USRE3828E - William h - Google Patents

Description

oi' the piston, as will be lluitmi guaine cient omitir.

WILLIAM H. GUILDQOF WILLIMSBURG, NEW YORK.

Letters PatentNo. 51,175,` dated November 28, 1865; reissue No. 3,828, dated February 8, 1870.,

IMPROVEMENT IN PNEUMATIC PUMPS The Bchndulbgreferred to in these Lettera Patent and `making part cl' the sarnav To all whom it may concern elated.

Figure 2 is a longitudinal vertical section on a larger scale than fig. 1 of one of the punip-cylinders.

Figure 3 is a vertical transverse section on the same sca`e as iid. 2.

Figure 4 is an inside face view of one of the cylinder-heads.

Figure 5 is a central horizontal sect-ion of the pumpcylinders and valve-chest.

. Similar letters indicate corresponding puits of the machine in all the figures.

The object of thisinvention is to provide for the effective prevention of leakage of the valves ot' air or vacuum pumps, by keeping them covered with water or wet while closed, and especially to obtain this result by combining with the cylinder a. reservoir for water, ftnd'aieindntion and eduction-lnissa-gc for such water in conjunction with thc air, which' shall be so arranged that when the eduction air-valves are closed they shall be covered with water, so as to insure the peri'ect wetting and sealing oi' such valves and their seats, thus prevellting any airiiom passing' them when in this closed position; and, to this end,

The invention consists in providing such a reservoir fol-water, and induction and eductiolepassages i'or (he same in conjunction with the air, so combined with the cylinder and piston ot' an air-pump as to produce they desired result; and in the arrangement ot' the induction and education-passages, and the chambers containing the induction and eduction air-valves; and, further, in the attachment to the induction valvechamberor chambers of the pump, between the air iiuluction-valve or valves and cy1inder,oi` a pipe or pipes, distinct from the air-induction pipe, forthe admissioiuint the pump at each stmke ot' the piston of a sutieient quant-ity of water to make up for the loss ot the quantity which is unavoidably carried out with. air 'at each stroke of the piston; and, further, in the arrangement of the airinduction chambers, so that all of the air may be expelled from them at each stroke more fully described hereinafter.

' -To-enable those skilled in the art to apply my incentre,

` titions, at', iig. 5, into two valve-chambers,

vention, I will proceed to describeit with reference to i the drawings.

`'A is the bed-plate, arranged vacuum pump-cylinders B I3, and steam-enlgine by which they are. operated. e B are cnvercd at each;

The cylinder or cylinders 1 5 end, inside ol' the cylinder-heads D, with a valvegplate,

fm, containing the ports u n of the rduction-valves 0,1

which are sita-ted in a chamber, 1', formed between the said plate and the cylinder-head by making the inside ot' the' cylinder-head concave. f

The valves o are ot'a circular or other suitable form,

and arranged in the cylinder-heads, and the portsin each plate m are arranged in aconccntric circle.

The said valves o are represented as Iliade of flexible vulcanized India. rubber, and secured at or aroundv the but opening all around the edges. v

Each cylimler-head D is provided inside with annul.u' passage-ways, s, surrounding the eduction-valve chambers r, and communicating by means ot'an opening, t.

'The said passage-way s has an outlet opening, u, (see figs. 2 and 4,) at the bottom of the cylinder-hezu1 l), where an eduction-pipe is to be attached. 'v

This pipe may lead into the water-tank, tiom which the pipes f take their water, so oit' trom the pump with the air muy bereturued to said tank. i

Each ofthe pump-cylinders has an induction vulve# chest, U, on one side thereof.

This valve-chest is divided longitudinally by a partition, c, and between Athis partition and the cylinder it is subdivided transversely by means ot' central parcont-ain the air-iiulu ,tion valves c e.

These chambers are located upon the sides of the cylinders, so that their upper portions are below the upper inner surt'acc ofthe cylinders, as a consequenceot' which, when the pistons-are appmachingelther end oi' the cylinder, the water which is in such cylinder tiows into said chambers through the openings l, thus expelling the air therefrom, and causing t w be discharged trom the cylindc" at each stroke ot' the piston.

This arrangement ofthe chambers b I1 forms an iniportant part of my invention, as it enables meto drscharge all ot' the air from the cylinder anni trom sind chambers at cach stroke oi' the piston, and thus prevent the injurious effects caused by leaving any air in such passages, the etiec-t 0i' which when nut expelled,

is tovrctard the formation of the vacuum upon the re-y turn stroke ofthe piston.

From each ot'thcse chambers b b, a port or ports in the partition a communicates with the outer or man1 induction-chamber d, and the induction-valves, which which supports the horizonmlly therewith at the top` that the water carried,v

b b, which regulate the quantity of w are composed of or laced with India rubber` or other elastic or flexible material, are iittcd or applied to these ports in such a manner as to open inward or towards the cylinder.

The said chambers b b have withihe cylinder near the en lig. 5, which are alwaysopen. v

lhe air-induction pipe is connected at x with the main indnction-chamber d To .each ot the valve-chambers b there is connected one end of a small waterpipc, f; the other end oi' whicll may dip into the water in a conveniently-az'ranged watcr-tank, from which the water is supplied tothe pump for scalingthe valves.

