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Патент USA US2356420

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‘Aug. 22,1944.
-
c; 'z. MONROE ~
_ " 2,356,420 > v
LIQUID MEASURING AND DISPENSING ‘APPARATUS
Filed ‘Aug. 3; 1942
2 Sheets-Sheet 1
Aug- 22, 1944v
MONROE
. 7 ~
LIQUID MEASURING AND DISPENSING APPARATUS
Filed Aug. 3, 1942
2,356,420
2 Sheets-Sheet 2
Patented Aug. 22, 1944
2,356,420
‘,1! UNITED? STATES PATENT ‘OFFICE
2,356,420
MEASURING AND DISPENSING
APPARATUS
Charles Z. Monroe, Detroit, Mich., a‘ssignor to
The American Paper‘ Bottle Company, Toledo,
Ohio, a corporation of Ohio
Application August 3, 191212, Serial No. 7,453,414
5 Claims.
‘The present invention relates to apparatus for
222-387 )
at any time or,'alternativel_y, that the liquid will
?ow from the cylinder faster than the piston
tends to expel it, an equally disadvantageous
measuring and dispensing liquids, particularly
agitated,
liquids such as milk which tend to foam when
result. ‘ Preferably, the discharge port of the
In Patent No. 2,202,073, issued to Julius E.
Wollenweber, there is disclosed and claimed a "
liquid measuring and dispensing device primarily
this port as well as expelled vhrough the port
into a waiting container.
designed and intended for use as one elementof
avcomplete automatic liquid packaging apparatus
by means of which paper containers in the form
of collapsed blanksiare successively squared-out,
Thevmeans for. and
49
coated, charged with‘milk or the like, closed, and
sealed, with
cylinder is formed in the cylinder bottom and
the‘liquid is introduced into the cylinder through
'
.to limit thespeed of operation of the machine
135
method of introducing liquid into the measuring
chamber, however, may be varied, the invention
not being limited in this respect, The invention
contemplates other changes inthe details of con
struction and arrangement of ‘the valve and pis
ton operating mechanism, as will be hereinafter
explained.
.
‘
__
I
-
: One embodiment of the-invention is illustrated
by way of example in the accompanying draw
ings, in ‘which
Y
F
'
Figure 1 is a top plan view of the mechanism
r20 showing certain of he underlying parts in dotted
lines;
Figure 2 is a side elevation of the same;
Figure 3 is a section on line 3-3 of Figure 1;
and
Figurer‘i is a diagram in which may be observed
in a rather precise manner.
The Wollenweber measuring and dispensing
device disclosed in the patent previously referred
35
40
some relationship to the rate of flow
of ?uid through said port.
arrangement the size of the With the improved
discharge port will
and sealing machine The piston 18 is ‘close
?tting and its lower or liquid contacting face has
a ‘frusto-conical portion 18’ and a circular central
50
portion I82, the piston face, when the piston is
in its lowermost position, ?tting closely the wall
of the frusto-conical lower end surface of the
measuring cylinder so as to
liquid which may have been completely .expel all
previously within the
.
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55 cylinder.
A slide valve is generally indicated at 20 and,
generallyspeaking, it is the'same in construct-ion
is minimized, there being no possibility that
lid‘uid will be discharged at. too high a velocity
60
2,356,420
the piston travels past its midpoint position IV
its vvvelocity of movement decreases,.as indicated
provided with a cylindrical port 2| which may be
brought into register with the.,circular cylinder
discharge P0131? 11!,’ and? en elenigatedx recess. 22
=by_,'the varyingudistances between
the positions
VI and the posi
accessible from its upper face only, one end of
which recess may be brought into register with
1 tions VI and VII, the same interval of time
cylinder discharge port ll while its other end is'
in open communication with duct 23v leading"
rv‘eta v, ‘the positions v and
being
" required to advance the piston from any one
_ ' > of these positions to the next position. After
downwardly from a container or other sourc'eof»
‘ passing the midpoint position IV, the valve serves
to reduce the effective area of the cylinder dis
liquid under the desired static pressure. With
the valve in the position shownin Figure 1 .the
charge port VII’ in a manner exactly the reverse
of that in whi h it served to increase the effective
valve port is partially open and the piston is at > , area of this valve port during the initial move
that point in its travel which is most remote from _ _ \ mentof the’ piston, as indicated in Figure 4.
the discharge port II, and about *to descend.
