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Патент USA US3023943

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March 6, 1962
J. E. WEGLEY ET AL
3,023,933
LIQUID DISPENSING APPARATUS
Filed July '7, 1954
2 Sheets-Sheet l
3
March 6, 1962
J. E. WEGLEY ETAL
3,023,933
LIQUID DISPENSING APPARATUS
Filed July 7, 1954
2 Sheets-Sheet 2
a
5
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ATJVKNEYY
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3,623,933
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Patented Mar. 6, 1962
1
2
3,023,933
dispensing apparatus which will automatically vary the
length of time the dispensing valve is permitted to remain
open for a particular dispensing operation in accordance
LIQUID DISPENSING APPARATUS
James E. Wegley, Earle J. Wegley, and John Thomas Cal
houn, Minneapolis, Minn, assignors to Jim-Jak In
dustries, Incorporated
Filed July 7, 1954, Ser. No. 441,798
13 Claims. (Cl. 222—70)
This invention relates to liquid dispensing machines.
More particularly it relates to apparatus for attachment
to the discharge outlet of a liquid container adapted to
enable the user to dispense the liquid in a large number
of unitary equal volumes, the apparatus preferably being
part of a Vending device.
Coin operated vending machines have become increas
ingly popular in offices, public buildings and other public
with the hydrostatic pressure Within the container at the
5
time of that particular dispensation.
These and other objects and advantages of our inven
tion will more fully appear from the following descrip
tion made in connection with the accompanying drawings
wherein like reference characters refer to similar parts
throughout the several views and in which:
FIG. 1 is a front elevational view of a complete liquid
dispensing machine embodying our invention;
FIG. 2 is a diagrammatic view of the electric circuit
system utilized in our apparatus;
15
FIG. 3 is a front elevational view of the automatic regu
lating mechanism for regulating the length of time the
and semi-public places in recent years. These machines
dispense the particular commodity being sold at a mini
dispensing valve remains open during the various respec
tive individual dispensations of liquid from the bulk liquid
mum of cost, labor and effort and are particularly suc
container;
cessful where the product is already packaged or wrapped
FIG. 4 is a vertical sectional view taken approximately
in individual units such as in the case of candy bars. In
along line 4-4 of FIG. 3;
the vending of liquids, however, the problem is more
complicated in that the liquid is preferably delivered to
along line 5—5 of FIG. 3; and
FIG. 5 is an end elevational view taken approximately
the dispensing machine in bulk form so as to avoid the
FIG. 6 is a vertical sectional view taken along line- 6—6
cost of individual packaging of the sales unit. Therefore 25 of FIG. 3.
the dispensation or vend is preferably made from a bulk
One embodiment of our invention is shown in FIGS.
source contained within the dispensing machine. This
l-6. FIG. 1 in particular shows a complete liquid dis—
involves an inherent problem, however, of compensating
pensing machine which is coin actuated and constructed
for the variations in hydrostatic pressure within the con
to provide dispensations of the liquid from the liquid
tainer as it is gradually emptied.
container in equal volumes regardless of the depth of the
In order to provide substantially self-operating dis
liquid in the container at the time of the particular vend.
pensing machines, it is necessary that the machine com
As shown, the apparatus is comprised of a liquid con~
mence dispensing immediately after the coin is inserted
tainer C which has insulated walls to maintain the liquid
and continue until a sufficient volume has been dispensed
at a desired temperature within a liquid containing cham
whereupon the dispensing device discontinues its dis 35 ber in the interior of the chamber. This container C has
pensing operation. The most desirable means of ac
a discharge outlet to which is secured a solenoid actuated
complishing this has in the past been to provide mech
valve V which serves to regulate the outward ?ow of the
anism for opening a valve at the discharge outlet of the
liquid through the discharge outlet of the container. As
liquid container and maintaining it in open position for a
shown, there is a paper cup rack R from which a supply
given time interval at the end of which the valve is closed.
of paper cups such as 10 may be obtained by the pur
This type of means would be ideal if the liquid container
chaser.
