US2024479A

US2024479A - Proportioning device for fluids

Info

Publication number: US2024479A
Authority: US
Inventors: Robert J Short
Original assignee: Procter and Gamble Co
Current assignee: Procter and Gamble Co
Priority date: 1934-06-06
Filing date: 1934-06-06
Publication date: 1935-12-17
Anticipated expiration: 1952-12-17

Description

Dec. 17, 1935; Y R 4 SHORT 2,024,479

PROPORTIONING DEVICE FOR FLUIDS Filed June 6, 1934 3 Sheets-Sheet l INVENT OR.

ATTORNEYS.

Dec. 17, 1935. R H T 2,024,479

PROPORTIONING DEVICE FOR FLUIDS Filed June 6, 1934 3 Sheets-Sheet 2 f i E2 *5 r, i w.

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' INVENTOR. MO

BY .---J

ATTORNEYS.

[Patented Dec. 17, 1935 PATENT orFicEf 2,024,479." PROPORTIONING DEVICE FOR FLUIDS Robert J. Short, Cincinnati, Ohio, assignor to The Procter & Gamble Company, Cincinnati, Ohio,

a corporation of Ohio Application ti e s, 1934, Serial No. 729,217 20 Claims.- -(Cl. 131-164) This invention relates to a device for delivering two or more fluids simultaneously in definite proportions to each other, which can be varied at will. K v

The object of the invention is to provide a device of this character that will be smooth, posi-- tive and reliable in operation, adjustable to deliver different proportions as desired within reasonable limits,;and which will stop all flow automatically if for any reason any one ,fluid falls below or exceeds the predetermined proportion limits;

A further object of the invention is to provide a device of the type described which is especially applicable to liquids and whichhas a high degree of accuracy and is practically devoid of errors due to slippage as compared with other propor-- tioning devices of the rotary or piston pump depiication, Serial Number 702,266, filed December I In many industrial operations it is desirable to continuously mix two or more fluids in definite, and sometimes variable, proportions. The continuous proportioning of molten kettle soap and silicate of soda. or sal soda solution in soap mak- 8. of vcri'ide vegetable oil and caustic soda so-' lutionfor use in the continuous refining of vegetable oils,of petroleum oils and sulfuric acid; of

a liquid and a gas, or of two or more gases, are

examples of the use of this device; others might be mentioned.

Various devices have been proposedfor accomplishing this object. some give a pulsating flow instead of a smooth'continuous flow; some of the devices cannot be closely controlled or cannot be readily ad 'usted to change from one proportion to another, and none, prior to my work, as far as I am aware, will automatically and many stop the flow if the flow of one of the fluids becomes interrupted or ex'ceedsthe desired limits. These difiiculties are all overcome in my improved device. The present modification of my invention, while of general use, is especially applicablewhere the amount of secondary fluid is very small in proportion to the amount of pri-v In the following description of my invention I 7 have specifically referred to a device-applicable to theproportioning of liquids. However, it is to'be [understood that I do not wish to limit myself to liquids only,'but wish tofinclude devices of similar design applicable to the proportioning of gases and liquids or of gases only. It is to This application is related to my co-pending apinz- " the primary shafts 9 of the differential device Ill.

be considered within the scope of my invention to use rotatable 'members appropriate to the use of the proportioning device whether for liquids only, for gases and liquids, or for gases only, and by the term fluids I intend to include mobile substances of all of the various types to which I have herein referred.

My device, in its simplest form, as applied to 7 two fluids, consists essentially in the use of a suitable differential, one of whose primary shafts is caused to rotate by the flow of the primary liquid, the other of-whose primary shafts is caused to rotate by the flow of the combined primary and secondary liquids, and whose secondary member actuates a valve or other suitable con- 5 trol device controlling the flow of one ofthe liquids so that it will always flow in the desired proportion to the. primary liquid; and furthermore, an electrically operated valve or other suitable. device so arranged as to stop the flow of the primary liquid whenever the secondary liq-'- uid falls below or exceeds the desired limits. The stopping of the primary liquid will in any event automatically stop the entire device. Various modifications of this principle may be used; 5

methods of applying same are more fully .set

forth herein. The accompanying drawings will make these parts and their interrelated action clear.

