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June 27, 1950
_Filed Nov. 23, 1944
Patented June 27, y1950
John H. Emerson, Cambridge, Mass. `
Application November 23, 1951-1,
': 564;"185v
5 claims.
(c1. 12s-~3sl- '
This invention relates to therapeutic vibrators
for the treatment of certain physical and/or
nervous' ailments, for instance extreme weariness,
insomnia-etc. Ithas been discovered that help
mattress. having they device of ‘the presentin
ven'tion operatively associated therevc'ith‘.4
Fig. 2l is.' a‘idia'gramlmatic 7'side "elevationv --of the'
partsxshownl-in Fig. 1, the. mattress being-’shown
fulv results may sometimes be obtained by caus
ing» the patient'. to sitor lie upon a support which
as restingA upon‘a Y conventional’ bedàspring-~.A
Fig. Slistafragmentary plan view- to alieni/ger-
is vibrate'd, usually at a -relatively high frequency,
scale of the device of the present inventionl re'
but with a low amplitude. Heretofore, so far
moved from the >bed.
as is known toy me,` the apparatus designed for
Fig. 4 is a side elevation of the device shown
this purpose has »been of cumbersome, complicated l (t ;in.Fig.
and expensive type so that it has not been readily
is a fragmentary side elevationof one
available to the majority of would-be users. For
device shown in Fig. 4 but to a larger
example, it has been proposed to incorporate in
thestru'cture vof a bed/mattress or spring,vof other
wise standard type, motor driven means for in
citing thedesired vibration. While these built-in
constructions `are' undoubtedly useful, they are
very expensive, so' that the number of such ap
pliances whichv are available even in large hos
pitals is -quite limited;` Thus‘it becomes necessary,
in Vmany cases, for a patient Who is to receive
the treatment to be moved from the ordinary bed
tothe‘speci'ally constructedbed designed for this
treatment; there is doubtless some ñre hazard
involvedïin the housing of a motor device within
the internal structure of the bed; the built-in
motor‘devic'e adds` substantially to the weight of
the-already heavy and somewhat cumbersome
springv or mattress, and the direction of the
vibrations Aimparted isñxed and invariable.
The present invention has for its principal
object the provision-'of' aV portable device'for set
ting up the desired vibrations in a bed- or vother
support; to provide vibration-inducing means of
simple and very inexpensive construction readily
movable from place to place; to provide vibration
inducing means which may be applied to any
scale and with certain parts in vertical section,
ii", Fig.. 6 is a fragmentary diagrammatic- section
illustrating another device for vibrating the
While herein, for convenience in description,
the improved device of the present inventioniis
shown in association with a bed spring andi/mat
tress, it is to be understood that it is likewise
applicable to other supporting structures, for
instance, to a couch, or to achair upon which the
patient to be treated may recline or be seated,
and herein when reference is made toa “cushion
element” or “pad,” such terms are to bel con
strued as broadly inclusive of a conventional bed
mattress, a chair cushion, pad, or other similar
soft and yielding support.
Referring to the drawings,.the numeral I desig
nates a conventional bed mattress here shown
as resting upon a bed spring 2. The vibration
imparting device of the present invention in
dicated generally at 3, in- Figs. 1, 3, and 4, is de
signed to have a major portion of its length lo
cated between the mattress and’spring. Depend
ing upon the treatment to be given, this device
may be inserted between the mattress and spring
either at the head end or foot end of the bed,
ordinary bed without substantially disturbing a
patient resting thereon; to provide such a device
wherein the motor means may be located outside 40 or at either side as may be desirable or con
of the bed and' bed coverings; to provide vibra
tion-inducing means which may readily be so ar
In the embodiment of the invention herein>
ranged as to cause the vibrations to travel longi
chosen for illustration, this vibration-imparting
device comprises an elongate panel 4, preferably
tudinally or transversely of the bed as may be
of uniformly thick sheet material, for instance,
preferred; to >provide a device of this kind which
über board or the like. The material of this
does not substantially decrease the comfort of
panel should be'stiff but somewhat resilient, and
the patient, and to provide such an arrangement
as illustrated, the panel is preferably substantially
which does not necessitate any modification of
longer than Wide. In a preferred construction,
the bed or bed structure in applying it for use.
