US1529693A - Pumping system - Google Patents

Description

March 17, 1925-. 1,529,693

c. w. DENNIS PUMPINGv SYSTEM Filed May 5, 1922 2 Sheets-Sheet l 271W fm March 17; 1925- 1,529,693

c. w. DENNIS PUMP'ING SYSTEM Filed May SQ 1922 2 sheets-sheet, 2

Patented Mar. 17, 1925.

UNITED STATES CHARLES W. DENNIS, OF CHICAGO, ILLINOIS.

i w PUMPING SYSTEM.

Application filed May 3, 1922.

T all whom it may concern.'

-Be it known that I, CHARLES iV. Dennis. a citizen of the United States, and resident of Chicago,in the county of Cook and Stat ot' Illinoisha-ve invented ay 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.

My invention relates to improvements in pumping systems, and is particularly concerned with, though not limited to, improvements in pumping systems ot' the hydraulicpneumatic type,-that is, a system in which air under pressure is used for forcing the water from a pressure tank to the point or points of consumption.

Briey speakino', the main object oit` my invention is to provide afpumping system comprising a pressure tank, air and Water pumps for respectively supplying air and water under pressure to the pressure tank, and an internal combustion engine for driving the air and Water pumps, means being provided for automatically starting and stopping the internal combustion engine to maintain the pressure in the pressure tank substantially constant, or, at least, to maintain it between predetermined high and low values.

.Another object of my invention is to provide a pumping system ot' the character described, although not limited to one in -ivhich the pressure oit' the air is used for delivering the .vater to the point of consumption, in which the means for starting the internal combustion engine or motor is controlled by the pressure oli' the fluid, or fluids, in the pressure tank and actuated by Huid Hoiving from the pressure tank.

ii still further object ot' my invention is toV provide an automatic pumping system, comprising an internal combustion engine and means for automatically starting and stopping it, which is vsimple inA construetion,l efficientto operate, rugged and reliable.

Other objects will appear as this description progresses, reference being had tothe accompanying drawings, in Which- 'Figure 1 is a side elevation of a pumping system embodying my invention:

lTignreV 2 is an end elevation thereof;

.Figure 3 is a central longitudinal section through the valve forming a portion ol my improved system, A

Serial No. 5581172.

Figure 4 is a transverse section line 4 4 of Figure 3; and

Figure 5 is a more or less diagrammatic and conventional illustration of the ignition circuit forming u part ot my system.

Throughout the several views, similar rei"- erence characters will be used :t'or referring to similar parts.

In general, the. embodiment of my improved pumping system illustrated herein ccmprises a pressure tank 1() to ivhi ch Water is supplied by the Water pump 11 through the discharge conduit comprising the portions 12 and 12. Air under pressure is supplied to the pressure tank by the air pump 13 through the discharge conduit 14.

The internal combustion engine 15 is provided with a belt pulley 15 which is automatically clutched to the sha-ttorc the internal combustion engine by a speed controlled friction clutch device of Well-known construction, the Weights 15a of this device being pivotally mounted upon a spider 15b secured to the shaft 15C. Il`he Weights and the springs controlling them are so adjusted that the engine shaft would be clutched to the. belt pulley when the engine reaches a predetermined speed. The belt pulley 15 is connected with the air pump and Water pump by Well-known driving connections which need not be described in detail.

Then the pumps 11 and 13 are operated by the engine 15, they respectively deliver Water taken on and air under pressure to the tank 10. The air 'Y collects at the top ot' the tank and by its expansion forces Water out ot the tank 1G through one or more discharge pipes 1G when the valve 17, or any other suitable valve, is open.

