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Патент USA US2130160

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Sept. 13, 1938.
A, SCHELLENBERG
~
2,130,160
CENTRI FUGAL EXTRAC TOR
Filed Sept. 7, 1957
4 Sheets-v-Sheet l
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Sept. 13, 1938°
A. SCHELLENBERG
2,130,160
CENTRIF'UGAL EXTRACTQR
Filed Sept’. 7. 1957
532'”
-
'22
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4 Sheets-Sheet 2
Sept. 13,'1938.
' A. SCHELLENBERG
2,130,160
CENTRIFUGAL EXTRAGTOR
Filed Sept. '7, 1957
,
‘
4 Sheets-Sheet 3
(five/afar;
Q/Zgr/ é‘aZe/ézziefrg
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SePt- 13, 1938.
A. SCHELLENB’ERG
‘ I
2,130,160
CENTRIF‘UGAL EXTRACTOR
Filed Sept. ‘7, 1937 -
'/20
‘4 Sheets-Sheet '4
?atented Sept.- 13, .1938
2,130,160
UNITED STATES
PATENT OFFICE 1
2,130,160
OENTRJFUGAL Exmo'ron
Albert Schellenberg, Joliet, Ill.
Application September r, 1937, Serial No. 162.586.
(Cl. 210-72)
This invention relates to centrifugal extractors, have as littleclearance between the basket wall
and the tub as necessary for satisfactory oper
‘and has reference more particularly to centrifu
10 Claims.
gal clothes dryers‘.
ation and safety. When low speeds are being uti
-
In devices-of this character it is customary to
5 provide a perforated bowl or basket into which
wet clothes may be placed after washing, and to
provide driving means whereby the bowl may
then be rotated at a high rate of speed,'in such
a manner that the centrifugal force acting on the
10 moisture carried by the clothes will‘ drive this »
low for the vibratory‘movement of the basket,
but it will be readily seen that the rotation of
the basket will not only exert centrifugal force
upon the water. and clothes within ‘it, but also
upon the air it contains, and that when extreme
1y high speeds are being used this air creates a
walls of the basket and’leave the clothes in a sub
decided effect on the mechanism which should be
compensated for if best results are to be obtained.
stantially dry condition.
Apparently the high speed rotation of the basket‘
moisture outwardly through the perforated side
.
Since centrifugal ‘force is directly proportional
causes an uneven pressure condition within the
to the square of the velocity it is obvious that
the extracting e?iciency of the device will vary in
accordance with the speed at which the basket
is rotated. Howeven'it will be readily under
stood that in order to be practicable, the basket
tub, with the result that the rotating basket tends
to gyrate about a horizontal orbit that grows
20 must be of su?icient size to accommodate a con
25
lized this clearance need only be enough to al
larger as the speed is increased. .Since this move
ment cannot be permitted without danger of
having the rotating basket strike the tub, it has
been found desirable to provide ventilating
ducts to relieve the pressure condition within the
siderable volume of clothing and that when this
Wet clothing is placed in the machine it will not
ordinarily be so carefully or expertly distributed
tub.
as to maintain a dynamically balanced condition
tion to‘ provide an improved suspension for cen
in the rotating basket.
trifugal machines.
1
_
For these reasons it has been impractical to
rotate the basket at as high speeds as are desir
able for maximum effectiveness, since any severe
unbalanced load condition would cause excessive
30 vibration, which, when transmitted to the ma
chine frame often causes the machine to move
bodily about the ?oor and be generally noisy and
unpleasant or even dangerous to operate. ‘This
is particularly true in connection withsmall units
35 of the ordinary household type, since these ma
.
‘
It is, therefore, a primary object of this inven-v
,
25
_
Another object is to provide a suspension for
centrifugal machines of such a nature as to per
mit free vibrational movement of the moving
parts without transmitting my perceptible vi—
30'
bration to the supporting frame.
Another object is to provide a suspension for
centrifugal machines of such a nature as to per
mit rotation of the principal parts around their
center of gravity as differentiated from their geo
35
metric center.