Other. and further objects and advantages of 50 one or more slits 5 extend inwardly from one end
of this panel so as to divide this portion-of the
the invention will be pointed out in the following
panel into a plurality of fingers 6 capable of
more detailed description and by reference to the
being independently flexed.
accompanying'drawings in which
The other end portion 'l of the panel-is pref
,F151t is a diagrammatic planiïview of a bed 455
erably finished to have a smoothly round edge
8, and to one side of this end portion 'I of the
panel, there is ñxed the casing 9 of an electric
motor I0 of an inertia type vibrator. The shaft
II of this motor extends through a suitable aper
ture in the panel and has mounted on its free
end a weight I2.
This weight is eccentric so
that when the motor shaft is turned, vibration
impulses are set up in a direction substantially
perpendicular to the axis of the shaft, that is
10" wide is suitable for the purpose, the area of
said panel thus approximating one-thirteenth of
the area of a full-sized mattress and when slitted
to provide the fingers 6 at one end, the slits may
extend inwardly to a distance of the order of
To impart vibrations of the desired rapidity
and amplitude, it is found motor speeds of from
1700 to ‘3600" R. P. M. are effective, using a Weight
to say, in a direction parallel to the plane of 10 having an eccentricity of the order of -?‘g of an
inch. A Weight suitable for a purpose, driven at
the panel 4. Preferably, the eccentric weight I2
this speed and with this eccentricity may, for ex
is housed within a casing I3 secured to the op
ample, consist of a disk of metal of the order of
posite side of the panel from a motor casing 9.
one inch in diameter and 1%” in thickness.
Conveniently bolts Sa, Fig. 4, extend through
As above pointed out, these dimensions and
flanges of both casings 9 and I3 and through 15
rates of vibration are given merely by vvay of ex
suitable openings of the panel 4 so as to unite
ample of an acceptable practice and it is under
the several parts to form a unitary structure. A
stood that the invention is not in any sense to be
suitable ñexible conductor cable I4 leads into
regarded as limited to embodiment in appa
the motor casing to supply current for operating
ratus employing these particular dimensional re
the motor.
Preferably, one ‘surface ‘at least `of the panel
If desired, in order to lessen noise Whenthe
4 is roughened as indicated at I5 Fig; 3 or other
device contacts the bed spring,._a removable
Wise treated sov that when it is in contact Ywith
padded cover I9 (Fig. 4) may be provided.
the spring or cushion element, it frictionally en
While one `desirame embodiment has been 11- "
gages vthe latter so that vibrations imparted Vto 25
lustrated, it is to be understood that the invention
the panel are to be transmitted to the spring end
is not to be limited to the precise details here>
or cushion element.
. ,
disclosed but is to be regarded as broadly inclusive
In using this device, the slitted end portion
of-any and all equivalence thereof such as fall
of the panel 4 is introduced between the mattress
and the spring of the bed, the end 'I of the panel v30 Within the scope of the appended claims.
I claim:
being left projecting 'from beneath the mattress
1. A therapeutic vibrator comprising a thin,
and‘vbed .coverings ,and -When the motor is ener
stiiiiy resilient panel, comprising a portion> de
gized,jthe rotation of the eccentrically disposed
signed to underlie and to have frictional engage
Weight I2 creates vibrations in the motor casing
Which are’ transmitted directly to the panel 4. 35 ment with a cushion element resting upon a re
silient support, the panel being of such dimen
These vibrations act substantially in the plane of
sions that ,it does not substantially affect the .
the panel and in closed curved paths. Since the
normal contour of the upper surface of the cush
mattress restsjupon 'the upper surface of this
ion element when disposed beneath the latter, a
panel 4 and bears upon it with. some Weight and
particularly since the mattress vis supported re 40 motor casing mounted near one end of and sup
ported solely by the panel at that part of the ,
siliently by the bed spring, the vibrations .of the
latter which does not underlie the cushion ele
panel4 are frictionally transmitted to the mat
ment, a motor Within the casing, a second casing
tress and likewise to the spring, thus subjecting
arranged at the opposite side of the panel fromV
the patient lying upon the bed to vibration. .Such
the motor casing, the motor shaft extendingy
treatment, asabove pointed out is highly effective
through the panel and into the latter casing, and
in the alleviation of certain types of’illness, par
an eccentric mass on the shaft of the motor with
ticularly nervous and circulatory troubles.