It is desirable to maintain the pressure in the tank 10 consta-nt, or, at least, to keep it between predetermined high and low values. This means that some means must be provided for automatically starting the internal combustion engine and its associated pumps when the pressure in the tank l() falls to a predetermined low pressure, and other means for automatically stopping the operation of these elements When the pres sure reaches a predetermined high value. For this purpose I proif'ide a Water motor 18 which is mounted upon suitable supporting brackets 19, this motor being illustrated as being of the rotary type, and, therefore, comprising the rotary shait Q0 which is connected with the shaft 2l' of the internal combustion engine by means of a clutch mechanism vwhich automatically disengages Vthe motor from the internal combustion engine shaft when the speed Aof the latter exceeds the speed of the shaft 20. The mechanism illustrated herewith is commonly known as the Eendirior inertia gear shift and. comprises a shaft 22 which is connected with the shaft 20 by a universal coupling 28 andI which has a spiral thread 24 ot' rather steep pitch cut on its surface. A sleeve 25 is threaded upon the shaft 22 and provided with teeth 26 for engaging the teeth 27 of the clutch member 28 which is secured to the shaft 2l oit the internal combustion engine. Preferably an eccentric weight 29 is secured to the sleeve 25.

Assuming that the internalV combustion engine is not operating and that the water motor 1S has started, the shaft 22 will begin to rotate, but the inertia of the` weightv 29 will prevent the sleeve 25 from rotating and it will be moved toward the clutch member 28 by the action or" the threads 24k until its teethv 2G engage the teeth 27 of the clutch member 28, thereby establishing a driving connection between the water motor and the shaft of the internal co-mbustion engine. Continued rotation of the water motor will cause the internal combustion engine to start, and the speed of the latter will increase 'until the speed of the shaft 21eXceeds the speed ot lthe sha-ft 22, thereby causing the sleeve 25 to move outwardly along the shaft 22 until its teeth 26 disengag'e the teeth 27 of the clutch `member 28. Thereafter the engine will continue to rotate until it is stopped in the manner about to be described.

l-shal'l now describe the means by which l automatically control the operation of the "er motor 18 to start the internal com- Vation engine. lnterposed between the sections 12 and l2 of the discharge conduit ot the water pump 13v is a control valve 30 which comprises an elongated body member having i cylindrical bore 3l formed in one end and the valve chamber 32 formed in the opposite end. This chamber is substantially co-axial with the cylinder 3l and the outer ogen end thereoiu is beveled, as shown at 33, to provide a valve seat. A. bore Aof reduced diameter 1Iforms a continuation of the cylinder 3l and is provided with an inlet port 85 with which the section l2 ot the discharge conduit otl the water motor communicates. A

Adjacent its inner end, the walls oi'v the cylinder 3l are provided with an outlet port 36 which extends a considerable distance around the cylinder, as shown in Figure l. The outlet port 36 communicates with an annular space 237 formed by the walls of the vbores 3l and 34, the valve chamber 32 and an outer wall 38 which extends part way around the body member in spaced rela-tion to the walls just mentioned. The space 3? in turn communicates with the portion l2 or' the discharge conduit of the water pump.

Slida-bly mounted in the cylinder 3l is a piston 39. rlhevalve l() which seats upon the valve seat 33 is connected by the piston rod 4l, which reciprocates in the bearing 4-2 separating the valve chamber 82 and the pump 84, with the sleeve 43 having the anH nular shoulder all. A compression spring 15, conlined between the endr the piston 39 and the annular shoulder' Ale, yieldingly holds the piston in spaced relation to the sleeve 43. rlhe'piston rodv ll is provided with a shoulder which acts as a limiting vstop to limit the movement of the piston 3) away trom the sleeve 4:3. l second compression spring l? is conlined between the annular shoulder lll and a 'follower 4S, the position ot which can be adjusted by the set screw i9 which is threaded through the kend plate 50 ot' the cylinder 3l. This plate is held in position b v means ot screws 5l., or in any other suitable manner. t

