US1385062A

US1385062A - Consin

Info

Publication number: US1385062A
Authority: US
Publication date: 1921-07-19
Anticipated expiration: 1938-07-19

Description

B. s. AIKMAN.

PUMPING SYSTEM.

APPLICATIONFILED JULY 21.1917- RENEWED APR. 7, 192i.

Patented July 19, 1921.

a SHEEN-SHEET 1.

B. S. AIKMAN.

PUMPING SYSTEM.

APPLICATION FILED JULY 27,1911. RENEWED APR. 1, 1921.

Patented July 19, 1921.

3 SHEE'ISSHEET 2.

B. S. AIKMAN.

PUMPING SYSTEM.

APPLICATION FILED JULY 27.19l7 RENEWED APR-7,1921.

1,385,062. Patented July 19, 1921. 3 SHEElS-SHEET 3. 5 MT asfig. 5

M 'il 55 55 Q6 5:1 98 Q9 4 g5 l /5O 0 I n c as M 6am Q2 QB p 6'7 58 6Q 65 I g I ,I I F 66 ,m, l 2 60 6'5 68 \\\5\ x\ 3 UNITED STATES PATENT OFFICE.

BURTONS. ,AIKHAN. 0F MILWAUKEE, WISCONSIN, ASSIGNOR. T0 NATIONAL BRAKE &

ELECTRIC COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WIS- OONSIN.

PUMPING SYSTEM.

. Specification of Letters Patent.

Patented July 1 9, 1921.

Application filed July 27, 1917, Serial No. 183.095. Renewed April 7, 1921. Serial No. 459,336.

To all whom it may concern.

l e it known that I, BURTON S. AiKuaN, a citizen of the United States, residing at Milwaukee. in the county of Milwaukee and State of \Visconsin. have invented a certain new and useful Improvement in Pumping Systems, of which the following is a full. clear. concise, and exact description, reference being had to the accompanying drawings. forming a part of this specification.

Mv invention relates to pumping systems. particularly of that class. which employ a pump cylinder submerged in the water of the well or other source of supply which discharge directly to the consumption system of a residence or the like without the employment of a storage reservoir. In systems of this character the water is supplied fresh from the well, the well itself serving as the only reservoir.

The present invention is directed to a simplification of pumping systems of this class by disposing the controlling mechanism for the compressed air which operates the pump at the head of the well.

The entire system is controlled by the demand for water and on this account systems of this type have generally been designated as faucet control systems.

Most prior systems have depended upon level controlled devices within the pump at the bottom'of the well for shifting the air valves to operate the pump.

In my prior application. Serial No. 193,094. filed July 27th. 1917. I have described a system in which the shifting of the air valves is operated virtually by measuring thewater discharged from the pump. According tothe present invention the air valves for operating the pumps are shifted by measuring the air demanded by the pump for operation.

In carrying out my invention I employ a receptacle which is constantly replenished from a source of compressed air and this receptacle or reservoir is drawn upon for each stroke of the pump. As the air is drawn from the reservoir the pressuie in the reservoir drops and when this pressure has dropped to a sutlicient degree connection etween reservoir and the pump is cut off and the reservoir is again replenished with compressed air at a higher pressure. During the, time that the reservoir is being replenished the pump is filling with water. It is therefore apparent that the only mechamsm necessary to control the operation of the pump is a simple pressure controlled air valve.

It obvious that the valve may be employed for controlling the admission of air directly to the pump or it may operate through a relay mechanism as for instance through a cylinder and plunger for operating a larger control valve which in turn does the actual work of admitting and exhausting to and from the pump cylinder.

In order that those skilled in the art may be fully acquainted with the nature and scope of my invention I shall describe a. specific embodiment of the invention in connection with the accompanying drawings which form a part of the present specification.

