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Патент USA US3043135

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July 10, 1962
s. v. HORECKY
3,043,125
CLOTHES WASHING MACHINE
Filed Feb. 29, 1960
4 Sheets-Sheet 1
‘FIG. 1
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INVENTOR.
Stanley VHorec/ry
'
BY
A/W
4
Any
July 10, 1962
s. v. HORECKY
3,043,125
CLOTHES WASHING MACHINE
Filed Feb. 29, 1960
4
4 Sheets—Sheet 4
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UPPER
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LUWER
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sP/A/ MOI 5T
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LUWER
sP/W MUT RUW
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UPPER
RUvsE WATER
06
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LOWER
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WA$R WATER
WATER TRAWsEER
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RIIIJZECENTOR.
Stanley VHorecky
BY
M A L/W
A”?
United States Patent 0 ’ ice
1
3,043,125
Patented July 10, "1962
'2
3,043,125
by ironing. It is seen, therefore, that a centrifuging op
eration to attain a proper “damp-dry” condition is sub
jecLto many variables, and a ?xed time period for the
extraction operation can be only a compromise, at best.
21 Claims. (CI. 68-12)
a control circuit for washing‘: machines of the automatic
time-cycle type in which means responsive to the large
CLOTHES WASHING MACHINE
Stanley V. Horecky, Villa Park, 11]., assignor to General
Electric Company, a corporation of New York
Filed Feb. 29, 1960, Ser. No. 11,708
It is, therefore, an object ‘of the invention to provide
volume of water extracted at the commencement of a
This invention relates to Clothes washing machines of
centrifuging operation will inactivate the time-cycle switch
the time-cycle controlled type, and in particular, to means
for interrupting the operation of the timing means at 10 until there is a very substantial reduction in the amount
of water being extracted, ‘whereupon the time-cycle switch
the start of a particular operation and for restarting the
will resume operation to continue the centrifuging step for
timing means upon the attainment of a predetermined op
a short, ?xed period.
erational condition.
It is another object of the invention to provide an
Clothes washing machines of ‘the domestic automatic
type are under the control of a time-cycle mechanism 15 automatic control of the extraction cycles of an auto
matic washing machine, pursuant to‘ which the washing
which by way of a group of cams rotated at a predeter
machine operates more efficiently to extract liquid from
mined rate to open or close switches in an established
the clothes.
\
sequence, establishes various electric circuits to operate
In practicing the invention, I rely upon the circum
the machine in a predetermined cycle of operations which
include, among other things, a washing operation, a 20 stance that during the very ?rst stages of operation of
centrifugal extraction operation to remove washing liquid
from the clothes, a rinsing operation, and a centrifugal
extraction operation to remove the rinse water from the
clothes. In such washing machines, the washing and
a washing machine during a centrifuging cycle, large
volumes of free liquid in the tub are thrown out of the
tub and into a collection chamber surrounding the
tub, long before the tub reaches the ?nal centrifuging
centrifugal extraction operations are carried out in a single 25 speed. For example, it has been found that in the aver
age size vertical axis washing machine in which the tub
tub or basket. In some vertical axis machines, the wash
contains about sixteen gallons of water, a very large por
ing is e?ected by oscillating the tub, and in others, by
tion of this water leaves the tub and gathers in the col
the oscillation or reciprocation of an agitator or impeller.
lection chamber within about twenty-?ve seconds after
Extraction‘is accomplished by rapidly spinning the tub,
whereby the free water and that contained in the clothes 30 the tub begins to rotate. In this time, the tub may have
come to only about 100 r.p.m. whereas the ?nal extrac
passes over the top of the tub or through ports in the side
tion speed may be as high as 550 r.p.m.; nevertheless, the
of the tub. The extraction liquid is collected in a chamber
free water within the tub has been removed from the
from which it is usually removed by a pump operating
tub and the remaining extraction operation is intended
continuously during the extraction cycle. In horizontal
to remove the water from the fabrics themselves.
axis machines, the clothes are tumbled about in a detergent 35
Domestic washing machines ordinarily extract to the de
gree that at the end of the extraction operation, the
moisture content of the clothes is about 100% of the
weight of the clothes. For example, considering an eight
escape through the openings in the wall of the drum. In
pound clothes load, the centrifuging operation will ex
this case also, the extracted water is caught in a collec 40
tract all but about eight pounds of water from the clothes.
tion chamber and is continuously pumped therefrom.
Additional
spinning, except at very high speeds, is not
It is usually possible for the user to preselect the wash
productive
of
a substantial further reduction in the amount
ing time according to whether the clothes load is heavy
of water remaining in the clothes.v It has previously been
. or light or more or less soiled. A load of heavily soiled
45 noted that during an extraction operation, a discharge
work clothes, for example, may require as much as a
solution partially ?lling the tumbling drum, and extrac
tion is accomplished by rapidly spinning the drum which
ordinarily is perforated, thus permitting the liquid to
ten minute washing operation; whereas light fabric, lightly
soiled articles may be adequately washed in as little as
pump is continuously operating. ‘These discharge pumps
are small, having a pumping capacity of about ?ve gallons
per minute, and are, therefore, incapable of handling the
three minutes. In spite of this wash time selection, the
remaining operations of the machine are conducted 50 ?ood of water leaving the tub at the commencement of
the spinning operation. The water, therefore, accumu
pursuant to an in?exible schedule. It can take at least
lates in the collection chamber.‘
seven minutes, for example, to remove the desired amount
A presently preferred embodiment of my invention
of washing or rinsing liquid from a heavy load of clothes
utilizes a pressure-responsive switch to terminate the ?ll
by centrifugal extraction; even longer to extract water
ing of the tub and initiate the washing operation. The
from shag rugs and the like which have a very high water 55
?ll valve remains open until over?ow from the tub into
absorbency factor; and as little as three minutes for
the collection chamber has submerged the switch in about
the centrifugal extraction of water from light clothes,
two inches of water, whereupon the switch operates to
particularly when they are made of synthetic fabrics. It
terminate the water ?lling operation and establish an
will thus be seen that the in?exibility of the extraction
operations ‘pursuant to conventional practice has serious 60 electric circuit which energizes the main drive motor to
initiate the washing operation. I have adapted this
disadvantages. Articles may not be spun long enough
pressure-responsive switch to carry out the objects of my
to extract all of the water from very heavy articles and,
invention, by adding an electric circuit which interrupts
of course, the extraction operation will be too long for
the timer-motor circuit after centrifugal extraction has
the light synthetic fabric articles. The inadequate ex
continued for a time su?icient to submerge the switch in
traction time for the very heavy articles may result in
a carryover of washing liquid into the subsequent rinsing 65 slightly more than two inches of water. This will be very
shortly after an extraction cycle begins. Because the
cycle and may extract so little water at the end of the
pressure switch interrupts the circuit for the timer motor,
rinsing operation that the articles will literally be dripping
the cam-controlled switches remain as they were at the
wet when removed from the machine. With respect to
the light synthetic articles, it is well known that ab 70 commencement of the operational cycle. One of these
switches, of course, had been closed to initiate the cen
normally long spinning times may set wrinkles in the
trifuging operation and it is apparent, therefore, that so
fabric so securely that they are di?icult to remove even
3,043,125
3
r
long as su?icient water is leaving the tub to retain the
4
one direction of operation, as is well known in the art.