Reference is made to these drawings where- Figure 1 shows a plan view of one form of device;

and

.Figure 3 shows another form of my device.

Referring to Figures 1 and 2, a pipe line, through which .the primary liquid is supplied, is indicated 40 at 5. This liquid flows through a device 6, having a rotatablemember which is caused to 'rotate inproportion to the flow of the liquid through it. This device may conveniently be a meter of known type having a counter-I to 'indicate the quantity of liquid passing through the device in a given time. The shaft. 8 of the rotatable member which is caused to extend from the casing of the meter is connected to one of ll indicates the pipe through which the primary liquid leaves the device 6 and flows through a suitable check valve l2. to pipe l3 where said primary liquid comes in contact with the secondary liquid. N indicates the pipe through Figure'2 shows an elevational view thereof,

which the secondary liquid is delivered, preferably at a slightly higher pressure than the primary liquid, through a control valve l5, through a suitable check valve I6 and through a suitable cock or valve I! to pipe I 3 which. conducts both liquids to device I8. Device It may conveniently be a. meter of the type having means 20 for adlusting the displacement volume and a connected scale I9. 2| indicates the shaft of the rotatable member of device l8, or an extension of same, which is adapted to drive, either directly or through suitable gear or chain and sprocket means, the secondary primary shaft 22 of the differential ID. A change-speed drive may also be employed, if required, to give the required speed on the shaft 22 of the differential, with reference to the speed of shaft 9, when it is desired to vary the proportion of the secondary liquid.

It is obvious that the rotation of shaft 2| will depend not' only on the quantity of liquid mixture passing through the mechanism |8 but also on its displacement volume at a given rate of flow. Thus, if the flow of liquids is maintained at a fixed rate and the displacement volume of said device is varied, the speed of shaft 2| will vary. If the change in displacement volume is accompanied by a corresponding decrease or increase in the volume of the mixture of liquids passing through said device, the speed of the shaft 2| will remain unchanged. Since the rate of flow of the primary liquid will remain constant for any given set of conditions, any change in the displacement volume of the said device must necessarily be compensated for "by a corresponding change in the volume of the secondary liquid in order that the one primary shaft may revolve in the desired relation to the other primary shaft.

The particular type of differential mechanism is not a limitation upon my invention. In my specific exemplary embodiment, the'first primary shaft 3 carries a wide faced gear 23. The second primary shaft 22 of the differential is threaded as shown, the threads extending substantially from end to end thereof inside the'housing of the differential. Mounted on said threaded shaft 22 is a gear or secondary member 24 threaded internally to match the thread on shaft 22 so that its axis is concentric with the axis of the threaded shaft 22. The teeth in gear 24 engage with the teeth of gear 23. The hub of gear 24 is grooved and fitted with a collar provided with pins 25, soar-ranged that the end of a lever 40 must move laterally with the gear 24. The lever 40 is provided with a fulcrum 21 mounted upon an external support 28. The lever 40 is connected through a suitable linkage and lever 26 to the stem 29 of a valve l5 which is located in the pipe line carrying the secondary liquid. 30 indicates dagrammatically an electrical switch or contact means arranged to be moved by the lever 40, against abutments 3| and 32, so that an electrical contact will be made when the lever moves to an extreme position either to the right or to the left. The closing of these contacts can be made, by known means, to operate means for stopping the flow of the liquids, and/or suitable signals. For this purpose I have shown the switch 30 connected by

leads

33 and 34, in one of which a source of current 35 is inserted, to the solenoid 36 of a magnetically operated valve 31 in the outlet line 38 of the device. I have likewise shown a signaling means 39 connected in parallel with the solenoid. It will be noted that the valve 31 is in the line 38 beyond the point of entry of the delivery line I4 for the secondary fluid. Any other known device for stopping the flow of the liquids may be used.

It will be clear from the foregoing that one means of adjusting the'proportion of primary to secondary liquids is by varying the volume of displacement of the device I8. This method of adjustment, while it may throw the readings of the meter I8 off, has the advantage, within the limits of such displacement volume adjustment, of requiring no adjustment of the differential mechanism, nor the use of change speed devices.

