Патент USA US2409983код для вставки
Oct. 22,- 1946. ‘ 2,409,982‘ R. B.‘ LONGMATE LIQUID METERING APPARATUS Filed Dec. 13, 1943 3 Sheets-Sheet 1 Y n - INVENTOR. 2afoh B. Lonjmafe ‘BY Oct. 22, 1946. 2,409,982 ' ‘R. B. LONGMATE L'IQUID METERING APPARATUS‘ _ Filed Dec._ 13, 1943 5. Sheets-Sheet s, IN VEN TOR. k’v 0 5%,. h, M 5. . Ami-mm 2,409,982. Patented Oct. 22, 1946 UNITED‘ STATES PATENT OFFICE 2,409,982 LIQUID METERING APPARATUS’ Ralph B. Longmate, Detroit, Mich, assignor to Toledo Scale Company, Toledo, Ohio, a corpo ration of New Jersey Application December 13, 1943, Serial No. 514,006 8 Claims. (Cl. 73-113) 1 This invention relates to apparatus for meas uring the ?ow of liquids and in particular to apparatus adapted to measure the rate of flow of gasoline and lubricating oil during the testing of an internal combustion engine. One commonly accepted method of measuring the rate of fuel consumption of an internal com bustion engine is to mount a fuel tank on a 2 More speci?c objects and advantages are ap parent from the description, in which reference is had to the accompanying drawings illustrating a preferred form of the invention. Figure I is an elevation showing the general arrangement of a supply tank, a weigh tank mounted on a scale and the connecting piping and Valves suitable for use. in measuring'the fuel consumption of internal combustion engines. weighing scale, to provide means to keep the Figure II is an elevation showing a scale, tanks, tank ?lled with fuel while supplying fuel to the 10 and piping suitable for use in determining the engine from the tank on the scale, and then circulation rate and the consumption of lubricate making the ?ow rate determinations by inter ing oil during the test of an internal combustion rupting the fuel supply to the tank and measuring engine. the time interval required for the engine to with Figure 111 is a schematic diagram showing the draw a given weight of fuel from the tank. This 15 electric equipment and connections suitable for system, while quite accurate, suffers from the operating the equipment illustrated in Figures I disadvantage that the operator must know the and II. ‘ approximate rate of fuel consumption in order These speci?c drawings and the description that he may properly select a quantity of fuel to be weighed which will provide a suitable timing 20 that follows merely disclose and illustrate the invention and are not intended to impose limi interval. It has been found necessary, in order tations upon the claims. to obtain reproducible results, that the time in The equipment for measuring the rate of fuel terval must exceed one minute. It is also ordi consumption for an internal combustion engine narily inconvenient to allow the test to run for more than two or two and one-half minutes. 25 comprises a supply tank III which is equipped with a ?oat Valve (not shown) to maintain a Another disadvantage of this method is that de?nite level of fuel in the tank. The fuel ?ows from the tank I 0 through a pipe I I, an electrically the actual consumption in pounds per minute or controlled valve I2, and a pipe I3 to the engine. pounds per hour can be obtained. A similar system is ordinarily used to measure 30 Fuel also flows from the pipe I3 through a branch .pipe I4, another electrically controlled valve I5 the circulation rate and the consumption of the and a ?exible connection IE to a tank I‘! mounted lubricating oil. The equipment, in this case, the results obtained require computation before consists of a tank mounted on a weighing scale, a trap tank mounted on a frame work and on a scale IS. The tank I‘! is made airtight and is provided with a vent pipe IS the top end of located substantially directly above the tank on 35 which is higher than the level of the fuel in the tank I 0. Thus with the valves I2 and I5 open the scale, and piping to lead the oil scavenged the tank IT is ?lled with fuel which rises in the from the engine through suitable cooling coils vent pipe I9 to approximately the same level as and into the trap tank. From the trap tank the fuel in the tank I0. ' the oil flows into the tank on the scale and from The force created by the weight ofgthe tank this tank it is pumped back to the engine. The I‘! resting on a platform 20 of the scale I8 is rate of circulation of lubricating oil is determined transmitted through a lever system (not shown) by interrupting the oil flow from the trap tank within the base of the scale to a noseiron 2| to the weigh tank and measuring the time inter pivotally connected by a steelyard rod 22 to the val required for a de?nite weight of oil to flow load pivot 23 of a tare beam lever 24 which is from the weigh tank. This system also requires pivotally mounted within an enlarged section of