The tub itself is mounted on a tubular shaft 16 which
also communicatesv with the transmission 7 and is ar
pressure switch in its timer-motor disabling position, the
centrifuging Operation will continue, and the discharge
pump will continue to operate, Sooner or later, depend
ranged to be rotated thereby during rotation of the motor
ing upon the type of fabricv and the \‘clothes load in the 5 in the opposite direction, also as well known in the art.
washing machine, the pumping rate“; of the discharge
The transmission, the exact drive mechanism, and the
pump will exceed the rate at which water is entering the
means for rotatably supporting the tub may be in all re
spects conventional and details thereof have been omitted
will recede until it is below that necessary to maintain
for brevity, for they form no part of the present invention.
the switch in its said position. The control circuit there 10
It will be noted that the tub 12 is upwardly and out
upon operatesito reinstate the operation of the timer
wardly ?ared and that at substantially the maximum
motor. To insure the continuance of the centrifuging
diameter it has a plurality of water ejection holes 17
operation for an‘additional time calculated to etfect the
arranged in a single row. The tub has a heavy balance
complete removal of water from the clothes, the time
ring 18 secured to its upper rim to help stabilize the tub
switch maintains the spin operational condition for an 15 during the rapid rotation thereof in an extraction cycle.
' additional predetermined period which may be two min
The upper part of the housing is enclosed by the cover
utes, whereupon the washing machine proceeds to its
structure 19 which is provided with a raisable lid 20
next operation or terminates its operation according to
a?ording access to the tub by way of the depending rub
whether the centrifuging was for the removal of wash
ber sleeve 21 which serves to prevent small articles of
20 clothing from. being carried over the top of the tub dur
water or rinse water from the fabrics.
ing a washing or centrifuging operation. Said sleeve 21
In other embodiments of the invention presently de
scribed, I employ apair of probes or spaced electrodes
may be arranged pursuant to US. Patent 2,703,974
in the path of escape of water from the tub.," Water im
granted on March 15, 1955 to Kendall Clark for ?exible
pinging upon said probes completes a circuit thereacross
guard sleeve, etc., and assigned to my present assignee.
and by suitable means I translate this circuit operation 25 The rear portion of the cover structure 19' provides a
collection chamber and the‘ level of water in the chamber
into control over the timer motor.
space for the accommodation of a conventional solenoid
In still another em
controlled water valve 22 having inlets 23 ‘and 23.1 ar
bodiment, I catch the water as ityescapes from the tub
ranged respectively to be connected to the hot and the
and utilize the weight of the water to overbalance a tilt
cold water supply piping (not shown). The valve has
ing switch operator which controls the timer motor, as
30 an outlet 24 to which is attached a ?tting 25 and out?ow
aforesaid.
terminal 26 which discharges water against the outer
Other features and advantages will be apparent from
wall of sleeve 21, whence it ?ows into the tub 12, as
the following detailed description of three embodiments
fully explained in the Clark patent. A backsplash mem
of the invention, read in connection with the accompany
ing drawings in which:
ber 27, mounted on the top structure, houses a conven
FIG. 1 is a side sectional elevation of a clothes wash 35 tional time-cycle controller 28 having a setting knob 29
mounted on the front of the backsplasher for ready ac
ing machine embodying one form of the present invention;
cessibility.
FIG. 2 is a circuit diagram of the control system em
A pressure sensitive switch 30 is mounted in the bulk
head 2. Said switch, as shown in FIGS. 1 and 8, has a
ing machine illustrating a second embodiment of the 40 mounting 31 which supports a ?exible rubber diaphragm
32 within the collection chamber 3, and a switch housing
timer control actuator;
._
33 disposed externally of the chamber 3. A plunger 34
FIG. 4 is an elevational view of the device of FIG. 3,
(FIG. _8) having a large diameter head 35 in engagement
looking in the direction of the arrows 4—4 of FIG. 3;
with the underside of the diaphragm 32 cooperates with
FIG. 5 is a circuit diagram for the control system of
45 the pivotally mounted lever 36 and the switch actuator
the FIG. 3 embodiment;
37 to operate the single pole, double throw switch within
FIG. 6 is a fragmentary side sectional elevation of a
the housing. The switch blade 38 is biased by the leaf
third embodiment of the time control actuator;
spring 38.1 and the illustrated overthrow mechanism to
FIG. 7 is a schematic circuit diagram for the FIG. 6
close against a lower contact 39 when there is less than
embodiment;
FIG. 8 is a sectional elevation of the water pressure 50 two inches of water depth in the collection chamber.
When there is more than this depth, the downward move
switch actuator, looking in the direction of the arrows
ployed in the FIG. 1 embodiment;
FIG. 3 is a fragmentary sectional elevation of a wash
8-8 of FIG. 1;
ment of plunger 34 causes lever 35 to move away from
FIG. 9 is. a sectional elevation of the switch element
of FIG. 8, looking in the direction of the arrows 9—9
cause the switch blade 38 to close with the upper con
actuator 39, whereupon the overthrow mechanism will
tact 40. An adjustment spring 41 is available to adjust the
bias of the operating plunger. In the present embodi
of FIG. 8; and
FIG. 10 is a cycle timing diagram for the control cir
cuits of the present invention.
ment of the invention, the pressure switch 30 controls the
operation of the time-cycle controller-28 during the centri
fuging operations, as later explained. Further, by way
of preliminary explanation, it is noted that the main drive
belt 42, by means of which the transmission is driven by
the motor 6, also engages, the pump drive pulley 43,
A typical automatic washing machine with which the
present invention is very advantageous comprises, as
shown in FIG. 1, an outer casing 1 having a water-tight
bulkhead 2 which divides the casing into a water collec
tion chamber 3, and a machinery compartment 4. Suit
whereby the pump is in operation whenever the motor 6
is operating. The pump 8 is of a well-known bi-direc
tional type and operates at full pumping e?iciency re
gardless of the direction of operation of the motor. In a
ably supported within the machinery compartment, as by ‘
the supporting structure 5 are a main drive motor 6, a.
transmission 7, and a pump 8. The inlet 10 to the pump
communicates with an inlet ?tting (not shown) in the
bulkhead 2 and the discharge hose 11 is arranged to con-.
washing machine presently manufactured by applicant’s
assignee herein, the pump has a pumping capacity of the
duct ef?uent to a suitable discharge point, such as the
usual laundry tub (not shown).
A washing tub 12 isdisposed within the water collec
tion chamber 3. A bladed agitator 14 is disposed within
said tub. Said agitator is ?xed to the end of an agitator
shaft 15 which is connected to the transmission 7 for,
order of ?ve gallons per minute.
