US 2921790 A
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THERAPEUTIC APPARATUS 2 Sheets-Sheet 1 Filed Feb. ll, 1958 Y INVENTOR. fjVawcz/a/ B'YJO@ I y?" Jan. 19, 1960 J, NAWARA 2,921,790
THERAPEUTIC APPARATUS Filed Feb. 11, 1958 2 Sheets-Sheet 2 www3/95:22 1,77- %gg 0/ 13 I76 ,77
3 7 5 INVENTOR, Jojefawafaz, BY
United States Patent THERA'PEUTIC APPARATUS Jozef Nawara,'Chicago, Ill. Application February 11, 1958, Serial No. 714,565
3 Claims. (Cl. 272-58) The-present invention relates to therapeutic beds, and has for its main `object the provision of a teeter platform for supporting thereon-a patient in a recumbent position, withA a superstructure disposedabove the-platform,` the superstructure supportingv suitable mechanism, manually actuable by the patient, for the purpose of imparting to the platforma seesaw motion Aupon its Vpivot for thereby giving to the patient a -therapeutic exercise.
Another object of the Vpresent invention is the provision,A in connection with the superstructure, aforesaid, of adjustable means for supporting thereon various exercising devices for use of the patient while in a supine position upon the platform aforesaid.
A still further object of the present invention is the provision, in connection with each end of the platform aforesaid, of adjustable means for limiting 'the angular shifting movement of the platform in the direction of the oor upon which the device is supported.
A still further object of the present invention is the provision of suitable tensioning Vmeans for the platform aforesaid, normally tending to bring the platform to the horizontal position, during the operation of the means through which a seesaw motion tothe platform is imparted, said tensioning means adjacent each end of: the platform being capable of adjustment in order to relate the operation of said tensioning' meansY to the weight of a patient at each end of the platform.
A still further object of the present invention is to generally improve a therapeutic bed of the, character above indicated.
With the above general objects in view and others that will appear as the invention is better understood, the samev Consists in the novel construction, combination and arrangement of parts hereinafter more fully described,
illustrated in the accompanying drawings and pointed out in the appended claims.
In the drawingsv forming a part of this application, and in1 which like designating characters refer to corresponding parts throughout the several views:
Fig. l is a top elevational View of the present device;
Fig. 2 is a side elevational View thereof;
Fig. 3 is an end elevational view thereof;
Fig. 4 is an enlarged cross section on linev 4-4 of Fig. 2;
Fig. 5 is a top elevational view of the platform;
Fig. 6 is a cross sectional view through the shaft and its appurtenances, upon which the platform is pivotally supported;
Fig. 7 is a perspective end View of the said shaft;
Fig. 8 is a longitudinal cross sectional view, partly in elevation, through a pulley fixture for supporting thereon a cord or the like which in turn is capable of supporting exercisers of various types;
Fig. 9 is a top elevational view of the said fixture;
Fig. 10 is a longitudinal cross sectional view, partly in elevation, through the lower end of one of the legs supporting 'the superstructure and through a caster, illusr"ice tratingthe mechanism whereby 'the .caster is journalled within the leg, and further illustrating the braking mechanism for the caster;
Fig. 11 is a fragmentary cross sectional view through an edge of the platform, illustrating the mechanism for supporting a tubular bar in yan encompassing edge relation with the platform, for supporting upon said bar adjustable foot and head rests at the ends of the platform; and
Fig. 12 is a fragmentary cross sectional view 'through an edge of the platform, taken on line 12-7-12 of Fig. 5, illustrating vthe manner of afxing a cord'to each end of the platform, whereby auseesawmovement may be imparted to the platform.
v'Referring in detail-to the present drawings, there Yis shown therein platform 13, of a rectangular form,- for supporting rthereon ina longitudinal relation apatient while in arecumbent position. Supportedin an edge- .wise spaced relation with saidplatform 13 is a rectangular tubular frame, including the longer side barsv 14, andthe shorter end bars 14'.
