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Патент USA US3065631

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Nov. 27, 1962
J. BOCHAN
3,065,522
BLEACH AGENT DISPENSER SYSTEM FOR WASHING MACHINES
Filed Aug. '7, 1961
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INVENTOR.
D'OHN BOG-HAN
BY www
Hls ATTORNEY»
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Nov. 27, 1962
J. BOCHAN
3,065,622
BLEACH AGENT DISPENSER SYSTEM FOR WASHING MACHINES
Filed Aug. 7, 1961
2 Sheets-Sheet 2
i
INVHVTOR.
‘716.2.
J'OHN BOCHAN
BY M #9 £401»?
ms ATTORNEY
3,0?5?22
Patented Nov. 27, 1962
2
tom, has within it means for washing clothes. The ma
chine is of the type wherein the agitation of the clothes
starts at the very beginning of the cycle during the in
troduction of water from supply means; this approach is
generally used in machines wherein the clothes agitation
is obtained by use of a perforated drum rotating within
3,065,622
BLEACH AGENT DISPENSER SY§TEM FUR
WAdl-HNG MACHINES
John Eochan, Louisville, Ky., assignor to General Electric
Company, a corporation of New York
Filed Aug. 7, 1961, Ser. No. 129,614‘
5 Claims. (Ci. 68-207)
the liquid receptacle on a non-vertical axis. The water
is supplied through a supply conduit which has an out
let positioned to discharge into the receptacle through
This invention relates to automatic clothes washing
machines, and more particularly to such machines where 10 the side opening, the flow of water to the supply conduit
being controlled by suitable inlet valve means.
it is intended that a liquid bleach be automatically added
In order to provide liquid bleaching agent at the right
to the washing liquid at the proper time in the washing
time, a bleach ?ll conduit is arranged with an open top
cycle.
end arranged to receive bleach, and with a bottom por
Automatic washing machines customarily proceed
tion connected to the bottom opening of the receptacle.
through a sequence of operations in order to wash, rinse
The bottom portion is further formed to contain su?icient
and dry the clothes. The sequence ordinarily includes
bleach for a washing operation below the level of the
a washing operation, one or more rinsing operations, and
second opening, that is, without having it overflow up
a ?nal extraction operation in which the rinse water is
into the receptacle. The side opening is connected to
removed from the clothes. Where the machine is of the
an intermediate part of the bleach ?ll conduit by a re
combination waher-dryer type, the extraction operation
circulation conduit, and the level of liquid reached in the
may then be followed by a heat drying operation. Of
receptacle during washing is suitably controlled so that
it reaches up adjacent but below the side opening.
course, depending upon the particular machine, variations
on the above basic sequence may be provided, but the
The side opening is so arranged that a substantial
general sequence of washing, rinsing and extracting is
used in almost all automatic washing machines.
25 amount of liquid can pass through the recirculation con—
As automatic washing machines have become more per
fected, they have automatically performed an increasing
duit from the receptacle into the bleach ?ll conduit when
the aforementioned liquid level is present and the agitat~
number of functions which previously had to be performed
ing means is operated so as to create turbulent move
manually.
ment of the water.
For instance, suitable dispensers for deter
However, this ?ow through the re
gents, water softeners, and fabric softeners may be pro
vided. In addition to these, it will readily occur that a
circulation conduit is prevented during the initial supply
suitable liquid bleach or bleaching agent is ‘among the
more important additives required by many operators
for a large part of their operations. An important point
as to the dispensing of liquid bleach into the washing
liquid is that, if the bleach is introdced into the liquid at
the very beginning of the cycle (that is, at about the same
a su?icient velocity head of Water entering the receptacle
through the side opening to prevent entrance of liquid
into the recirculation conduit from the receptacle. The
recirculation is necessary to introduce the major part of
the bleach from the bottom portion where it is contained
up into the receptacle, and because this recirculation
time as the detergent), the bleach has a tendency to
can start only as a result of the completion of the action
counteract the beneficial whitening effect which is pro
vided by many modern detergents in the form of a ?uo—
rescent or optical dye; when this occurs, the full optical
brightening effect of the detergent is not achieved. It
has been determined that, where clothes are being washed
during the introduction of the wash water, the optical
dye in the detergent can complete its action on the clothes
by the time all the needed wash water has entered, and
of the water introducing means, a delay is thereby pro~
vided before the introduction of any substantial part of
the bleach.
the bleach is then free to treat clothes without interfer
ing with this action. This result of this approach has
been shown in the laboratory to be visibly better than
where bleach and detergent are both introduced at the
beginning of the washing operation.
Thus, a highly desirable washing machine structure is
one wherein the bleach, although introduced into the ma
chine prior to the start of the washing cycle, is held in
readiness throughout the initial part of the washing oper
ation so that virtually all of it remains outside the basket
in which the clothes are being washer, and then contacts
the clothes.