were always ?lled to a given level, but since this is not
|The solenoid valve V is of a type frequently used and
feasible, such devices will dispense varying volumes ac
which may be readily purchased upon the market. The
cording to the height of liquid in the container. For ex
particular valve shown is of the 115 volt, 6O cycle variety.
ample, during a given time interval during which the valve
Extending upwardly from the uppermost portions of the
is opened, a larger volume will be dispensed if the con
valve V is an electric cable 11 which connects the valve
tainer is ?lled than if it is approximately empty. Thus it
to a metal housing 12 and passes through the upper por
can be seen that unequal volumes will be dispensed un
tion thereof and is electrically connected to electric termi~
less some accurate means is provided for compensating
nals 13 and 14- of a normally closed microswitch indicated
50
for the variations in hydrostatic pressure within the con
generally as 15. (This microswitch 15 is electrically con
tainer. Our invention is directed toward overcoming this
nected within an electric circuit system indicated generally
difficulty.
as S which is best shown in FIG. 2. The microswitch 15
It is a general object of our invention to provide novel
has a circuit breaker 16 extending downwardly from its
and improved liquid dispensing apparatus of inexpensive
and simple construction and operation.
lower surface and carries a pressure plate 17 secured to its
A more speci?c object is to provide a novel and im
proved liquid dispensing apparatus which though simple
in construction will automatically compensate for vari
ations in hydrostatic pressure within the liquid container
so as to insure dispensations of equal predetermined vol
ume throughout the course of the dispensing operations.
Another object is to provide novel and improved liquid
dispensing apparatus which Will insure the dispensation
of equal predetermined volumes throughout the entire
dispensing operation from a particular container.
Another object is to provide a simple and novel liquid
dispensing mechanism for accurately adjusting the length
of time the dispensing valve remains open in accordance
undersurface and extending downwardly therefrom. The
pressure plate 17 as best shown in FIG. 3 is in position to
cam the circuit breaker 16 inwardly and thereby break the
circuit which normally passes through the microswitch 15.
Referring now to FIG. 2 there is shown diagrammati
60 cally an electric circuit system originating from a source
of electric power (not shown) and being carried by main
lines 18 and 19. The main line 18 is connected by a
branch line 20 to one of the terminals of the normally
closed microswitch 15. The line 21 extends from the
other terminal 14 of the microswitch to a holding relay 22.
This holding relay is connected by line 23 to a coin op
erated switch 24 which is normally open. The coin op
erated switch 24 is connected by an electrical line 25 to
with the extent to which the liquid container has been
the electric motor 26 to be hereinafter referred to and de
70 scribed more speci?cally. An electric line 27 extends
emptied by previous dispensations.
Another object is to provide novel and improved liquid
from the vmotor to the solenoid valve V and the other lead
3
3,023,933
4
line 19 is connected to the other terminal of the solenoid
metal screws 37 and 38 is a U-shaped mounting bracket
valve. Thus it can be seen that when the coin operated
switch '24 is closed through the insertion of a coin an elec
will be energized and the solenoid valve wiil be moved
39 which extends downwardly below the lower edge of
the mounting plate 36 and then upwardly again on the op
posite side. This mounting bracket 39 has a free end
portion 3%.
Mounted upon the mounting plate 36 for free rotation
from normally closed position to open position to permit
relative thereto is a ratchet wheel indicated generally as
tric circuit will be closed through the holding relay 22, the
motor 26, and the solenoid valve V so that the motor 26
the liquid to ?ow outwardly therethrough from the con
40. This wheel has teeth 40a preferably equal in num
tainer C.
ber to the number of unit dispensing volumes contained
The coin operated switch is part of an interchangeable 10 in the container C when the latter is ?lled. In other
coin operated relay actuating unit which is not shown in
words, if each time it is desired to dispense the liquid
detail herein'but is of the 115 volt, 60 cycle type. This
in unit volumes of say, a quarter-pint and the container
type of unit accepts different types of coins but in each
C contained 100 such quarter-pints, then the number
event functions insofar as the instant invention is con
of teeth should preferably be 100. The ratchet wheel
cerned merely to close the coin operated switch 24.
