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Патент USA US3021966

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Feb. 20, 1962
J. BOCHAN
3,021,956
VIBRATION ISOLATING SYSTEM
Filed J‘an. 28, 1960
2 Sheets-Sheet 1
v
i
'°
FIQI
INVENTOR.
JOHN
BOCHAN
wild/0M
ms‘ ATTORNEY
Feb. 20, 1962
3,021,956
J. BOCHAN
VIBRATION ISOLATING SYSTEM
Filed Jan. 28, 1960
2 Sheets-Sheet 2
‘
INVENTOR.
J'OHN 'BOCHAN
2.3
WM 00%
l-IIS
ATTORNEY
3,021,956
United States Patent Office
PatentedFeb. 20, 1962
1
2
I which are movable‘ relative to each other as opposed to
3,021,956
VIBRATION ISOLATING SYSTEM
John Bochan, Louisville, Ky., assignor to General
Electric Company, a corporation of New York
Filed Jan. 28, 1960, Ser. No. 5,259
11 Claims. (Cl. 210-364)
the more conventional type of system wherein there is‘
actual deformation of ?exible parts, and in which all de
grees of freedom of movement are provided save for ver
tical motion which is substantially restrained.
In one aspect of my invention, I provide an apparatus
which includes a moving system together with a rigid
This invention relates to vibration isolating systems,
frame provided for supporting'themoving system with
out receiving vibrations therefrom. 'Asuspension system
and more particularly to a suspension system for isolat
ing vibrations of a moving system from the frame on 10 for securing the moving system on the frame includes a
pair of elongated members formed so as to be substan—
which it is supported.
tially rigid in tension and respectively positioned on dia
The problem of isolating vibrations of the moving parts
metrically opposite sides of the moving system. Each
of a machine from the stationary parts thereof has long
elongated member has one end secured in swiveling rela—
been recognized and many solutions have been proposed
therefor. While many of the systems which have been 15 tion to the frame and is positioned to extend down from
, that end; the length of each of the elongated members is
evolved have been satisfactory, it has been found most
such as to cause the lower end of the member to be above
difficult to provide an arrangement which, together with
the center of gravity of the moving system.
the elimination of undesirable vibrations in the supporting
The lower end of each elongated member is secured to
framework of the apparatus, is also economical while at
the same time restricting the vibrational movement of the 20 a joining member in swiveling relation thereto, and each
of the two joining members is pivotally connected to the
apparatus to a reasonable extent. In addition, it fre
moving system, the connections of the two joining mem
quently occurs that the moving parts of such apparatus
bers being on opposite sides of the system. The joining
must often be allowed only a certain number of degrees
members are themselves, in turn, joined by connecting
of freedom, and there is thus the problem of absorbing
the vibrations between the moving system and the frame 25 means which extend from one joining member to the other
under the moving system. The elongated members, they
while retaining the motion of the moving system Within
the predetermined limits.
As an example of the problems encountered along this
line, most automatic Washing machines of the type pres
joining members, the connecting means, and the center
of gravity of the moving system all have the common
characteristic that they lie substantially in the same single
tions does not have its weight symmetrically distributed
each elongated member to the frameand to the joining
members respectively,-it is a relatively simple matter,
ently commercially available for domestic use provide a 30 vertical plane.
With this arrangement, there is provided a suspension
clothes basket in which the clothes are washed and rinsed,
arrangement wherein the moving system is relatively free
and when it is desired to remove the liquid from the
to move in all directions except vertically, and in that di
clothes the basket is rotated at a high speed so as to cen
rection it is substantially restrained from movement.
trifuge the liquid out of the clothes. Very often, the
system for effecting the washing and centrifuging opera 35 Because of the swiveling relationship of the two ends of
about the axis of rotation so that there is inherently an
unbalance in the system. In addition, the clothes which
are being laundered most often will not distribute them
where so desired, to include damping means at those
points so that other external damping means may be elimi
selves perfectly about the inner surface of the cylindrical 40 nated; this is a substantial advantage provided by the
wall of the basket but will provide an additional degree of
unbalance. There is the further consideration that vibra—
tion-caused motion of the movingsystem must be main
invention in that the damping means are more economi
cal to provide in this manner and actually operate more
effectively.