' Another important object of this invention is
chines are customarily provided with only a very
light frame and not ordinarily anchored to the
to provide a suspension for centrifugal machines
operating floor.
of such a nature as to permit free vibration and
-
1
gyration about any point determined by the dy
In the preferred embodiment of the present
dill invention the basket and driving motor are
namic characteristics of the device, without re
a tanner that the vibration is not transmitted
vibration is facilitated by first reducing the vi
bratory movement to its component parts.
40
mounted on a bearing housing in such a manner spect to the point of suspension.
Another object is to provide a suspension for
' that they comprise a unit" that is free to vibrate,
but isfsu‘spended from the machine frame in such 7 : vibrating mechanisms-wherein the absorption’of
45 thereto.
This mode of construction permits the
utilization of basket speeds not heretofore prac
ticable for the reasons herein pointed out,-but it
alsogivesarise to new dimculties, or rather, it
makes it desirable to give special attention to
50 certain physical phenomena heretofore present
but negligible in degree.
~
"It isithe customary practice to enclose'the ro- I
.atlng basket ma- tub or housing, in order to
catch the water thrown from the basket during
55 the extracting operation, and it is desirable to
Another object is to provide an extractor unit
.mounted for free vibration as limited by a stabi- ’
lizing weight.
_
_
Another object is to provide'means for venti
_ lating a centrifugal extractor.
50
’ Referring now to the drawings in which a pre- -
ferred embodiment'of the'invention has been il
lustrated:
I
Fig. l is a perspective view of
chine and extractor unit:
’
a washing ma
.
>
2,130,160
2
Fig. 2 is a sectional view through the extractor;
forated in any desirable manner, but it has been
_ Fig. 3 is a detail sectional view taken on the
found advantageous in certain instances to form
line III-III in Fig. 2;
Fig. 4 is a plan section taken on the line IV—IV
construction 'a- lip portion 65 is bent outwardly "
of Fig. 2;
Fig. 5 is a detail sectional view showing a mod
i?ed form of stabilizing weight adapted to house
a centrifugal pump;
1
»
Fig. 6 is a detail sectional view showing a mod
10 i?ed form of stabilizing weight;
.
Fig. 7 is a detail sectional view of a modi?ed
stabilizing construction;
.
a perforation as illustrated in Fig. 3.
In this
from the basket wall 51 to form an abrupt shoui— CY
der 66 at its trailing edge. The high speed of
rotation of the basket 55. causes an area of par
tial vacuum to form behind this shoulder 66 and
this vacuum assists the centrifugal force exerted
within ‘the basket'in withdrawing the moisture 10
from the clothes.
I
'
_ An upwardly extending sleeve 9| is provided
in the bottom portion 02 of the extractor tub
I5 in order to prevent the water from draining
. In the unit here illustrated a washing machine through the opening 93 provided to accommodate
I0 which is provided with any customary type of ‘_ the drive shaft 46. Any desirable means may be
agitator II in the usual manner is mounted on provided for draining the extractor tub I5, as,
a framework I2 supported by legs I3 to which is for example, a rubber hose 94 which may be pro
fastened a skirt I4. An extractor tub I5 is also vided with a pump, if desired.
In the modi?ed form of stabilizing weight, as
carried by the frame I2 and is enclosed by a
jacket I6 suitably spaced therefrom so ‘as to pros illustrated in Fig. 5, the weight 95 is provided
vide an air chamber I‘I between the outer wall with a housing 96 formed integrally therewith
of the extractor tub and the'inner wall of the and adapted to house an impeller type pump 91
jacket. A plurality of relatively large openings driven by the motor v40. The .upper side of the
I8 are provided near the bottom of the extractor housing‘ 96 is closed by the plate 98 secured by 25
tub I5 to permit the air to pass freely from the means of bolts 99 and provided with a gasket
I 0| to prevent leakage. Suitable packing I03 is
extractor tub I5 to the air chamber H. The up
per portion‘of the air chamber I1 is closed by‘ a provided around the shaft 46 of the motor 48.
top I 9 having aplurality of perforations‘2l to The drain hose 94 may then be connected to the
permit the free passage of air therethrough. The intake port I04 of the pump 91 and the pressure 30
extractor tub I5 is closed at the top by‘ a cover hose I05 may be provided at the outlet port I06:
22 having perforations 23 provided therein to ‘of the pump.