Figure 1 is a diagrammatic layout of an embodiment of my invention;

Fig. 2 is a fragmentary diagram illustrating the manner in which the admission and exhaust of air to and from the pump cylinder is controlled by intermediate operating means and a control valve instead of directly from the master valve;

Fig. 3 is a diagram similar to Fig. 2 showing a further modification;

Fig. 4 is a diagrammatic layout of a system operating on a slightly different principle from the system shown in Fig. 1, the conduit for supplying compressed air to the reservoir instead of being cut through the master valve passes directly to the auxiliary reservoir through a restricted opening which controls the speed of recharging the auxiliarv tank or reservoir;

ig. 5 is a longitudinal section of the pump cylinder with parts broken away: and

Fig. 6 is a cross sectional view of the pressure controlled valve.

In the diagram of Fig. 1 the tank 1 is the main tank or reservoir which is maintained at the required pressure for supplying compressed air to the pump cylinder 2. The tank 1 may be automatically replenished by starting the compressor whenever the pressure in the main tank falls below a certain predetermined value. If desired this tank may be recharged intermittently by manual control.

The pump cylinder 2 is submerged in the water at the bottom of the well. It is provided with water discharge pipe 3 which is connected to an air spring 1 at the head of the well which equalizes the water pressure in the pipe 5 and at the faucets.

The pipe 5 leads to the consumption system of a residence or the like. Opening of the faucets of the consumption circuit automatically starts the pump 2 and water is discharged through the pipe 3 and flows out of the faucets through the pipe The air spring 1 consists of a tank of suitable capacity, the upper part of which is filled with compressed air, as by means of the pipe 6 and the valve 7 which connect to the main tank 1. The valve 7 is employed to admit suflicient compressed air to the top of the air spring 1 to cause proper operation of the air spring. If desired a reducing valve for automatically admitting air to the tank 4; may be employed. The air spring 4 operates as an auxiliary pumping device to the extent of smoothing out or filling in the intervals or gaps between successive strokes of the pump 2.

The pump 2 comprises a head member 8 and a foot member 9 having a barrel 10 between them. The head member 8 contains a passageway 11 which communicates at its upper end with the water discharge pipe 3 and communicates at its lower end with the axial pipe 12 through which the water is discharged from the barrel 10. At the lower end of the pipe 12 a valve casing 13 is secured, this valve casing being in turn connected to the foot member 9 by means of the central bolt 14. The valve casing 13 contains a valve member 15 which serves as a check valve for the pipe 12 and the pipe 3. Passageways 16 to the valve casing 13 communicate with the lower end of the pump barrel 10. The foot member 9 comprises a foot valve 17 controlling passageway 18 which communicates with the outside of the pump cylinder through the conical screen 19' which is held in place by the central bolt 14:.

The valve casing 13 has a head member 20 joined to the barrel 10 by means of the packing 21 and having valve passages 22 through said head member. A float control valve 23 is adapted to coiiperate with the valve passage 22 to close off the same in case the level of water in the pump barrel. 10 should go so low as to endanger a blowover.

The float controlled valve is normally submerged in the water within the barrel 10 and is held against rising by means of the pins 2 1. The float control valve member 23 normally does not move but remains against the pins 24, neither rising nor falling. In case of an excessive drop in the level of the water which would endanger a blow-over the valve 23 is permitted to drop and close off the valve passages 22, thus preventing a blow-over which causes an interruption of operation and loss of compressed air.

The head member 8 contains a passageway 26 which communicates with the interior of the barrel 10 and which is connected to the air supply pipe 27. The supply of air through the pipe 27 is controlled by the valve 30. This valve 30 controls the admission of compressed air, from the tank 1 to the auxiliary tank or reservoir 31 and controls the passage of air from the auxiliary reservoir 31 to the pump cylinder 2. The auxiliary reservoir 31 is connected to the valve 30 by means of the pipe 32. The valve30 is connected to the main tank 1 by means of the pipe 33 which is controlled by the valve 34. As will be explained later the function of the valve 34 is to limit the maximum rate of passageof air from the main tank 1 to the auxiliary tank 31.

The structure of the valve 30 is shown in detail in Fig. 6.