7
The arrangement of the various members of the sus
the supporting frame or cabinet of the machine must be 45 pension system causes vibrations of the moving system to
be translated into movement of the different parts of the
small enough to be commercially attractive for home
suspension system relative to each other. This has not
usage. Yet a ‘further item for consideration is that ver
only been found to be a highly economical and operable
tical axis washing machines, that is, washing machines of
structure, but in addition it has been found that a' great
the type with a basket, open at its top and reached through
a lid in the top of the machine, generally should have a 50 part of the vibrations which may originate in the mov
ing system are prevented from reaching the stationary».
highly limited amount of vertical freedom, both for prop
er functioning of the apparatus itself and again because of ' supporting frame.
The features of the invention which I believe to be
the restrictions on size inherent‘ in an appliance which is
novel are set forth with particularity; in the appended
to be used in the space normally available in most homes.
It is therefore an object of the invention to provide an 55 claims. The invention itself however, both as to organi
tained within reasonable limits, usually on the basis that
improved system which will be simple in structure and
economical to manufacture, yet which will effectively pre
vent the vibrations of the moving system from reaching
the stationary parts of the apparatus in which the moving
system is included.
60
As a further object, directed toward apparatus having a
particular type of moving system, it is an object of the in
zation and method of operation, together with further
objects and advantages thereof, may best be understood
by reference to the following detailed description taken
in connection with the accompanying drawings.
In the drawings, FIGURE 1 is a view in perspective,
partly broken away and partly in cross section to show
details, of a ?rst embodiment of my invention as used in
a vertical axis washing machine;
‘FIGURE 2 is a side elevational view of the machine
signed to centrifuge.
_.
65 of FIGURE 1, also partly broken away and partly in
As a further object, directed toward an even more
cross section to show details;
speci?c structure, I provide by my invention an improved
FIGURE 3 is a view in perspective, partly broken
vention to provide an improved vibration eliminating sus
pension system for apparatus including components de
vibration isolating suspension system for vertical axis
away and partly in cross section to show details, of a sec
ond embodiment of my invention which, for the sake of
A more speci?c object of the invention is to provide a 70 illustration, is embodied in a different type of vertical
vibration isolating suspension system wherein the suspen
. axis washing machine; and
sion is provided by a number of relatively rigid members
FIGURE 4 is a side elevational view, partly broken
washing machines.
.
'
3,021,956
4
away and partly in cross section, of the machine of
FIGURE 3.
Referring now to FIGURES 1 and 2. of the drawings,
I have shown therein an agitator-type vertical axis wash
ing machine 1 having a clothes basket 2 which is provided
over its entire side wall with perforations 3 and which is
disposed within an outer imperforate tub or casing 4.
Tub 4 is mounted within a frame or appearance cabinet
5 which includes a base 6, vertically extending walls 7
mission assembly suitable for use in the illustrated ma
chine.
Additional structural features which may be noted for
a more complete understanding of the general driving ar
rangement provided in the washing machine of FIGURES
1 and 2 include a direct ?exible drive 26 from motor 22
to pump 21, and a suitable counterweight 27 which, as
shown in FIGURE '1, is positioned on the opposite side
of the rotational axis of the basket 2 from the motor 22
and a top portion 8. ' In addition, the appearance cabinet 10 so that, while there is necessarily some small unbalance
may be completed by a separate section 9 seated on top
of portion 8 and which in turn supports a control panel
10 provided with appropriate controls such as 11.