70
/
In using a washing machine of this type, the clothes
are placed within the tub, detergent is added, and then
operation of the time-cycle switch is initiated by rotating
or otherwise manipulating the control knob 29 to an "on”
position which, as later explained, starts the timer motor
oscillation thereby during operation of the motor 6 in 75 and energizes the solenoid operated valve to admit water
3,043,125
5
into the tub by way of the ?tting 26. In passing, it should
be noted that the washing machine of the type illustrated
has both hot and cold water solenoids and selection devices
whereby the'user may select the temperature of the water
to be used (for the washing and rinsing operations. For
simpli?cation of the present description of operation, it
will be assumed that the user has elected to wash and
6
washing machine and preselects the duration of the wash
ing operation. The cam shaft shown carries six cams,
C1, C2, C3, C4, C6 and C7. Cam C1 is a three level
cam with an armature spring or contactor 50 which can
be closed to its upper stationary spring contact 51, to its
lower contact 52, or may assume an intermediate open
position. Cam C2 is a two level cam with an armature
spring contact 53 which may open or close relative to
rinse with hot water only; and the circuit diagrams herein
lower stationary contact 54. Cam C3 is also a three level
show only a hot water valve solenoid. The ?lling pro
seeds until water/over?ows into the water collection 10 cam with its contact armature 55 movable between upper
contact 56 and lower contact 57 from an intermediate
chamber through/the, ports 17 and continues to ?ow until
open position. Cam C4 is also a three level cam with
there is a two inch depth in the chamber, whereupon the
a contact armature 58 capable of being closed to upper
resulting head of water on the diaphragm of the pressure
contact 59, lower contact 60, or intermediately open
switch operates the switch to open "the solenoid valve
circuit and to close the drive motor circuit. The motor 15 therebetween. Cam C7 is a three level cam with a contact
armature 61 which may be closed to upper contact 62,
operates in a direction driving the transmission 7 in the
agitation cycle, whereupon the transmission oscillates
to lower contact 63 or may assume an intermediate open
position. The last of these cams C6 is also a three level
the shaft on which the agitator is mounted. The pump
cam with its contact armature 64 which may be closed to
is operating at this time, also, and because there is no
more water entering the chamber 3 (except for that 20 either the lower contact 65, the uper contact 66, or inter
which splashes through the opening 17) the chamber is
evacuated of water. The washing operation proceeds for
the predetermined time following which the timer halts
mediately open.
The time cycle control further includes a line switch
67 which responds to the depression of the external knob
29 in a downward direction with respect to FIG. 2. This
the motor and reverses it to cause the motor -to spin the
tub. Because of the load of water and clothes, there will 25 depression and the consequent axial movement of shaft
28.2 closes the line switch armature contact 68 to station
be as much as eighteen gallons of water and eight
ary contact 69 and the switch remains closed throughout
pounds of clothes in the tub, and further because the
motor is usually connected to the transmission by a cen
trifugal type clutch, the tub 12 picks up speed gradually.
the operational cycle.
More speci?cally, the operation of the control circuit
In a matter of seconds, however, the tub will be rotating 30 of FIG. 2 when viewed in conjunction with the cam
closure diagram FIG. 10 is as follows: the manual control
at from 80 to 100 r.-p.m. which produces su?‘icient cen
knob 29, as mentioned, is depressed axially to close line
trifugal forces to cause the free water in the tub to spill
switch 67 and further is rotated to the rotary start posi
through the holes 17 in amounts much greater than the
tion. When the cam shaft is in the start position, cam C2
pump can handle, whereupon in from twenty-?ve to thirty
seconds following the commencement of the spin opera- . - closes its contact armature 53 to the lower stationary
contact 54. This closure completes a circuit to the
tion,,water will have accumulated in the bulkhead almost
to the bottom of the spinning tub and the head of water
timer motor 28.1. The circuit to timer motor 28.1 may be
actuates the pressure switch to break its lower contact
traced from a conventional source of 60 cycle, single
and make its upper contact. As presently explained, this
phase, alternating current (not shown) through lead con
action interrupts the timer circuit halting the usual step 40 ductor L2, contacts 68, 69, 54, 53, lower contact 39 of
by-step advance of the timer cams, but maintains the
the pressure switch, switch blade 38, and the timer motor
drive motor 6 in operation. The tub continues to spin
28.1 to conductor lead L1 of the current source.
and, depending upon the nature of. the clothes load, its
The timer motor then proceeds to rotate cam shaft
water absorbency, etc., the pump shortly becomes increas
28.2 for a time controlled start period, at the conclusion
ingly able to handle the volume of water being extracted 45 of which cams C1, C3 and C4 close their contact arma
and commences to reduce the level of water in the tub to
below that which is necessary to sustain the open circuit
ture to the upper stationary contacts and cams C6 and
C7 close their armatures to their lower contacts, and cam
C2 returns to open circuit position, as indicated in FIG.
10. This multiple cam operation serves to initiate the
condition of the timer motor, and the timer againbegins
operation. At this time, there is probably only a light
spray issuing through the port 17. The timer continues 50 wash ?ll period. The previously described original cir
the centrifugal extraction operation for an additional ?xed
cuit path to the timer motor is opened by the restoration
duration; for example, two minutes, whereupon the timer
of cam C2. Cams C6 and C7 on closure complete an
re-establishes the control circuit for the next operation
operating path to the water solenoid 22.1. This operating
which is usually that of again ?lling the tub to over?ow
path may be traced from the current source and con
for an agitated rinse operation. The remaining washing 55 ductor lead L1 through solenoid 22.1, contacts 65, 64,
machine operations are substantial repetitions of the
motor centrifugal switch contacts M3, M2, contacts 40,
above, terminating in a ?nal rinse and a ?nal rinse water
63, 61, 69 and 68 to conductor lead L2 and the current
spinout. It will thus be seen that the interruption of the
source. Solenoid 22.1 is thereby energized and introduces
timer circuit followed by the brief additional centrifugal
water into the tub through the water inlet ?ttings. The
extraction operation not only insures removal of water 60 water introduced ?lls the tub 12 to the level of the water
from the clothes within the limits of the centrifuging speed,
ejection holes 17, at which time the water over?ows into
but insures a complete emptying of the water collection
the collection chamber 3. The water level in the collec
chamber.
.
tion chamber continues to rise until the predetermined
The circuit diagram of FIG. 2 illustrates the control
level which we have set as 2" is reached. At this level
circuitry necessary for the cycle of operation of a machine 65 diaphram 32 is depressed causing the pressure switch 30
utilizing the preferred embodiment. In this ?gure, the
time cycle controller switch 28 is shown provided with a
synchronous timer motor 28.1 which through generallyv
known transmission mechanisms, (not shown) rotates an
to move its switch blade 38 from contact 39 to contact 40.
This movement in turn closes circuits to the main drive
motor and the timer motor. The main drive motor is
started by the simultaneous energization of its start wind
output cam shaft 28.2 in a ,step-b’y-step manner at the 70 ing and its run winding. The energization path for the
rate of 6° each minute. By?'the use of the transmission
motor start winding may be traced from the power source
mechanism the cam shaft, 28.2 in addition to its rotational
and conductor lead L1 through contacts 56, 55, motor
direction may be displaced axially by manually pushing
terminal M82, motor start winding MS, terminal MSl,
or pulling on the timer knob 29 by means of which the
user operates the timer to start the operation of the 75 motor start winding centrifugal switch contacts 70 and 71,
3,043,125
7
contacts50, 51, 58, 59, 38, 40, 63, 61, 69 and 68 to con
ductor lead L2 and the power source. The circuit to the
motor run winding extends from the current source and
conductor lead L1, through motor run terminal MR2,
motor run winding MR, motor terminal MR1, contacts
58, 59, 38, 40, 63, 61, 69, 68 and conductor lead L2
back to the power source.