In some instances it may be advantageous to
permit an unhindered circulation of air through.
the cover.» A drain board 24 is provided between provide a stabilizing weight. of a hollow construc
the top of thelextractor tub I5 and the washing tion such that its own weight is negligible‘ but
- that it may be ?lled with heavy material when
machine tub I0 inthe customary manner;
Two pairs of lugs 26 are secured to the frame
desired. In Fig. 6 such a weight has been shown
work I2 anda sleeve 21 is bolted into position comprising an upper‘portion I01 and a bottom
between each of these pairs of lugs 26 by means I00. Sleeves I09 are provided to accommodate
bolts III by which the entire construction is se 40
of bolts 26. vA resilient strap 29 which is pref
erably made of rubber is carried by each of these cured to the motor 46. A ?lling plug II2 per
sleeve portions 21 and extends downwardly to a mits the tank to be ?lled with any desirable
Fig. 8 is'a plan section of the’ modi?ed con
struction illustrated in Fig. '7.
15
20
35
40
,
'
similar sleeve and bolt assembly 3|. Strap iron
material, as,'for instance, water.
arms 32'are secured to the sleeve and. bolt as
In Figs. '7 and 8 a modi?ed form of stabilizin
construction haslbeen shown in which the sta
45 sembly 3i and extend diagonally upward. At the
upper ends of these strap
pair of resilient straps 33
of sleeves 34 and bolts 35.
carried at the lower ends
iron arms 32 aosecond
are secured by means
Similar sleeves 36 are
of the resilient straps
50 33 and these in turn are bolted to a pair of angle
irons 31. A bearing housing H is bolted to the
angle irons 31 by means of cap screws 42 and
carries an upper bearing '43 and a lower bearing
44, each'of which is provided with an oil reservoir
55 45, as is customary in the art.
A vertical drive shaft 46 is journaled in the
_ bearings 43 and 44 and a thrust bearing 41 is
provided adjacent its lower end. An electric mo
tor 40 is bolted to the bearing housing 4I by
80 means of cap screws 49 and is coupled to the
lower end of the drive shaft 46 by means of the
coupling 5|. A stabilizing weight 52 is secured
a to the‘motor in any convenient manner, as for
65
example, by means of cap'screws 53.
An extractor basket 55 is provided with an
opening 56 at the top and perforated side walls
51 in the customary manner. The lower edges
of these side walls 5.1 are secured to the bottom
plate 58 by the rivets 59 and this bottom plate
70 58 is provided with a hub portion 6| bolted to
the tapered end portion 62 of the ddve shaft 46
-
bilizing weight H4 is provided with lugs I I5 to
which the resilient straps II 6 are secured by
means of bolts Ill and sleeves II8.
45
These re
silient straps II6 extend radially from the sta
bilizing weight H4 and are secured to lugs H0 50
carried by the lower frame I20 by means of bolts
-I2I and sleeves I22. These resilient straps II6
tend to resist the movement and dampen the vi
bration of the stabilizing weight H4 and may in
certain instances permit the use of a smallerv
weight without decreasing, the efficiency of the
machine.
While it is believed that the operation of the
device as herein described will be readily apparent
to those skilled in the art, it will here be brie?y
reviewed.
The clothes to be washed will, of course, be
placed in the washing machine tub in a soap and
'water solution where they will be agitated by the
agitator II. When the washing has been com 65
pleted the clothes will be lifted from the wash
ing machine I0 and inserted into the extractor
basket 55 within the centrifugal extractor tub
I5. The cover 22 will then be locked in a closed
position and the extractor basket rotated by the 70
driving motor 48. If the clothes are placed in
by means of the nut 63. A key 64 is provided the extractor basket 55 in such a manner that
to prevent relative rotation between the drive‘ .the basket 55 is in a dynamically balanced con
shaft 46 and the extractor basket 55. The side dition, it is obvious-that the high speed of ro
walls 51 of the extractor basket 55 may be per
tation will not tend to vcause-any perceptible
3
9,180,160
Patent Office statutes, I am aware that certain
modi?cations may be made and, therefore, do
not wish to be limited except as by the ‘scope of
amount of vibration. However, it will be readily
understood that it is highly improbable that the
clothes will be so placed as to accomplish this
result. If the basket 55 is overloaded on one
the appended claims.