,Said frame is supported in its operative position/with platform 13 by means of a pluralityof plates 15 aixed to the underface ofplatform 13 by means of a plurality of screwsV 16. The outer ends of'said plates 15 extend beyond the edge of platform 13, and are directed upwardly, and there terminate in spoon-likemembers 17, defining ,cradles withinwhichV they said frame rests and is there supported. Said members 17 may be welded or otherwise rigidly aixed to the said frame for maintaining the latter in a rigid spaced relation with the edge of platform 13, as is best seen in Fig. ll.
Supported in an adjustable relation at each end of Vplatform 13 isa foot and head rest for supporting feet andhead of the patient and for preventing sliding of the patientylongitudinally of platform v13 when the latter makes seesaw motions upon its pivot, as will be later described.l Each of said rests includes cushion 18 in a transverse relation with the platform, and disposed' to- 4ward the center thereof. Said cushion 18 is affixed to a stiff backing 19- (Fig. 3). Aiiixed to backing 19, in a longitudinal relation therewith, is a hinge loop 20, for reception therewithin ofthe central portion of the U- shapedbar21. Each stop, including said cushion 18 and backing 19, maybe angularly shifted upon said central portion of said U-shaped bar 21 for the purpose of selectively bringing cushion 18 to its vertical position with relation to platform 13,l or to a horizontal position. When in a vertical position cushion 18 and itsbackingfunction asa stop for the purpose already mentioned, and when in a horizontal position cushion 18 may be employed as a pillow fora patients head. Screw 22 passed through said hinge loop 20 bears against the said central portion of said U-shaped bar 21 forl maintaining cushion 18 in its rigid adjusted relation with said bar.
The ends ,of said U-shaped bar 21 are bent to define lateral extensions 23, and the latterarey vertically bent to define vertical extensions 24.
Means for supporting the said stops in an adjustable relation with platform 13 includes a pair of tubular members 25, a pair of which for each of said stops 18--19 is mounted upon side bars 14 for longitudinal sliding movement thereon. Each yof said tubular members, adjacent the end thereof which is proximate to the end of platform 13, is'provided with an adjusting screw 26,'passed through the body of each of said tubular members 25, and which is adapted to bear against said side bars 14 for maintaining saidv tubular members in their adjusted relation therewith. Formed at the opposite end of each of said tubular members 25 isfa vertical tubular member 27, within which said-vertical extensions 24 are receivable and wherein the latter may be adjusted vertically for 3 p bringing said stops 18-1-19 towards or away from said platform 13. Screw 28 passed through said vertical tubular members 27 are adapted to engage and bear against saidverticalextensions 24 .fonmaintainingthe .latter in Vtheirvertic'al adjusted relation with said vertical Vtubular members 27." Thus, Vsaid stops 18-19 are"ad justable longitudinally oftheplatform l13, depending upon the height of apatient, as -welly as Vin vertical relation K with said platform 13. v
' Vis at thenearest" proximity Vof said`pla'tform13,'.as`vbest' seen'in Fig. 2. Positioned uponV upper and side surfacesV of said beam 29, adjacent the ends thereof are sheathing plates 30, which are .fastened to said beam 29 by means of screw or like fastenings 31 (Fig. 3). Similar leg supporting plates 32, in contacting relation with theY inner edges of said sheathing plates 30, are mountedrupon said beam 29, and axed thereto by means of a plurality of screws 37.
On each side ,of beam 29, said plates 32 support a pair of legs, generally indicated by 34.in Fig 3. Each of said legs 34 includes an upper tubular portion 35, the upper ends of which are attened as at .36, and the flattened ends of each opposed pair of Asaid legs 34 in a transverse relation with said beam 29, are aixed'to said plates 32 and beam 29 by a plurality of bolts or like fasteners 33, passed transversely through said beam 29 and the ends of said plates 32, as is seen in Figs. 2 and 3. Insertable through the lower open` endof each of said tubular portions 35 is extensible lower leg portionV 38, the lower end of which terminates in a foot plate 39. Optionally, foot plates 39 may be substituted by casters, which Vwould permit easy traction for therplatfrorm upon the floor.