The motor then begins its
rotation in the clockwise direction for agitation.
As
8
tion. The motor run winding is energized over a path
from the power source conductor lead L1 through termi
nal MR2, drive motor run winding MR, terminal MR1,
contacts 58, 60, 69, and 68 to conductor lead L2 and
the power source. The motor begins to accelerate in its
.spin direction and after the motor has approached its
synchronous speed, centrifugally actuated contacts 70
and 71 open the circuit to the start winding and centrifu
mentioned also, the timer motor 28.1 is operated over a
gal armature contactor M2 closes to stationary contact
' path which will be called herein the alternate operate 10 M1. Shortly thereafter, cam C7 restores opening the
path and which may -be traced as follows: current source
lead L1, timer motor 28.1, contact blade 38, contacts
40, 63, 61, 69, 68 and conductor lead L2 back to the power
source.
The timer motor thereby rotates its cam shaft
28.2 at the preset rate timing the agitate period.
At this time, the motor has been started in its agitate
direction and thereafter accelerates under the control of
both its windings until its synchonous speed is approached.
As this speed is being approached, the start winding cen
trifugal switch operates. This centrifugal switch may be
of the generally known ?y-ball governed type which
actuates its contacts when the motor has accelerated to a
predetermined level. The actuation of the switch causes
armature contact 70 to break away from contact 71
alternate operate path to the timer motor during the re
mainder of the extraction period.
The drive motor 6 continues to accelerate to its run
ning speed, thereby rotating wash tub 12 and pump 8.
Wash tub 12 approaches its centrifuging speed at which
time water is ejected from the tub through the water
ejection holes 17. This water ejection begins at a high
?ow rate due to the large amount of free water in the
tub. This ?ow rate initially is considerably'egreater than
the pump capacity and as a result the ejected water ac
cumulates in the water collection chamber until the ac
cumulation reaches the 2" level. When this level is
reached, the pressure switch actuates its contact blade 38
against stationary contact 40. This actuation opens the
opening the motor start circuit. The motor start wind 25 original path and at this time the alternate path through
ing is thus de-energized and the motor continues to
cam C7 is not available. The timer motor operate path
rotate under the control of its run winding, and the motor
to timer motor 28.1 is thereby de-energized, suspending
by way of transmission 7 agitates the agitator in the
the control of the timer over the duration of the extrac
known fashion.
tion cycle. The cycle length is thereaftergoverned by
A second armature contact M2 is also actuated by the 30 the action of the pressure switch 30. Thus, as long as
acceleration of the main drive motor and on actuation
2" of water remain in the collection chamber above the
breaks its previously closed path to M3, opening the water
pressure switch, the timer remains inactive. During this
solenoid energizing circuit. Armature M2 then closes a
period, cam C6 may close its armature to its upper con
circuit to stationary contact M1 which in effect shorts
tact 66 for a short period to provide a ?ow of clean water
out the pressure switch 30. By this circuit closure, the
into the tub to ?ush out any sediment or lint. This
timer motor is locked operated for the duration of the
added water is also ejected and does not substantially in
main drive motor agitation period. This lock path is
crease the cycle length.
necessary since the liquid in the collection chamber may
Throughout this spin period, the pump 8 has been ex
be expelled sufficiently, during the agitate cycle to allow
pelling
the wash water from the outer collection chamber
switch 30 to restore, thus closing armature 38 to contact 40 at its maximum rate. As described previously, this maxi
39 opening the circuit which has been described as the
mum pumping rate is not sufficient to reduce the water
timer motor alternate operate path. This locking path
extends from conductor L2 through closed contacts 68
and 69, closed contacts 61 and 63 of cam C7, contact 40,
and closed contacts M2 and M1 to the timer motor 28.1
and lead L1.
-
During the agitate cycle, the time cycle controller 28
level in the collection chamber as long as the water is
being extracted from the tub at a high rate. However,
as the level of free water in the tub decreases, the amount
of water being extracted from the tub also decreases.
The pump then can begin to expel water stored in the
chamber and consequently the pump action begins to de
crease the water level in the collection chamber. As
the water level in the chamber decreases below the '2"
level necessary to keep open the contacts 38 and 40 of
switch 30, the switch returns to its normal position clos
ing blade contact 38 to contact 39. This closure com
has continued its rotation of cam shaft 28.2 and, at the
conclusion of the timed agitate period, cam C2 recloses
its contact pair of cams C3, C4, and C6 open their pre
viously closed contacts de-energizing the main drive motor
6. In view of the fact that armature M2 breaks with
contact M1 and recloses with contact M3, and the pressure
pletes the original operate path to thetimer motor which
switch contacts 38 and 39 are closed, timer motor 28.1 a ,BI then resumes its timed rotational control of the cycle
operates by way of the closed circuit at cam C2 as pre
length. The control timer 28 continues its timed control.
viously described.
of the spin extraction .for a ?xed time period with no
At this time the tub is full of water which must be
changes in cam closure. This time period which may be
removed from the machine prior to the beginning of the
of one, two or three minutes duration is preset by the
rinse cycle. In order to accomplish this extraction re 60 cam design and must be chosen to allow su?icient time
moval, the main drive motor must be closed in its spin
or centrifuging direction. To thus energize the motor, the
timer-operated cams C1, C3, C4, and C7 close their arma
ture contacts to their lower stationary contacts. These
closures complete paths to both the drive motor start
and run windings. The motor start path may be traced
from the power source and conductor lead L1 through
contacts 52, 50, 71, 70, terminal MSl, motor start wind
for the pump to dispose of the remaining water in the
collection chamber. At the conclusion of this timed
extraction period, which we have assumed to be two
minutes, cams C1, C3 and C4 all restore to their inter
mediate position de-energizing the main drive motor 6.
The circuit to the timer motor remains closed and the
ing MS, terminal MS2, contacts 55, 57, 58, 60, 69, 68
C6 and C7 close their armature contacts to their upper
timer continues its time control functioning. .
After the ?nal timed portion of the spin cvcle, cams
and conductor L2. It should be noted that the direction 70 contacts to start the rinse ?ll period. This dual closure
of energization of the start winding is opposite the direc
completes an energizing path for the water solenoid as
tion which was employed for energizing the start winding
follows: line conductor L1, water solenoid 22.1. contacts
during the agitation cycle. This opposite direction of
energization will allow the motor to rotate in the counter
66, 64, 62, 61, 69, 68 and line conductor L2. Energiza
tion of the solenoid causes water to ?ow into the tub
clockwise direction necessary for the centrifuging opera 75 as in the prior cycle. After a timed rinse ?ll period
3,043,125
somewhat shorter than that required to ‘completely ?ll
the tub, cams C1, C3 and C4 close their armature con
tacts to their upper stationary contacts to prepare the
main drive motor circuits in the agitate direction over
the previously described agitate paths. Cam C7 switches
its armature from its upper to its lower contact to close
10
identical in the main to that of FIG. 2 except that in
FIG. 5 there is employed a conventional single pole pres
sure switch 30' which includes an armature contactpr 38’
and a stationary contactor 39'. Switch 30' is used only
for the ?ll control operation in the manner previously
described for the prior embodiment. The duration of
the extraction cycle in this second embodiment is con
a preparatory circuit for the main drive motor operation
trolled by the electronic signal ampli?cation circuit desig
and further to place the water solenoid 22.1 under the
nated 100. This electronic circuit includes a cold cathode
control of pressure switch 30. Also, at this time, cam
tube 101 with its cathode 103, grid 104 and anode 105.