I claim:
1. In a centrifugal machine, instrumentalities
side, the center of gravity of the basket and load
will be at a point spaced apart from the geometric
center of the basket. In this case the basket‘
55 will tend to rotate about its center of gravity
rather than its geometric center. It will then
for facilitating the drying of clothes, compris
ing a frame, a tub, a rotatable clothes container
located within the tub formed to permit the dis
charge of water therefrom, means for effecting
rapid rotation of the container including a driv
en shaft and a motor suspended therewith for
driving the shaft, and suspension means for the
container, shaft and motor permitting a free
dom of lateral bodily movement thereof under 15
rotation of various loadings of the container, said
be seen that the drive shaft 46 will be effective
to rotate the basket 55, but since the basket 55
will be rotating about its center of gravity rather
than about the axis of the shaft, the'shaft 46
will also revolve in an orbit, the radius of which
15 will be equal to the distance between the geo
metric center ‘of the basket 55 and its center of
gravity. In either event the weight of the driv
ing motor 48 and the stabilizing weight 52 will
be suf?cient to maintain the drive shaft 46 in
20 a substantially vertical position and to exert ‘a
limiting in?uence upon its vibration. From this
suspension means including a mounting for the '
shaft and separate longitudinally, stretchable and
laterally ?exible supporting devices for said
mounting located at spaced points circumferen
tially of the shaft and attached to said mount
ing and to said frame whereby said devices in
it will be seen that the extractor basket 55 may
termediate their, points of attachment to the
rotate about its center of dynamic balance and
that the drive shaft 46, bearing housing 4| and
25 associated parts will be the only parts of the de
vice subject to extreme vibration. Since this
bearing housing 4| is of relatively small mass
and is freely supported by the resilient straps
33 and 29, it will be apparent that there will be
mounting and frame will conform to strains and
forces imparted thereto longitudinally and later- 25
ally of the shaft to absorb resultant vibrations.
2. In a centrifugal machine, instrumentalities
for facilitating the drying of clothes, comprising
aframe, a tub, a rotatable clothes container lo
cated within the tub formed to permit the dis- 30
30 very little side thrust upon the bearings 43 and
charge of water therefrom, means for effecting '
44 and that the power exerted by the driving
motor 48 will therefore be fully utilized in rotat
rapid rotation of the container’ including a driv
en shaft and a motor suspended therewith for
ing the extractor basket 55.
driving the shaft, and suspension-means for the
container, shaft and motor permitting a freedom 35
' The bearing housing 4| and angle irons 31
35 comprise a secondary frame, and as the bearing
housing 4| vibrates, this vibration is transmitted
by the angle irons 31 to the sleeves 35 suspended
of lateral bodily movement thereof under rota
tion of various loadings of the vcontainer, said
at the lower ends of the resilient straps 33. These- ' suspension means including a mounting for the
shaft and separate longitudinally stretchable‘and
laterally ?exible supporting devices for said 40
mounting located at spaced points circumferen-,_
resilient straps 33 are free to swing about the
40 upper sleeves 34 and will therefore readily ab
‘sorb all of the components of vibration acting
at right angles to'the ?at surfaces of these straps ~ tially of the shaft and attached to said mount-.
ing and to said frame whereby said devices in
33. The components of vibration acting in a di
rection parallel to the ?at surfaces of the straps termediate their points of attachment to the
33 will be transmitted to the upper sleeves 34 mounting and frame will conform to strains and 45
and bolts 35 and thence to the bolt assemblies
3| by means of the angularly extending strap
irons 32. These remaining components of vibra
tion will then be absorbed by the resilient straps
29 swinging about the sleeves 21 and bolts 28.
Due to the fact that the coe?icient‘ of hysteresis
of rubber is very high, its adaptability to absorb
energy and not transmit it is correspondingly
great and it will thus be seen that the motor sus-,
pension as herein described will not only elimi
hate all vibration at right angles to the drive
shaft 46, but is also capable of absorbing a cer
tain amount of vertical vibration.‘
60
.