Tub 4 is secured to appearance cabinet 5 by any ap
propriate means such as, for instance, metal straps 12 15
which are secured at one end to portion 8 of the frame
and at the other end to the side wall of tub 4. Thus, in
eifect, the tub forms part of the stationary portion of
machine 1, being rigidly secured to the stationary appear
ance cabinet 5.
resulting from the unsymmetrical structure of the driving
system, it is held to a minimum. A further structural
feature to be noted is the provision of a ?exible boot
member 28 which is secured at its inner edge to the top
of the transmission 19 and at its outer edge to the tub 4.
This arrangement provides a water tight connection be
tween the transmission and the tub for retaining water in
the tub and basket while at the same time permitting the
relative motion betwen the tub and basket which results
The upper member 9 is provided with 20 from the fact that the basket is part of the suspended
operating system of the machine (as will be more fully
described herebelow) and the tub is secured to the station
a suitable lid 13 which may be opened so as to provide
ready access to the basket 2 for insertion and withdrawal
of clothes.
At the center of basket 2 there is provided a vertical
ary frame or appearance cabinet of the machine.
plurality of suitably formed vanes 16. The agitator is
further provided with an outwardly and downwardly
t-ail relating to the drive, and does not show at all the
It will be understood that, while the description of the
axis agitator 14 which includes a center post '15 and a 25 machine thus far excludes any substantial amount of de
valves and the particular controls normally provided on
?ared skirt 17 to which the vanes are joined at their
modern domestic washing machines, the elimination and
lower ends. Both the clothes basket 2 and the agitator
simpli?cation of these items are primarily for the purpose
14 are rotatably mounted. As indicated in FIGURE 2, 30 of permitting a clear explanation of the inventive concept
the basket is secured to a rotatable member 18 extending
set forth below. In addition, it will readily be recognized
up from within a transmission 19, and the agitator is
that the omitted details are conventional items in virtual
mounted on a shaft (not shown) which extends upwardly
ly all domestic washing machines, whose structure and
from transmission 19 through member‘ 18, and is joined 35 positioning is well known to those skilled in the art.
to center post 15 of agitator 14 by any suitable means
As previously described, basket 2 is rotated at high
(not shown). During a typical cycle of operation of
speed to effect centrifugal extraction of the liquid from
machine 1 liquid is introduced through an inlet 20 (FIG,
the clothes in the basket. As has also previously been
URE '1); then the agitator is oscillated back and forth
mentioned, the structure of the machine itself and the ar
within basket 2 to wash the clothes. After a predeter 40 rangement of the clothes in the basket both tend to provide
mined period of this washing action, basket 2 is rotated
at a high speed to extract centrifugally the washing liquid
from the clothes, the liquid passing through perforations
unbalancing forces which, during high speed rotation,
cause vibration-inducing forces. These forces tend to re
sult in gyrations of the moving system which, includes the
basket, agitator, transmission, motor and counterweight.
3 into the outer tub 4 and thence being removed by a
suitable pump 21 to a drain. Following this extraction
It is important that the vibrations caused by the unbalance
oscillated.
wise the machine will have a tendency to move about on
operation, a supply of clean liquid is then introduced into 45 forces be prevented from reaching the frame, that is, the
the basket for rinsing the clothes as the agitator is again
appearance cabinet, in any substantial amount since other
Finally, the basket is once more rotated at
the ?oor on which it is located and in fact might well be
high speed to extract the rinse water and discharge it
damaged by such vibrations.
from the clothes so that it may be removed by pump 21.
The suspension system includes a pair of elongated
Basket 2 and agitator 14 may be driven by any suit 50
members 29 and 30, located on directly opposite sides of
able means, as the drive means form no part of the present
the moving system, which must have the characteristic
invention. However, by way of example, I have shown
of being substantially rigid in tension. As shown in FIG
them as driven from a reversible motor 22 which drives
the basket and agitator through a drive including a clutch 55 URE 1, in the preferred embodiment of the invention these
elongated members are in the form of metal rods. Each
23 mounted on the motor shaft. Clutch 23 allows the
of the members 29 terminates at its upper end in a sub
motor to start without load and then picks up the load
stantially hemispherical portion 30 and at its lower end in
as ‘it comes up' to speed. A suitable belt 24 transmits
power to the transmission assembly 20 through pulley 25.
