US718132A - Reciprocating pump. - Google Patents

Description

PATENTED JAN-13, 1903..

F. LAMPLOUGH. REGIPROGATING PUMP. APPLICATION FILED D110. 14, 1901.

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No. 718.132. 1 Y i PATBNTED JAN. 13, 1903. P'. LAMPLGUGH.

REGIPROGATING PUMP. A PPL1oAT1oN-r1LED Dnc. 14, 1901.

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UNITED STATES PATENT Ormes.

FREDERICK LAMPLOUGH, orWiLLEsDEN, LoNDoN, ENGLAND.

RECIPRopSATiNG PUM P.

SPECIFICATION forming part of Letters Batent No. 718,132, dated January 13, 1903. Application inea December 14.19011." seria] No. 85,863; (No modem der them self-controlling in accordance with the variation of pressure that occurs in a ves-` sel arranged in connection therewith. This y vessel may be a steam-generator, in which case the variation in the steam-pressure could be utilized for the purpose of controllingthe supply of Water to the generator by the pump or for the purpose f controlling the supply of liquid fuel by the pump tothe burneremployed for heatingthe generator, or the said vessel might serve` as a reservoir for the fluid forced into it by the pump, so that when the pressure in such reservoir reached a predetermined degreeit would control the working of the pump accordingly. The pump may be of the bucket, plunger, or ram type and may be either single or double acting; but I prefer it to be of the plunger or ram type.

According to myinvention the pump-barrel is provided with a by-pass controlled by a relief-valve which is adapted to be opened automatically by means of suitable devices which are under the influence of a flexible diaphragm that is subject to the fluctuating pressure Within the aforesaid vessel. For this purpose the plunger or some other appropriate moving part of the pump is connected,

. through the intervention of suitable mechanisrn, to one end of alever having its fulcrum in a sliding piece which is adapted to be shifted against the resistance of a spring by the pressure in the aforesaid vessel acting on said diaphragm. Adjacent to the other or free end of this lever is the relief-valve, which normally remains closed by the action of a spring and lies out of the path of the free end of thelever. When, however, the slidf ing piece to which said lever is pivoted is shifted by the pressure in the aforesaid vessel rising, the fulcrum of the said lever is brought nearer to the said valve, `With the result that it is opened by the lever and permits the iiuid in the pump-barrel to be forced `delivery-valve. As the pressure in the aforesaid vessel falls tothe predetermined degree the said spring reacts and returns the sliding piece with the lever to the normal position, with the result that 'the aforesaid valve closes again and the pump forces the fluid through the `delivery-valve.

1n order that my said invention may be clearly understood and readily carried into effect, I will describe the same more fully With reference to the accompanying drawings, in which- Figure 1 is a longitudinal section, Fig. 2 a plan, and Fig. 3 an end view, of a feed-pump constructed in accordance with my invention and intended for supplying water to a steamgenerator. Fig. 4. is a transverse section on the line 1 1 of Fig. 1, and Fig. 5 is a transverse section on the line 2 2 of Fig. 1. Fig. 6 is a sectional elevation, and Fig." 7 an end elevation, showing a modification of the invention.

A is the pump-barrel; A', the suction-cham ber forming part thereof; B, the plunger or ram; C, the relief-valve; D, the valve-actuating lever; E, the sliding piece, and F its spring.

Referring more particularly to Figs. 1 to 5, the aforesaid pump-barrelAis furnished with a stufng-box d, through which the ram B works in its reciprocating movement. `The said ram is provided with a connecting-rod b, hinged thereto at b', its freeend being connected to the crank-shaft of any suitable form of motor or engine by means of the roller-bearing b2. Pivotally connectedwith the said rod l? is an arm b3, the free end of which :is coupled by a double link b4 to a rod d, adapted to slide in a stuffing-box A? on the suction-chamber A'. The said arm?)3 is also, by means of a double link b5, connected at a point b with a 'fixed bracketA8 on the pump-barrel A. During the reciprocations of the ram B the arm h3 oscillates about the point 197 and imparts rectilinear reciprocating movement to the said rod d. The innerend of this rod is coupled to the valve-actuating lever D, which is located in a vertical position Within the suction-chamber A and is pivotally connected at d to a rod d2, which Works IOO in a stuffing-box A4 and is connected with the sliding piece E. This sliding piece is in the form of a flanged head, upon one side of which bears the spring F, contained in a cap o r casing f. At the other side of said head is a flexible diaphragm f', which is acted upon by the pressure of the steam or other fluid passing to it through a passage f2. The spring-casingf is contained within-an extension A5, with which the suction-chamber A is provided. The said spring-casing is maintained in place by means of a hinged arm f3, extending transversely across and bearing against the end of said casing. This arm f3 is hinged to a screw f4, that passes through a lugf5 on saidv extension A5 and receives at its extremity a screw-nutf. By turning this nut in one or other direction the position of said hinged arm f3 can be adjusted sol as to approach toward or recede from the casingf, and thereby cause the spring it contains to be placed under more or less pressure, whereby said spring will exert more or less resistance to the movement of the said sliding piece or head under the influence of the steam or other pressure acting thereon through the diaphragm. The said relief-valve C is located near the lower part of the suction-chamber in the by-pass cx, leading from the pump-barrel to the suction-chamber, and is normally kept closed bya spring c, inclosed in a detachable plug c. The said valve has guiding-wings c2 and is furnished with a prolongation c3, which lies opposite the free end dsof the said lever D. When the parts arein the position represented in Fig. l, the fulcrum d of this lever D is situated too far away from the prolongation o3 of the relief valve to enable the free end of the saidlevertostrike thelatter,and consequently the Valve remains closed by its spring. If, however, the sliding piece and its rod cl2 are shifted toward the left by the steam or other pressure acting on the diaphragm f', then the fulcrum of the lever D will be brought nearer to the said prolongation of the relief-Valve, with the result that said valve will be opened by the free end of the lever and a portion of the liquid in the pu nip-barrel be allowed to pass back into the suction-chamber during a portion of the inward stroke of the pu mp-ram. A diminished quantity of liquid will therefore be delivered by the pump. The duration of time that the -said Valve C remains open, and therefore the quantity ot' liquid delivered by the pump during the stroke of the ram, will depend upon the position of the fulcrum d', or, in other words, upon the degree of pressure acting upon the diaphragm and the sliding piece. So long as the said reliefvalve remains closed the ram will draw liquid from the suction-chamber into the pumpbarrel past the valve G and will discharge liquid from the pump-barrel past the valve H through the delivery-outlet h, Fig. 5. The inlet to the pump is through the pipe I. The said suction-chamber A is preferably provided with asecond pump-barrel A to receive a ram AXX, that can be actuated by hand through the intervention of a lever A6 when the apparatus is to be worked independently of the ram B, in which case the liquid is forced from the suction-chamber A through the passage 71X and past the delivery-valve H into the pipe h.