computation to reduce the observed data to a a column 25. The tare beam lever 24 is provided usable form. ' with a power pivot 26, which transmits force It is the object of this invention to provide through a connection 21 to a pendulum lever 28 apparatus to measure the rate of ?ow of liquid by weight and. give the‘ indications directly in 50 pivoted within a substantially watchcase-shaped housing 29 surmounting the column 25. The terms of pounds per minute or pounds per hour. pendulum lever 28 is pivotally connected by It is another object of the invention to provide means of a stirrup and yoke assembly 30 to two apparatus for measuring the circulation rate and ?exible metallic ribbons 3| whose upper ends the consumption of lubricating oil during the overlie arcuate portions 32 of a pair of pendulum test of an internal combustion engine. 3 2,409,982 bodies 33. The pendulum bodies 33 are supported by means of other ?exible metallic ribbons 34 which overlie other arcuate surfaces 35 of the pendulum bodies 33. The upper ends of the sup porting ribbons 34 are anchored to the sides of ' a substantially rectangular frame 38 mounted within the housing 29. 4 above the level of an overflow 58 before the weigh tank 48 is completely drained. Thus if for some reason the valve 5! should be maintained closed the circulation of oil for the engine will not be interrupted. Another pipe 59 connects the ?ex ible connection 52 to the upper part of the trap tank 4‘! and thus acting with the ?exible con Motion of the pendulum bodies 33 when coun nection 52 serves as a vent for the weigh tank 48. terbalancing a load is transmitted through com The scale 49 is equipped with two indicators pensating bars 31 and a rack 33 to a pinion 39 10 60 and GI. The indicator 68 cooperates with a mounted on an indicator shaft 40 rotatably jour series of indicia 52 to indicate the quantity of naled in the rectangular frame 36. The indica oil in the tank 48 and with a second set of in tor shaft 48 carries an indicator 4! adapted to dicia 63 running counter to the indicia 62 and sweep over an annular chart 42 bearing in occupying approximately the lower two thirds dicia 43. of the chart space to indicate the weight decrease The connection from the pendulum bodies 33 to when making a circulation rate test. The indi the indicator 4| is so arranged that the indi cator 6! is arranged to actuate a photoswitch 64 cator 4| rotates clockwise with decrease in load when the indicator 60 passes the zero indicium on the platform 2!). The indicia 43 also extend of the series of indicia 63. ing clockwise thus indicate the weight of fuel 20 In normal operation sufficient oil is supplied removed from the scale. The scale is so balanced to ?ll the engine system and to keep the weight that with the tank Ill ?lled the indicator is be of the weigh tank 48 great enough so that the hind zero, i. e. fuel must be removed from the indicator 6!) rests beyond the series of indicia 63. tank to bring the indicator to zero. The electrical control for operating the weigh For the purpose of initiating the operation 25 ing systems shown in Figures I and II is shown of auxiliary control mechanism a second indi schematically in Figure III. This equipment . cator 44 is also mounted on the indicator shaft comprises the two photoswitches 45 and 64, a 40. The indicator 44 cooperates with a photo chronometer and a control timer, a manually switch 45 mounted through the side of the hous operable selector switch, and other miscellaneous ing 29 to give an electrical indication when the 30 elements. Brie?y, the operation of this equip indicator 4| passes the zero indicium as fuel is ment is: With a selector switch in its normal withdrawn from the scale. position, fuel from a tank H1 is allowed to ?ow A somewhat similar arrangement suitable for to the engine and also into the weigh tank l1. use in measuring both the consumption and the rate of circulation of lubricating oil for an engine Then when the selector switch is thrown to its under test is illustrated in Figure II. Lubricat tank I0 is interrupted and the engine is sup plied from the weigh tank l1. As the indicator “Fuel test” position the ?ow from the supply ing oil from the engine after passing through cool ing coils is returned through a pipe 45 to a trap 4! passes the zero indicium the photoswitch 45 tank 41 supported by a rigid frame-work (not .starts a timer which is set to run for one min shown) in a position adjacent to and slightly 40 ute. At the end of the minute the electrical higher than a weigh tank 48. The weigh tank control closes the valve l5 and opens the valve 48 is supported on a scale 49 which is similar [2 thereby stopping the withdrawal of fuel from to the scale I 8 except that the indicator is ar the tank Ill without interrupting the supply to ranged to rotate clock-wise with an increase in the engine. The amount of fuel withdrawn from load; Oil from the tank 41 flows through a pipe the scale is indicated on the chart 42 and may be ‘50, an electrically controlled valve 5!, and a interpreted as being pounds per minute since ?exible connection 52 to the weigh tank 48. From the fuel was withdrawn during one minute. If the tank 48 the oil flows through another ?exible desired, an additional series of indicia 65 hav connection :53, another electrically controlled ing values sixty times as great may be included valve 54, and a pipe 55 leading to the engine. 