The valve 30 is inclosed by a cover 35 fastened upon a base plate 36 which in turn is bolted to the valve frame 37. An air cylinder 38 is mounted on the main valve frame; this cylinder communicates with the auxiliary tank 31 by way of the pipe 32 and communicates with the air pipe 27 to the pump by way of the pipe 39, the T 4L0, pipe 41 and valve passage 42. The cylinder also communicates with the supply pipe 33 which is connected to the main reservoir 1 by way of the valve passage 43, the valve passage 44, T 40, and pipe 39. The cylinder 38 is provided with a piston member 45 which piston member connects with a movable collar 46 by way of the pins 47; this collar engages the coiled spring 48, the other end of which Spring is held by means of the cap or disk 49 and the bolt 50. The collar 46 is provided with a sleeve 51 which guides the collar upon the bolt 50. An auxiliary spring 52 lies inside of the main spring 48 between the collar 46 and the cap 49.

A toggle lever 53 is pivoted at 54 to the main frame 37 of the cylinder 38 and has a. pin 55 lying in a notch in the collar 46. The other end of the toggle lever 53 is pivoted to the shorttoggle lever 56 by means of the pin 57.

Theshort toggle lever 56 is provided with a pin 58 which is connected to a pin 54 by means of a spring 95 shown in dotted lines in the drawing, which tends to snap the short lever arm 56 to one side or the other of the pin 57 by which it is pivoted to the longer arm 53. The short'arm 56 bears a spring finger 59 which plays between two valvestems 60 and 61. The valve stem 60 has a reduced portion 62 by which it is connected to the valve 63. The reduced portion 62 passes through a port 64 between the pipe 27 leading to the pump and the exhaust passa 'e shown in dotted line at 65.

The toggle spring 95 joining the pins 54 and 58 presses the finger 59 normally against the stem 60 and holds the valve 63 to cover the port 42 and to open the exhaust port 64 between the pump 2 and the exhaust passage 65. The pump 2 is thus free to fill with water.

The valve stem 61 is connected to a valve 66 which governs the valve passage 43 between the compressed air admission pipe 33 and the supply pipe 39 for supplying air to the auxiliary reservoir 31. IVhen the valve 66 is in the open position as shown in the drawings leakage past the reduced portion of the stem is. prevented by the rear part of the valve seating against a valve seat 67. \Vhen the valve 66 closes the port 43, leakage of air out of the tank 31 is prevented by means of a small ball check valve 68.

The operation of the system shown in Fig. 1 is as follows: Assumin that the parts are in the position shown in igs. 1, 5 and 6, the air pipe 27 to the pump 2 communicates with the exhaust passage 65 by way of the port 64. The pump 2 fills with water and at the same time air is flowing through the pipe 33 through the passage 43, passage 44,

pipes

39 and 32 to the auxiliary tank 31. When sufiicient pressure has been accumulated in the auxiliary reservoir 31 the piston 45 is moved to the right, as shown in Fig. 6, against the tension of the springs 48 and 52. As the piston 45 moves to the right the spring finger 59 is continuously pressed in engagement with the valve stem and finally when the toggle formed by the

levers

53 and 56 have been pushed past the center line, the spring, not shown. slips the spring finger 59 over against the valve stem 61. This moves the valve 66 against its seat closing off the port 43 and shutting off commu nication between the compressed air supply pipe and the auxiliary reservoir 31. At the same time the valve 63 is moved over against the seat 64 cutting off the exhaust passage 65 and admitting air from the auxiliary tank 31 to the pump 2. The water is driven out of the pump by the pressure of r the air on top of the level of the water. The

water moves up through the pipe 3. part of it moving into the air spring 4 and part of it through the pipe 5, to the consumption system.

As soon as substantially a full stroke has been made by the pump, the pressure of the air in the tank 31 will have been reduced to a certain value where the springs 48 and 52 move the piston 45 to the left. until the toggle arm 56 is moved past the center and swings over so that the finger 59 engages the valve stem 60 forcing the valve 63 against its seat to close the passage 42.