In order to secure variations of proportions not within the limits of displacement adjustment of the secondary rotatable device I8, a sprocket wheel, not shown, mounted on shaft 2| may be connected by a suitable chain to a sprocket wheel which may be attached to the second primary shaft 22 of the differential. The relative sizes of the sprocket wheels may be selected to give the desired speed on shaft 22 of the differential with reference to the speed of shaft 9 when the two liquids are flowing in the predetermined proportion. Variable speed transmissions of any well known type or suitable gears may be used at these points.

The principle of operation of the device of Figure 1 is as follows, assuming two liquids are to be mixed:

The flow of the primary liquid causes the rotating member or meter 6 to rotate in direct relation to the amount of liquid flowing, and through suitable connections causes primary shaft 9 of the differential to operate at a certain speed.

The primary liquid then flows through pipe H,

flowing through said mechanism in the predetermined proportion. The construction of the differential shown is such that if these two primary shafts rotate at the required speed relation, the member-24 on the threaded shaft will maintain its position without lateral movement along the shaft 22; but if the primary shafts fail to rotate at the required speed relation, which can be caused only by a variation of the liquids from the predetermined proportion, then the member 24 will move in a lateral direction to the right or to the left along the threaded shaft, the direction depending on which shaft is moving faster. The lever attached to this secondary member 24 is thereby caused to move in the same direction as the member 24 and in combination with a suitable fulcrum will thus operate the stem of the balanced control valve to open or close same as required, thus increasing or decreasing the flow of the secondary liquid through the rotatable member |8' until the desired proportional rate of flow is again restored, whereupon the two primary shafts of the differential will again rotate at the proper speed relation, keeping the member 24 in a position of equilibrium. By suitably adjusting the length or position of the lever arms, a proper setting is obtainable so that the gear 24, in its lateral movement, disengages with the gear 23 at the maximum and minimum openings respectively of the valve l5. Thus any desired proportions within the limit of the valve are obtainable.- The two liquids after passing through the apparatus may then discharge into a mixing deline carrying the mixed liquids will reduce the total flow without permitting the proportions of the two liquids to vary. If the flow of the secondary liquid'is changed to an amount greater than can be compensated for by the operation of the differential and its control valve, the electrical device will then so operate as to stop the how of both liquids until the cause of" the trouble can be corrected.

It is, of course, possible so .to design this type of differential that the two primary shafts, in-

stead of rotating at identical speeds, will rotate at different speeds while fmaintaining the secondary member 24in its proper laterally stationary position of equilibrium. This could be the case, for example, if the gear 23 were made with a different diameter and different number of teeth from the secondary gear 24. Such a variation, however, would be considered equivalent to the differential as described for all intents and purposes. It is also obvious that any other type of differential can be used instead of the one described, provided only that it has two driven primary and secondary members co-acting on a controlling member in such a way that the motion of the latter whether rotary or lateral, can

be used to control the secondary liquid. Hence my invention is not limited to the use of the type of differential shown, but covers the use of any differential in substantially the manner described in connection with a suitable means of control. If the rotatable members 6 and I8 have any difliculty in. driving the shafts of the differential without permitting slippage or leakage of liquid through same, torque amplifiers of known type may be installed to supply the power needed to drive the differential shafts; but this is not ordinarily necessary.

It is-also to be understood that means of power transmission other than .a lever -or levers, as

shown and described, may be used between the control member of the differential and. the stem of the control valve or other controlled means. A rotary screw motion or a worm and gear type of transmission may be used, or any other of the many known mechanical means for accomplishing this object. My invention is not limited to the use of the lever, therefore, but is-intended to cover any means of transmitting motion from the control member of the differential to the stem of the controlled valve or-to the pump or to other controlled means in such a way as to affect the flow of the liquid.

The relativeproportions of the two liquids can readily be changed, as hereinabove indicated, within limits of the apparatusby changing the displacement of the adjustable rotatable member I 8. When necessary to make changes outside the limits of the displacement of device IS, the substitution of suitable sized gears or sprockets in the system will accomplish the result within any desired-range. .The relative sizes of rotatable members, or meters, pipe lines, and valves, will handled, so as to obtain suitable speeds of rotation of the shafts within the desired range for use in this device.