50 on the chart 42 to indicate pounds per hour. The pipes 55 and 55 are connected by a ‘by-pass After the reading is taken and the selector switch pipe 55 including another electrically controlled returned to its normal position the valve I5 is valve 51 which is normally closed. In normal again opened and the fuel tank 11 re?lled. operation the valves 5| and 54 are normally open The oil weighing system shown in Figure II and the oil is drained from the weigh tank 48 55 operates on the same principle except that the as required by the engine. The return oil ?ows time interval is one half minute instead of one into the tank 47 and immediately drains through minute. . the valve 5| back into the weigh tank 48. Thus The electrical control for accomplishing this the change in weight of the weigh tank 48 is a type of operation is schematically illustrated in measure of the amount of oil actually consumed Figure III. Electrical current from one lead 66 by the engine. The circulation rate measurements are made by closing the valve 5l,_ thereby interrupting the return of oil to the weigh tank 48 so that its weight decreases at the rate that the oil circu lates through the engine. The return oil, of course, collects in the tank 41. At the end of a 60 of a source of power ?ows through a disconnect switch 6?, leads 58, 69 and 10 to the ampli?er ‘ll of the photoswitch 45 and from the ampli?er ‘H returns through leads 12, 13, and 74 to the dis_ connect switch 61 and the other lead 15 of the power source. From the lead 69 current is sup~ plied through leads l5, and 11 to two synchronous motors 18 and 19 and from them returns through is also closed and the valve 5? opened to allow leads 80 and 8! to the return lead 73. Current is the oil to ?ow through the by~pass from the trap tank 4‘! to the engine. The decrease in weight 70 also supplied through the lead 69 and a lead 52 to another amplifier 83 associated with the p-ho of the weigh tank 43 during the known time toswitch 64 and returned from the ampli?er 83 interval is a measure of the rate of circulation. through a lead 84 to the return lead 13. The am The sizes of the tanks 47 and 48 are so pro pli?ers ‘H and 83 and the synchronous motors ‘l8 portioned that the oil level rises in the tank 41 75 and 19 are thus energized as long'as the discon predetermined de?nite time interval, the valve 54 2,409,982 5 nect switch 61 is closed. Current is also supplied from the lead 68 through a lead 85 to four sections of a six-section three-position selector switch 86 comprising sections 81, 88, 89, 90, 9|, and 92. When the selector switch is returned to its cen tral or “Reset” position after a previous test cur rent ?ows from the lead 85 through contacts 93 of section 89, lead 94, contacts 95 of section 9|, through a lead 96, a release coil 91 of a latch relay 6 lead I5I to the lead I05 which is connected to the valve solenoid I06. At‘the expiration of the half minute the con tacts I38 are opened and the relay MI is de energized, while the relay 98 remains in its latched position. The opening of the contacts I31 at the expiration of the one minute time interval de-energizes both the brake solenoid I22 ‘and the relay I26 because the circuit through the contacts II8 of the latch relay 98 has been pre 98, and leads 93 and I80 to the return lead 14. 10 viously opened. De-energization of the relay I26 This releases the latch relay 98 and returns all closes its contacts I52 thereby allowing current to the valves to their de-energized or normal posi ?ow from the lead I02 which is supplied through tion. section 88 of the selector switch 86 through the When it is desired to make a fuel consumption rate test the selector switch 86 is thrown to “Fuel 15 lead I50, the contact I52, a lead I53, the now closed contacts I41, a lead I54, a valve solenoid test” position. Current then flows from the lead I55 operating the valve I5, and the lead I08 to 85 through contacts IOI of selector switch section the return lead 13. The energization of the sole 88, leads I52, I03, normally closed contacts I04 noid I55 closes the valve I5 thereby preventing