This completes the cycle of the pump. It is obvious that the valve 30 may be employed as a master valve to control a relay device operating on a larger valve if so desired. This relay device may be operated by means of a plunger rod, a column of compressed air or a column of liquid.

In Fig. 2 I have illustrated the manner in which the valve 30 may be employed as a master valve to operate the piston in the cylinder 71 which piston is connected by means of a long rod 72 to a valve member 7 at the bottom of the well near the pump 2. The valve 7 3 controls an admission port 7 4 for admitting air from the pipe 7 6 to the pipe 77 which communicates with the pump 2. The pipe 7 6 connects the cylinder 71 with the valve casing 7 8 and communicates with the main reservoir 1 by means of the pipe 79 which may be connected directly to the reservoir 1 or may be connected to the pipe 33. The valve casing 78 is connected to the pipe 7 7 by means of a union 80 having a funnel shaped opening at the top for guiding the casing 78 into the union.

The connection of the system employing this type of relay control valve is as follows: The pipe 27 is connected in place of the pipe 27 to the master valve 30 and the pipe '79 is connected to the tank 1 by way of the pipe 33 and the valve 34. The pipe 79 is connected to the auxiliary reservoir 31 as by means of a T placed in the pipe In Fig. 3 I have illustrated another manner of operating a relay controlled valve by means of a column of compressed air. The pipe 27 is connected to an operating cylinder 81 which has a movable piston to shift the valve 82. This valve serves to control the admission port 83 and the exhaust port 84 for admitting compressed air to the pump 2 by way of the pipe 85, port 83. pipe 86, or permitting the air to exhaust from the pump 2 by way of the pipe 86 and the exhaust port 84. The exhaust port 84 is formed in the bottom wall of the cylinder 81 and has an annular scat which is engaged by the valve member on the lower side of the piston. In this modification the pipe 27 is connected to the master valve 30 instead of the pipe 27. as shown in Fig. 1, and the pipe is connected to the auxiliary reservoir 31 as by means of a T connection in the pipe In Fig. 4 I have illustrated a modification of the system shown in Fig. 1 in which the main reservoir 1 is connected directly to the auxiliary tank 31 through the pipe 87 and the valve 88. The valve 88 comprises a restricted graduated orifice through which the compressed air from the tank 1 passes to recharge the auxiliary reservoir 31. The valve 90 is constructed the same as the valve 30, shown in detail in Fig. 6, the admission valve (36 being unemployed-in this system and being entirely'idle. The operation of this system is as follows:

Air flows from the main reservoir 1.

ter is driven out of the pump cylinder by way of the discharge pipe 3, part of itgoing to the air spring 4; and part to the discharge main 5, thence out by way of the faucets or other openings. Compressed air continues to flow through the orifice 88 but the pressure in the auxiliary reservoir drops due to the greaterrate at which air is drawn from the auxiliary reservoir 31 for operating the pump Consequently the pressure upon the piston 45 in the valve 90 is so far reduced that the springs 48, 52 move the piston to the left, as shown in Fig. 6, closing the admission port 42 and opening the exhaust port 6% to the pump 2. The pump 2 then fills with water and at the same time the pressure builds up in the auxiliary reservoir 31 so that by the time that the pump has filled with water or shortly thereafter the pressure has again built up in the auxiliary reservoir 31 for another stroke of the pump.

It is obvious that the valve 90 may be employed as a master valve and another controlling valve may be operated by a relay mechanism for admitting compressed air to and exhausting air from the pump. The system shown in Fig. a is better adapted for open pumping than for faucet control. The reason for this is because of the relatively fixed nature of the orifice 88. A definite time interval is required to fill the tank 31 with a given pressure of air in the main reservoir 1 and a given size of orifice for the admission opening. So long as the system is operated at a speed such that a working stroke of the pump will lower the pressure in the tank 31 to such a point that the valve operates before the pump cylinder is empty,

' the system will work properly. If the opening of the faucets is so small as to permit the pressure to build up within the tank 31 as rapidly as it is withdrawn to operate the pump, the valve 90 will not be thrown over and as aconsequence a blow-over in the system would occur.