15 40 is mounted on a shaft 41 which rotates relative to the
When the holding relay 22 is energized through the
plate 36. Also mounted on the shaft 41 is a rotary cam
closing of the coin operated switch 24, it functions to close
a pair of normally open switches 28 and 29. As shown,
42 which has a radially spirally shaped camming surface
43. This caming surface 43 is correlated with the hydro
the lead line 18 has a branchline 30 which is connected to
static pressure within the container C and is shaped to
the switch 28. The other terminal of the switch 28 is 20 re?ect the time required for the valve V to dispense equal
connected by an electric line 31 to the line 27 which ex
volumes at each of the dispensing steps required to empty
tends between the motor 26 and the solenoid valve V.
the container. Thus, the camming surface 43 varies in
The switch 29 is electrically connected by an electric line
radial distance from the center of the shaft 41 so that
32 to the main line 19. It will be noted that the branch
as it rotates in a clockwise direction as viewed in FIG. 3,
line 32 is also electrically connected to the line ‘25 which
the camming surface gradually increases in distance from
the center of the shaft 41.
extends between the motor '26 and the coin operated
switch 24. The other terminal of the switch 29 is con
This rotary cam 42 is carefully constructed to re?ect
nected by a branch line '33 to the line 23 which extends
the amount of time required to insure equal volumes being
between the holding relay 22 and the coin operated switch
dispensed from the valve V during the various stages
24.
30 of the emptying of the container C. We arrived at the
From the above it will be seen that when the normally
shape of this camming surface by ?rst selecting a pre
open switches 28 and 29 are closed by the energization
determined volume which we desire to dispense for the
particular coin to be accepted by the machine. Then we
of the holding relay 22 (which in turn is accomplished by
?lled the container C and step by step emptied the con
the closing of the coin operated switch 24), two holding
circuits are established through the solenoid valve V and 35 tainer C, dispensing unit volumes therefrom by manual
the motor 26. The opening of the coin operated switch 24
operation of the valve V. We timed the amount of time
required to dispense each of the unit volumes removed
will not cause the solenoid valve V to close because a
current will continue to be supplied thereto. This holding
in this manner and thereafter drew a curve of the time
required throughout the entire emptying operation.
circuit can be traced ‘as extending from the lead line 18
through the branchline 30, through the switch 28, thence
40 Thereafter we constructed the rotary cam 42 with its
camrning surface 43 so that the radius of the camming
through the solenoid valve V to the main line 19. Similar
ly, the opening of switch 24 will not cause the motor 26 to
stop because a current will continue to be supplied thereto
through the holding circuit which can be traced as extend~
ing from the lead line 18 through the branch line 20, 45
diately hereabove.
thence through the normally closed microswitch 15 and
the line 21 to the holding relay 22, ‘from there through the
line 23 through the switch 29, thence through the line 32
at its opposite end, this cam follower constantly engaging
the camming surface 43 as the ratchet wheel or disc 40
to the main line 19.
rotates in a clockwise direction as viewed in FIG. 3. A
In this manner the switches 28 and
surface follows the curve arrived at as described imme
Pivotally mounted upon the upper free end portion
39a of the mounting bracket 39 is a metal link L. This
link L has a bifurcated end 44 and carries a cam follower
29 will be maintained in closed position and their closing 50 spring 46 is mounted on the shaft 47 which carries the
link L and this spring engages the mounting bracket 39
results in an electric supply being carried to the motor 26
and the solenoid valve V. This single circuit can be traced
with one of its ends and the upper surface of the link
L with its other end as best shown in FIG. 3 so as to
by commencing with the lead line '19 through the solenoid
constantly urge'the follower 45 into ?rm engagement
valve V through the line 27 to the motor 26, thence along
the line 25 back to its intersection with line 32 through 55 with the camming surface 43.