Said legV portions 38, being telescopically receivable within the upper leg portions k35 may be extended or shortened for the purpose of regulating the distance of platform 13'from the licor.V Screws 40 passed through said upper tubular portions 35 bear against said extensible lower leg portions 38 for maintaining the latte). Vin their adjusted extended relation. Y Y
Welded, as at 41, or otherwise rigidly aixed to the upper bow portion of each of said sheathing plates 30 is a cylindrical bearing`42, the outer end of which is closed by the end plate 43. Each end plate 43 is provided with a diametric slot forreceiving therewithin tongue 44 made in each end of shaft 45 (Figs. 6 yand 7).
Positioned upon said shaft 45 in an encompassing relation, and disposed between the inner ends of said cylindrical bearings 42 is a Vtubular hinge Ymember 46, which is welded, as at 47 (Fig. 2), or otherwise rigidlyaxed to the underface of platformf13. Y Y Y Due to the arrangement hereinabove describedit will be Vclear that bearings 4,2, beingV rigidlyV ajixed to the sheathing plates 3i),V and shaft45, being rigidly aflixed to said lbearings 42, through tongues 44, saidshaft`45 remains immovable. The tubular hinge member 46, being rigidly aflixed to platform 13, and being journalled around said shaft 45,7det`mes a pivot connection between platform 13 and said shaft 45, whereby said platform 13 is capable of making angular seesaw motion upon said shaft 45.
Rigidly afxedto the underface of platform 13, and downwardly depending therefrom is plate 48, which coacts with each leg 34; Said plate 48 is provided with a plurality of apertures 49 in Ya longitudinal relation with said plate 48 for selective reception within one of said apertures49 Yof the hooked end of coil spring 50. The
. 4 ing in a rigid relation with the upper tubular portion 35 of each leg 34.
The tension ofcoil springs 50 is capable of regulation. Greater degree of muscular power on the part of the patient reposing upon plat-form 13 to overcome the tension of springs'50 in order to induce the seesaw movement of platform 13 will be required when the upper ends of coil springs 50 zareV engaged at the outermost apertures 49 with relation to the center of platform 13 than would be required if the upper ends of springs 50 were engaged with apertures 49 at the proximate ends of plates 48 with relation to the center of platform 13.
Therefore, the capability of regulation of the tension in springs 50, and the correlation of the degree of tension in springs 50 with the patients muscular capacity to overcome the tension of springs 50 in order to induce the seesaw motion of platform 13, by means later described, is an important feature ofthe present invention. When however the tension in the four coil springs 50 is equal, that is when the upper ends of springsV 50 are engaged at the same apertured points 49 in all four plates 48, said coil springs 50 tend to urge platform 13 to its horizontal position, as is seen in Fig.'2. Of course, one pair of said coil springs 50, on one side of the center of platform 13 may be engaged with different apertures 49'than the remaining pair of said springs 50, at the opposite side of the center of platform 13 are engaged. Such an arrangement will require greater exertion by theY patients one arm, than by the other, in order to induce the seesaw motion to platform 13, all depending upon therapeutic requirements of any given patient.V Means are provided at each end of platform 13 to limit the downward shifting movement of the platform, or to support each end of the platform irnmovably upon the floor, in which latter event platform 13 may be used as an examining table or a table on which a massage -mayy be given to a patient. Said means include a pair of hollowed stud members 52, affixed to the underface of platform 13, one adjacent each edge of platform 13, and each pair thereof in a transverse relation with the platform. T elescopically receivable within said stud members 52 are tubular extensible members 53, and a U-shaped member 54, receivable by its upright ends within a pair of transversely positioned tubular extensible members 53. Transverse Vscrews 55 passed through said stud members 52 engage said tubular extensible members 53 and maintain the latter intheir longitudinally adjusted position. Screws 56 passed through the lower ends of said tubular extensible members 53 are adapted to engage the upright ends of said U-shaped memberV 54 to maintain the latter in its adjusted relationwith said tubular extensible members 53.
As is obvious, said members 52, 53 and 54 may bev longitudinally adjusted with relation to each other for the purpose of bringing said U-shaped member 54 towards or away from the floor and thereby of limiting the downward shifting movement of each end of lower end of each coil spring S is provided 'with a hook platform V13 during the seesaw motion of the latter, depending upon the requirements of any given patient. When said members .52, 53 and 54 are fully extended so that both of said U-shaped members 54 are in contact with .the floor, said members will then provide a support for each end of platform 13, rendering the platform immovable with relation to the floor. In that latter position of the platformV fthe, same may be used as an examining table or a tableupon which =a massage may be given to the patient.