Three or more liquids may be mixed or de livered proportionally in the same way that two are mixed as shown in Figure 1 by adding another difierential, another balanced controlvalve, and rotating device of adjustable displacement for each additional liquid, and by so arranging the apparatus that the primary liquid flows 10 through the primary rotatable member then becomes mixed with the secondary liquid; the mixture of primary and secondary liquids flows through the secondary rotatable member then becomes mixed with a tertiary liquid; the mix- 15 ture of primary, secondary, and tertiary liquids flows through the tertiary rotatable member, becomes mixed with the quaternary liquid and so on; and by arranging the apparatus so that the primary rotatable member operates the first 0 primary shaft of the first differential, the secondary rotatable member operates the second primary shaft of the first differential and also the first primary shaft of the second differential, the tertiary rotatable member operates the sec- 5 ond primary shaft of the-second differential and also the first primary shaft of the third diflerential and so on, while the control member of each. added differential controls a balanced valve in the pipe line supplying the corresponding addi- 39 tional liquid.-

Figure 3 shows a somewhat different arrangement adaptable to the proportioning of three or more liquids, five liquid delivery lines being shown. ll represents a gear-driven by the primary rotatable member Ill. Rotatablemembers 10', 10", 10"", operate respectively threaded shafts I2, 12", 12"", 12"", on which are mounted internally threaded gears or secondary members I3, 13", 13", 13"". The teeth of the 40 gear 'll mesh with the .two broad faced gears 1 84 and 85. The teeth in the secondary members 13', 13" and 13", 13" mesh with the broad

faced gears

84 and 85 respectively. The secondary members are attached to levers, 14', 14", 14", 14"" respectively operating control valves 15', 15", 15", 15" in the pipe lines carrying the respective controlled liquids. Another vari-, ation of the above differential may be obtained by substituting a broad faced gear for gear II and by having-secondary gears 13', 13'', 13?", 13"" mesh directly therewith." The proper direction of rotation may be obtained with the use of suitable gears in connection with the respective shafts of the rotatable members.

bear switches 16', 16", 16", 15"", connected in parallel to leads I! and I8, which in turn are connected to the solenoid 19 of a cut-off valve 80 in the delivery line 8|. There will be a suitable source of current at 82 for actuating the solenoid 19, and/or a signalling device 83 connected into the circuit. Anyother known device for stopping the flow of liquids may be used.

' It is obvious that when the proportions of the two or more liquids are permanently fixed, the use of an adjustable displacement rotatable device is unnecessary and in that case the secondary rotatable member can havev afixed displacement such that the passage of the correctly proportioned mixture of liquids through said secondary rotatable member will cause the one The operation of these arrangements is substantially the same as primary shaft to revolve in the correct relation to the other primary shaft of the corresponding diflerential.

In order to prevent the continued flow of the primary liquid when the flow of the secondary liquid is interrupted for any reason, or when the required proportions cannot be maintained, a suitable electrical switch is provided. This may most conveniently be placed on the lever operating the balanced control valve, so as to operate as follows: If the flow of the secondary liquid stops or if its relative rate exceeds or falls below a desired point, the secondary member 2| of the diflerential will then automatically travel in a lateral direction along the shaft 22 far enough to operate the electric switch, which will then operate a suitable electrically controlled valve stopping the flow of the primary liquid, or the flow of both liquids; or it may be arranged to cut oil the current supplying the motors which operate the pumps supplying the fluids. Either method, therefore, stops the apparatus entirely and it will not resume operation until the trouble is corrected.

This apparatus is easily constructed at moderate cost, is simple and positive in its action, gives a smooth flow of both liquids without pulsations, can be readily adjusted to any desired proportions of two or more liquids, and will not permit any flow if the desired proportions for any reason cannot be maintained.

Liquids of practically any kind or degree of viscosity can be handled satisfactorily in this device. Even liquids containing suspended matter forming a so-called sludge will operate satisfactorily, provided the said materials will'flow like liquids.

of a primary fluid, comprising in combination a primary rotatable member in the line of flow of the primary fluid adapted to rotate in definite relation to the amount of fluid flowing, a secondary rotatable member in the line of flow of the mixture of the primary and secondary fluids, adapted to rotate in deflnite relation to the amount of combined fluids flowing, a control valve in the line of flow of the fluid to be controlled, a suitable diflerentiaL and power transmitting means between the different elements; so arranged that each of the said rotatable members causes one of the primary shafts of the diflerential to rotate, said primary shafts being caused to rotate at such a ratio of speed to each other as will hold the secondary member in a stationary position when the two fluids are flowing in the desired proportions but will cause movement in the secondary member of said differential when the said ratio is disturbed; said movement in the secondary member of the differential being of such nature as to actuate the said control valve so as to permit the fluid under control to flow again in the desired proportion.

