe piston B and valve D, toY reverse the motion of the piston in the manner set forth.

2. The arrangement of the Water valves of the pump, consisting of hinge valves hung singly orv in pairs i upon plugs constructed as described.

3. Constructing. the plug through which the water is forced when both valves are attached to itin the manner shown, having a longitudinal and a lateral partition, arranged substantially as set forth.

I LOUIS C. RODIER,

f J. 1l. GARDINER.

Witnesses: i

R. I. HYDE, J. R. Sii/lira.

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