The mechanism for accomplishing this objec
During the descent of the piston, the valve 20
tive is of great simplicity. It includes a com
moves further to the right and, when the valve 15 mon horizontally disposed ‘drive shaft 40 which
port 2| is in full register with-the cylinder-port
‘l I, it is also in full register-with two discharge
,
‘conduits
24v and 25,- respectively, formed in valve
supporting block 26, ports 24 ‘and- 25 downwardly
may be rotated about a ?xed'axis at uniform ve
locity by any suitable driving means, for instance
an electric motor. Fixed on the shaft 40 is a
cylindrical cam 4| having a cam track 42 within
diverging and terminating in’ a common hori 20 which is a roller or cam follower 43. Cam fol
zontal plane just above‘v a conveyor upon which
lower 43 is rotatably supported upon a pin 44 pro
aresupported a series of containers, one of which
jecting upwardly from the end of an arm 45
is indicated at-C3 in Figures land 3 respectively.
keyed or otherwise ?xed upon a vertical shaft 46
_ The conveyor comprises the container support
rotatably supported in a vertical bearing formed
ing rail 21 and container advancing members 28
in the laterally extending portion I4’ of the side
"and 29 which, in this instance, are parallel chains
frame member l4. At its upper end shaft 46 has
provided with container engaging and pushing
‘elements28' ‘and 29', respectively. ~ The element ‘
26 issecured in valve supporting position by leaf
spring members 30 and 3| the terminalends of P‘
which are curved-as shown in‘Figures 2 and 3
?xed thereon an arm 41 extending toward the
valve 20, the free end of this arm being connected
by means of a link 48 to a pin 49 set in the pro
jecting portion 20' of the valve 20. The arrange:
ment is such that, when the drive shaft 40 is
‘and extend'over and part way around the vcyl
inder supporting rods l3. At its intermediate
point each of the spring supports 30' and 3| is
rotated‘ the slide valve 20 will be reciprocated to
effect the charging and discharging of the cyl
engaged by‘ the head of an adjustable screw one
The piston operating means includes a. crank 50
the arms of which are ?xed upon the adjacent
ends of the interrupted drive shaft 40, as seen
of which is indicated at 33 and the other at 34,
each of these screws being vertically disposed and
inder.
'
~
havingthreaded engagement with an aperture
in the underside of the valve supporting element
most clearly in Figure 2, this crank supporting
the lower end of a pitman 5| extending sub
40
'26 and each being provided with a lock nut, the
stantially vertically upwardly. The pitman 5|
lock nuts being indicated at 35 and ~36,»respec
is telescopic, comprising the rod-like lower por
tively. Screws 33 are so adjusted that the valve
tion 5la and the tubular or sleeve-like upper
supportingielemen't 26 will be resiliently urged
portion MD, the upper end of rod 5la extending
upwardly by'the' supporting spring members 30
into a cylindrical axial recess formed in sleeve
and 31, to holdthe upper surface of the valve in
5Ib, the upper‘ end of rod 51a carrying a slide
close engagement at all times with the upper
52' which engages the cylindrical inner surface
horizontal face 31 of a slideway‘ formed in the en
of the sleeve and'passing through a cylindrical
larged lower end of the cylinder casting which is
especially designed for the-reception of the valve.
aperture in a, nut 53, the pitman parts 5la and
51b being maintained in axial alignment by the
50
1-In the operation of the piston and valve it is
engagementv of the rod 5la with the nut 53 and
desired that flow of liquid downwardly through
the engagement of the annular slide 52 with the
port H, valve port 2|, and “directional ports or
inner surface of sleeve 5Ib. .Intermediate slide
ducts 24 and 25 be as rapid‘and yet as free of
52 and nut 53 is a helical compression spring 54
turbulenceas possible. Means is therefore pro
and intermediate slide 52 and the upper end of
videdffor actuating the piston and valve in timed 55 the cylindrical recess in the sleeve is a second
relationship so that, when the piston is at the top
helical compression spring 55. An extension 5|c
of vits stroke,'the cylinder being full of liquid,
of the sleeve 51b carries a roller 56 which is
and is about to initiate its downward movement,
adapted to strike, when the pitman descends,
the valve opening will‘be relatively small, the po
the upper end or head of a stop bolt 51 having
sition ‘of the piston at this‘ point being indicated 60 threaded relation with the cylindrical inner wall
at I in the diagram of Figure 4 and a correspond
of a split ferrule supported in a lateral extension
ing valve opening being indicated at IaJ The
59 of a vertical bracket also mounted upon the
piston actuating means is so designed that the
supporting rods l3. The bolt 51 comprises a
piston rather slowly gets under way and is travel
limiting stop for the sleeve-like upper end 5!!)
ling most rapidly when it reaches its midpoint, or 65 of the pitman and determines the maximum ex
position IV in Figure .4, at which'poirlt the cyl
tent of downward movement of this part.
inder port II is fully open‘as indicated at IVa
The upper end 5119 of the pitman is connected
in this?gure. The vertical distance between po-'
to ‘thepiston l8 by means which includes the
sition I and position II in Figure 4 indicates the
rocking lever GI and the link 62, lever 6| being
extent of piston travel during a certain interval 70 pivotallyv mounted at an intermediate point upon
of time, the distance between position'II and}
a pin 63‘ which extends through an aperture in
position III, and likewise the distance between po
the link 60 and through two aligned apertures
sition III and position IV in this ?gure also indi
in the bifurcated upper end of the pedestal“).
cating the extent of travel of the pistons during
It
will be observed that there are three pairs of
75.
the succeeding and'equal intervals of time. After
2,356,420
aligned apertures in the bifurcated upper end
of the pedestal 60, which are indicated at 60a,
60b and 600, and three corresponding apertures
in the rocking lever 6|,\ indicated at Bla, Glb
3
2. A liquid dispensing apparatus for delivering '
a ‘precisely measured quantity of liquid such as
milk, comprising in combination, a measuring
and file, the constructiondescribed thus making
possible the shifting of the fulcrum axis about
which the lever 6| rocks as the pitman vertically
reciprocates. The extent of sliding movement
discharge of ?uid from the measuring chamber,
a piston within and slidably engaging the wall
of the piston may thus be varied so that the
quantity of the liquid to be delivered may be 10 of said chamber, said piston being movable to
changed from time to time. Fine adjustments
in piston travel are obtained by vertically adjust
ing the screw 51.