It will be noted trom an inspection ot Figure 3 that the port 52 in the wall ot' the `valve chamber 32, the space 3? and the port 36 pro-vide means Jfor establishing communiation between the cylinder 31 and the valve chamber 32, so that the inner surface ot the valve Ll() is subjected to the. same pressure (neg-glecting static head which is so small as to be negligible) as that imposed upon the end ot the piston 39. ly making the effective area ot the end oic the piston 39 larger than the corresponding area ot' the valve 40, there will be an etliective diftferential pressure tending to move the piston 39 upwardly. The value ot this pressure will, ot course. depend upon the pressure of the fluid in the cylinder 3l and the chamber 32, and also upon 'the difference in effective areas of the piston and the valve. In any event the excess pressure exerted upon the piston will tend to move this piston upwardly, thus compressing the springs Ll5 and 47 and tending' to hold the valve l0 in its closed position. The two springs l5 and 47 can be proportioned that when the pressure in thecylinder 3l and the chamber 32 t'alls to a certain predetermined value, the tension of the su Ll5 and di' will be greater than the d ential pressure tendingto hold the piston 39 in its raised position, and it will be lorced downwardly by the springs to the lower end of the cylinder 3l. Movement oi the piston 39 to the lower end ol the cylinder 3l is permitted by displacement or' the water from the lower end oli the cylinder 3l through the port 34 which establishes communication between the bore 3st and the space 37. This movement will open the valve l0 at the same time that theL piston 39 moves downwardly and closes the port LCI fil

and closed.

1,52 new Tater will thereupon be discharged from the tank l0 through the portion f" of the discharge conduit of the pump the space 3T, the port valve seat chamber 53 into the pipe 5d which conveys the water to the water motor i8 and sets itin motion.

As soon as t ie water pump begins to opcrate, the water will be forced through l portion l2 of its dischar conduit into the fiil'ifier 3l, thereby causing the piston 39 t; closing the valve fm CV- ment of the piston 3f lthe valve d@ cuts off the supply of water to the motor i8 and causes it to cease functioning.

lt will be noted that the piston rod il is provided with bore el for venti up 3er end of the cylinder 3l into the cham* bei' 53 and for equalizing the pressures upon the opposite ends of the pison rod 4:1. This latter function is of some value when the valve Ll0 is open., because at this time there is some back pressure in the chamber 53 and pipe which tends to c e the valve #la While various means may be used for causing the internal combustion engine to quit operating when the pressure in the tant: l() rises to a `predetermined value` l prefer to use means substantially like that illustrated in Figure 5 wherein l have shown a conventional type of ignition system for the internal combustion engine comprising a battery one terminal of which is grounded, as indicated at 6l, and the other terminal of which is connected with the binding' post 62 of a switch 63, the controlling mechanism of which is located in the housing The switch G3 comprises the two contacts and 66 which can be opened 'lhe contact 66 is connected by tie conductor 67 with one terminal' of the primary of the induction coil 68. The other terminal of this primary is grounded by the conductor 69. One terminal of the secondary of the i duction coil 68 is grounded by the conductor '70 and tie other terminal is connected by the conductor 'T1 with a suitable ignition device 72 which may be in the form of a. spark plug, or any other similar or equivalent device, one terminal of which is grounded by the conductor 73.

A pipe Zet establishes communication between the housing 6d in which the control mechanism is located and the pipe lll leading from the air pump to the tank, so that the control mechanism in the housing 64 is con trolled by the pressure in the tank. The pressure control and actuated switch described abo-ye may be of any well-known construction and detailed description there is, for that reason, unnecessary. It is sufficient that it provides means for automatically opening the contacts 65 and 66 when the pressure in the tank l0 reaches a predetermined high Value and closing these contactsy when the pressure drops to ,a predetermined lou' value. Preferably the contacts 65 and o6 lclose at a slightly greater pressure than that at which the Valve d() is o en, so that, when the valve et() opens, the the engine is completed, the engine to be started enabling once. The operation of my improved pumping system is follows:

As the pressure in the tank l0 drops. it will reach apredetei 'lined value at which the switch will he automatically closed. thereby placing the ignition system of the internal combustion engine in condition for operation. As the pressure continues to decrease, a point will be reached where the springs 4:5 and i7 will exceed a differential pressure acting upon the piston 39 and bias the valve i0 to its open position, thereby permitting water under pressure to flow from the tank l0 to the motor 18. is soon as the rotary member of this motor begins to rotate, the two clutch members 25 and 28 will be locked together, whereupon the shaft of the internal combustion engine will be rotated by the motor, thus causing the inten nal combustion engine to start. As the speed of the intern-ai combustion engine increases, it will soon exceed the speed of the motor 1S, whereupon the driving connectionbetween the motor and the engine will be interrupted, as described above. The speed controlled friction clutch between the engine shaft and the belt pulley of the engine can be designed to connect the shaft and the belt pulley either before or after, but preferablyv after, the connection between the motor 18 and the internal combustion engine has been broken.