It is consequently an object of my invention to provide
an improved washing machine wherein bleach dispensing
means are provided to dispense the bleach into contact
with the clothes in response to the shutting off of the inlet
supply of washing liquid.
A further more speci?c object of my invention is to
provide a bleach dispenser in which the bleach is con
tained in a recirculation system which is dependent for
operation upon the stopping of the inlet water, the re
circulation then causing the bleach to enter into contact
with the clothes.
In one aspect of my invention I provide a conventional 70
Washing machine of the type wherein a liquid receptacle,
with an opening in the side and an opening in the hot
of water because the supply means if formed to provide
The feature of the invention which are believed to be
novel are set forth with particularity in the appended
claims. The invention itself, however, both as to organ—
ization and as to method of operation, together with
further objects and advantages thereof, may best be under
stood by reference to the following description taken in
connection with the accompanying drawings.
In the drawings, FIGURE 1 is a side elevational view
of a washing machine incorporating my invention, par
tially in section and with certain surfaces broken away
to show details; and
FIGURE 2 is a rear view of the machine of FIGURE
1, with the rear panel removed and with certain surfaces
broken away to illustrate further details.
Referring now to both ?gures, I have shown my inven
tion in one form as applied to a domestic laundry ma
chine.
The operating elements of the machine are in
cluded within an outer cabinet structure 1 which is sup
ported on a base and toe board assembly 2. The cabinet
1 includes a top surface 3 on which is mounted by any
suitable means, such as for instance posts 4, a backsplash
portion 5 designed to contain the usual control mechanism
(not shown) for the machine. A suitable manually oper
ated member 6 may conventionally extend from back
splash portion 5 so that the operator may select and de
sired sequence of operations. Access to the interior of
the machine is provided by a door 7 which may be
mounted on the front panel 8 of cabinet 1 by concealed‘
hinges and opened by any suitable means (not shown).
conventionally, when a load of soiled clothes is placed
within the machine, the control mechanism is used to
aoeaese
3
cause the machine to proceed through an appropriate se
quence of operations. Typically, the sequence starts with
concurrent introduction "of water and tumbling of the
solenoid is energized. The hot and cold water valves
under the control of the solenoids 3t) and 31-discharge
clothes, the water being shut off at the appropriate level
into a funnel 33 positioned below the outlet of conduit
32. Funnel 33 leads into a downwardly extending supply
conduit 34 terminating at its lower end in an outlet 35
so that water flowing through the conduit 34 passes out
. and the tumbling continuing. Then the water is drained
to end the initial wash step, and one or more rinses and
through a common conduit 32 and a suitable air gap
drains are provided, followed ?nally by a damp drying
through outlet 35 and then, by virtue of its velocity head,
or liquid extraction operation.
through a side opening 36 formed in tub 10. It will
As shown in the ?gures, the machine is of the non
vertical axis type (more speci?cally, horizontal in the 10 readily be understood that conduit 34 may be so designed
that the velocity of the water coming out of outlet 35
present case) where a cylindrical clothes basket or
is su?icient to cause virtually all of it to pass through
drum 9 is mounted for rotation on a generally horizontal
the opening 36 into the tub 10.
axis within an outer enclosing tub structure 10 which,
A conventional pressure actuated sensing device 37 is
as will be more fully set forth below, serves as a liquid
provided in controlling relationship to both solenoids
receptacle. Preferably, for a purpose to be explained be
3t) and 31, it being understood that the circuitry for ef
low, the rotation of basket 9 is clockwise, as viewed in
fecting this control purpose is conventional and is not
FIGURE 2 and shown by the arrow therein. The basket
further described herein. Sensing device 37 is connected
9 has a cylindrical shell or outer wall 11 with perforations
to the interior of tub lit) by a suitable line 38 which con
12 formed therein. The basket is closed at its rear by
means of a suitable wall 13 (which may be of double 20 nects with the tub almost at the bottom thereof at 39‘ as
thickness, as shown, for structural strength), and has a
front wall (not shown), provided in the usual manner
with an excess or loading opening. The basket is rotatably
supported by a shaft 14 secured to rear wall 13 and
mounted in a suitable bearing 15 supported between
two spaced wall portions 16 and T7 of the tub l0. Tub
10 is conventionally provided in the front wall thereof
with an opening (not shown) which is arranged relative
to door 7 so that clothes may be placed into or removed
shown. By virtue of the air trapped in line 38, the device
37 is sensitive to increases in the liquid level within tub
10, and is so formed as to shut off the flow of water by
de-energizing solenoids 30 and 31 when the liquid reaches
up to a level which is below but adjacent opening 36.