2. A device for controlling the flow of a secondary fluid in any desired proportion to a primary fluid, comprising in combination a primary rotatable member in the line of flow of the primary fluid adapted to rotate in deflnite relation to the amount of fluid flowing, a secondary 5 rotatable member of adjustable displacement volume in the line of flow of the predetermined mixture of the primary and secondary fluids. adapted to rotate in deflnite proportion to the amount of combined fluids flowing, a control valve in the line of flow of the fluid to be controlled, a suitable differential, and power transmitting means between the different elements; so arranged that each of the said rotatable members causes one of the primary shafts of the differential to rotate, said primary shafts being caused to rotate at such a ratio of speed to each other as will hold the secondary member in a stationary position when the two fluids are flowing in the desired proportions but will cause movement in the secondary member of said difl'erential when the said ratio is disturbed; said movement in the secondary member of the differential being of such nature as to actuate the said control valve so as to permit the fluid under control again toflow in the desired proportion; the desired proportion being adjustable by means of the adjustable secondary rotatable member.

3. A device for controlling the flow of fluids in deflnite proportions to the flow of a primary fluid, comprising in combination a primary rotatable member in the line of flow of the primary fluid adapted to rotate in definite relation to the amount of fluid flowing, succeeding rotatable :3 members, one for each fluid being controlled, adapted to rotate in direct relation to the amount of combined fluid flowing, so arranged that, in succession, the controlling fluid is mixed with a controlled fluid then flows through the rotatable member corresponding to that controlled fluid.

a control valve in the line of each controlled fluid. suitable diflferentials, equal in number to the number of fluids to be controlled, and power transmitting means between the different elements; so arranged that the primary shafts of each diflerential are caused to rotate by the rotatable members associated with the proportioning of the fluid controlled thereby, said primary shafts in each differential being caused to rotate at such a ratio of speed to each other as will hold the secondary member of the differential in stationary position when its respective fluid is flowing in the desired proportion to the primary fluid, but will cause movement in the secondary member of the diii'erential when the said ratio is disturbed; said movement in the secondary member of the diflerential being of such nature as to actuate the corresponding control valve so as to permit the fluid under its control to again flow in the desired proportion to the primary fluid.

4. A device for controlling the flow of fluids in deflnite proportion to the flow of a primary fluid and for stopping the flow of the fluids when the flow of a controlled fluid falls below or exceeds predetermined limits, comprising the device as described in claim 2 combined with a device comprising electrical switches equal in number to the number of controlled fluids actuated by the movement of the secondary member of the differential and an electrically operated valve on a line carrying the mixture of proportioned fluids; so arranged that when the flow of a controlled fluid falls below or exceeds predetermined limits, the movement of the secondary member of the difl6 flow of a controlled'fluid falls below or exceeds predetermined limits, comprising the device as described in claim 3 combined with a device comprising electrical switches equal in number to the number oi! controlled fluids, actuated by the movement of the secondary member of the differential and an electrically operated valve on a line carrying the mixture of proportioned fluids: so arranged that when the flow of a controlled fluid falls below or exceeds predetermined limits, the

movement of the secondary member of the diflfer ential corresponding to that fluid will actuate the electrical switch causing an electric current to actuate a suitable device to stop the flow oi the fluids.

