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Патент USA US2409983

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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.
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