in the latter casing, said eccentric mass revolv
-Instead of the rotary type of motor just sug
ing in a plane parallel to that of the panel, `the
gested, a vibratory typeçelectriczmotor may be
employed, for example,~as diagrammatically il 50 parts being so constructed and arranged that ac
tuation of the motor sets up rapid vibrations of
lustrated in Fig. 6. In this arrangement, the al
small amplitude in the panel and in the plane of .
ternating current >magnet I6 and a .resiliently
supported.v armature l'i of substantial mass are
the latter.
2. A portable device for vibrating a bed for
mounted on the panel in place of the motor Ill,
and preferably housed in_a case I8. Whensup 55 therapeutic purposes, said device comprising a
thin, stiii‘ly resilient, elongate panel designed to
plied with alternating orpulsating current, the
disposed between the spring and mattress and ¿
armature is vibrateii, thus lsetting up -substan
tially rectilinear vibrations inthe panel.
being freely adjustable to any desired position
when in use, said panel being divided by parallelr
Merely. by Way of illustration and Without anir
slits extending inwardly from one end to form a
intent thereby to limit- the invention, the follow 60
plurality of paralleh'individually flexible ñngers,
ing dimension-al details are suggested as having
and motor-driven,- vibration-creating ' means
been found to produce desirable and eifective re
on and supported by the opposite endv
sults. 'Thus the panel 4 may consist of hard, dense
portion of the panel.
nber board of la commercial type, usually laid
3. A portable device for vibrating a bed for
down> from pulp in a Fourdrinier machine and 65
therapeutic purposes, said Ydevice comprising a
then'Y highly compressed, such material usually
having at least one surface which is rough with a ,
texture more or less suggestive of a textile fabric.
Such said material, of the order of 1,/8” .thickness
is desirable for the purpose. Material of-this
thickness when introducedlbeneath the mattress
does not substantially aifect the contour of the
upper surface of the mattress, and its presence
stiiiiy resilient elongate panel approximately 1/8"
thick, of the order of 10” Wide, and of the order
of 30” long, and having a frictional surface, and
motor driven vibration-creating means -mounted
on and supported solely by the panel adjacent to
one end of the latter, the major portion 'of the
panel being designed to be inserted between the
bed spring and av conventional mattress while .
is» thus substantially'unnoticed by the occupant
ofthe bed.- , A‘panel of the order of 30" long and . it leaving the lmotor 'driven.‘ vibrationßcr'eating
means outside the bed, the vibration-creating
means being operative to set up vibrations in the
panel in the direction o! its length thereby solely
by friction to vibrate the mattress resting on
the panel.
4. A portable device for vibrating a bed for
therapeutic purposes, said device comprising a
tween the spring and mattress, and vibrating
means attached to one end of said panel and
located outwardly beyond the edge of the mat
tress when the vibrator is in use, said vibrating
means being supported solely by the panel and
being operative to impart rapid vibrations to the
panel and to the mattress in the plane thereof by
stitily resilient, elongate panel designed to be
frictional engagement between the panel and the
slid between the spring and mattress and being
freely adjustable to any desired position when 10
in use, said panel having one or more slits ex
tending inwardly from one of its ends thereby to
divide such end of the panel into a plurality of in
dependent ñngers, the slits extending inwardly
from the end of the panel a distance of the order 15
of 18" and the panel being oi' a total length of
the order of 30", and motor-driven, vibration
creating means mounted on the unslitted portion
of the panel.
5. A portable therapeutic vibrator designed and
arranged for ready application to and as ready 20
removal from a bed having a conventional spring
and mattress, said vibrator comprising a thin
panel of stiilly resilient material, the major por
tion of which, when the vibrator is in use. lies be
The following references are of record in the
ñle of this patent:
Wallman et al ..... __ June 7,
Seeber ____________ __ Sept. 1,
Duprey __________ __»- May 24,
Wahl ____________ __ Aug. 11,
Solinski __________ __ Oct. 3,
Whitney __________ __ Feb. 16,
'I'hompkins _______ __ Aug. 12,
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