Each pipe fis fm'nished with a regulating cock or valve, g, and a-check-valve, 7L, thc Valve g serving to ater to be admitted, and the cheek-valve allowing the water to pass through the. pipe finto the chamber b, but preventing the escape of air and the return of water through said pipe.

E is the piston, fitted into the cylinder B, and packed in any suitable manner.

lhe piston-rode, to which thepiston E is attached, passes at one end ot' the cylinder B through the valveplate an, and the cylinder-hezul D, (see figs. 2 and 5,) which for this purpose is provided with a stutngbox, uf.

When the piston-rod c passes plate in, thatopening should. al proper packing. s

The eduction-valve o at that end of t-hc cylinder may he so titted to the cylinder as to constitute a proper packing.

As the str am-engine tllis invention, I tion of it.

'lhe pump may be attach working engine, audit may have two cylinders, as shown in the drawings, or it may have only one such cylinder, in which form it will perform as well.

When the pump is in operation, the air, entering at x into the main induetion-chamber(I, presses upon the imlnction-valve c in the chamber b communicating with thatend ofthe cylinder from which the piston is moving, and passes through the or ports l into the cylinder, while the air in fi'ont of the piston opens the eduction-valve o, at that end of the cylinder towards which the piston is moving, and passes through the ports 'n n, eduetion-chamber o* opening t, passage s, opening yu and 'ednetion-pipe, the other induction and eduction-valves being ill the mean time closed.

During the lirst few also communication ds thereof, hy ports Z I,

through the valveso he provided with represented forms no'part of shall omit a. more particular' descriped Ato any kind of well strokes of the piston after starting, the valves or cocks gin the water-npcs fare kept wide open to admit water enough to fill the inductiouvalve chambers b, and reduction-valve chambers lr, communicating with each end of the cylinder towards which the piston is moving, as the piston completes its strolte; and when such quantity ot'water has been admitted, the valves or cocks g, are partly closed to reduce the supply et' water to what is necessary to make up for what un ateaeh stroke 0f the piston. As the piston moves away from either end ofthe cylinder, the small Yquantity of water which remained in t-he cylinder between the piston and eductiou-valve plate mi, at the end of the cylinder, and which filled the corresponding induction-valve chamber b, follows the piston 'along the bottom of the cylinder, accompanied by` the small said chamber and its portavoidably passes off with the air` quantity of fresh water which enters through the ,pipe

' port or ports c, and imlnction-valves f', belonging to that end ofthe cylinder; and as the piston moves towards either en d ofthe cylinder, the water in front of it is pushed before it along the lower part of the cylinder, without interfering with the egress of air ythrough the eduction-ralve, until the piston has nearly completed its stroke, when the water, rising; in theviliminishcd space between the piston and cylimlcr-hcad, and being forced out through the ports Z and n, fills 'the induction-cliainber l) and eductionchamber c', thus expellingr thc air from the fduetion-cllaniher belonging to that end of the cylinder towards which the piston is moving.

As the piston returns, the eduCtion-valve ciosing behind it shuts in the water in the ednetioinchamber r, behind it, and so keeps the valve oet' said chambers covered with water and perfectly sealed, the water being prevented from escaping from the said chamber to the eduction-pipe, by reason ofontlet t beim,Y in the upper part of said clnnnbcr, and above 'the .alve o.

As the piston commences its movement tow; do. either end ot' the cylinder, the opening ot' the educ-tion valve o at that end allows the water to run back, by gravitation, through the ports a into the cylinder, and -so prevents its interference with the egress of the air.

What I claim as my invention, and desire to 'secure by Letters Patent, is-` 1. In combination with the cylinder, piston, and reduction-valves of an air or vacuum pump, aJ reservoir for water, and separate induction and eduet-iompassages for snch water, so arranged that the air-eduction valves, when closed, shall be covered, or nearly covered with water, substantially as and for the purpose set forth.

2. Incomhination with the cylinder, piston, and induction-chamher or chambers of an air or vacuiun pump, the pipes f for supplying water to such chainbers and cylinder, substantially as and for the purpose set forth.

3. Arranging the air-induction vaivc chambers u il, below the upper inner surface of the cylinder, so that the water which is being pushed t'orzfard by the pist-on may be forced into said chambers, and thus expel the air therefrom, substantially as and for the purposeset forth. p

4. The arrangement ofthe main airindnction chamber d, induction-vakje chambers I), imluction-valves e, and ports c and I, substantially wherebyprovision is made for covering the said in-' duction-valves wit-,h water, as the piston arrives at or approaches their respective end of the cylinder, substantially as and for the purpose 'set forth.

5. The' arrangement ot air-eductiou chambers r, passages s, and openings t and u, in relation to the eduction-valvcs in the cylinder-heads, substantially as and for the purpose set forth.

6. rlhe water-pipes fj, and check-valves h l1., applied in combina-tion with the induction-val ve chamhen ofan air or vacuum pump, to regulate the induction ot water from a suitable reservoir at each stroke of 'the pump-piston, substantially as and for the purpose set forth. t

In testimony whereof, I have signed my naine to this specification, before two subscribing witnesses.

WM. H. GUILD.

Witnesses:

J. G. JENKINs, E. H. RowLANDsoN.'

as herein described,

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