US1611371A

US1611371A - Fluid-controlling apparatus

Info

Publication number: US1611371A
Application number: US596525A
Authority: US
Inventors: Priestman Albert
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-10-23
Filing date: 1922-10-23
Publication date: 1926-12-21
Anticipated expiration: 1943-12-21

Description

1,611,371 7 A. PRIESTMAN FLUID CONTROLLING APPARATUS Dec. 21 1926.

led Oct. 23, 1922 3 Sheets-Sheet 1 I IWQIZZLOZ} I I h ngfifn 6, 2 I

- A. PRIESTMAN FLUID CONTROJJLING APPARATUS iled Oct 23, 1922 3 Sheets-Sheet 2 Patented Dec. 21, 1926.

UNITED STATES PATENT OFFICE.

ALBERT PRIESTMAN, OF PHILADELPHIA, EENNSYLVANIA.

FLUID GONTEOLLING APPARATUS.

Application filed October 23, 1922. Serial No. 596,525.

utilization of air under pressure, which shall require a reduced volume of air as compared with similar prior systems and at the same time be highly efficient in utilizing such air.

Another object of my invention is to provide a simple, reliable system of apparatus for alternately supplying air under pressure to and exhausting it from a container, a machine or other device for storing or utilizing it.

I also desire to provide a system having the above characteristics, especially designed for automatically controlling the times during which air under pressure is admitted to or exhausted from any device capable of receiving or utilizing the same.

These objects and other advantageous ends I attain as hereinafter set forth, ref erence being had to the accompanying drawings, in which.

Fig. l is a diagrammatic elevation partly in vertical section, illustrating a system of apparatus for carrying out my invention;

Figs. 2 and 3 respectively are vertical sections illustrating the detail construction of portions of the apparatus shown in'Figi 1; and

Fig. 4 is a vertical section, to some extent diagrammatic. illustrating a modified form of my invention.

In Figs. 1 to 3 inclusive, 1 represents a tank or other source of air under pressure and 2 a device to which it is desired air shall be intermittently supplied and thereafter exhausted. For the sake of illustration this is shown as a tank having a pipe 3 through which a liquid such as sewage will be admitted and this pipe includes a check valve 4. Also connected to the tank 2 is a discharge pipe 5 through which liq-- uid is to be forced by air under pressure.

For governing the delivery of air to and its exhaust from the tank 2, Iprovide a pipe 6 leading from the air supply tank 1 through a valve, 7 to a cross fitting 8. From the latter a pipe 9 leads to the device or tank '2 and through a second branch 10 said fitting is also connected to an exhaust valve 11 opening tothe atmosphere. Through a fourth branch 12 the fitting 8 is connected to a casing 13 havinga diaphragm 14 therein which through a rod or other suitable connection 15, governs the movable element 16 of the valve 7, the rising of this'diaphragm when air under pressure is admitted below itcausing openingof the said valve,

member.

The exhaust valve 11 includes a valve element 17 preferably so positioned as to tend to open under the action of gravity and acted on by a rod 18 extendinginto a casing 19 having a diaphragm 20. Fixed to the rod is a collar or equivalent structure 21 acted on by a spring 22 tending to move said rod into a position permitting opening of the valve member 17. A third diaphragm casing 23 is also provided and has associatcd with it a pilot valve 24 including an element 25 designed to be moved to its open position by a rod 26 actuated by the diaphragm 27 in said casing. This rod has a collar 28 acted on by a spring 29 tending to move it into a position such as will allow seating of the valve element 25 through a pipe 30.

The valve 24 is connected with the air supply pipe 6, and on the other side of the valve element 25 a. second pipe 31 connects said valve with the lower part of the diaphragm casing 13 as well as with the lower part of the diaphragm casing 19, the ar- 1 rangement being such that air under pressure admitted to this pipe 31 will cause upward movement of the diaphragms of the

casings

13 and 19 and corresponding upward movement of the

rods

15 and 18.