By this construction of feed-pump it will be possible to accurately regulate the amount of feed-water entering the steam-generator in proportion to the amount of steam withdrawn from the generator for working the motor or engine, thereby insuring a perfect balance or ratio between the feed-water forced into the generator and the pressure of steam therein.

In the modified form of the apparatus illustrated by Figs. 6 and 7 the said sliding piece E, spring F, and diaphragm f' are located immediately below the suction-chamber A', and the rod d2, to which the valve-actuating lever D is fulcrumed, is coupled to the rod e of the sliding piece by means of a double link e', pivoted at e2. This arrangement permits of the apparatus occupying much less space lengthwise than in the arrangement illustrated in the preceding figures of the drawlngs. l

What I claim, and desire to secure by Letters Patent of the United States, is-

l. In a pump, the combination with the pump-barrel, a ram adapted to reciprocate therein with uniform strokes, and inlet and delivery valves; of a relief-valve, of a bypass from the pump-barrel controlled by said relief-valve, and of means for varying the period of lift of the relief-valve in relation to the stroke, and thereby gradually and automatically diminishing the supply of water as a predetermined pressure is reached.

IOO

2. In a pump, the combination with the pump-barrel, a ram adapted to reciprocate therein with uniform strokes, and inlet and delivery valves; of a relief-valve, of a bypass from the pump-barrel controlled by said relief-valve, of a flexible diaphragm subject on one side to the fluctuating pressure of a fluid, and of an oscillatory lever for actuating said relief-valve to a greater or less extent in accordance with the extent to which the said diaphragm is shifted, substantially as and for the purpose specified.

3. In a pump, the combination with the pump-barrel, a ram adapted to reciprocate therein with uniform strokes, and inlet and delivery valves; of a relief-valve, of a bypass from the pump-barrel controlled by said relief-valve; of a flexible diaphragm subject on one side to the fluctuating pressure of a fluid, of a lever adapted to actuate said relief-valve, of a movable piece carrying the fulcrum of said lever and located on the opposite side of said diaphragm in a position to be actuated thereby, and of means for operating said lever from thepump-ram, substantially as and for the purpose specified.

4:. In a pump, the combination with the pump-barrel, a ram adapted to reciprocate IIO therein with uniform strokes, and inlet and delivery valves; of a relief-valve, of a bypass from said pump-barrel controlled by said relief-valve, of a fiexible diaphragm subject on one side to the fluctuating pressure of a iuid, of a lever situated within the suctionchamber of the pump and of a sliding piece carrying the fulcrum of said lever and located on the opposite side of said diaphragm to that on which the pressure acts and in a position to be actuated by said diaphragm, of a prolongation on the relief-valve lying in the path of the free end of said lever, and of lever mechanism coupling the connecting-rod of the pump-ram with said lever for rocking the latter about its fulcrum, substantially as and for the purpose specified.

5. In a pump, the combination with the pump barrel, the uniformly reciprocating ram, the inlet and delivery valves, the reliefvalve,the flexible diaphragm,the sliding piece and means for transmitting the movements of the sliding piece to the relief-valve; of a spring for resisting the movement of the sliding piece, of a casing inclosing said spring, of a pivoted transverse arm adapted to bear against said casing, of a hinged screw on the free end of said pivoted transverse arm, of a lug on the framing ofthe pump with which said screw engages, and of a nut on said screw for adjusting the position of the pivoted transverse arm relatively to the spring-casing substantially as and for the purpose specified.

6. In a pump, the combination with the pump barrel, the uniformly reciprocating ram, the inlet and delivery valves, the diaphragm, the sliding piece and its spring, and the reliefvalve and the by-pass from the pump-barrel to the suction-chamber of the pump; of an oscillatory lever located in the said suction-chamber so thatits free end is capable of actuating said relief-valve, of a rod extending from said sliding piece into said suction-chamber and receiving the fulcrnm of the lever, of a stufling-box on said suction-chamber through which said rod works, of a sliding rod connected with the upper end of said lever, of a stuffing-box on said suction-chamber for the sliding rod to work in, of a link connecting said sliding rod with an arm hinged to the connecting-rod of the pump-ram, and of a link connecting said hinged arm at a point intermediate of its ends to a lixed point on the pump-framing, substantially as and for the purpose specified.

In testimony whereof I have hereunto set my hand, in presence of two subscribing witnesses, this 21st day of November, 1901.

FREDERICK LAMPLOUGII. Witnesses:

Tiros. PfWARDLE, WALTER J. SKERTEN.

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