The orifice 88 must be so small that the 7 pump cylinder 2 will always have time to fill before the auxiliary reservoir 31 is recharged. Smnlarly 1n the systems of Figs. 1, 2 and 3 the valve is open far enough only to insure that the pump 2 will always be .filled before the auxiliary reservoir 31 is recharged with compressed air.

Briefly my invention contemplates the operation of a pumping system according to the following operation: a a

The auxiliary tank accumulates pressure while the pump accumulates water. The

parts are so proportioned that the pump always fills before the auxiliary tank does. Then when the auxiliary tank is filled so that its pressure is brought to the proper value, the auxiliary tank and the pump are put into operative communication, the air in the reservoir expanding and driving .the water out of the pump. The expansion is accompanied by a drop in pressure in the tank. This drop of pressure is employed to cause the valves to shift cutting off the reservoir from the pump and exhausting the air from the pump and permitting the tank to fill with air from the source of compressed air.

A highly important aspect of the invention is the feature-of expansion of the motive fluid. This permits of greater economy in the use of compressed air. It provides a positive control of the valves. It permits a greater working range in the pressure of the air in the main tank. It provides other apparent advantages. 7

I consider that the invention provides a novel method and claim the same broadly.

I claim:

1. A pump cylinder, a source of compressed air, an air tank, a restricted passageway between the source of compressed air and the tank, a pressure controlled element subject to the pressure in the tank and valve means controlled by said element governing the admission and exhaust of motive fluid to the pump.

2. In combination, a pump cylinder, a main air tank, an auxiliary air tank, a connection between said tanks, a connection be-- tween the auxiliary tank and the pump, a pressure controlled element constantly subject to pressure in the auxiliary tank and valve means controlled by said element gov erning the admission and exhaust of motive fluid to and from the pump.

3. In combination, a pump cylinder, a source of compressed air, means for conveying air in measured quantities from the source to the pump cylinder, said means having a valve controlling the admission of air to and exhaust from the pump cylinder, and means subject to the decrease in pres sure of the measured quantities at each stroke for connecting the pump to exhaust.

4. In combination, av pump cylinder adapted to be submerged in the water at the foot of the well, an air tank at the head of the well, a valve for admitting air from the tank to the pump cylinder, and pressure controlled means governed by the expansion of the air in the tank and the consequent reduction of pressure for shuttin off the connection between the tank and t e pump cylinder.

5. In combination, a main tank, an auxiliary tank, a pump operated by air from the auxiliary tank, valve means subject to the expansion and consequent reduction of ressure of the air in the auxiliary tank for intermittently admitting air to the auxiliary tank from the main tank.

6. In combination, a main tank, an auxiliary tank, a pump cylinder, a connection between the main and auxiliary tank, a connection between the pump and the auxiliary tank for delivering working fluid to the pump cylinder, and valve means constantl subject to the pressure in the auxiliary tank for governin said connections.

7. In combination, a pump cylinder, a closed distributing system having manually operable outlets connected to said 0 linder, a source of compressed air, means or conve in air from the source to the pump cy in er, a controlling valve governing the admission of air to and exhaust from the pump, an operating element for said control valve, and air measuring means governed by the expansion of the air conveyed to the pump for controlling said operating elements;

8. In combination, a main tank, a pump cylinder adapted to be submerged in the water at the bottom of the well, an auxiliary tank at the head of the well, an air pipe running from the auxiliary tank to the pump, a valve in said pipe, a pipe from the valve to the main tank and means subject to the pressure in the auxiliary tank for operatin the valve.

9. In com ination, an auxiliary air tank, a cylinder connected to said tank, a supply pipe connected to said cylinder, a valve in said suplply ipe, a pum an air pipe between t e cy inder and t e pump, a valve in said air pipe, a piston in said cylinder, and operating means subject to the move: ment of the piston for opening and closing said valves.