10
C2 restores to its open position opening the original oper
An electro-magnetic relay 106 is positioned across the
ate path to the timer motor 28.1. The water solenoid
tube output circuit. The electro-magnetic relay 106 has
remains energized causing water to flow into the tub as
an armature contact R1 and stationary contact R2 to pro
in the previously described ?ll operation. The tub then
over?ows into the collection chamber and ?nally the
vide a normally closed operating path from armature
cling. The main drive motor 6 is also energized in its
agitate direction over the previously described paths and
is electrically positioned between electrode 80 and the
grid 104. A second bias resistor 108 is also provided
When the timer has rotated to the position indicating
releasing of the relay due to the possible intermittent
striking of the electrodes by the water ejected, a capacitor
109 is connected'across the relay terminals. The capaci
switch 30 is actuated to reoperate the timer motor over 15 53 of timer cam C2 to the timer motor. The electronic
circuit 100 further includes a grid bias resistor 107 which
the previously described path to continue the timed cy
and appears in the form of a potentiometer, the slider
on acceleration opens the water ?ll solenoid circuit at
of
which is located in the electrical circuit from the elec
20
contacts M2.—M3. The drive motor proceeds to oscillate
trode 81 to the cathode 103. To guard against the false
the agitator through the rinse cycle.
_
the termination of the rinse agitation period cam C2 re
operates, reclosing its armature 53 to stationary contact
54 closing the original timer operate path. At this time 25 tor will make the relay action a little more sluggish re
sulting in a slow acting relay which will hold operated
cams C1, C3 and C4 restore their armature contacts to
for
short periods of an open circuit at the electrode gap.
the open position prior to the initiating of rinse extrac
The operation of the circuit of FIG. 5 is identical to
tion. Cams C1, C3 and C4 thereafter close their arma
that of FIG. 2 except during the spin cycle. At the start
ture contacts to their respective lower stationary contacts
of the spin cycle the wash tub is completely full of wash
30
and cam C7 retains its armature closed to its lower con
liquid, which of course includes wash water, whatever
tact to energize the motor start and run windings to start
additives have been placed into the water, and entrained
the counterclockwise rotation of the motor and conse
dirt removed from the clothes. As the spin cycle begins,
quent spin of the basket. As in the previous extraction
cams C1, C2, C3, C4 and C7 all have closed their arma
operation, the basket begins its rotation and water is
ture contacts to their respective lower stationary contacts.
extracted from the clothes and the wash tub until a suf 35 Both the motor start and motor run windings are ener
?cient pressure is built up in the collection chamber to
gized over the previously described paths for the spin
cause switch 30 to open the timer motor original operate
cycle. As described previously, the motor accelerates
path. Shortly thereafter cam C7 returns to its intermedi
in the spin direction and the start winding is later de
ate open position opening the alternate operate path to 40 energized when the drive motor approaches its running
the timer motor. The spin cycle therefore continues
speed. The run winding continues to accelerate and ac
without timed control until less than two inches of water
celerates the tub to its centrifuging speed. The drive
remain in the collection chamber at which time pressure
motor also operates the liquid expelling pump 8 to re
switch 30 closes its armature 38 to contact 39 reclosing
move accumulated water from the collection chamber.
the motor timer operate path. Timer motor 28.1 con
At this stage of operation, there are two energizing cir- '
tinues to rotate for the predetermined time period of two 45 cuits for the timer motor 2.8.1: from L1 through motor
minutes at which time substantially all of the extracted
28.1, through the connection point at pressure switch
water has been removed from the collection chamber
contact 38', centrifugal switch contacts M1 and M2,
and the extraction period is completed.
closed contacts 63 and 61 of cam C7, closed contacts 68,
The second method of controlling the length of the
69, and to L2; and from L1 through motor 28.1, the
spin extraction periods is by the use of spaced electrodes, 50 closed contacts R2, R1 of relay 106, closed contacts 53,
the details of which are shown in FIGS. 3 and 4 and the
54 of cam C2, and closed contacts 68, 69 to L2. Shortly
circuit of which is shown in FIG. 5. In FIG. 4 there is
after the" spin cycle begins, cam C7 contact 61 restores
shown the two electrodes 80 and 81 which are positioned
to its intermediate position, breaking the ?rst of the timer
in spaced-apart relation by the insulating ring 82. The
operating circuits. Cam C2 remains closed on its contact
spacing between these electrodes is such that an electric 55 54. As the tub approaches its centrifuging speed, liquid
circuit will be completed by water discharge from the
is ejected from the tub through the water ejection holes
tub during that portion of the extraction cycle in which
in an increasing amount. As this amount of ejected
a substantial amount of water is leaving the tub. To
liquid continues to increase, a portion of the ejected
achieve this end, the insulating ring is mounted to the
liquid ?oods electrodes 80 and 81 in the manner shown
machine outer casing 1 in the area outwardly adjacent the 60 in FIG. 3 and tends to complete the circuit across the
water ejection holes 17. A suitable mounting bracket
air gap. It has been found that the time required for the
' 83 is used to secure the ring to the casing. This mount
liquid to short this contact gap may be on the order of
ing location insures that these electrodes, by virtue of
a
seven seconds after the tub reaches centrifuging speed.
their being in the path of liquid being extracted from ‘
When the electrodes are shorted by the spray, a signal is
the tub will be contacted by this liquid flow. A secondary 65 impressed on the input circuit of cold cathode tube caus
source of liquid spray to the electrodes is furnished by a
ing the tube to ?re in the generally known manner. Fir
bleeder tube 85. This tube is fed by pump 8 in such a
ing of the tube completes the output circuit to the electro
manner that as long as water is being expelled by the
magnetic relay 106. The relay operating path may be
pump in substantial .“quantity, the bleeder tube will receive
traced from conductor lead L1 through the winding of
a small portion of this liquid in the form of a spray and 70 relay 106 and anode 105 to cathode 103 and conductor
will cause this liquid spray to impinge on electrodes 80
lead L2. On operation of relay 106, its armature R1 is
and 81, thereby completing a circuit across the air gap
drawn away from stationary contact R2 breaking the cir
between these electrodes.
1
cuit to the timer motor. The drive motor operating cir
The circuitry necessary for this electrode embodiment
is shown in detail in FIG. 5. The circuit of FIG. 5 is 75 cuit is not disturbed by the operation of relay 106 and
8,043,126
11
the drive motor continues to centrifuge the ‘tub and
operate the pump.
