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@d- 3, 1946-
' c. HUSSMAN
2,408,856
VIBRATION ABSORBING SUPPORT
Filed May 18, 1944
INVENTOR.
CARL HUSJ'NA/V
BY
SM I
171/5,
Patented Oct. 8, 1946
2,408,856
UNITED STATES PATENT OFFICE
2,408,856
VIBRATION ABSORBING SUPPORT
Carl Hussman, Chicago, Ill.
Application May 18, 1944, Serial No. 536,075
3 Claims.
This invention relates to improvements in vibra
tion absorbing supports for machines.
Fibrous cushioning material, such as felt, has
been employed beneath machines for absorbing
vibrations and noises incident to the operation
of the machines, but such ?brous sheet material
generally has been laid ?at upon a supporting
surface and being quite readily compressible and
of a limited resilience, has soon become highly
(Cl. 248-22)
2
base of the improved anti-vibration or vibration
absorbing structure, the plate having similar end
?anges I l and i2 which may be integral with the
plate or secured thereto by any approved means.
In the particular form of support shown in the
drawing a stabilizing bar or rib i3 is shown ex
tending parallel to the ?anges H and I2 and
disposed midway between the same. In the par
ticular embodiment of the improvements illus
ensi?ed under the imposed loads. The densi? 10 trated, two strips M of vibration absorbing mate
cation of felt or like material beyond its elastic
rial such as felt are disposed between the ?ange
limit, or to an extent where it cannot further
H and the stabilizer strip 13 and two similar
be compressed freely and will not readily spring
strips M- are disposed between the ?ange l2 and
back when relieved of compressive forces, impairs
stabilizer l3. Each of the strips [4 is ?exed or
or destroys its vibration absorbing characteristics.
folded longitudinally to an inverted U-shape, as
The degree of densi?cation of felt under a given
viewed in end elevation, to provide legs l5 and
load is reduced by increasing the thickness of the
an integral connecting arch portion l5, which is
felt, but adequately to cushion some machines by
initially bowed upwardly, as shown in Figure 1.
practices heretofore employed, would require a
Between the pair of legs of each strip, is positioned
thickness of felt such as would render the use 20 a spacer member I‘! upon the base l6, the mem- .
of such material prohibitiva.
bers I‘! being coextensive in length with the strips
One object of the present invention is to pro
M for retaining the legs of the strips against
vide a vibration absorbing structure for machines
inward displacement from the vertical positions
comprising felt strips or like ?brous material
shown.
whereby an effective thickness substantially
The adjacent legs of both the right and left
greater than the thickness of the felt sheet from
end pair of the strips illustrated in the drawing
which the strips are formed, as well as an added
are in abutting relation to provide mutual support
resilience imparted to the felt, are utilized in ab
against lateral displacement while the outer
sorbing vibrations from the machine, whereby
substantially less felt material need be employed
than is required by prior practices for effectually
damping mechanical vibrations and noises
incident to the operation of a given machine.
Another object of the invention is to provide an
improved vibration absorbing support for ma
chines comprising ?brous strips arranged for
edgewise compression under the imposed loads
and means cooperating with the strips for reduc
ing side sway during operation of the machines.
Further objects and advantages of the im 40
provements will be apparent from a consideration
of the following speci?cation and accompanying
legs of each pair throughout the substantial por
tion of the height thereof contact the stabilizer
bar or rib [3 as well as the ribs H and I2 respec
tively, which likewise cooperate to stabilize the
structure against side-sway and lateral displace?
ment.
'
The height of the legs l5 as shown in the draw
ing is substantially greater than the thickness
of the material from which the strips [4 are
formed, but due to the mutual support afforded
by the strips of each contacting pair and the
stabilizing eifect afforded by the ribs or stabilizer
members ll, I2, and [3, a structure is’provided
which
is suitably stable against lateral de?ection
drawing wherein:
or shifting in directions transversely of the strips.
Figure 1 is a side elevation of a vibration ab
The construction thus provides an effective depth
sorbing support for a machine illustrative of the
of felt corresponding to the height of the legs
present invention, a machine base or upper plate
l5 which may be substantially greater than the
of the support being shown out of supported rela
thickness of a sheet material of which the strips
tion;
are formed. For any given installation, the length
Fig. 2 is a similar view illustrating the struc
and height of the strips and the number thereof,
ture with the upper plate or machine base in sup 50 and the thickness of the material employed may
ported position;
be varied as required for adequate support of
Fig. 3 is a top plan view of the structure shown
the load to avoid densi?cation or compression of
in Fig. 2, with the top plate or machine base
the legs to the extent that they lose their resilience
removed.
~~
and their capacity e?‘ectually to absorb vibrations
In the drawing, 10 indicates a bottom plate or 55 that tend to pass from the machine base or top
2,408,856
4
1. A vibration absorbing structure comprising
a pair of spaced apart upper and lower plates,
said lower plate being provided with spacer mem
plate 18 to the base plate Ill. The interposition
of the felt strips between the plate in and the
top plate or machine base [8 provides a poor
vibration transmitting medium therebetween and
prevents physical contact of one plate with the
bers on the upper surface thereof, upstanding
stabilizer members on the lower plate disposed
parallel with said spacer members, depending
parallel stabilizer members on said upper plate
each arranged in the respective vertical plane of
other for isolating the vibrations transmitted from
the machine to the plate [8, and prevents trans
mission of the same to the plate In and thence
one of said upstanding stabilizer members on the
to the floor or foundation upon which the latter
10 lower plate, and a plurality of flexible inverted
rests and to which it is secured.