6. A device for controlling the flow of fluids in definite proportions to the flow of a primary fluid,

comprising in combination, a primary rotatable member in the line of flow of the primary fluid adapted to rotatein definite relation to the amount of fluid flowing, succeeding rotatable members of adjustable displacement volume, one for each fluid being controlled, adapted to rotate in direct relation to the amount of combined fluid flowing, so arranged that, in succession, the controlling fluid is mixed with a controlled fluid, then flows through the rotatable member corresponding to that controlled fluid, a control valve in the line of each controlled fluid, suitable differentials, equal in number to the number of fluids to be controlled, and power transmitting means between the different elements; so arranged that the primary shafts of each difierential'are caused to rotate by the rotatable members associated with the proportioning of the fluid controlled thereby, said primary shafts in each difierential being caused to rotate at such ratio of speeds to each other as will hold the secondary member of the differential in a stationary position when the respective fluid is flowing in the desired proportion to the prl-' mary fluid but will cause movement in the secondary member of. said differential when said ratiois disturbed; said movement of the secondary member of the differential being or such nature as to actuate the corresponding control valve so as to permit the fluid under its control to again flow in the desired proportion to the primary fluid, the desired proportions being adjustable by means of the adjustable rotatable members. p

' '7. In a device for controlling the flow of a plurality of fluids in any desired proportion, means moved by the passage of a controlling fluid in accordance with its rate of flow, means moved by the flow of the mixture of controlling and controlled fluids in accordance with its rate of flow,

means for controlling the rate of flow of said controlled fluids and motion transmitting means connecting said aforementioned means, said motion transmitting means being of a type to arrive at an equilibrium when the motion of said first two mentioned means is in the required proportion but to produce motion of said third mentioned means when said equilibrium is disturbed.

8. In a device for proportioning the flow of fluids, means for delivering a controlling fluid, motive means actuated by the flow of said fluid in said delivery means in proportion to said flow.

means for delivering a controlled fluid, motive means actuated by the flow of a mixture of the said controlling and controlled fluids in said delivery in proportion to said flow, an equilibrium 1 motion device having a plurality of primary driven parts and a secondary part adapted for r means actuated by the flow of a mixture of the said controlling and controlled fluids in said delivery in proportion to said flow, an equilibrium motion device having a plurality oi! primary 20 driven parts and a secondary part adapted for movement upon the disturbance of a given relationship of motion of the primary driven parts, individual motion transmitting connections between said motive meansand said primary parts, 25'

a valve in the delivery means of said controlled fluid, a connection between said valve and said secondary part, valve means in said delivery means and means actuated by said secondary I part for closing said valve means when said 'sec- 30 ondary part exceeds a given range of movement. 10. In a device for proportioning thev flow oi fluids, means for delivering a controlling fluid, motive means actuated by the flow of said fluid in said delivery means in proportion to said flow, 35 means for delivering a mixture of the controlling and controlled fluids, adjustable motive means actuated by the flow of said mixture of controlling and controlled fluids in said delivery in pro-;

portion to said flow, an equilibrium motion device 40 transmitting connections between said motive 45.

means and said primary parts, a valve in the'de livery means of said controlled fluid and a con-' nection between said valve and said secondary part. 7

11. A device for controlling the flow of a plurality of fluids in definite proportion to a'primary fluid, comprising in combination, a primary'rotatablemember in the line of flow or the primary fluid adapted to rotate in definite relation to the amount of fluid flowing, succeeding rotatable members, one for each fluid being controlled, adapted to rotate in direct relation to the amount of combined fluid flowing, so arranged that, in succession, the controlling fluid is mixed with a controlled fluid, then flows through a rotatable member corresponding to that controlled fluid, a control valve in the line of each controlledfluid,

a suitablediiferential device having aplurality of primary driven parts, and a secondary part adapted'for movement upon the disturbance V a given relationship of motion of the primary parts, and power transmitting means between the different elements so arranged that a common;

a primary shaft is caused to rotate by the primary rotatable member, and that each of a plurality'ot other primary shafts, equal in number to the number of controlled fluids, is caused to rotate by oneof the additional rotatable members-the primary shafts being caused to rotate at such'a ratio of speed to each other as will hold the secondary 5 members in a stationary position when their re-. spective fluids are flowing in the desired proportion, but will cause movement in secondary members when the proportion of the corresponding controlled fluids to the controlling fluid is disturbed; said movement in the secondary member being of such nature as to actuate the respective control valve so as to permit the respective fluid to again flow in the desired proportion to the other fluids.