In this connection, an appropriate level is shown by the
line A in FIGURE 2. It will be noted that, while the
level A is below the opening 36, rotation of basket 9 to
tumble clothes in the washer will cause a degree of
from the basket and so that the door seals the opening
during operation of the machine. Tub It) thus forms a
turbulence in the water which causes it to splash up in
container for liquid during the treatment of clothes,
and the basket 9 forms both a container for the clothes,
and, by virtue of inwardly extending vanes or ribs 18
true where, as in the present case, basket 9 rotates up
formed therein, a means of tumbling clothes within tub
10.
Referring now particularly to FIGURE 2, during the
operation of the machine the basket 9 is driven from an
electric motor 19. The drive from the motor to the basket
includes a pulley 24} which is secured to the motor shaft
substantial quantities into opening 36; this is particularly
toward opening 36. It will further be noted that, al
though this tubulence is occurring during ?lling of the
machine because of the basket rotation, the inlet velocity
of the water coming through opening 36 from outlet
35 of conduit 34 is su?icient to prevent any liquid from
passing out of tub 10 through opening 36. Thus, while
a substantial quantity of water can pass out of tub Ill
through opening 36 during regular tumbling rotation of
so as to rotate therewith and over which passes a belt 21.
basket 9 after the water has ?nished entering, substan
Belt 21 drives an adjustable sheave assembly 22 of the
type which is well known for use in achieving variable
output speeds from a constant input speed source. The
adjustable sheave assembly in turn operates a belt 23
to cause rotation of pulleys 24 and 25. The rotation
of pulley 25 is passed on through a belt 26 to a pulley
27 which is secured on the end of basket shaft 14. In
tially no water will splash out through opening 36 during
this manner, the motor 1? may be driven at a constant
speed, and through the adjustable sheave assembly 22,
the speed imparted to pulley 27 and basket 9/ may be
Vitiated water from washing operations is discharged
from the machine through an opening 40 formed at the
bottom of tub 10. A suitable conduit portion 41 leads
from opening 40 to the inlet of a pump 42 (FIGURE 1)
which may, as shown, be driven from the motor 19
through a clutch 43 controlled by a solenoid 44, the
solenoid operating in the conventional way so that when
energized it causes the clutch to connect the motor to the
For instance, for tumbling purposes
pump in driving relationship, and when the solenoid is
not energized the pump is not operated by the motor.
varied so as to provide an appropriate range of speeds
for the basket.
the ?lling operation.
during washing and rinsing operations, the basket may
Thus, when draining is desired after washing and rinsing
be rotated at a speed of approximately 47 rpm, while
a centrifuging speed of several hundred r.p.m. may be
sequently draws water through the conduit portion 41
provided to the basket for effecting centrifugal extraction
and passes it out through a conduit 45 to a suitable drain
of the liquid from the clothes subsequent to the com
(not shown).
operations, solenoid 44 is energized, and pump 42 con
In order to receive a suitable quantity of liquid bleach
pletion of the washing and rinsing operations.
The operation of the variable speed drive brie?y 60 to be used during a washing operation, I provide a bleach
?ll conduit 46 which may, for convenience, be provided
with .an enlarged upper end 47' having an opening 48 and
a spout 49 accessible to an operator at the front of the
tially complete description of an operative machine. A
machine. It is intended that the operator pour through
complete detailed description of such a drive is provided,
spout 49 a quantity of bleach which is desired to be
for instance, in Patent 2,950,613 issued to me on August
introduced for the washing operation to follow. The
30, 1960, and assigned to the General Electric Company,
bleach thus introduced ?ows down a vertical portion 50
assignee of the present invention.
of the conduit 46 and then enters the conduit portion 41
Means whereby water is admitted to tub 19 during
which in effect forms the lower part of the conduit
washing and rinsing operations of the machine include
connections 28 and 29 through which hot and cold Water 70 46. The conduit portion 41 has su?icient internal volume
so that it is capable of containing any amount of liquid
is supplied from a suitable source to the machine for the
bleach which will normally be introduced in connection
washing and rinsing operations. A valve controlled by
with a single washing operation without having the
a solenoid 30 permits passage of hot water when the
bleach rise up to the level of the opening 40.
solenoid is energized, and a valve controlled by an op
posed solenoid 31 permits passage of cold water when the 75
Intermediate its ends, the vertical portion 50 of con
described above does not form any part of the present
invention, and is merely set forth is provide a substan
3,065,622
6
duit 46 is connected to the opening 36 by a recirculation
conduit 51 which is preferably formed as shown so
that it slopes downwardly from opening 36 to its junction
with bleach ?ll conduit section 50. Supply conduit 34
is formed entering the portion 52 of conduit 51 so that
the discharge of water into the tub 10‘ actually passes
through a small part of the recirculation conduit and
then through opening 36 into the tub.