_
_
_
0 '
rate through drain hole 119 in the base of the box but
as long as water ?ows into the box at a greater rate, the
During this untimed extraction operation, 1n addition
‘to the spray from the liquid ejecting holes, which has
been striking the electrodes, a second spray from tube
85 has also been striking the electrodes. Tube 85, as
mentioned, acts as a bleeder from the pump and trans
box remains tilted. When the level of water in the tub
decreases, the amount of water ?owing into the box di
minishes, and as a result, the weight of water in the box
is not su?icient to overcome the bias of the spring 112
mits a spray to the electrodes as long as an appreciable
the mercury switch contacts 114 and 115.
The circuit of FIG. 7 is identical to that of FIG. 5
?ow of liquid is being expelled by the pump. Thus, the
electrodes remain shorted su?iciently to keep the _slow
and the box restores to its horizontal position reclosing
10 with the mercury switch contacts'replacing the contacts
acting relay operated as long as a substantial ?ow of liquid
of relay 106, and thus this circuit does not require the elec
is being extracted from the tub and/or substantial ?ow
tronic ampli?cation circuit 100. It can be seen in FIG.
is being processed by the pump. As a result of the
7 that contacts 114 and 115 complete a circuit for the
combined effects of these sprays, relay 106 remains oper
operation of timer motor 28.1. These contacts will re
ated until ?ow of liquid from the tub to the collection 15 main closed during the greater part of the operative cycle
chamber, and the ?ow of liquid being handled by the
of the machine and consequently maintain timer motor
pump, is too small to complete the circuit across the
electrodes 80 and 81. At this time the contact gap
across electrodes 80 and 81 opens. Opening of this
shorted path in the input circuit to the tube causes the 20
tube to stop conducting, which in turn de-energizes relay
106. The relay restores and recloses its armature R1 to
stationary contact R2. Closure of this contact pair re
closes the timer motor circuit and the timer motor again
28.1 operative in its normal manner. This contact path
is open only during the extraction period when liquid
is being extracted from the tub in su?icient quantity to
tip the water box and its attached mercury switch. Thus,
the mercury switch contacts by opening, control the vari
able length extraction operations in the same manner as
contacts R1 and R2 of the previously described second
embodiment.
operates over the previously described path. Following
While I have shown and described particular embodi
this resumption of operation, timer motor 28.1 continues
ments of my invention, I do not desire the invention to be
its timed rotation ‘for the-predetermined period which as
limited to the particular construction disclosed, and I in
previously mentioned may be two minutes. The cams
tend by the appended claims to cover all modi?cations
remain in the position required to continue the extraction
within the true spirit and scope of my invention.
cycle and the tub and pump continue to remove liquid 30 What is claimed is:
for the duration of this timed period. At the conclusion
l. A clothes washing machine, comprising a tub to re
of this timed period, cams C1, C3, and C4 all restore
ceive liquid and clothes to be washed ‘therein, means for
opening the extraction circuits.
rotating said tub to extract liquid from said tub and said
The timed controlled cycling then continues into the
clothes, mechanism for activating said extraction means
rinse ?ll and rinse operation in the previously described - to initiate rotation of said tub and subsequently to ter
manner. At the conclusion of the rinse period the ma
minate said extraction operation, means including a timer
chine enters the rinse extraction period after which a
motor to operate said extraction means activating mecha
repetition of the electrode shorting occurs providing vari
nism to initiate said extraction operation and after a pre
able length extraction. Following this variable length
determined period of operation of said timer motor to
spin rinse period, the cycle concludes.
40 terminate said extraction operation, and means responsive
This embodiment could be used with minor circuit
to a predetermined minimum rate of extraction of liquid
variations to provide an emergency shut-off mechanism
to interrupt operation of said timer motor, circuit means
in a circuit equipped as is FIG. 2. In this alternative
for maintaining said tub rotative while the timer motor
arrangement, if the pressure switch were to fail, the elec
operation is interrupted, said interrupting means respon
trodes would sense an overflow condition and shut off 45 sive to a substantial reduction in the rate of extraction of
the water input, effectively ending the danger of the ma
chine ?ooding its environs.
The third embodiment employs the construction details
shown in FIG. 6 and the circuit shown in FIG. 7, The
embodiment of FIG. 6 employs a tilting water box 110
which is secured to casing 12 in vpivotal fashion by hinge
pin 111. The box is positioned outwardly of and adjacent
to the water ejection holes 17 to catch water ejected
therefrom. The box is biased by tension spring 112 to
normally remain in substantially its horizontal position
as shown in FIG. 6. A mercury switch 113 is a?ixed to
the box in any known manner so that it follows the
liquid to restore operation of said timer motor to complete
its said period of operation.
2. A clothes washing machine, comprising a tub to re
ceive liquid and clothes to be washed therein, means for
rotatably mounting said tub, means for rotating said tub
at a speed for centrifugal extraction of said liquid from
said tub and said clothes, a chamber for receiving said
liquid, switch means for controlling operation of said tub
rotating means initiate and subsequently to terminate said
extraction operation, means including a timer motor to
operate said switch means to a ?rst position to initiate
said extraction operation and after a predetermined pe
motion of the box from the horizontal position to the
riod of operation of said timer motor to operate said
tilted position indicated by the dotted lines in FIG. 6.
switch means to a second positionqterminating said oper
With the box in the horizontal position, contacts 114 60 ation, switch means for controlling operation of said timer
and 115 of the mercury switch complete a closed circuit
motor, means responsive to a predetermined minimum
path to the timer motor, and with the box in the tilted
accumulation of liquid in said chamber to actuate said
position these contacts open the circuit path.
timer motor controlling switch means from a ?rst position
The operation of the third embodiment may be de
effecting operation of said motor to a second position
scribed generally as follows: normally the water box is
interrupting the operation thereof, and means operating
retained in the horizontal position by the action of the
continuously during said extraction operationv for main
bias spring. Water is ejected from the tub and strikes
taining said tub rotative and for removing liquid from
the angled lid 118 and is de?ected into the body proper
said chambervat a rate less than the rate of accumulation
of the box. When the weight of water received has in
of liquid therein during the initial period of the extrac
creased sufficiently to overcome the bias of spring 112, 70 tion operation, whereby liquid will promptly accumulate
the box tilts to the position shown by the dotted lines in
beyond said predetermined minimum but subsequently
FIG. 6. When the box tilts to this position, the mercury
will reduce to an amount insufficient to maintain said
switch also tilts following the action of the box and
timer motor controlling switch means in its said second
' opens the circuit through contacts 114 and 115.
The
position, whereupon said timer motor controlling switch
water in the box continually tends to drain out at a slow 75 means will restore the timer motor to operation.
3,043,125
13
3. In a clothes washing machine comprising a tub to
receive liquid and clothes to be washed therein, means
for extracting liquid from said tub and said clothes, means
for storing liquid extracted from said tub, means for
expelling stored liquid, means for activating said extract
ing means and said expelling means simultaneously, means
including a time controller operative to initiate said acti
vating means, means responsive to a predetermined quan
r
14
inactivation rendering said time control means operative
to fontinue said conducting of the machine through its
eye e.