of the latch relay 98, a lead I05, the solenoid coil any ‘further withdrawal of fuel from the weigh 20 I06 of the valve I2, and leads I01‘and I08 to the tank I1. The de-energization of the relay I26 return lead 13. This closes the valve I2 thereby also opened its contacts I49 through which cur cutting off the flow of fuel from the supply'tank rent was ?owing to the solenoid I06 controlling I0 to the engine. As fuel is withdrawn from the the valve I2 thus allowing the valve I2 to open weigh tank I1 the indicator 44 interrupts the light to supply fuel to the engine. Because exactly from a light source £09 to a photocell I I0 included 25 one minute elapsed from the time that the indi in the photoswitch 45 which causes an associated cator stood at zero until the withdrawal of fuel relay III to close its contacts II2. Current then from the tank I1 was terminated the weight flows from the lead 65 through contacts I I3 of withdrawn is vequivalent to the rate of flow ‘in section 61 of the selector switch 86, a lead II4, 30 pounds per minute and the scale can be read the now closed contacts II2, leads H5, H6, H1, normally closed contacts I I8 ofthe latch relay 98, leads II9, I20, and HI to abrake solenoid I22 accordingly. After the operator has noted the indication, he returns the selector switch to the “Reset” posi of a control timer I23 and from the timer through tion thus completing the circuit through sections a lead I24 and the lead 8| to the return lead 13. 89 and 9| of the selector switch 86 to thev latch Current from the lead I20 which is supplied release coil 91 or the latch relay 98. The latch through the relay contacts H2 and the latch re relay thereupon opens its contact I41 thus de-en lay contacts II8 ?ows through a lead I25, the ergizing the solenoid I55 to open the valve I5 coil of the relay I26, and leads I21 and I00 to the thereby allowing the weigh tank to re?ll. return lead 14. Relay I26 then closes its con 40 The consumption of lubricating oil is deter tacts I28 to allow current to ?ow from the lead mined by observing the decrease in weight of the '68 through leads I29 and I36, the now closed con oil weigh tank 48 during the progress of an en tacts I28, and lead I3I to the lead II6 thereby gine test. This is predicated upon the ‘assump completing a shunt circuit around the contacts ‘tier; that the amount of oil in the engine and in II2. This energizes the relay I26 independently the cooling coils and pipes remains constant and of the photoswitch 45 allowing it to open its con- ‘4' that the loss of oil is reflected in the change of tacts I I2 without stopping the cycle of operations. weight of the tank on the scale. The rate of cir The energization of the brake solenoid I22 re culation of lubricating oil is determined in a leases the driven member I32 of a friction clutch manner ‘quite similar to the method just de I33 to allow the synchronous motor 19 to drive scribed in connection with ‘fuel measurements. the, control timer I23 which includes a gear re When the operator desires to make a measure duction I34 and cams I35 and I36. The cams ment of the circulation rate he turns the selec I35 and I36 operate contacts I31 and I38 respec tor switch 86 to the “Oil Test” position. Current tively. The cams I35 and I36 are arranged to then ?ows from the lead 85 through the contacts hold their respective contacts closed for exactly I56 of selector switch section 89 and lead 94 to one minute and for one half minute respectively section 92, through its contacts I51, leads I58 and from the time the brake solenoid I22 is energized. I59, a solenoid I60 and through a lead |6I to the The closure of the contacts I38, which occurs aft return lead 13. The solenoid I60 closes the valve er the contacts I31 have been closed, allows cur 5| thereby preventing the draining of oil from rent to flow from the lead 68 through the lead the trap tank 41 to the weigh tank 48. As the I29, a lead I39, the contacts I38, a lead I40, the weight of the tank 48 decreases and the indicator coil of a relay MI, a lead I42 and the lead I00 to 60 passes the zero indicium of the series of in the return lead 14. This energizes the relay I4! dicia 63 the indicator 6| interrupts the light from causing it to close its contacts I43 thereby al a light source I62 to a photocell I63 incorporated in the photoswitch 64 thereby causing an asso lowing current to ?ow from the lead I40 through the contacts I43, a lead I44, the closing coil I45 ciated relay I64 to close its contacts I65. Cur of the latch relay 98, and a lead I46 to the return rent then flows from the selector switch section 90 through its contacts I66, a lead I61, the now lead 14. This operates the latch relay 68 to open closed contacts I65, and a lead I68 to the lead I I6 its