As soon as the connection between the driving shaft of the engine and its belt pulparatus and thus stopping the engine. By

constructing the *salve mechanism interposed between the water pump and the pressure tank so that the flow of water from the pump closes the Valve 30, I prevent the escape of any considerable amount of water from the tank 10 after the water pump has once been started.

While l have described the details of construction of" the preferred embodiment of my invention, it is to be clearly` understood that my invent-ion is not llimited to these details, but is capable of other adaptations-and modifications within the scope of' lthe-appended claims.

Having vthus described my i invention, what I claim is:

l. The combination with a pressure tank, an air pump and a water pump for -respectively supplying air and water tosaid tank, of aninterna-l combustion engine for driving said pumps, an ignition circuit for said engine having a switch controlled by the p-ressure in said tank, a water Vmotor having a re leasable connection with said internal combustion engine, and ymeans .forsupplying water to said water motor, co-mprisinga valve inserted between said .water pump. and tank, said valve comprising a body member havinga cylinderA formed therein, saidcylinder having an inlet port `connected vwith said pump and an outlet port connected with said pressure tank, said outlet port being formed in the wall ofsaid cylinder adjacent `oneend thereof, said body member having a valve chamber pro-vided with an outlet port co-axial with said cylinder, means forestablishing `communication between said ,chamber and said cylinder, an outwardly opening valve in said chamber for opening and closing said last-named outletfport, a piston in said cylinder, the eiective area of said piston beinggreater than the effective area ofsaid valve, a rod connecting ,said ypistonand valve, a-nd a spring biasing said valve-toward its open position. V f

2.. The-combination with ai-pressure tank and a water pump for supplyingwater to said tank, of'an internal combustion engine for driving saidpump, 4an ignition circuit for said Vengine havinga switch controlled by the pressure in said tank, a water motor connectediwith said internal combustion engine, andy means tor supplyingwater tosaid water motor, comprising a valve inserted -between said water pump and tank, said valve comprising a body member havingv a cylinder formed therein, said cylinder having an inlet port connected withisaid pump and an outlet port connected with said pressure tank, said outlet port being' formed in the wall of said cylinder adjacent one endthereof, said body member having a valve chamber provided with 'an outlet port,means for establishing communica-tion between said chamber and said cylinder, an -outwardly opening valve in said chamber for opening and closing said last-named outlet port,y a piston in said cylinder, the effective area of saidpiston being'greater than the eective 4tank for starting said engine, and means area of said'. valve, means connecting said piston and valve, and means biasing said valve toward its open position.

Y 3. :The combination with av pressure tank nase-,.693

anda pump forsupplying water thereto, -of an internal .combustion engine for driving said pump, said internal combustion engine having an ignition circuit, comprising a switch controlled `by the pressure in said tank, a lmotorahaving a i'eleasableeonnection with said internal combustion engine, and means controlled by `the pressure in said tank for. establishing communicationA between said tank and motor when the pressure in said tank Ireachesa predetermined low value, and means directly actuated by the flow of water from said pump to v.said tank for'destroying said communication.

4. The combinations-with ay pressure tank and a pump for supplyingwater thereto, of an internal .combustion engine for-driving said pump, a motor having a releasable-,connection with said internal combustion. en-

gine, and means controlled by` the pressure in saidtank for establishing, communication kbetweensaid tank andinotor when the pressure in y.said tank reachesa predetermined .low valuepand means directly actuated by the flow of water from said pump `to said tank. for destroying said. communication.