Thus, depending upon the direction of motor rotation,
pulley 25' of transmission 19 is driven in opposite direc
a substantially hemispherical portion 31.
Portion 30
tions.
Transmission 19 is so arranged that it supports and
drives both the agitator drive shaft and the basket mount
seats in a hemispherical recess 32 ‘formed in portion 8 of
the frame while end 31 of each member seats in a cup
shaped recess 33 formed in the end of a joining member
34. Thus, each end of a member 29 forms with the recess
in which it is received a universal, orv ball and socket,
within the basket 2. Conversely, when the motor 22
is driven in the opposite direction, the transmission drives
the wash basket 2 and the agitator “together at high
speed for centrifugal extraction. While the drive means
forms no part of the present invention, reference is made
connect with members 34 respectively above the center
of gravity of the moving system (shown in FIGURE 2
by the letters “C.G.”).
There are two joining members, 34, each associated with
one of the elongated members 29. Each joining member
to Patent 2,844,225 issued on July 22, 1958 to James
34 is connected to the moving system by a pair of arms
35 which pivot on a normaly horizontal pin 36 secured
ing member 18. When motor 22 is rotated in one direct 65 joint permitting swiveling motion of the member 29. The
length of members 29 is such that their lower ends 31
tion the transmission causes the agitator 14 to oscillate
R. Hubbard et a1. and owned by, the General Electric
Company, assignee of the present invention. That patent
between lugs 37 extending from transmission 19. Thus,
discloses in detail the structural characteristics of a trans
each member 34 is pivotable in a substantially vertical
3,021,956
5
6
plane when the moving system is at rest. As shown, one
preferred structure is the provision of a semi-cylindrical
section 370 at the end of each arm 35; the direction of
the forces in the system retains the different parts in opera
tive relation, while the open nature of sections 37a facili 5
tates assembly and disassembly.
The bottom end 38 of each joining member is pivotally
With the rocking and pendulous vibratorymotions of
the moving system thus accommodated, ‘the only forces
which can be transmitted to the frame 5 and to the ?oor
are vertical forces which have very little harmful effect.
By far the greater part of the vibrational force of the
moving system is absorbed by the suspension system de
scribed and is therefore prevented from being transmitted
connected by a pin 39 to a linking member 40 which, as
shown, thereby extends beneath the moving system so as
to frame 5 and to ‘the ?oor on which the machine 1 rests.
In ‘operation, the moving system of machine 1 is con
to connect the two joining members. Preferably, as 10 structed to have relatively low critical or resonant speeds
shown, the connecting means is in the form of a link 40
both for static and dynamic unbalances. At the dynamic
which has the same characteristic as the other parts of
unbalance resonant speed, the transmitted dynamic
the system that it is substantially rigid in tension. Also,
frame-vibrating forcesare at a peak. Since vibrational.
it has been found that a desirable feature is designing the
forces at the critical speed increase approximately with
suspension system of my invention is to keep the junction 15 the square of that speed, it is highly desirable, in order
of the lower end 38 of the joining member 34 with link 40
to keep these forces relatively small, that a low critical
speed be provided by proper design of the machine. The
directly below the pivoting junction of the member 34
with the moving system, i.e., preferably pin 39 is directly
design of machines to provide a low static unbalance
‘resonant speed is well known. However, substantial
and the center of gravity of the moving system all lie 20 dif?culty has been encountered in the design of a system
substantially in the same vertical plane when the moving
which will also have the desired low dynamic unbalance
system is at rest.
resonant speed. The suspension system described has
The unbalance forces operating on the moving system
been found very helpful in this respect in that, by virtue
when basket 2 is spinning at a relatively high speed cause,
of the fact that it is formed of rigid members which do
basically, two types of vibration motion with my improved 25 not stretch under tension it readily permits a low critical
suspension system. First, there is a generally pendulous
speed design to be obtained for both types of unbalance.