contacts I04 and I I8 and close its contacts I41 and. I48. The opening of the contact I04 does not 70 and from it through the lead II1, contacts II8, leads I20, I2I, the brake solenoid I22, and then de-energize the solenoid I06 which operates the through leads I24 ‘and 8| to the return lead 13. valve I2 because a parallel circuit from the lead Current also flows at this time from the lead I20 I02 through contacts I99 of the relay I26 has been through lead I25 into the coil of the relay I26. completed so that current may flow from the lead I02 through a lead I50, the contacts I49, and a 75 The control timer now operates and closes the 7 2,409,982 contacts I31 and I38 in the order mentioned. The closure of the contacts I38 allows current to ?ow from lead 68 through leads I29 and I39, contacts I38, lead I 49, the coil of the relay ‘MI, and leads I42 and I98 to the return lead 14. Re lay I4I thereupon closes its contacts I43 and cur rent ?ows from the lead I 48 through the contacts I43, the lead I44, and the closing coil I45 oi the latch‘ relay 98. This energizes the latch relay 8 the revolution counter I92 will run for exactly one-tenth of a minute. The revolutions com pleted in this time and indicated by the revolu tion counter when multiplied by ten will give the speed of the engine in revolutions per minute. A third switch I95 is also provided to energize the solenoids I 82 and I83 and thereby operate the timer and revolution counter during the dura and it closes its contacts I41 and I48 and opens 10 tion of a fuel or oil circulation rate test. A pilot light I96 is connected between the lead H9 and its contacts I 94 and H8. Opening the contacts the lead 89 which is in turn connected to the re H8 leaves the relay I26 and the brake solenoid turn lead 13 and is intended to serve as an indi energized solely through the cam controlled con cation to the operator as to when he may safely tacts I31. At the expiration of one-half minute start a test or if a test is in operation, the pilot from the time that the indicator 6| interrupted light I96 is on during a fuel test or oil test and. the light to the photocell I63, the contacts I38 are during the half minute after an oil circulation opened and the relay MI is released and closes its test. contacts I69. Current may then flow from sec This method of measurement gives an accurate tion 92 of the selector switch 86 through con indication of rate of ?ow of liquid, in terms of tacts I51, leads I58 and I19, the now closed con pounds per minute and is applicable to other tacts I69, a lead I1I, now closed contacts I48 of measurements of liquid ?ow besides those speci? the latch relay 98, lead I12, parallel leads I13, the cally disclosed. The apparatus may be varied solenoids I14 and I15 which control the valves 54 according to the speci?c needs without depart and 51 respectively, and then through leads I16 ing from the spirit of the invention. ‘ and I11 and lead I5I to the return lead 13. The "*valve 54 interrupts the‘?ow of oil from the weigh tank 48 while the valve 51 establishes ?ow to the engine from the trap tank 41 through the b'y-pass 56. Since both the valves 5I and 54 are now closed the scale is maintained at rest and the quantity of oil removed during the half minute is indicated on the series of indicia 63. For con venience the indicia 63 are arranged to indicate pounds per minute even though the test period Having described the invention, I claim: 1. In a device for measuring the rate of ?ow of liquid, in combination, a supply tank in which a supply of liquid is maintained, a weigh tank, a weighing scale for supporting the weigh tank, piping from the supply tank to a liquid receiving system, a branch pipe to saidweigh tank, an electrically controlled normally open valve in the pipe to each tank, said weigh tank being ?lled from said supply tank when both valves are open, an electrical control system including an inter val timer, manually operable means to condition time, by opening the contacts I31, it de-energizes the electrical control system to cause said valve itself and the relay I26. After the operator notes in the pipe from the supply tank to interrupt the the reading he returns the selector switch to “Reset” which in turn energizes the latch re 40 ?ow of liquid from said supply tank, means actu ated by the scale to start the timer when the lease coil 91 to unlatch the relay 98. The open weight of liquid in said weigh tank reaches a ing of the contacts I51 of section 92 of the se predetermined amount, and means actuated by lector switch de-energizes the solenoids operat the timer to cause said valves to interrupt the ing the valves to return them to their normal ?ow from the weigh tank and re-establish ?ow positions. , from the supply tank, said