Cil

5..The combination with a pressure tank l and apump for supplying waterthereto, of an internal combustion .engine for driving said pump, a motor having a releasable connection with vsaid `internal combustion engine, and means for-.establishing communication between said tank .and motor whenv gine, anda valve interposed in said water pump discharge conduit and controlled by the pressure in said tank for connecting said water motor with said tank when the `pressure in saidtank falls below a predetermined value.

7 The combination with a pressure tank, of a-pump for supplying fluid to said tank, an internal combustion engine for driving said pump, automatic means controlledl by the pressure of the fluid in said tank vforstoppng said engine, automatic means controlled by the pressure of the fluid in said directlycontrolled by the flow of fluid from lsaid pump torsaid .tankfor making said lastnamedmeansinactive.

-lUO

8. The combination with a pressure tank, of a pump for supplying fluid to said tank, an internal combustion engine for driving said pump, automatic means controlled by the pressure of the fluid in said tank for stopping said engine, and auton'latic means located between said pump and tank and controlled by the pressure of the fluid in said tank for starting said engine.

9. 'Ihe combination with a. pressui'e tank, of a pump for supplying fluid to said tank, a motor for driving said pump, automatic means controlled by the pressure of fluid in said tank for stopping said motor, automatic means controlled by the pressure of the fluid in said tank for starting said motor, and means directly controlled by the flow of fluid from said pump to said tank for making said last-named means inactive.

10. The combination with a pressure tank, of a pump for supplying fluid to said tank, an internal combustion engine for driving said pump, and automatic means directly controlled by the pressure of said tank and by the flow of fluid from said pump for automatically starting and stopping said engine, to keep the pressure in said tank between predetermined high and low values.

11. The combination with a tank, of a pump for supplying fluid to said tank, an internal combustion engine, a speed controlled clutch for connecting said engine with said pump, means controlled by the pressure of the fluid in said tank for automatically starting and stopping said pump, and means directly actuated `by the flow of fluid from said pump for rendering said starting means inoperative.

12. The combination with a tank, of a pump for supplying fluid to said tank, a motor for driving said pump, means for au* tomatically connecting said motor with said pump when the speed of said motor reaches a. predetermined value, means controlled by the pressure of fluid in said tank for automatically starting and stopping said motor, and means directly actuated by the flow of fluid from said pump for rendering said starting means inoperative.

13. The combination with a tank, of a pump for supplying fluid to said tank, an internal combustion engine for driving said pump, a fluid motor for starting said internal combustion engine, and means controlled by the pressure in said tank and directly by the flow of fluid from said pump for automatically starting and stopping said fluid motor.

14. The combination with a tank, a. pump for supplying fluid to said tank, an internal combustion engine for driving said pump, and a fluid motor for starting said internal combustion engine, of a valve located between said pump and tank for controlling the passage of Huid to said motor, and means for closing said valve immediately said pump starts pumping.

15. In combination with a fluid pressure system comprising a tank, a pump, a conduit connecting said pump with said tank, driving means for said pump, starting means for said driving means, fluid conveying means between said conduit and said starting means, a valve therein, and means for effecting a pressure differential in said conduit to close said valve.

16. In combination with a fluid pressure system comprising a tank, a pump, a conduit between said tank and pump, driving means for said pump, means for effecting a pressure differential in said conduit, starting means for said driving` means, fluid-convey ing means comprising a valve between said conduit and said starting means, means tending to open said valve, and a tube adapted to convey high pressure fluid from said conduit to said valve to close the same.

17. In combination with a fluid pressure system comprising a tank, a pump, a conduit therebetween, driving means for said pump, starting means for said driving means, fluid-conveying means between said conduit and said starting means, a valve for said conveying means, a spring tending to open said valve, and means whereby said valve is automatically closed upon actuation of said pump.

In witness whereof, I hereunto subscribe my name this 1st day of May, 1922.

CHARLES W. DENNIS. Witnesses:

EDNA V. GUsTAFsoN, EMILE J. BOURGEOIS.

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