motion of the system which may occur either in the vertical
It will, of course, ‘be recognized that the extent of
plane of the system itself or in some other vertical plane.
motion of the moving system as it passes through the
If the pendulous motion is in a plane at right angles to
critical speeds may be such as to require damping, par
the plane of the suspension, the motion is achieved by 30 ticularly in cases Where the system proceeds relatively
a swinging of the movingsystem and joining members
slowly through the critical speed and the vibrational
between the two elongated members 29. Pendulous mo
forces have a ‘consequently longer time to operate. While
tion in the vertical plane of the suspension system‘ causes
damping may possibly be omitted in some instances where
the elongated members to swivel relative to the frame at
a high torque power source is available to push the sys
their tops and relative to the joining members at their 35 tem through critical speed quickly, it is not normally
bottoms, and causes a pivoting action of the joining mem
economically or practically feasible to provide such a
bers where' they are secured to the moving system. Of
source for domestic washing machines; as brie?y de
course, pendulousmotion between these two extremes be
scribed above, a more conventional procedure is to pro
below pin 36. The members 29, members 34, link 40,
comes a combination of the two types of movement.
vide a relatively small motor with clutch means for pre
Since the center of gravity of the moving system is below
venting sudden large torque requirements. As a result,
the level where the joining members 34 are swivelingly
it is desirable in the machine described to provide suit
connected tov the elongated members 29, the system is
able damping means. The system described lends itself
gravity centered and is stable, substantially in the manner
particularly well to the provision of highly effective damp
that a shopping bag whose center of gravity is below the
ing means by permitting‘recesses 32 and 33 in which the
level at which the handles at the top of the bag arecon 45 ends of members 29 are positioned to be provided with
damping surfaces 41 and 42 respectively. The provision
nected thereto is stable when the bag is held by the
handles and swung.
,
of the damping surfaces in the ball and socket type joints
The second type of motion which may occur is a rock
provided at each end of the members 29 means that, re
ing motion which occurs about a point: one side of the
gardless of the type of motion provided, there will be
moving system tends to rise while at the same time the 50 suitable damping therefor. In addition, sections ‘37a
may be provided with damping surfaces to provide addi
tional damping when pivoting of the joining member 34
relative to the moving system takes place. It Iwill readily
other side of the system tends to fall. When this motion
occurs in the vertical plane of the suspension system,
it is achieved by the pivoting action of, the joining mem
bers relative to the moving system. In the other direction,
that is, in a plane which is at right angles to the ?rst
be seen that as the moving system goes through its vi
bration or unbalance caused motion, the surfaces of the
hemispherical ends of rods 29 will rub against the damp
vertical plane, the rocking motion of the moving system
is taken care of by the swiveling relation of the junction be
tween the members 29 and 34 respectively.‘ As with
the pendulous motion, the rocking motion is normallyv a
ing material in the recessed seats 32 and 33 andv that, as
the joining member 34 pivots relative to the moving sys
tem, damping will occur. because of the presence of damp
combination of the two types described. ‘
60 ing material 43. Thus damping is provided for all mo
tions allowed by the system.
It will thus be seen that in elfect the moving system
It -will be seen from the foregoing thatv a highly effec
accommodates both pendulous and rocking motion in all
vertical planes. Almost invariably there is a combination
tive and yet simple and economical suspension system is
provided by my invention whereby a major part of the
of the rocking and pendulous motions. However, their
causes can, to some extent, be separated by» stating that
single‘ plane unbalances (commonly called static unbal
ances) causev a predominantly pendulous motion, whereas
65
the frame of the machine and consequently the base or
a couple (equal unbalances removed from each other
?oor on which the'machine stands. It vmust be noted
that an important characteristic of the system, which
circumferentially by .180“ and axially separated), also
known as a dynamic unbalance, causes a predominantly
rocking motion. While a couple is balanced in the static
sense, it presents a dynamic unbalance which heretofore
10'
must be present in order to achieve stability, is that for
all’ types and directions of motion the center of gravity
of the system must move upwardly from‘its position of
rest as it moves away from that position. The length
76
relation of pins 36>and 39 as described- are two factors
has proven to be one of the hardest to accommodate and
of members,” relative to the center of gravity, and the
isolate with a suspension system which also accommo
dates and isolates the more obvious static unbalances.