The casing 23 below the diaphragm 27 is connected through a pipe 32 to a suitable source of fluid under pressure, such for extank 2 and includes a check valve 35 designed to prevent flow of air from the dia phragm casing23 while permitting flow to said casing from the pipe 9. The pipe 35 has also connected to it an adjustable escape valve or bleed 36 designed to permit escape of air from said pipe and from the casing 23 above the diaphragm, at a predetermined definite rate.

That portion of the casing 19 below the diaphragm is connected through a pipe 37 with the pipe 31 and includes a check valve 38 for preventing flow of air from said casing back to the pipe 31 and, between this valve and said casing, has also connected an adjustable bleeder 39. The pipe 31 likewise has connected with it a third bleeder 4C0.

WVith the above described arrangement of parts the valve 16 is closed and it it be assumed that the tank 33 is filled with liquid or has liquid delivered to it, the resulting air under pressure in the pipe 32 moves the diaphragm 27 upwardly in the casing 23 and unseats the valve member 25, allowing air under pressure to pass from the pipeG through the pipe into pipes 31 and 37 and into the casing 19 below its diaphragm 20. As a consequence said diaphragm moves upwardly against the action of the spring 22 and closes the exhaust valve element 17 of the valve 11. At the same time air will also pass from the pipe 31 into the casing 13 below the diaphragm 1d and likewise raise this, causing upward movement or the rod 15 and opening of the movable element 16 of the valve 7.

Air under pressure is now free to pass from the supply tank or other source 1 through the pipe 6 and valve 7 into the pipe 9 and tank 2, causing any liquid which may have been delivered to the latter to be discharged through the pipe 5. The delivery oi air under pressure to the pipe 9 results in flow of air through the pipe to the casing 23 above the diaphragm 27, and the pressure of this air is suiiieient to result in the downward movement 01 said diaphragm, with the result that the rod 26 is moved down and the valve element 25 of the valve 24L is permitted to close.

There is now a definite amount oi air under pressure in the pipe 31 and the bleeder 10 is so adjusted that this air will leak out at a definite rate and in a definite time will permit the diaphragm ll in the casing 13 to return to its normal position. The re sulting downward movement of the rod 15 will now permitclosure of the element 16 of the valve 7, thus cutting off the flow of air to the tank -2. The bleeder 39 is so set as to likewise permit escape of air from the lower part of the casing 19 at such a rate that after the closure of the valve 7 the spring 22 will act to move the rod 18 and diaphragm 20 downwardly far enough to per mit opening of the exhaust valve element 17. The air under pressure in the tank 2 is now permitted to exhaust to the atmosphere so that liquid may again flew into it from the pipe 3threugh the check valve 1.

When the pressure of the air in the pipe 35 and upper part of the diaphragm casing 23 has fallen to a sutliciently low point, the compressed air in the bell 34c and pipe 32 will again cause upward movement of the diaphragm 27 and unseating of the valve 25 with a repetition oi the above described cycle or operations.

in that form oi my invention shown in Fig. 4, I provide an air chamber ll or other suitable container arranged to be supplied with air under pressure at definite intervals by any suitable means. This container through a pipe 11 is connected to one end or a cylinder l2 having an annular seat 43 designed to cooperate with the suitably formed adjacent end of a piston it normally pressed toward said end by a spring mounted on the rod it connected to said piston. The latter is provided with a longitudinall extending annular port 47 opening on its cylindrical race and through a passage 48 connecting with the head of said piston adjacent the valve seat 4:3. In the walls ot the .nider are placed two ports 4:9 and 50 in such positions as to be successively placed in communication with the port 47 in the piston as the latter is moved longitudinally and in the present case upwardly, in the cylinder, and the rate of flow through these ports and 50 may be regulated at will by means of needle valves respectively indicated at 51 and 52.

The cylinder 42 has mounted on or connected to its upper end a casing 53 having a port 54: opening to the atmosphere, at second port 55 connected to the device or container to be intermittently supplied with air under pressure and a third port 56 connected to a source of supply of air under pressure. Between the ports 5 1- and is a passage 5'? designed to be closed by a valve 58 carried on the upper end of the piston rod 416 and into this passage extends the stem 59 of the valve 60 mounted to control the flow of air from the port 56 to the port This stem is of such a length that it will be engaged by the valve 53 and the valve (30 will be unseated when said valve 58 moves into said passage. The valve 60 is normally pressed toward its seat by a spring 61 and when unseated by the stem may be moved into such position as to close a port 62 connected with the air chamber ll for the purpose of supplying air thereto.