Mounted on the opposite side of the mounting plate
the switch 29 and the line 23 to the relay 22, thence
36 is a synchronous motor 48 which has a gear train in
through the line 21 to the switch 15 and thence back to
dicated generally as 49 associated therewith and from
the lead line 18 via the branch line 20. From this it can
which a drive shaft 50 extends outwardly. This syn
be seen that once the coin operated switch 24 is actuated,
the solenoid valve V and the motor 26 will continue to be 60 chronous motor is the motor indicated by the numeral
26 in the diagrammatic electrical system S in PEG. 2
energized until the main circuit is broken by the circuit
and is of the 115 volt, 60 cycle type running at 2 r.p.m.
breaker 16 as a result of it being forced upwardly by the
and is provided with a shift, this type being disclosed in
pressure plate 17.
'
United States Letters Patents Nos. 2,334,040, 1,935,208,
The housing 12 is provided with coin receiving slots
34 and 35 and these, of course, are connected with the 65 1,996,375, 2,049,261 and 2,353,305. This motor is ca
pable of being turned backwardly when not energized
without damage resulting thereto. The shaft 50 is driv
ably connected to another shaft 51 which is pivotally
Mounted within the housing 12, and best shown in
mounted in the plate 36 and extends through the plate
FIGS. 3-6‘, is the regulating mechanism indicated gen
erally as M for regulating the length of time the solenoid 70 and outwardly on the opposite side. On the opposite
side the shaft 51 carries a radially extending camming
valve V is permitted to remain in open position. This
interchangeable coin operated relay actuating unit re
ferred to above but not shown herein.
post 52 which is rotated by the shafts 50 and 51 in a
clockwise direction as viewed in FIG. 3.
viewed in FIG. 3, is mounted the normally closed micro
Mounted on the shaft 51 and urging the same counter
switch 15. Fixedly secured to the mounting plate 36 by 75 clockwise is a coiled spring 53 which is ?xed by one of
regulating mechanism ‘as shown is comprised of a mount
ing plate '36 upon the upper lefthand corner of which, as
3,023,933
5
6
its ends to the shaft or post 51 and by its other end to
the connecting post 54 which is carried by a rotary start
dispensation of the liquid is immediately terminated.
ing plate or disk 55. The rotary starting plate 55 is free
to rotate about the shaft 51 and the connecting post 54
which extends outwardly therefrom is passed through the
When the motor 48 is no longer supplied with current,
the spring 53 is then able to immediately cause the motor
to shift back to substantially its original position so that the
camming post or lever 52 will again engage the starting
bifurcated end 44 of the link L so that as the bifurcated
post 56. However, this starting post 56 will be moved
end of the link L is cammed upwardly by the cam 42,
very slightly in a counter-clockwise direction because the
the connecting post 54 will be urged upwardly, thereby
release of the camming lever 58 permits the spring mem
causing the starting plate 55 to rotate in a counter
ber 60 to force the ratchet 63 upwardly to its original
clockwise direction. When this takes place, the starting 10 position and thereby cause the ratchet 63 to rotate the
post or stop means 56 moves downwardly as viewed in
FIG. 3 and the camming post 52 swings in a counter
clockwise direction along therewith since it is urged in
that direction by the coiled spring 53. Pivotally mount—
ratchet wheel 40 the spacing of one tooth in a clock
wise direction. This rotation, of course, causes the cam
42 also to rotate slightly in a clockwise direction and to
force the cam follower 45 downwardly slightly.