undesirable vibrations existing as a result of the opera
tion of the moving system are preventedfrom reaching
3,021,956
8
’ 7;
and 2; the single possible exception lies in the ready
feasibility of providing damping means at the top and
bottom of the elongated members 29 because of their
rigidity whereas this is not so readily possible in the em
(the ?rst one essential, the second one desirable)‘, in
achieving this important characteristic. It will, how
ever, be recognized that the presence or absence of the
characteristic in any suspension system of the type de
scribed may readily be ascertained by a kinematic analysis
of the given system.
bodiment'of FIGURES 3 and 4, and other more con
vcntional locations (not shown) in addition to the damp
ing material 53 may be desirable.
vAs in the embodiment of FIGURE 1, a most important
criterion of the construction is that during all types of
motion of the moving system’ it is important that move
‘
Referring now to FIGURES 3 and 4 of the drawings,
a second embodimentof my improved suspension system
is shown, ‘with like numerals being used to illustrate like
parts. One substantial difference between the ?rst struc
ture described and the structure of FIGURES 3 and 4
ment of the center ofg'ravity from its position of rest
is that, in the latter, tub, 4 is rigidly secured at its base to
the top of transmission 19 and is not secured to frame 5.
Thus, the tub is part of the moving system rather than
part of the stationary frame. As a result, since the tub
always be in an upward direction in all directions so as
to insure stability of the system. Again, it has been found
that, with the bottom 54of the joining members directly
under the pivoting axis 52, a desirable relationship of the
various parts is achieved, but it will further be unden
stood that the precise relationship of the bottom of the
has the same movement as motor 22, it is stationary with
respect thereto'and an ordinary shaft 44 may be used to
connect motor 22 to drain 21. In addition, the fact that
joining member to the remainder of the parts may be
the tub 4 moves ‘with the transmission 19 and basket 2
varied within limits and that various con?gurations may
means that the lower portion 45 of the tub may be rigidly 20 be provided: the primary stipulations are that all the
secured to the transmission rather than requiring, as in
parts of the system extend substantially in a vertical
FIGURES 1 and 2, a ?exible boot member.
plane passing through the center of gravity of the moving
Insofar as the suspension system is concerned, instead
system when it is at rest, andthat the movement of the
of the two rod members 659 of FIGURES 1 and 2 the
center of gravity always be in an upward direction from
embodiment of FIGURES 3 and 4 provides a pair of 25 its position of rest. As is clearly evident by the two dif
metallic cables 46 secured at their top ends 47 to the
ferent embodiments, various con?gurations within these
frame portion 8 on opposite sides‘ of the moving system
limitations are readily feasible.
Thus, while in accordance with the patent statutes I
bers 50. Each joining member 50 is pivotally connected
have described what at present are considered to be the
to the tub 4 of the moving system ‘by means of a pair of 30 preferred embodiments‘ of my invention, it will be obvious
ears 51 extending from the tub 4 and which support a
to those skilled in the art that various changes and modi
pin 52 on which the member 50 is mounted so as to
?cations may be made therein Without departing from
pivot in a substantially vertical plane when the moving
the invention, and I therefore aim in the appended claims
system is at rest. In addition, a suitable damping ma
to. cover‘ all such changes and modi?cations as fall within
and at their bottom ends 48 to ends 49 of joining mem
terial 53 may be provided in each pivot connection. At
their lower ends 54'the joining members are connected
35
the true spirit and scope of the invention.