7. In a machine as claimed in claim 6, said circuit
means comprising a plurality of electrodes positioned to
be short-circuited by liquid being extracted from said tub,
and a control circuit including an operating path to said
time control means, means in said control circuit respon
srve to short-circuiting of said electrodes for opening said
tity of liquid having been stored for rendering said time
control means inoperative and retaining said extracting 10 operating path and maintaining said path open as long
means and said expelling means active thereafter, said
liquid responsive means further responsive to less than
as said electrodes remain short circuited.
said predetermined quantity of liquid remaining stored
mg member positioned to receive liquid extracted from
said tub, means for biasing said member in a ?rst posi
for rendering said time control means re-operative, said
_ 8. In a machine as claimed in claim 6, a liquid retain
time control means thereafter de-activating said extract 15 tron, said circuit means comprising contactors in the oper
ating path to said time control means; said contactors
ing means and said expelling means.
maintaining said path closed with said member in said
4. In a clothes washing machine comprising a tub to
?rst position, said retaining member on receipt of liquid
receive liquid and clothes to be washed and rinsed there
being extracted pivotal to a second position, said con
in, means for extracting liquid from said tub and said
clothes after a washing or rinsing operation, chamber 20 tactors responsive to said receiving member pivoting to
means for storing liquid extracted vfrom said tub, means
said second position for opening said path, and means in
said retaining member for draining received liquid there
for expelling stored liquid from said chamber, means for
activating said extracting means and said expelling means
from, said .bias means responsive to substantially an
simultaneously, means including a time controller oper
absence of liquid in said member ‘for restoring said mem
ative to initiate said activating means, means responsive 25 be!‘ to said ?rst position, said contactors responsive to
to more liquid having been extracted than expelled for
sald member restoring to said ?rst position for re-closing
rendering said time control means inoperative and re
the operating path to said time control means.
taining both said extracting means and said expelling
9. In a clothes washing machine having an outer liquid
means active thereafter, said liquid responsive ‘means fur
storage chamber and an inner imperforate tub, said in
ther responsive to a diminution of liquid being extracted 30 ner tub adapted to receive liquid and clothes to be washed,
from said tub for rendering said time control means re
timing means operative to conduct said machine through
operative, said time control means thereafter de-activating
a cycle of operations including a tub ?lling operation and
said extracting means and said expelling means after the
for initiating a liquid removal operation, means for cen
passage of a predetermined length of time.
trifugally extracting liquid from said tub to said chamber
5. In a clothes washing machine comprising a tub to 35 during said liquid removal operation, a plurality of liquid
receive liquid and clothes to be washed therein, means for
election passages about the upper periphery of said tub
extracting liquid from said tub and said clothesysaid
eifecting said liquid extraction, contact means positioned
extracting means having a maximum extraction ‘ rate,
on said chamber adjacent said passages and responsive
means for storing liquid extracted from said tub, means
to the ?ow of liquid through said passages for interrupting
for expelling stored liquid, said expelling means having a 40 a circuit path to said timing means and rendering said
maximum expulsion rate less than the maximum rate of
timing means inoperative, and circuit means for retain
said extracting means, means for activating said extract
ing said liquid extracting means operative with the timing
ing means and said expelling means simultaneously
means inoperative, said contact means responsive to the
whereby said extracting means extracts initially at sub
absence of liquid being extracted through said passages
stantially its maximum rate and said expelling means 45 during said extraction cycle for retoring said timing means
expels liquid at substantially its maximum rate, means
circuit path to render said timing means reoperative to
including a time controller operative to initiate said acti
continue the conducting of said machine through the re
vating means, means responsive to storage of liquid from
mainder of said cycle of operations.
said tub at said extraction rate greater than the expulsion 7
10. In a machine as claimed in claim 9, said contact
rate for rendering said time control means inoperative 50 means comprising a plurality of electrodes positioned to
and retaining said extracting means and said expelling
be short circuited during the ?ow of liquid from said water
means operative, said extracting means operative at sub
ejection passages.
stantially less than the maximum rate when substantially
_ ll. In a machine as claimed in claim 9, a liquid recep
all of the liquid has been extracted from said tub, said
tlve structure having a liquid receiving opening adjacent
liquid responsive means further responsive to the diminu 55 said passages, means for biasing said structure in a ?rst
tion of stored'liquid resulting from said expulsion rate
position, said structure responsive to liquid received there
becoming substantially greater than the extracting rate to
in for_assuming a second position, said contact means
thereafter render said time control means re-operative,
comprising a mercury switch physically movable with
said time control means on re-operation de-activating said
said structure between a closed circuit condition in said
extracting means and said expelling means after the pas 60 ?rst position and an open circuit condition in said second
sage of a predetermined length of time.
position.
.
6. In a clothes washing machine comprising a tub to
12. In a clothes washing machine comprising a tub to
receive liquid and clothes to be washed therein, time
receive liquid and clothes to be washed therein, control
control means operative for conducting said machine
means for conducting said machine through a sequence of
through a cycle of operations including at least one liquid 65 operations including a liquid ?ll operation, a washing
introducing operation, means for extracting liquid from
operation and a liquid extraction operation, said control
said tub for subsequent removal from said machine, said
means comprising timing means for controlling said ma
time control means operative to render said extracting
chine through said ?ll ‘and said wash operations and to
means operative, and circuit means positioned to be acti
initiate said extraction operation, circuit means normally
vated by liquid being extracted from said tub, said circuit 70 closed for maintaining said timing means in control of
means on activation rendering said time control means
said operations, means responsive to the initiation of said
inoperative, said extracting means thereafter remaining
operative to continue extracting liquid from said tub, said
extraction period for centrifugally extracting liquid from
said tub, said extracting means extractive of liquid at a
circuit means responsive to an absence of liquid being
extracted for becoming inactive, said circuit means on 75 variable rate dependent on the amount of liquid in said
3,043,125
15
16
tub, means responsive to the extraction of liquid at a
rate corresponding to a large amount of liquid in said
tub for opening said circuit means to interrupt the con
time control means whereby to place the duration of said
extraction operation under the control of switch mech
anism, means in said liquid receiving box structure for
trol of said timing means, extracting means circuit mem
bers eifective to maintain said extracting means continual
emitting liquid from said structure, said bias means re
sponsive to a diminution of liquid remaining within said
structure for returning said structure to said horizontal
position, said switch mechanism responsive to said return
for closing the circuit to said time control means to re
ly extractive with said timing means control interrupted,
said extraction responsive means further responsive to a
rate of liquid vbeing extracted corresponding to a small
amount of liquid in said tub for closing said circuit means,
said circuit means on re-closure restoring said timing
means to control of said sequence of operations, said tim
ing means being thereafter operative to render said extract
ing means control members ineffective and terminate said
turn the duration control to said time control means.