The
ed on a pivot post 57 which extends outwardly from the 15 downward movement of the cam follower 45 causes the
mounting plate 36 is a camming lever 58. This camming
lever is pivoted by its medial portion on the post 57 and
carries an upwardly extending pressure plate cam 59 in
position to engage the pressure plate 17 when the cam~
bifurcated end 44 of the link L to swing slightly upwardly
thereby causing the starting plate 55 to rotate in a
counter-clockwise direction very slightly and reposition
the starting post 56 as previously herein described.
ming lever pivots about the post 57. A spring 60 is 20
Thus it can be seen that for each energization of the
mounted around the pivot post 57 and is connected by
electric circuit system, the starting post 56 moves in a
one of its ends to an anchor post 61 which is carried by
the mounting plate 36. This spring urges the camming
counter-clockwise direction very slightly so that each
time thereafter the motor 48 has to run slightly longer
before it will have cammed the camming lever 58 to cir
lever 58 in a counter-clockwise direction since its other
end is connected to an car 62 which extends outwardly 25 cuit breaking position and thereby terminate the particu
from the pivoted end of a ratchet 63 which is pivotally
mounted upon the end portion of the camming lever 58.
In this manner the upper end portion of the ratchet 63
is constantly urged against the teeth 40a of the ratchet
wheel 40, while at the same time, the free and camming
end of the camming lever is urged in a counter-clockwise
direction. A spring lock member 64 is also carried by the
anchor post 61 and it extends outwardly therefrom into
constant engagement with the teeth 40a of the ratchet
lar dispensing operation taking place for that particular
energization of the electric circuit system. By the time
the container C is substantially emptied, the portion of
the camming surface 43 immediately adjacent to the
starting position will have swung into cam-follower en
gaging position so that the motor 48 will be energized a
substantially longer time before moving the camming
lever 58 to circuit breaking position. As a result, of
course, the valve V Will remain in open position a sub
wheel 40 so as to preclude counter-clockwise rotation of 35 stantially longer time and will dispense a volume equal
the ratchet wheel. This can clearly be seen in FIG. 3.
to that previously dispensed because the hydrostatic pres
It will be readily seen that the elements 39-64 col
sure will be less.
.
lectively comprise a timing circuit breaking device which
is controlled in part at least by the cam 42.
Each time the container C is ?lled the ratchet wheel
40 should be rotated around again to the starting position
In operation the container C is ?lled with liquid and 40 shown in FIG. 3 and if this is done, the owner may be
the ratchet wheel 40 is rotated to starting position rela
assured that equal volumes will be dispensed thereafter
tive to the cam follower 45 as shown in FIG. 3. The
regardless of the extent to which the container is emptied.
machine is then set for accurate dispensation of all of the
Thus the customer who purchases a drink of liquid at
liquid in the container in equal predetermined volumes.
a time when the container C is approximately empty will
When the coin actuated switch 24 is actuated by the cus 45 receive a volume of the liquid equal to the volume re
tomer inserting a coin in one of the slots 34, 35, the
ceived by the customer who purchases a drink of the
holding relay will be energized as previously’ described.
liquid when the container is ?lled.
Simultaneously the solenoid valve V and the motor 48
Thus it can be seen that we have provided a novel
will be energized so that the valve V will be opened and
and improved liquid dispensing device which can be manu
the motor 48 will commence to operate and rotate cam— 50 factured and sold very inexpensively. In addition, it func
ming post 52 clockwise. The holding relay will con
tions in a highly improved manner so that the vendor
t1nue to maintain the circuit to the motor and the sole
may always be assured that the purchaser will receive
noid valve in closed position until the main circuit is
an accurate predetermined amount of the liquid regard
?nally broken by the circuit breaker 16. When the motor
less of the extent to which the container has been emptied.
48 commences to operate, it causes the camming post 55 This eliminates much of the dissatisfaction so prevalent
52 to rotate in a clockwise direction so that it engages the
among the machines wherein no compensation is made
free or camming end of the camming lever 58. Grad
for the variations of hydrostatic pressure within the con
ually the pressure plate cam 59 will be brought into en
tainer. Our liquid dispensing apparatus, it will be noted,
gagement with the free end of the pressure plate 17
automatically compensates for such variations in hydro~
and urge it upwardly. At the same time the end of the
camming lever 58 to which the ratchet 63 is pivotally
connected will be brought downwardly as viewed in
FIG. 3 until ?nally the teeth engaging portion of the
ratchet 63 will slip into the immediately following tooth
static pressure within the container so that once the
machine is set when the container is ?lled the purchaser
will always receive an equal volume. It should also be
noted that it is a very simple matter to reset this mech
anism in the event it is desired to re?ll the container C
and engage the same, one tooth behind its original posi 65 before it has been completely emptied. It will also be
tion. While this is taking place the spring lock 64 pre
noted that the structure is extremely simple in construc
cludes counter-clockwise rotation of the ratchet wheel
tion and is therefore not likely to have extensive repair
44). Shortly thereafter the pressure plate cam 59 will
and maintenance problems.