12. A process of proportioning fluids which comprises causing a primary fluid to flow through a conduit and to actuate moving means in accordance with its flow, adding thereafter to said primary fluid a secondary fluid, causing the combined fluids to actuate moving means in accordance with their combined flow, and causing said several moving means to interact upon a controlling means aflecting the flow of said secondary fluid;

13 A process of proportioning fluids which comprises causing a primary fluid to flow through a conduit and to actuate moving means in accordance with its flow, adding thereafter to said primary fluid a secondary fluid, causing the combined fluids to actuate moving means in accord ance with their combined flow, and causing said several moving means to interact upon a controlling means afiecting the flow of said secondary fluid, providing cut-ofi means in the' line of flow of said combined fluids and causing said controlling means at a predetermined position to actuate said cut-ofi means.

14. A process of proportioning fluids which comprises causing a primary fluid to flow through a conduit and to actuate moving means in accordance with its flow, adding thereafter to said primary fluid a secondary fluid, causing the combined fluids to actuate moving means in accordance with their combined flow, and causing said several moving means to interact upon a controlling means afiecting the flow of said secondary fluid, and producing controlled variations in the flow of said fluids by producing changes in the displacement volume of said last mentioned moving means.

15. In a proportioned flow device, a conduit for a primary fluid, means in said conduit acting in accordance with the displacement volume to move a member in accordance with the rate of flow of said primary fluid, a conduit for a secondary fluid, said conduit joining said first conduit at a point beyond said displacement volume means, a second displacement volume means in said conduit beyond said juncture, and adapted to move a member in accordance with the rate of flow of said combined fluids and an interconnection between said moving members and a controlling member, and means whereby said controlling member may produce a variation in volume of said secondary fluid.

16. In a proportioned flow device, a conduit fora primary fluid, means in said conduit acting in accordance with the displacement volume to move a member in accordance with the rate of flow of said primary fluid, a conduit for a secondary fluid, said conduit joining said first conduit at a point beyond said displacement volume means, a second displacement volume means in said conduit beyond said juncture, and adapted to move a member in accordance with the rate of flow of said combined fluids and an interconnection between said moving members and a controlling member, and means whereby said controlling member may produce a variation in volume of said secondary fluid, cut-oil means in said conduit beyond said juncture and means whereby said controlling member may actuate said cut-ofi means.

17. In a proportioned flow device, a conduit for a primary fluid, means in said conduit acting in accordance with the displacement volume to move a member in accordance with the rate of flow of said primary fluid, a conduit for a secondary liquid, said conduit joining said first conduit at a point beyond said displacement volume means, a second displacement volume means in said conduit beyond said juncture, and adapted to move a member in accordance with the rate of flow of said combined fluids and an interconnection between said moving members and a controlling member, and means whereby said controlling member may produce a variation in volume of said secondary fluid, the volume displacement of said second volume displacement means being adjustable to vary the proportion of said fluids without adjustment of said interconnection.

18. In a proportioned flow device a conduit for a primary liquid, means in said conduit acting in accordance with the displacement volume to move a member in accordance with the rate of flow of said primary liquid, a conduit for a secondary liquid, said conduit joining said flrst conduit at a point beyond said displacement volume means, a second displacement volume means in said conduit beyond said juncture and adapted to move a member in accordance with the rate of flow of said combined liquids, and an interconnection betweensaid moving members and a controlling member, and means whereby said controlling member may produce a variation in volume of said secondary liquid.

19. In a proportioned flow device a conduit for a liquid, means in said conduit acting in accordance with the displacement volume to move a member in accordance with the rate of flow of said liquid, a conduit for a gas, said conduit joining said first conduit at a point beyond said displacement volume means, a second displacement volume means in said conduit beyond said juncture and adapted to move a member in accordance with the rate of flow of the combined liquid and gas, and an interconnection between said moving members and a controlling member and means whereby said controlling member may produce a variation in volume of said gas.

20. In a proportioned flow device a conduit for a primary gas, means in said conduit acting in accordance with the displacement volume to move a member in accordance with the rate 0! flow of said primary gas, a conduit for a secondary gas, said conduit joining said first conduit at a point beyond said displacement volume means, a second displacement volume means. in said conduit beyond said juncture and adapted to move a member in accordance with the rate of flow of said combined gases, and an interconnection between said moving members and a control member, and means whereby said controlling member may produce a variation in volume of said secondary gas.

ROBERT J. SHORT.