In the operation of the mechanism, the slide
valve is ?rst moved into a position such that the 15
chamber, and thereafter moving toward closed
elongated duct 22 is in register with the cylinder
position, reacting such position after the comple
port H and the supply duct 23. The piston is
tion of the discharging stroke of the piston.
then in its lowermost position. The valve will
3. A liquid dispensing apparatus for delivering
remain in this position while the piston rises and
a precisely measured quantity of liquid such as
the cylinder ?lls, mainly by reason of the pres
milk, comprising in combination, a measuring
sure of liquid from below. After the ?lling op
chamber having a discharge port formed in the
eration has been completed, the valve will be ?rst
Wall thereof, a valve mounted for sliding move
actuated to close the port II and to immediately
ment across the port for controlling the rate of
thereafter slightly open it, the effective port
discharge of ?uid from the measuring chamber,
opening being that indicated in position Ia of
Figure 4 of the drawings. The piston then im 25 a piston within and slidably engaging the wall
mediately begins its descent, increasing its speed
of movement by reason of the action of the crank
of said chamber, said piston being movable to
ward and away from said port and being so
formed as to expel the entire contents of the
50 until the piston reaches its midpoint, after
chamber on its discharging stroke, and means
which the crank action is such that the speed of
piston movement decreases, the speed of rotation 30 for producing synchronized movements of the
piston and valve during the discharging of said
of the crank, of course, being uniform, but the
chamber, the valve opening increasing as the
action being such that its effective lever Iarm
piston speed increases and decreasing as the pis
varies from instant to instant as it rotates in well
ton speed decreases.
.
known manner. The effective opening of the 35
discharge port I l is, therefore, varied from in
4. A liquid dispensing apparatus for delivering
charging mechanism so constructed foaming of
discharge of ?uid from the measuring chamber,
a precisely measured quantity of liquid such as
stant to instant as the speed of descent of the
milk, comprising in combination, a measuring
piston IS in its cylinder varies from instant to
chamber having a discharge port formed in the
instant during its travel. The arrangement is
such that the milk will ?ow to the container 40} wall thereof, a valve mounted for sliding move
ment across the port for controlling the rate of
with the least amount of turbulence. With a
a liquid such as milk is decreased to a minimum
and the speed of actuation of an automatic mech
a piston within and slidably engaging the wall
of said chamber, said piston being movable to
anism which includes the charging mechanism is 45 ward and away from said port and being so
formed as to expel the entire contents of the
not checked by reason of the foaming tendency
chamber on its discharging stroke, and means
of the liquid being handled.
for producing synchronized movements of the
Having thus described the invention, What is
piston and valve during the discharging of said
claimed as new and desired to be secured by Let
ters Patent is:
50 chamber, the valve opening being roughly pro
portional to the rate of delivery of the ?uid from
1. A liquid dispensing apparatus for delivering
the chamber.
a precisely measured quantity of liquid such as
5. A liquid dispensing apparatus for delivering
milk, comprising in combination, a measuring
a precisely measured quantity of liquid such as
chamber having a discharge port formed in the
wall thereof, a valve mounted for sliding move 55 milk, comprising in combination, a measuring
chamber having a discharge port formed in the
ment across the port for controlling the rate of
wall
thereof, a valve mounted for sliding move
discharge of ?uid from the measuring chamber,
ment across the port for controlling the rate of
a piston within and slidably engaging the wall
of said chamber, said piston being movable to
discharge of ?uid from the measuring chamber,
a piston within and slidably engaging the wall
ward and away from said port and being so 60
of said chamber, said piston being movable to
formed as to expel the entire contents of the
ward and away from said port and being so
chamber on its discharging stroke, and means
formed as to expel the entire contents of the
for producing synchronized movements of the
chamber on its discharging stroke, and means
piston and valve during the discharging of said
for producing synchronized movements of the.
chamber, said means effecting movement of the 65 piston
and valve during the discharging of said
piston at an increasing rate of speed from the
chamber,
the piston being operated by a crank
beginning of its stroke until it reaches the mid
so as to move on its discharging stroke ?rst ‘at
point of its travel, and thereafter at a decreasing
rate of speed, and the port being initially opened ‘ an increasing velocity and thereafter at a de
part way by the valve prior to the initiation of 70 creasing velocity, and the valve opening increas
ing in area as the piston speed increases and de
the discharging stroke of the piston, and there
after fully opened, the valve reaching fully open
position at about the time that the piston is
travelling at its highest velocity.
creasing in area as the piston speed decreases. 7
CHARLES Z. MONROE.
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