10.'In a pumping system, an auxiliary tank, a pump, a source of compressed air, a pressure cylinder'connected to the tank, a supply pipe between the source of compressed air and the auxiliary tank, an air pipe between the auxiliary tank and the pump, a valve for the supply pipe, and a valve for the air pipe, a piston in said pres sure cylinder, an operating toggle for operating said valve, and spring means for throwing the toggle from one side to the other to operate said valves alternately in accordance with the rise and fall of pressurein said auxiliary tank.

11. In combination, a pump barrel, a head closing off the top of the barrel, said head comprising a water outlet passageway and an air passageway, said water outlet passageway having an interior opening axially of said head, a foot member closing the end of the barrel, a central valve cage, a pipe between the axial openings of the water outlet passageway and the valve cage and a central bolt passing through the foot member and bein secured to the valve cage.

12. In combination, a pump barrel, :1 head closing off the top of the barrel, said head comprising a water outlet passageway and an air passageway, said water outlet passageway having an interior opening axially of said head, a foot member closing the end of the barrel, a central valve cage, a pipe between the axial openings of the water outlet passageway and the valve cage and a central bolt passing through the foot member and being secured to the valve cage, and a float controlled valve at the lower end of the barrel controlling the communication of the u per end of the barrel with the interior of t e valve cage.

13. In combination, a main tank, an auxiliary tank, an air spring, a pump submerged in the water at the bottom of the well, a connection between the pump and the auxiliary tank, a pressure controlled valve in said connection governing the admission and exhaust of motive fluid to and from the pump, said valve being located at the head of the well adjacent said auxiliary tank and a discharge pipe between the pump and the air s ring.

14. In com ination a source of compressed air, a measuring tank, a pump cylinder, means for conducting air from the source to the measuring tank, means for conducting air from the measuring tank to the pump cylinder, valve means governing both of said conducting means, and a pressure controlled element subject to the pressure in the measuring tank for controlling said valve means.

15. The method of controlling a pumping system of the class described which consists in accumulating a supply of motive fluid at a predetermined pressure, sufficient to make only one stroke of the pump, accumulating a supply of liquid to be pumped, causing the accumulated sup 1y of motive fluid to engage the accumuated supply of liquid, then moving the liquid by the expansion of the motive fluid, and then disengaging the motive fluid from the liquid by the drop of pressure in the motive fluid caused by said expansion.

16. In combination, a pump cylinder, a source of compressed air, an air tank, a restricted passageway between the source of compressed air and the tank, a pressure controlled element subject to the pressure in the tank, valve means controlled by said element governing the admission of motive fluid to the pump from said tank to discharge fluid from said cylinder.

17. In combination, a pump cylinder, a normally closed distributing system connected to said cylinder, said system having manually controllable delivery outlets, a source of compressed air, an air tank, a restricted .passageway between the source'of compressed air and the tank, a pressure con trolled element subject to the pressure in the tank, and valve means controlled by said element governing the admission and exhaust of motive fluid to and from the pump.

18. In combination, a pump cylinder, a source of compressed air, an air tank, a restricted passageway betweenthe source of compressed air and the tank, a passageway between the air tank and the cylinder, a pressure controlled element operableby accumulation of pressure in said air tank for connecting the air tank to the pump cylinder to discharge liquid therefrom. I i

19. In combination, .a pump cylinder, a source of compressed air, an air tank, a restricted passageway between the source of compressed air and the tank, a passageway between the air tank and the cylinder, a pressure controlled element operable by accumulation of pressure in said: air tank for connecting the air tank to the pump cylinder to discharge liquid therefrom, a delivery pipe communicating with the cylinder, and a manually controllable delivery orifice for said pipe, said pump f and connected.

parts being organized to cut off communication between the source of compressed air and the air tank when the delivery outlet is closed.