manually operable A timer and revolution counter may be very means being adapted upon return to normal po conveniently added and are shown in Figure III. sition to cause said electrical control to open said The timer employs a friction clutch I18 which is valves and allow flow to the weigh tank in prepa controlled ,by a brake I19 to transmit motion ration vfor a succeeding test. from the synchronous motor 18 to the clockwork 50 2. In a device for measuring the rate of flow of I88 and the cam IBI. The clockwork runs as liquid, in combination, a supply tank in which a long as the solenoid I82 controlling the clutch I18 supply of the liquid is maintained, a weighing is energized. Thus if it is desired to measure a scale, a weigh tank supported by the scale, piping particular interval of time a switch I83 is closed from said supply tank to a liquid receiving system to allow current to flow from the lead 68 through 55 including a branch connection to said weigh tank, the lead I29, a lead I84, the switch I83, leads I85 electrically controlled Valves to control the flow and I86, the solenoid I 82 and the lead 88 to the from each of said tanks, electrical means for con return lead 18. ‘The clockwork I88 runs during trolling the valves, manually operable means for the time the switch is closed. .When the switch conditioning said electrical means to close the I89 is closed current also flows through the lead valve to said supply tank, an interval timer, I85, 3, lead I81, a solenoid I88, and a lead I89 to means actuated by the scale for starting the the return lead 13.‘ The solenoid I68 controls a timer when the weight of liquid in the weigh tank friction clutch I99, similar to the clutch I18, equals a predetermined amount, said electrical which connects a shaft I9I which turns at en means being controlled by said timer to close the gine speed with a registering counter I92. The ‘ valves to said weigh tank at the termination of counter I92 thus indicates the revolutions com the time interval and thus maintain the, weight pleted during the time interval the switch I 88 of the weigh tank at that weight reached at the was closed. Another switch I93 is provided and termination of the predetermined time interval. is connected in series with a set of contacts I94 3. In a device for measuring the rate of flow of which are controlled by the cam I8I which makes liquid, in combination, a supply tank in which a a revolution in one-tenth of a minute. If the supply of the liquid is maintained, a weigh tank, switch I93 is closed and the switch I83 is closed a weighing scale for supporting the weigh tank, momentarily, long enough for the cam I 8| to piping from said supply tank to a liquid receiv turn far enough to close the contacts I94, the switch I83 may be opened and the timer I80 and 75 ing system including a branch connection to said is one-half minute. The timer continues to run until the minute interval is completed at which weigh tank, electrically controlled valves in the 2,409,982 connections to the tanks, electrical means for con trolling the valves, manually operable means for i starting a measurement by conditioning said electrical means to close the valve to said ‘supply tank, an interval timer, means actuated by the scale for starting the timer, said electrical means 10 and rate of circulation of lubricating oil. during the test of an internal combustion engine, in combination, a trap tank for receiving oil from the engine, a weighing scale, a weigh tank sup ported on the scale, a piping system to lead oil returned from the engine to the trap tank, from the trap tank to the weigh tank, and from the being conditioned by said timer to allow with weigh tank to the engine, electrically controlled drawal of liquid from the weigh tank for a prede valves in the pipes between the tanks and the termined time and then close the valve to said weigh tank and the engine, a by-pass pipe in weigh tank to maintain the residual liquid in the 10 cluding an electrically controlled valve connected weigh tank to permit determination of the weight between the outlet of the trap tank and the pipe of the amount withdrawn. to the engine, an over?ow pipe connecting the 4;. In a device for measuring the consumption upper portion of the trap tank to the piping to and rate of circulation of lubricating oil during the engine, and electrical means to control the 15 the test of an internal combustion engine, in valves, said electrical means being responsive to combination, a trap tank for receiving oil from manual control to interrupt flow into said weigh the engine, a weighing scale, a weigh tank sup tank, an interval timer, means on said scale to ported on the scale, a piping system to lead oil start said timer, said electrical means