What I claim as new and desire to secure by Letters
together by a cable member 55 which extends under
Patent of the Uni-ted States is:
'
the moving system of the machine as before.
1. A machine comprising: a moving system including
It will readily be seen that in the place of the rods 29,
driving means and means driven. at ‘high speed by said
cables 46 are provided and that the length of the cables 40 driving means; a rigid .frame provided for supporting
is such that their lower ends 4-8 are located above the
center of gravity of the moving system. Because of the
nature of cables, they are in effect mounted for swiveling
motion relative to the frame and to members 50 without
the need for ball and socket joints such as provided in
the embodiments of FIGURES 1 and 2. Also, secure
ment to the outside of the tub 4 is possible in the con
struction shown because of the fact that the tub in this
particular arrangement is included as part of the moving
system rather than part of the stationary frame.
_
A most important point in the inventive structure is
that the members which join the moving system to the
frame must be substantially rigid under tension; in this
connection cables 46 of FIGURE 3 stand in the same
stead as completely rigid members, such as rods v29. The
same is also true of the cable 55 which connects the, two
joining members, in that it is completely rigid in tension
in the same manner as link 40 of FIGURE '1. The em
bodiment of ‘FIGURES 3 and 4 helps to illustrate that,
in, the provision of the. described system which requires
members rigid in tension, ?exible members such ‘as cables
may be used.
_
In addition, it will be observed that a slightly di?erent
type of vertical axis washing machine is shown in FIG
URE 3 from the type shown in FIGURE 1, the primary
diiference being that in one type the outer imperforate
tub is part of the stationary frame whereas in the second
type it is part of the moving system. It will clearly be
understood, not only that either type may be used with
either of the embodiments of the suspension system, but
further that the two types of suspension system shown
may be used with many other types of apparatus having
moving parts.
I‘
__V
,
.The operation of the suspension system in FIGURE_3
sald moving system; and means for. supporting said mov
mg system on said frame comprising a pair of elongated
members formed to ‘be substantially rigid in tension re
spectively. positioned on opposite sides of said system,
each said elongated member having an upper end secured
to said frame in swiveling relation thereto and being posi
honed to extend down from said upper end, said. elongated
members-having a length causing their respective lower
ends to ‘be above the, center of gravity of‘ said system, a
pair of joining members each, having one end secured to
‘they lower end of one of said elongated members in swivel
mg relation thereto, said joining members being also
respectively connected to said system on opposite sidesv
thereof, said moving system being pivotally- mounted to
n said joining members for pivoting motion in the plane
formed by the lower ends of said elongated members. and
the. moving system center of gravity, ‘and connecting
means extending under said moving. system connecting
together the, other ends of said joining members; said
_ elongated members and the moving. system center of
gravity all lying substantially in a single vertical plane
when said system is at rest.
2. The apparatus de?ned'in claim lwherein said mov
ing system comprises centrifuging apparatus and‘ said
driven meansrotates in response to operation byv said
driving means.
-
-
" " V
'
3. The apparatus de?ned in claim 2 including damping
means between the top ofveach said elongated member
and said frameand between the bottom of each said
elongated member' and the joining member connected
thereto.
'
,
7
"
4. The apparatus de?ned in claim 1 wherein said
machine is a laundry machine and said moving system
is, the same as that of the embodiment of FIGURES l 75. were“. means. for. laundering clothes, said driven
3,021,956
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9
in swiveling relation thereto and being positioned to ex
tend down from said upper end, said elongated members
having a length causing their respective lower ends to be
above the center of gravity of said laundering means, a
pair of joining members each having one end secured to
the lower end of said elongated members in swiveling
relation thereto, said joining members being also con
means including a clothes ‘basket rotatable on a substan
tially vertical axis, said driving means including means
for rotating said basket at a centrifuging speed.
5. The apparatus de?ned in claim 4 wherein the lower
ends of said joining members are directly below the
pivotal connections of said joining members to said laun
dering means when said laundering means is at rest.
nected to said laundering means below said tub on oppo
6. The apparatus de?ned in claim 1 wherein said con
site sides of said laundering means, said laundering means
necting means is substantially rigid in tension.