>
'
In general it will be apparent that the present
invention does not necessarily attempt to pre
vent vibration of the drive shaft nor of any spe
ci?c point thereon. Rather the construction is
such that it allows the rotatingparts of relatively
great mass to rotate about their dynamic centers
whereupon the drive shaft 46 and associated parts
65
are free to vibrate about any point or points de
termined by the dynamic character of the de
forces imparted thereto longitudinally and later
ally of the shaft to absorb resultant vibrations,
some of said supporting devices being oppositely
disposed and in substantiallyparallel relationship
to permit automatic displacement of the con- 50
tainer, shaft and motor in substantially horizon- ’
tal planes.
.
_
u
3. In a centrifugal machine, instrumentalities
for facilitating the drying of clothes, comprising
a frame, a tub, a rotatable clothes container 10-55
cated within the tub formed to permit the dis
charge of water therefrom, means for effecting
rapid rotation of the container including a driven
shaft ‘and a motor suspended therewith for driv
ing the shaft, and suspension means for the cori- 60
tainenshaft and motor permitting a freedom‘
of lateral bodily movement thereof under rota
tion of various loadings of the container, said
suspension means including a mounting for the
shaft and separate longitudinally stretchable 65_
and laterally ?exible supporting devices for said
mounting located at spaced points circumferen
vice. The resilient suspension is then so arranged tially of the shaft and attached to vsaid mounting
that this vibration will not be transmitted to the and to said frame whereby said devices inter
frame of the machine with the result that a ma ' mediate their points of attachment to the mount- v70
ing and frame stretch or contract endwise and in
chine constructed in accordance with the princi
directions diagonally of the axis of the shaft
when in its normal position, in keeping with
While I have shown and described a preferred \shifting and tilting in?uences of the container, 75
shaft and motor thereon.
75 embodiment of this invention as required by the
ples of this invention will be silent, efficient, and
long-lived.
4
2,130,100
4. In a centrifugal machine, instrumentalities
motor thereon.
a frame, a tub, a rotatable clothes container
7. In a centrifugal machine, instrumentalities
for facilitating the drying of clothes, comprising
located within the tub. formed to permit the dis
charge of water therefrom, means for effecting
rapid rotation of the container including a driven
shaft and a motor suspended therewith for driv
ing the shaft, and suspension means for thecon
tainer, shaft and motor permitting a freedom of
10 lateral bodily movement thereof under rotation
of various loadings of the container, said sus
pension means including a mounting for the
shaft and elastic sheets constituting separate
longitudinally stretchable and laterally ?exible
15 supporting devices for said mounting located
at spaced points circumferentially of the shaft
and attached to said mounting and to said frame
whereby said devices intermediate their points
of ‘attachment to the mounting and frame stretch
20 or contract endwise and in directions diagonally
of the axis of the shaft when in its normal po
sition, in keeping with shifting and tilting in
?uences of the container, shaft and motor there
on.
so
_
a tub, a rotatable clothes container located with
in the'tub formed to permit the discharge of
water therefrom, means for effecting rapid ro
tation of the container including a driven shaft
connected with the latter and a power means for
driving the shaft-and supported therewith and
with the container in substantially free suspen
sion, and supporting means therefor comprising
separate supporting devices located at spaced
points circumferentially of the shaft, said de
vices comprising elastic supports formed and
secured to expand, contract or flex throughout.
the length thereof whereby to conform to corre
sponding forces tending to set up vibration.
8. In a centrifugal machine, instrumentalities
for facilitating the drying of clothes, comprising 20
a tub, a rotatable clothes container located with
in the tub formed to permit the discharge of
water therefrom, means for effecting rapid ro
tation of the ‘container including a driven shaft
5. In a centrifugal machine, instrumentalities
connected with the latter and a power means for
for facilitating the drying of clothes, comprising
driving the shaft. and supported therewith and
a frame, a tub, a rotatable clothes container lo
with the container in substantially free suspen
sion, and supporting means therefor including
supporting devices located at spaced points cir
cumferentially of the shaft, said devices com
cated within the tub formed to permit the dis
charge of water therefrom, means for effecting
rapid rotation of the container including a driven
_ shaft and a motor suspended therewith for driv
prising elastically yieldable elements‘, and means
for attaching said elements at one end to a part
ing the shaft, and suspension means for the con
tainer, shaft and motor permitting a freedom of
of the machine ‘and at the opposite end to the
lateral bodily movement thereof under rotation
shaft, power means and container supported
of various loadings of the container, said sus
pension means including a mounting for the
shaft and separate longitudinally stretchable
therefrom, whereby said elements, may stretch
endwise and ?ex laterally in the areas between
their points of attachment.