being re returned from the engine to the trap tank, from sponsive to said timer to allow oil to be drained the trap tank to the weigh tank, and from the from the weigh tank for a predetermined time weigh tank to the engine, electrically controlled after the weight of the tank has been brought to valves in the pipes between the trap tank and the a de?nite value and thereafter prevent ?ow from weigh tank and between the weigh tank and the or to the weigh tank so the weight loss for the engine, a by-pass pipe including an electrically predetermined time may be determined. controlled valve connecting the outlet of the trap '7. In a device for measuring the consumption tank to the pipe to the engine, a manually con and rate of circulation of lubricating oil during ditioned electrical control system for controlling the test of an internal combustion engine, in said valves, an interval timer, means actuated combination, a trap tank for receiving oil from by the scale when the weight thereon is a speci the engine, a weighing scale, a weigh tank sup 30 ?ed amount for starting the timer, said electrical ported on the scale, a piping system to lead oil control being responsive to manual control to returned from the engine to the trap tank, from condition the valves to trap oil in the trap tank the trap tank to the weigh tank, and from the and allow withdrawal of oil from the weigh tank, weigh tank to the engine, electrically controlled said electrical control being responsive to said valves in the pipes between the tanks and the timer to condition said valves at the termination weigh tank and the engine, a, by-pass pipe in of a speci?ed time interval to interrupt all flow cluding an electrically controlled valve connected to or from the weigh tank while supplying the between the outlet of the trap tank and the pipe engine through the by-pass. to the engine, a pipe connecting the piping be 5. In a device for measuring the consumption tween the weighltank and the trap tank to the and rate of circulation of lubricating oil during 40 upper portion of the trap tank to serve as a vent the test of an internal combustion engine, in for the weigh tank, and electrical relays to oper combination, a trap tank for receiving oil from ate the valves, a manual control to condition said the engine, a weighing scale, a weigh tank sup relays and associated valves to interrupt flow to ported on the scale, a piping system to lead oil ‘said weigh tank, an interval timer, a photoswitch returned from the engine to the trap tank, from 45 on said scale to start said timer, said relays being the trap tank to the weigh tank, and from the responsive to said timer to allow oil to be drained weight tank to the engine, electrically controlled from the weigh tank for a predetermined time valves in the pipes between the tanks and the after the weight of the tank has been brought to weigh tank and the engine, a by-pass pipe includ a de?nite value and thereafter prevent ?ow from ing an electrically controlled valve connected be or to the weigh tank so the weight loss for the tween the outlet of the trap tank and the pipe to predetermined time may be determined. the engine, an over?ow pipe connecting the up 8. In a device for measuring the rate of flow of per portion of the trap tank to the piping to the a liquid, in combination, a supply tank, piping engine, a pipe connecting the piping between the from said supply tank to a liquid receiving sys weigh tank and the trap tank to the upper por tem, a'weigh tank, a weighing scale supporting tion of the trap tank to serve as a vent for the said weigh tank, a single connection from said . weigh tank, and electrical means to operate the weigh tank to the piping from said supply tank, a valve in the connection to each tank, said weigh tank being disposed at an elevation slightly less tank, an interval timer, means on said scale to 60 than said supply tank so that it ?lls- by gravity valves, said electrical means being responsive to manual control to interrupt ?ow from said trap start said timer, said electrical means being re sponsive to said timer to allow oil to be drained from the weigh tank for a predetermined time after the weight of the tank has been brought to a de?nite value and thereafter to condition said valves to prevent ?ow from or to the weigh tank so the weight loss for the predetermined time may be determined. 6. In a device for measuring the consumption therefrom, an interval timer, means on said scale for starting said timer, means for operating said valves, said last named means being responsive to manual control to interrupt flow from said supply tank and responsive to said timer to in terrupt flow from said weigh tank‘and re-estab lish flow from said supply tank. RALPH B. LONGMATE.