have cammed the pressure plate 17 upwardly su?iciently
to force the circuit breaker 16 into circuit breaking posi
tion. When this takes place, the entire circuit is broken
and the holding relay releases the normally open switches
28 and 29 thereupon shutting off the circuit to the sole
noid valve V and to the motor 48. The solenoid valve
thereupon immediately returns to closed position ‘and the 75
It will, of course, be understood that various changes
may be made in the form, details, arrangement and pro
portions of the parts without departing from the scope
of our invention which consists of the matter shown and
described herein and set forth in the appended claims.
What is claimed is:
1. Liquid dispensing apparatus for use in conjunction
3,023,933
8
with a container having a liquid containing chamber and
a discharge outlet for effecting equal volume dispensa
tions of liquids from the container regardless of the
depth of the liquid therewithin, said apparatus compris
in that position for a predetermined period of time in
coordination with the depth of the liquid within the con
tainer whereby a substantially constant volume of liquid
will be dispensed during each dispensing operation, said
electric circuit including a ?rst switch, manually con
ing a solenoid valve adapted to be connected to a discharge
trolled, for opening said valve, drive means energized in
outlet of a container to regulate the ?ow of liquidthere
response to said ?rst switch to operate when said valve is
through, an electric circuit system connected to said valve
open, a second switch for closing said valve, means for
intermittently actuating the same between open and closed
actuating said second switch to close said valve, the last
position, and a cam-controlled regulating mechanism con
nected to said system and regulating the length of time 10 means including mechanism connected with said second
switch and the ?rst mentioned means to progressively in
said solenoid valve is maintained in open position, said
crease the length of time between energization of said
mechanism including an electric motor connected elec
?rst mentioned means and actuation of said second switch,
trically with said electric circuit system and controlling
said mechanism being so correlated with the reduction of
the time said valve remains in open position, a rotary cam
liquid depth within the container upon each dispensing
mounted adjacent said motor and having a camming sur
operation that a substantially equal volume of ?uid is
face correlated with the hydrostatic pressure within such
dispensed during each dispensing operation.
a container at various stages throughout the operation
5. Liquid dispensing apparatus for use in conjunction
of emptying the container, a cam follower associated
with a liquid container for the dispensation of equal
with said cam and connected with said motor and resetting
said motor after each dispensation to thereby increase the 20 volumes of liquid from that container regardless of the
depth of the liquid therewithin, said apparatus comprising
length of time said valve will be maintained in open posi
tion during the succeeding dispensation in accordance
with the hydrostatic pressure of the liquid within the
container.
2_. Liquid dispensing apparatus for use in conjunction
with a container having a liquid containing chamber and
a solenoid actuated valveadapted to be connected to a
discharge outlet of the container, an electric circuit sys
tern connected ‘tosaid valve and-intermittently actuating
the same between open and closed position, said electric
circuit including a switch for moving said valve from
open to closed position, means connected with said switch
a discharge outlet for effecting equal volume dispensa
for progressively increasing the period of time said valve
tions of liquids from the container regardless of the depth
remains in open position upon successive dispensing
of the liquid therewithin, said apparatus comprising a
solenoid valve adapted to be connected to a discharge 30 operations, said means including a camming post, means
for driving the camming post, the last means forming part
outlet of a container to regulate the flow of liquid there
of said electric circuit system.