and laterally ?exible supporting devices for said
mounting located at spaced points circumferen
for facilitating thedrying of clothes, comprising
40 tially of the shaft and in a zone intermediate the
9. In a centrifugal machine, instrumentalities
a tub, a rotatable clothes container located with
“container and the motor whereby the latter
may constitute a counterbalancing medium at a
in the tub formed to 'permit'the discharge of
water therefrom, means for effecting rapid rota
point substantially below the supporting devices,
said devices being attached to, said mounting
tion of the container including a driven shaft
connected with the latter and a motor for driv
45 and to said frame whereby said devices interme
diate their points of attachment to the mount
ing and frame will conform to strains and forces
imparted thereto longitudinally and laterally of
the shaft to absorb resultant vibrations.
6. In a centrifugal machine, instrumentalities
50
for‘ facilitating the drying of clothes, comprising
a frame, a tub, a rotatable clothes container lo
cated within the tub formed to permit the dis
charge of water therefrom, means for effecting
55 rapid rotation of the container including a driven
shaft and a motor‘ suspended therewith for driv
ing the shaft, and suspension means for the con
tainer, shaft and motor permitting a freedom of
lateral bodily movement thereof under- rotation
0 of various loadings of the container, said sus
pension means including a mounting for the shaft
65
tilting in?uences of . the container, shaft'and
for facilitating the drying of clothes, comprising
ing the shaft supported therewith and with the‘
container in substantially free suspension, and
supporting means therefor including a mount
ing and separate supporting devices for the
mounting located at spaced points circumferen
tially of the shaft, said supporting devices being
in the form of elastics tending to centralize the
container secured at their lower ends to said
mounting'and at their upper ends fastened in
place to permit the elastics to expand or con
tract in accordance with the weight of the con
tainer, shaft and motor when the latter are
in vertical position de?ned by the axis of the
shaft in its normal "position, and laterally ?ex
when the container, shaft and motor tend to dis
place laterally or tilt.
10. In a centrifugal'machine, instrumentalities
and separate longitudinally stretchable and lat—
erally ?exible supporting devices for said mount
ing located at spaced points circumferentially of
for facilitating the drying of clothes, comprising
the shaft and in a zone intermediate the con
tion of .the container including a driven shaft
connected with the latter and a motor for driv
tainer and the motor whereby the latter may con
stitute a counterbalancing medium at a point
substantially below the supporting devices, said
70 devices being attached to said mounting and to
said frame , whereby said devices intermediate
their points of attachment to the mounting and
frame stretch or contract endwise and in direc
tions diagonally of the axis of the shaft when in
75 its normal position, in keeping with shifting and
40
a tub, a rotatable clothes container located with
in the tub formed to permit the discharge of
water therefrom, means for effecting rapid rota
ing the shaft supported therewith and with the
container in substantially free suspension, and
supporting means therefor including a mounting 70
and separate'supporting devices for the mount
ing located at spaced points circumferentially
of vthe shaft, said supporting devices being in the
~ form of elastics tending to centralize the con
tainer secured at their lower ends to said mount 75
2,180,160
5
ing and at their upper ends fastened in place tainer, shaft and motor tend to displace laterally
to permit the elastics to expand or contract in or tilt, in combination with other means below'
accordance with the weight of the container, said elastics and supplemental to the motor for
' shaft and motor when the latter are in vertical ' exerting additional centralizing in?nence on the
position de?ned by the axis of the shaft in its container, shaft and motor.
.
5
normal position, and laterally ?ex when the con
ALBERT SCHELLENBERG.
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