As the liquid level in tube 10 rises during introduction
of Water, the rotation of basket 9 causes splashing of 10
the water, and some of the water will tend to splash
through opening 36, as mentioned above, but the velocity
head of the supply water prevents this. As a result, no
water passes from opening 36 through the recirculation
scribed what at present is considered to be the preferred
embodiment of my invention, it will be obvious to those
skilled in the art that various changes and modi?cations
may be made therein without departing from the inven
tion, and I therefore aim in the appended claims to cover
all such changes and modi?cations as fall Within the true
spirit and scope of my invention.
What I claim as new and desrie to secure by Letters
Patent of the United States is:
1. In a washing machine: a liquid receptacle having
?rst and second openings formed respectively in the side
and bottom thereof; means for agitating clothes in said
receptacle; means for supplying water to said receptacle
including a supply conduit having an outlet positioned to
conduit to the bleach ?ll conduit during ?lling. Inasmuch 15 discharge into said receptacle through said ?rst opening,
and inlet valve means controlling the passage of Water into
as the bleach is in the bottom portion 41 of bleach ?ll
said ‘supply conduit; a bleach ?ll conduit having an open
conduit 46, the introduction of Water into tub 10 tends to
top end arranged to receive bleach and a bottom portion
keep the bleach down where it is and, while a very small
connected with said second opening, said bottom por
amount of bleach may escape into the tub 10 and mix
tion being formed to contain bleach for a Washing oper
with the water during the ?ll operation, it will be so little
ation below the level of said second opening; a recircu
as not to affect adversely the operation of the optical dye
lation conduit connecting said ?rst opening to said bleach
present in most detergents. In other words, if a de
?ll conduit intermediate the ends thereof; liquid level con
tergent has been introduced prior to this part of the oper
trol means arranged to shut said valve means when the
ation, by the time the ?lling operation terminates the
liquid in said receptacle rises to a level below and adjacent
optical dye will have had time to take effect.
As soon as the ?ll operation terminates as a result of
said ?rst opening; said side opening being arranged to
permit a substantial amount of liquid to pass through said
the de-energization of solenoids 30 and 31 by control 37
recirculation conduit into said bleach ?ll conduit when
when level A is reached, the substantial turbulence and
the liquid level controlled by said level control means is
splashing which has been previously mentioned will cause
a substantial quantity of water to pass through opening 30 present and said agitating means is operating; said supply
means being formed to provide a sufficient velocity head
36. This water then passes down recirculation conduit
of water entering said ?rst opening to prevent entrance of
52 into bleach ?ll conduit 46; as more and more of this
liquid into said recirculation conduit from said receptacle
water accumulates in conduit 46, it tends to move the
when water is entering from said supply conduit.
bleach from its location within portion 41 of the bleach
2. The apparatus de?ned in claim 1 wherein said means
?ll conduit up through opening 40 and into the tub where 35
for agitating clothes comprises a substantially cylindri
the tumbling action of basket 9 will cause thorough mix
cal basket member having a perforated outer Wall
ing. In other words, the cooperative action of the
mounted for rotation within said receptacle on a substan
turbulence of the Water in tub 10 and the velocity head
tially non-vertical axis.
of the water being introduced from the supply source are
3. The apparatus de?ned in claim 1 wherein said re
utilized to prevent any force tending to introduce bleach
circulation conduit slopes downwardly from said ?rst
during introduction of supply water, and to provide a
opening to its junction with said bleach ?ll conduit.
force tending to introduce the bleach. Thereafter, as a
4. The apparatus de?ned in claim 2 wherein said
result, the bleach is introduced in response to the attain—
means for agitating clothes further comprises drive means
ment of liquid level A and the desired bleaching action
is obtained, suitable time having been provided for the 45 for rotating said basket so that its outer wall moves up
optical dying effect to take place.
wardly when passing by said ?rst opening.
5. The apparatus de?ned in claim 1 including drain
means for draining said receptacle, said drain means also
being connected to said second opening, and means for
noid 44 is energized to connect pump 42 to motor 19' so
that the pump draws liquid through opening 40 and con 50 controlling operation of said drain means.
duit 41 to its inlet, and then passes the liquid out through
References Qiteti in the ?le of this patent
conduit 45 to drain.
UNITED STATES PATENTS
It will thus be seen that my invention provides a struc
ture responsive to the completion of the water introducing
529,539
Welden _____________ __ Nov. 20, 1894
It will be understood that at the end of the washing
operation, as provided for a ‘suitable period of time, sole
operation to introduce the bleach, the bleach being held 5
substantially separate until this occurs. It will further be
observed that this result is achieved without the need for
mechanically timed introduction of the bleach.
While in accordance with the patent statutes I have de
750,185
Grace _______________ __ Ian. 19, 1905
213
Great Britain _______________ __ of 1910
970,610
France ______________ __ June 21, 1950
FOREIGN PATENTS
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