through, an electric circuit system connected to said
6. Liquid dispensing apparatus for use in conjunction
valve intermittently actuating the same between open and
with a liquid container for the dispensation of equal
closed positions, and a cam-controlled regulating mech
amsrn connected to said system and regulating the length 35 volumes of liquid from that container regardless of the
depth of the liquid therewithin, said apparatus comprising
of time said solenoid valve is maintained in open posi
‘tion, said mechanism including an electric motor con
nected electrically with said electric circuit system and
controlling the time said valve remains in open position,
a rotary cam mounted adjacent said motor, a cam fol
lower, and linkage extending between said motor and said
cam follower whereby said motor is reset after each dis
pensation to thereby increase the length of time said
a solenoid actuated valve adapted to be connected to a
discharge outlet of the container, an electric circuit system
connected to said valve, said electric circuit including a
?rst switch, manually controlled, for moving said valve
from closed to open position, and a second switch for
moving said valve from open to closed position, means
connected with said second switch for progressively in
valve will be maintained in open position during the suc
creasing the period of time said valve remains in open
pressure of the liquid within the container.
including a cam, means for driving the cam, the last
ceeding dispensation in accordance with the hydrostatic 45 position upon successive dispensing operations, said means
3. Liquid dispensing apparatus for dispensing equal
predetermined volumes of liquid from a container regard
less of the depth of the liquid therewithin, said apparatus
comprising a container having a discharge outlet and
having a liquid receiving chamber therewithin, a solenoid
valve connected to the discharge outlet of said container,
an electric circuit system connected to said valve inter
mittently actuating the same between open and closed
position, and a cam-controlled regulating mechanism 55
connected to said system and regulating the length of
time said solenoid valve is maintained in open position
for each dispensation, said mechanism including a timing
means forming part of said electric circuit.
7. Liquid dispensing apparatus for use in conjunction
with a liquid container for the dispensation of equal
volumes of liquid from that container regardless of the
depth of the liquid therewithin, said apparatus comprising
a solenoid actuated valve adapted to be connected to a
discharge outlet of the container, an electric circuit con
nected to said valve for actuating the same between open
and closed position, said electric circuit including a switch
for actuating said valve from open to closed position, a
camming post for actuating said switch, said electric cir
cuit including means for driving said camming post, means
normally urging said camming post away from the switch,
circuit breaking device and a rotary cam having a pe
ripheral camming surface associated with said device and 60 stop means for limiting the normal position of said
camming post away from the switch, and means for
causing the same to be reset as to time for each dispensa
progressively moving said stop means away from the
tion, the radius of said cam at its peripheral camming
switch upon successive dispensing operations.
surface increasing in accordance with the drop in hydro
8. Liquid dispensing apparatus for use in conjunction
static pressure as the liquid is withdrawn from the con
tainer and being correlated with the drop in hydrostatic 65 with a liquid container for the dispensation of equal
volumes of liquid from that container regardless of the
pressure as said container is emptied, thereby insuring.
depth of the liquid therewithin, said apparatus comprising
dispensation of an equal predetermined volume each time
a solenoid actuated valve adapted to be connected to a
said valve is actuated regardless of the extent to which
discharge outlet of the container, an electric circuit con
said container is ?lled.
nected to said valve for actuating the same between open
4. In a liquid dispenser for the dispensation of equal
and closed position, said electric circuit including a switch
volumes of liquid from a container regardless of the
for actuating said valve from open to closed position, a
depth of the liquid within the container, a solenoid ac~
tuated valve adapted to be connected to a discharge out
let of the container, an electric circuit, including said
camming post for actuating said switch, said electric cir
cuit including means for driving said camming post, means
valve, for opening said valve and maintaining the valve 75 normally urging said camming post away from the switch,
3,023,933
stop means for limiting the normal position of said
camming post away from the switch, and means for
progressively moving said stop means away from the
switch upon successive dispensing operations, said stop
means including a rotatable disk and a starting post
mounted thereon in offset relation to the center of rota
tion of the disk against which said camming post is
abutted when in the normal position, and the means for
progressively moving the stop means including a pivoted
10
solenoid valve adapted to be connected to a discharge
outlet of a container to regulate the flow of liquid there
through, an electric circuit system connected to said valve
intermittently actuating the same between open and closed
' position, and -a cam-controlled regulating mechanism con
nect-ed to said system and regulating the length of time
said solenoid valve is maintained in open position, said
mechanism including an electric motor connected elec
trically with said electric circuit system and controlling
follower arm connected with said disk at one end and 10 the time said valve remains in open position, a rotary cam
mechanism connected with the other end of the follower
arm for pivoting the same in step by step fashion to
rotate said disk and position said starting post progres~
mounted adjacent said motor, there being operating means
connecting the cam and the motor for moving the cam
about its center in response to operation of the motor, the
sively further away from said switch.