U-shaped vibration absorbing strips each having
When the machine to be supported (which is
vertical legs resting on said lower plate on op
represented in Fig. 2 of the drawing by the ref‘
posite sides of one of said spacer members and
erence character M) is placed upon the insulate
each strip contacting at one vertical side of one
ing structure, the bowed or arched portions l6
of the strips are ?attened an extent depending 15 leg thereof one of said stabilizer members of each
plate and at the opposite vertical side having
upon the imposed load, as, for example, to the
mutual supporting contact with an adjacent side
horizontal relation shown‘in
The" strips
of another of said strips, said strips supporting
being bent initially to the arched form shown in
said upper plate at an elevation above the lower
Fig. 1 are thereby placed under stress along their’
plate to preclude contact of the upper stabilizing
intermediate portions and the resistance to down 20 members
with the respective lower stabilizing
ward de?ection of said portions is thereby ing
members when said upper plate is subjected to
creased. This added resilience, that is, the re’
the influence‘ of a vibration generating load sup
action of the arches to ?attening, exerts an up-'
ported by said upper plate.
ward component against the base 13 and adds
2. A vibration absorbing structure comprising
substantially to the cushioning characteristics of
a
pair
of upper and lower plates, said lower plate
the structure and improves its vibration insulat
being provided with spaced apart upstanding
ing properties.
The plate or base i8 is shown provided with
an intermediate depending stabilizing flange [9
and stabilizing end ?anges 20 corresponding gen
erally in function to the stabilization ribs ll, 12,
and 13 but spaced adequately therefrom in a ver
tical direction to avoid physical contact therewith.
The members I9 and 20 con?ne the upper ends of
the strips against lateral separation and prevent
displacement of the plate i8 whereby the entire
parallel stabilizer members extending longitudi
nally of the plate, said upper plate being pro
30 vided with depending parallel stabilizer members
load upon the plate I8 is distributed over the total
area of the upper surfaces of the strips and is
transmitted uniformly by the‘ latter to‘ the legs 15,
which are of sufficient height and thickness to re 40
sist densi?cation to the‘ point where they cannot
further be compressed when subjected to the vi
brations' incident to the operation of the machine;
An effectually stabilized and effective vibration
isolating structure is thus provided by the im- ‘
proved construction, which utilizes the cushion
ing capacity of all the felt employed by reason
of which the quantity thereof may be substan
tially less than where felt is employed in hori
zontal sheets.
The term “felt” is employed generically to
designate sheets of material of sound‘ and vibra
tion absorbing or cushioning characteristics and
may be of wool, fur, hair, or of other appropriate
flber's, although non-?brous sheets" of resilient '
material may be employed to advantage in ac‘
cordance with the present improvements.
For the purpose of positively‘r preventing‘ creep
ing of the base I8 in the direction of the strips
16, the base may have depending flanges (riot
shown) along the unflang'ed edges‘ thereof simi
lar to ?anges 20 or‘ similar to ?anges II‘ and IQ
of base H), which latter likewise may be provided
with similar flanges along the unfl'an'ged edges
thereof, if desiredY
While an embodiment of the improvements has
been shown and. described for‘ illustrative‘ pur
poses, variations in the‘p‘a‘rticulari structure illus
trated may be utilized without departing from
the spirit of the invention.
I claim:
»
each disposed in the vertical plane of one oi
said stabilizer members on the lower plate, and
a group of longitudinally disposed vibration ab
sorbing members in parallel relation on said lower
plate each provided with a pair of parallel legs
contacting one of said plates and having an
initially bowed portion integral with said legs
and contacting said other plate, said upper and
lower stabilizer members laterally embracing the
respective upper and lower‘ portions of certain of
said absorbing members for con?ning each meni
ber in lateral contact with an adjacent member
and cooperating with said confined absorbing
members to inhibit side-sway of the structure,
said' vibration absorbing members being of suffi
cient height to preclude contact of the upper
and lower stabilizefmer'ribefs under the influence
of a vibration generating load supported by the
upper‘ plate‘.
3‘. A vibration absorbing structure comprising
a pair of upper and lower plates, said lower plates
having a pair of spaced apart‘ parallel upstand
ing stabilizer‘ ?anges, said upper plate being pfo—
vi'de'd with a pair of depending parallel‘ stabilizer
flanges ea'cli disposed‘ in the planev of one of said
lower ?anges, and a group of vibration absorbing
members each comprising a pair of vertical legs
t'egral‘
contacting
with one
said‘oflegs’
saidcontacting
plates and
thea other
portion
plate,
said vibration absorbing‘ members being tele
scopic'ally received between said senses of the
upper and lower plates arid being confined by
said ?anges in mutually contacting relation vfor
inhibiting‘ side-sway of the structure, said legs
having a vertical‘ height and resistance‘ to coin
pressioi‘i such as to preclude-contact‘ of the flanges
of the‘ upper plate with the respective flanges of
the lower plate under the influence of a vibration
generating load sapp'ort'ed'by' said‘ upper plate.
CARL
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