7. A machine comprising: a moving system including 10 being pivotally mounted to said joining members for
1 pivoting motion in the plane formed by the lower ends
driving means and means driven at high speed by said
of said elongated members and the laundering means
driving means, a rigid frame provided for supporting said
center of gravity, and connecting means extending under
moving system; and means supporting said moving sys
said laundering means connecting together the other ends
tem on said frame comprising a pair of rigid rods respec
of said joining members; said elongated members and the
tively positioned on opposite sides of said system, a laundering means center of gravity a-ll lying substantially
universal joint securing ‘the upper end of each said elon
in a single vertical plane when said laundering means is
gated member to said frame in swiveling relation thereto,
at rest.
each said rod being positioned to extend down from said
11. A laundry machine having means for laundering
upper end, said elongated members having a length
clothes including a clothes basket rotatable on a sub
causing their respective lower ends to be above the center
stantially vertical axis, an imperforate tub surrounding
of gravity of said system, a pair of joining members, a
said basket, and drive means for causing high speed rota
universal joint connecting one end of each said joining
tion of said basket within said tub; a rigid frame for said
member to the lower end of one of said elongated mem
laundering means; and means supporting said laundering
bers in swiveling relation thereto, said joining members
means on said frame so as to prevent a substantial part
being also connected to said system on opposite sides
of any vibrations thereof from reaching said frame com
thereof, said moving system being pivotally mounted to
prising a pair of elongated members formed to be sub
said joining members for pivoting motion in the plane
stantially rigid in tension and respectively positioned on
formed by the lower ends of said elongated members and
opposite sides of said laundering means, each said elon
the moving system center of gravity, and connecting
gated member having an upper end secured to said frame
means extending under said moving system connecting
in swiveling relation thereto and being positioned to ex
together the other ends of said joining members; said
tend down from said upper end, said elongated members
elongated members and the moving system center of
having a length causing their respective lower ends to be
gravity all lying substantially in a single vertical plane
above the center of gravity of said laundering means, a
when said moving system is at rest.
pair of joining members each having one end secured to
8. The apparatus de?ned in claim 7 wherein said
the lower end of one of said elongated members in
machine is a laundry machine and said moving system
swiveling relation thereto, said joining members being
comprises means for laundering clothes, said driven
also respectively connected to said laundering means on
opposite sides thereof, said laundering means being pivot~
axis and said driving means including means for rotating
40 ally mounted to said joining members for pivoting motion
said basket at a centrifuging speed.
in the plane formed by the lower ends of said elongated
9. The apparatus de?ned in claim 8 wherein each of
members and the laundering means center of gravity, and
said universal joints includes damping means separating
connecting means extending under said laundering means
the relatively movable parts thereof.
and connecting together the other ends of said joining
10. A laundry machine having means for laundering
means including a clothes basket rotatable on a vertical
clothes including a clothes basket rotatable on a substan 45 members; said elongated members and the laundering
tially vertical axis and drive means for causing high speed
rotation of said basket; a rigid frame for said laundering
means including a stationary tub positioned in surround
ing relation to said basket; and means for supporting said
laundering means on said frame so as to prevent a sub
means center of gravity all lying substantially in a single
vertical plane when said laundering means is at rest.
References Cited in the ?le of this patent
50
stantial part of any vibrations thereof from reaching said
frame comprising a pair of elongated members formed
to be substantially rigid in tension and respectively posi
tioned on opposite sides of said basket, each said elon
gated member having an upper end secured to said frame Gil O!
UNITED STATES PATENTS
335,654
2,130,160
2,358,779
2,648,510
Taplin _______________ __ Feb. 9,
Shellenberg __________ .. Sept. 13,
Tholl ______________ _.. Sept. 26,
Henshaw ____________ __ Aug. 11,
1886
1938
1944
1953
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