20. In rombination, a pump cylinder, a main air tank, an auxiliary air tank, a conncction between said tanks, a connection between the auxiliary tank and the pump, a pressure controlled element subject to'pressure in the auxiliary tank and valve meansv controlled by said pressure element governingthe connection between the auxiliary tank and? pump. 4

21. In combination, a pump cylinder, a source of compressed air, an auxiliary air tank, a restricted passageway between the source of compressed air and the tank, a connection between the tank and the pump,

valve means governing said latter connec' tion, a pressure controlled element subject to the pressure in the auxiliary tank, the above mechanism being organized to connect the auxiliary tank to the pump to discharge liquid therefrom When'the pressure in said tank has attained the predetermined value.

22. In combination, a pumpv cylinder, a

source of compressed air, an auxiliary tank,"

a restricted passageway between the source of "compressed air and the tank, valve means tending normally to cut oil communication between the auxiliary'tank and the pump cylinder and valve means governing the exhaust of motive fluid from the pump cylin der when the pressure in the tank has dropped to a predetermined minimum value.

23. In combination, a pump cylinder, a main air tank, an auxiliary ,air tank, a restrictedpassageway betweensaid tanks, a

)HHIIC linder connectin means between the pump cylinder and the auxiliary air tank, pressure-operated means actuated uponthe accumulation of a predetermined maximum pressur in the tank for disconnecting the auxiliary tank-from the main tank and connecting the-same to the pump cylinder, said means being. actuatedupon a predetermined, minimum pressure' in said auxiliary .tank for disconnecting the auxiliary tank from thepump' cylinder, and for connecting the pump cylinder to exhaust 24.. In combination, a pump cylinder, a main tank, an auxiliary tank, a restricted communication between said main tank and said auxiliary .tank, connecting means between th pump cylinder and-:the auxiliary tank, means subject .to apredetermined maximum pressure for establishing the connection between-the auxiliary tank and the pump cylinder, said means being subject to apredeteruiined minimum pressure in the auxiliary tank for disconnecting the auXiliary tank from the pump cylinder and'connee-ting the punipcylinder' to-exhaust; 1

25. In combination, a main tank, an aux iliary tank, a pump operated by air from the auxiliary tank, a restricted connection between the main' tank and the auxiliary tank. valve means subject to the expansion and consequentreduction in pressure of air in the auxiliary tank on a discharge stroke of the pump, said means being operable to admit air to theauxiliary tank from the main tank. 26. In combination, a main tank, an auxiliary tank, a pump operated by air from the auxiliary tank, a restricted connection betweenthe main tank and the auxiliary tank;

valve means subject to-tlie expansion :and.

consequent reduction in pressure of air "in controllable delivery outlets for said sys-' tem", the openingand closing of said outlets controlling the operation of the pump;

27. In combination, a'main tank, an aux iliary'tan'k, a restricted communication between saidtanks, apumpcylinder, a closed distributing system connected to said pump cylinder, said distributing system having normally closed manually operable outlets, a connection between the pump and auxiliary tank for delivering compressed air to the pump cylinder, and valve means subject to the pressure in the auxiliary tank for governing said connection.

28. In a pump, a pump cylinder, a main tank, an auxiliary tank, a connection between the main tank and the auxiliary tank, said connection having a restriction governing the flow of motive fluid into the auxiliary tank, a connection between the auxiliary tank and the pump cylinder, a device subject to pressure in the auxiliary tank and a valve operable by said device, said valve controlling the connection between the auxiliary tank and the pump cylinder.

29. In combination, a pump cylinder, a main tank, an auxilia tank, a connection between the main tan and the auxiliary tank, said connection having a restriction governing the flow of motive fluid into the auxiliary tank, a connection between the auxiliary tank and the pump cylinder, means moved outwardly under pressure of the air accumulated in the auxiliary tank for connecting the auxiliary tank to the pump cylinder, said means being moved inwardly under a minimum pressure in the tank for connecting the pump cylinder to exhaust.