cam having a camming surface correlated with the hydro
9. In a liquid dispensing apparatus, a container adapted 15 static pressure within such a container at various stages
to receive a supply of liquid to be dispensed, said container
throughout the operation of emptying the container, a cam
having a discharge outlet, valve means in said discharge
follower associated with said cam and connected with
outlet, manually controlled means for opening said valve,
said motor, the cam follower controlling the operation of
the motor, the cam being shaped to increase the length of
manually controlled means, means actuated by said timer 20 time said motor will be kept in operation and the valve
means to close said valve means a predetermined length
will be maintained in open position during successive
of time after the opening of said valve means and actua
dispensations, in accordance with the hydrostatic pressure
tion of said timer means, said timer means including
of the liquid within the container.
mechanism for progressively increasing the stated pre
13. In a liquid dispenser for the dispensation of equal
determined length of time between opening and closing 25 volumes of liquid from a container regardless of the
of said valve means upon successive manipulations of the
depth of the liquid Within the container, a solenoid
manually controlled means, whereby a substantially
actuated valve adapted to be connected to a discharge
constant volume of liquid will be dispensed during each
outlet of the container, an electric circuit, including said
dispensing operation regardless of the liquid level within
valve, for opening said valve and maintaining the valve
the container.
in the position for a predetermined period of time in co
10. In a dispensing apparatus for dispensing liquids
ordination with the depth of the liquid within the con
from containers: delivery means operable to effect delivery
tainer whereby a substantially constant volume of liquid
of liquid from a container, the delivery means including
will be dispensed during each dispensing operation, said
a valve and power-operated mechanism for opening and
electric circuit including means, manually controlled, for
closing the valve; cut-o? means for starting and stopping 35 opening said valve, drive means energized in response to
the power operated mechanism, timing means for regulat
operation of the manually controlled means to operate
ing the operation of the cut-o? means to regulate the
when said valve is open, a switch for closing said valve,
period of opening of the valve, the timing means includ
means for actuating said switch to close said valve, the
ing means to cause the cut-off means to operate the power
last means including mechanism connected with said
operated mechanism for a short time interval when the 40 switch and the drive means to progressively increase the
container is full and to lengthen the interval as the con
length of time between energization of said drive means
tainer becomes less full, whereby to counteract the effect
and actuation of said switch, said mechanism being so
of declining hydrostatic head on the rate of discharge.
correlated with the reduction of liquid depth within the
11. The combination of claim 10, wherein the power
container upon each dispensing ‘operation that a sub
operated mechanism is an electrical device, and the cut 45 stantially equal volume of fluid is dispensed during each
otf means includes a switch regulating energization of the
dispensing operation.
electrical device.
12. Liquid dispensing apparatus for use in conjunction
References Cited in the ?le of this patent
with a container having a liquid containing chamber and
timer means actuated in response to operation of said
a discharge outlet, for e?fecting equal volume dispensa 50
tions of liquids from the container regardless of the depth
of the liquid therewithin, said apparatus comprising a
UNITED STATES PATENTS
1,63 9,679
2,65 8,645
Zsoldos ____________ __ Aug. 23, 1927
Harris _______ _v_.__.___y__ Nov. 10, 1953
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