Under conditions of operation, when air under pressure is admitted to the pipe 41,

ill)

it acts upon a limited portion of the lower face of the piston t l within the valve seat 43. lVhen said pressure has increased sufficiently to overcome the force of the spring 15, the piston at is moved upward to a slight extent, thus permitting the air from the pipe 41 to act on the Whole of the lower face of said piston. As a result this latter moves upwardly in the cylinder 42, bringing the air port 47 into communication with the bleed port 49 and the continued upward movement of the piston thereafter brings the port 47 into communication with the port 50. At the same time, the valve 58 on the piston rod enters and closes the passage 57, thus cutting off the port 55 from the atmosphere and immediately thereafter striking the stem 59 and unseating the valve 60.

Air is now free to flow from the supply port 56 through the port 55 to the device to be actuated and if it be assumed that the supply of air under pressure is cut 05 from the chamber 41 and pipe 41 as by the closing of the port 62, it will be understood that by reason of the excape of the air in said pipe and chamber through the ports 47 and- 50, the piston 44 will gradually move down in its cylinder 42 under the action of the spring 45. The rate of this movement will depend upon the adjustment of the needle valve 52 and when it has progressed sufficiently far, the valve 60 will seat and cut off the flow of air to the port 55.

In the mean time air will continue to leak through the port 49 so that under the action of the spring the piston 44 will move toward the lower end of the cylinder 42 and ultimately withdraw the valve 58 from the passage 57. Thereupon the port will be placed in communication with the port 54, allowing the air still under pressure in the device connected to said port 55 to be exhausted. The continued escape of air through the port 49 will thereafter permit the piston 44 to engage the seat 43, whereupon the system will remain quiescent until air under pressure is again delivered to the chamber 41 and pipe 41.

From the above description it will be appreciated that in both forms of my invention it is possible to accurately control or regulate the time during which air under pressure is permitted to flow to a tank, machine or other apparatus capable of utilizing it. By separate and independent means it is likewise possible to accurately determine and regulate the time which shall elapse after the air supply is cut off before the machine, etc. is permitted to exhaust the air under pressure which it still contains. In both cases the apparatus required is relatively simple as well as rugged in construction and is capable of close regulation to obtain the desired results.

I claim:

1. The combination in means for providing intermittent delivery of air under pressure, of automatic mechanism comprising two devices respectively adapted to open and close the air supply and to open and close the exhaust, and means including two independent bleeds for respectively regulating the operations of the said devices.

2. The combination in means for providing intermittent delivery of air under pressure, of automatic mechanism comprising two devices respectively adapted to open and close the air supply and to open and close the exhaust, and means including two adjustable independent bleeds for respectively regulating the operations of the said devices.

3. The combination in means for providing intermittent delivery of air under pressure, of inlet and exhaust valves; and controlling means for governing said valves including independent bleeds set to cause said valves to act successively.

4. The combination in means for provid ing intermittent delivery of air under pres sure, of inlet and exhaust valves; motor devices for actuating said valves; and independent bleeds set to predetermine the times of operation of said devices.

5. The combination in means for providing intermittent delivery of air under pressure, of inlet and exhaust valves; air operated motor devices for actuating said valves respectively; and independent bleeds for governing the times of operation of said devices.

6. The combination in means for providing intermittent delivery of air under pressure, of inlet and exhaust valves; air operated motor devices for actuating said valves respectively; independent bleeds for governing the times of operation of said devices; with a pilot valve controlling said devices.

7. The combination in means for providing intermittent delivery of air under pressure of inlet and exhaust valves; air operated motor devices for actuating said valves respectively; independent bleeds for governing the times of operation of said devices; a pilot valve controlling said devices; and a bleed controlling the operation of said pilot valve.

ALBERT PRIESTMAN.