30. In combination, a pump cylinder, a main tank, an auxiliary tank, a restricted connection between said tank, an exhaust for the pump cylinder, valve means governing alternate connection of the pump cylinder to the auxiliary tank and to exhaust,

' pressure operated means subject to high pressure in the auxiliary tank to operate the valve means to connect the pump to the auxiliary tank and subject to low pressure in the tank to operate the valve means to connect the pump to exhaust.

31. In combination, a source of motive fluid, a measuring tank for motive fluid, a pump, a connection between the measuring tank and the pump, and valve means subject to the pressure in the tank for controlling said connection.

32. In combination, a pump cylinder, a source of motive fluid, means for drawing a limited charge of motive fluid from the source and applying it to the pump cylinder to execute a single discharge stroke of the cylinder, said means comprising a measuring vessel and a controlling valve governing the connection of the pump cylinder alternately to the measuring vessel and to exhaust, and means subject to the pressure of the measuring chamber for operating said controlling valve.

33. In combination, a main source of motive fluid, a pump cylinder adapted to be submerged in the liquid in the well, a tank at the head of the well, a valve for alternately connecting said pump to the tank for a discharge stroke and to exhaust for a filling stroke, and pressure controlled means governed by the drop of pressure in the tank due to expansion of the motive fluid for operating the valve mechanism to connect the pump cylinder to exhaust.

34. In combination, a source of motive fluid, a measuring tank, a pump cylinder, a valve for connecting the pump cylinder alternately to the measuring tank and to exhaust, and a pressure element subject to decreased pressure in the measuring tank for operating the valve to connect the pump cylinder to exhaust.

35. In combination. a pump cylinder adapted to be submerged in the water at the :font of the Well, an air tank at the head of the well, a valve for admitting air from the tank to the pump cylinder, and pressure controlled means governed by the expansion of the air in the tank and a consequent reduction of pressure for operating said valve to shut off the connection between the tank and the pump cylinder.

36. In a pumping system, the combination of a main source of motive fluid, a chamber for accumulating a limited supply of motive fluid sutficient only to make one stroke of the pump, a pump comprising a pumping chamber adapted at each stroke to accumulate a predetermined quantity of liquid, a valve controlling the application of the limited supply of motive fluid only to the liquid in the pumping chamber to drive the same out of the chamber, and a pressure controlled valve governed by the pressure of the motive fluid in the accumulating chamber for controlling the admission and exhaust of said limited supply of motive fluid to and from the pump.

37. In a pumping system, the combination of a source of supply of motive fluid, a measuring tank connected thereto, a pump chamber, a main valve between the pump chamber and the measuring tank, and a pressure controlled element for operating said main valve, said element being connected between the measuring tank and the main valve.

38. In a pumping system, the combination of a. source of motive fluid, a measuring tank connected thereto, a valve controlling said connection, a pump chamber, a main valve between the pump chamber and the measuring tank, a pressure controlled element for operating said main valve, said element being connected between the measuring tank and the main valve.

39. In combination, a main source of motive fluid, a measuring tank for measuring a charge of motive fluid for operating the pump for a single stroke, a pump having a cylinder adapted to be alternately connected to said measurin chamber for a discharge stroke and to ex aust for a filling stroke, a valve for making said connections alternately, and a pressure operated element connected between the valve and said tank for controlling said valve.

40. In combination, a pump cylinder, a main air tank, an auxiliary air tank, a connection between the tanks, a connection between the auxiliary tank and the pump, a pressure controlled element subject to pressure in the auxiliary tank, and valve means controlled by said element govering the admission and exhaust of motive fluid to and from the pump, the pump cylinder being supplied with compressed air solely from the auxiliary tank.

41. In combination, a pump, a source of motive fluid, a measuring tank, a main valve shifting the connection of the measuring tank alternately from the source to the pump, a valve operating motor and means governed by the discharge of liquid from the pump for controlling the individual strokes of the motor.

In witness whereof, I hereunto subscribe BURTON s. VHAIKMAN.