18. In a clothes washing machine comprising a tub
for receiving liquid and laundry to be washed therein,
time control means operative to guide said machine
through a cycle of operations including a wash opera
extraction operation.
tion and into an extraction operation, means for extract
‘13. A clothes washing machine, comprising a tub to 15 ing liquid from said tub during said extraction operation,
receive liquid and clothes to be washed therein, mech
said extracting means activated by said time control
anism for effecting the extraction of liquid from said tub,
means to start said liquid extraction, liquid receiving
time-cycle means for initiating the operation of said
means positioned in the path of liquid being extracted
mechanism and for maintaining said operation for a cer
from said tub, said liquid receiving means comprising a
tain period of operation of said time-cycle means, an 20 box structure for receiving and retaining extracted liquid,
electric motor for operating said time-cycle means, a
means for mounting said box in an oil-center condition
chamber for collecting liquid extracted from said tub,
with respect to the center of gravity of the box structure,
means for continuously removing liquid from said cham
means for normally biasing said box to remain in a sub- ber, switch means in an energizing circuit for said timer
stantially horizontal position, a switch mechanism
motor, and means responsive to a predetermined ac 2 5 mounted to said box, said switch mechanism responsive
cumulation of liquid in said chamber to actuate said
to said box remaining in said horizontal position for
switch means to interrupt the energizing circuit of said
maintaining a closed circuit to said time control means,
time cycle motor, means for maintaining the operation of
said box responsive to the receipt of a quantity of liquid
said water-extraction mechanism during the period of in
extracted from said tub for gravitationally tilting against
activity of said time-cycle motor, said actuating means 3 0 the e?ect of said biasing means to' an oblique position,
responsive to the removal of liquid from said chamber
said switch mechanism responsive to said tilt motion for
for actuating said switch means to restore operation of
opening said closed circuit to said time control means
said timer motor to complete the said certain period of
whereby to place the duration of said extraction operation
operation of said timer-cycle means, whereby the period
of operation of said extraction mechanism comprises the
sum of the active and inactive periods of said time-cycle
35
under the control of said switch mechanism, a drain aper
ture in said liquid receiving box to gravitationally emit
liquid remaining in said box, said bias means respon
motor.
sive to a diminution of liquid remaining within‘ said box
for returning said box to said horizontal position, and said
13, in which said switch means is operated to interrupt
switch mechanism responsive to said return of said box for
40
said time-cycle motor circuit in response to a predeter~
re—closing the circuit to said time control means to return
mined load of liquid in said chamber.
the duration control to said time control means.
15. The clothes washing machine according to claim
19. In a clothes washing machine comprising a tub to
13, in which said switch means is operated to interrupt
receive ‘liquid and laundry to be washed therein, time
said time-cycle motor circuit in response to a predeter
control means for conducting said machine through a
14. The clothes washing machine according to claim
mined weight of liquid in said chamber.
‘
16. The clothes washing machine according to claim
13, in which said collection chamber is pivotally mounted
cycle of operations including a liquid introducing and
washing operation, an outer chamber surrounding said
chamber and return to said ?rst position upon a reduction
tub, means operative to extract liquid from said tub for
storage in said chamber, pump means operative to expel
liquid from said chamber, said time control means opera
tive at the conclusion of said washing operation for start
in said weight of liquid, and said switch means is op
ing an extraction operation by rendering said extracitng
for movement from a ?rst position to a second position
in response to a predetermined weight of liquid in said
erated to its respective positions according to the position
of said collection chamber.
17. In a clothes washing machine comprising a tub
for receiving liquid and laundry to be washed therein,
and rendering said pump means operative, an extraction
control device positioned in the path of liquid being ex
tracted from said tub, said extraction control device com
prising a pair of spaced electrodes positioned to be
time control means operative to guide said machine
shorted by a ?ow of liquid being extracted from said
through a cycle of operations including a wash operation
tub, a circuit network controlled by the shorting of said
and into an extraction operation, means for extracting
electrodes for inactivating said time control means and
liquid from said tub during said extraction operation, said
for retaining said time control means inactive for the
extracting means activated by said time control means to 63 duration of extractive ?ow of liquid, a bleeder tube for
start said liquid extraction, liquid receiving means posi
feeding liquid being expelled from said pump means to
tioned in the path of liquid being extracted from said tub,
said electrodes for aiding in maintaining said electrodes
said liquid receiving means comprising a box structure
shorted out, said circuit network responsive to the cessa
for receiving and retaining extracted liquid, means for
tion of extractive liquid ?ow and cessation of flow
mounting said box structure eccentrically of the box
through said bleeder tube resulting in opening of the
structure center of gravity, means for normally biasing
short across said electrodes for re-activating said time
said structure to remainin a substantially horizontal posi
‘ control mean-s to continue the operations of said ma
tion, a switch mechanism normally maintaining a closed
chine.
circuit to said time control means, said structure ec
20. In a clothes washing machine comprising a tub
centric mounting responsive to the receipt of a quantity
to receive liquid and laundry to be washed therein, time
of liquid extracted from said tub for gravitationally tilt
control means for conducting said machine through a
ing movement against the effect of said biasing means
cycle of operations including a liquid introducing and
to an oblique position, said switch mechanism responsive
washing operation, an outer chamber surrounding said
to said tilt motion for opening said closed circuit to said 75 tub, means operative to extract liquid from said tub for
3,043,125
17
storage in said chamber, pump means operative to expel
liquid from said chamber, said time control means opera
tive at the conclusion of said washing operation for ren
dering said extracting and rendering said pump means
operative, an extraction control device positioned in the
path of liquid being extracted from said tub, said extrac
tion control device comprising a pair of spaced electrodes
positioned to be shorted by a ?ow of liquid being ex
tracted from said tub, a circuit network controlled by
the shorting of said electrodes for inactivating said time 10
18
trifugally extracted therefrom by rotation of said tub;
the combination of a motor for rotating said tub to ef
fect such extraction, an energizing circuit for said motor,
a switch in said circuit, a motor-driven timing device for
operating said switch to energize said tub motor circuit
to initiate said extraction operation and to deenergize said
motor circuit after a ?xed time period of operation of
said timing device which may be substantially less than
that required to complete the extraction operation, means
for energizing said timing device, means e?ective sub
control means and for retaining said time‘ control means
inactive for the duration of extractive ?ow of liquid, a
sequent to the commencement of said extraction opera
ing short intervals between shorting of said electrodes,
the desired centrifugal extraction is approaching comple
tion but prior to the expiration of said ?xed time period
to‘disable said timing device and thereby maintain said
bleeder tube for feeding liquid being expelled from said
pump means to said electrodes for aiding in maintaining
extraction operation for a time not determined by said
said electrodes shorted out, said circuit network includ 15 ?xed time period, means for sensing the rate of extraction
of liquid ‘from said tub and clothing, and means respon
ing a slow acting relay to delay the restoration of and
sive to ya reduction in said extraction rate indicating that
thereby to maintain said time control means inactive dur
tion to restore operation of said timing device for inter
said circuit network responsive to the cessation of ex
tractive liquid ?ow and cessation of ?ow through said 20 ruption of said tub motor circuit at the end of said ?xed
time period.
bleeder tube resulting in opening of the short across said
electrodes for releasing said relay and thereby re-activat
ing said time control means ‘to continue the operations of_
said machine.
'
21. In a clothes washing machine of the type in which 25
clothes are washed in a quantity of liquid in a tub and
the liquid in said tub and clothes is subsequently cen
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,561,119
2,968,174
Horva-th ____ -i ______ .... July 17, 1951
Bell et a1. ___________ .... Ian. 17, 1961
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