Referring lnow to the superstructure of the device the same includes a rectangular frame 57 disposed above platform 13, and supported upon the lloor by'means of four legs, generally Yindicate'dfin Fig. V2 by 58.k Each of said legs 58 includes an upper tubular member 59, having its upper end flattened as'at 60, which is Vsecured to the end of the shorter end portion' of Vframe.57, by means of rivet 61 or the like.Y Each tubular end member 59. hassecured thereto the lower end of brace 62', while ,theopposite end ,of each brace 62 is fastenedto .the longer vside Vbar of frame-57, adjacent its'end, by means of rivet 63 (Fig. 2), orany' suitable fastening means.
Each. pair of upper end tubular members59 isr conrnectedrby a pairof cross braces 64, best shown in Fig. 3. Byfmeans of said braces 62 and 64, as well as rivet connections 61, said upper tubular members 59are made rigid-with each other as well as with saidY frame 57.
,Receivable .within said upper end tubular members 59 of -.s,aid.,legs-58, `'through the lowerrends thereof, in a telescopio extensible relation are lower tubular members .65,provided with a plurality of mutually spaced trans- -verse apertures 66. A knobbedbolt 67 is passed through :the lower end-ofeach said yupper end tubular member 59 ina transverse relation, and accommodated within anyV vselected aperture 66.
By means of said knobbed bolt 67 and said apertures 66-.said Ytubular vmembers65 may be held rigid in their extended relationwith said `upper end tubular members 59. .'I'hus, said legsA 58 ,may be made longer or shorter, ,thereby elevating or lowering frame 57 from or towards platform ,13, Ydepending upon requirements of any given Ipatient.
VEach leg 58 is supported upon the floor by means vofcaster 68. Each caster, 68 isset upon shaft 69, which is journalled within a pair of bifurcated arms 70 (Fig. 10), whichis integrallyformed with and downwardly depends from cylindrical member 71, upon the upper endV of which reststhe lower end of the lower tubular member 65. Projecting in an upward direction from `said cylindrical member 71 is a reduced cylindrical stud 72-v which enters the lower end of said lower tubular member'65and is journalled therewithin for a rotary `movementfor rotatably shifting caster 68 in any direclion. Said stud72'is provided with a circumferential groove 73 for-accommodating therewithin the .inner end of screw 74. If screw 74 is loosely positioned within said groove l73 by its inner end, said screw will permit rotary movement of said stud 72 within said tubular member 65, but will prevent the disengagement of said stud in a longitudinal direction. If however said screw 74 is driven to a suicient degree so as to engage by its inner end the body portion of said stud 72 at the bottom of said groove 73, said stud 72 will become thereby'rlocked to said tubular member 65 preventing the rotation Vof the former within the latter, for maintaining caster 68 in a xed position.
Screw `75 vis Vdriven through one of said arms 70 for selective .bearing against the web of caster 68, and thereby for providing a'brake, preventing rotary movement ofV caster-.'68 and thereby for maintaining casters 68 in an immovable fixed position upon the oor.
For strengthening the said superstructure, including Asaidfframer57,` atransversebrace 76, rigidly connecting ;by itsends with the longer sides of said frame 57 in .acentral relation therewith, is provided.
Apair of tubular bars 77, each of which is in a spaced parallelrelation with each longer side members of frame 57, and on the inward side thereof, is passed through said brace 76 and is rigidly aixed by its ends to the -shorter end members of said frame 57. By this means saidtubular bars 77. are rigidly supported in the said superstructure, in alongitudinal relation with said frame 57. Ofcourse, there may be as many of said tubular bars,77,as may be required.
.Mounted Vupon each of said bars 77 in a longitudinal sliding relation therewith is a plurality of sleeves 78, each .of which, Yadjacent one end thereof, is provided with a Vrigidly kformed and downwardly depending hook 79. Each of said sleeves 7S is further provided with a knobbed screwl), Ain a transverse relation therewith, whereby the ysleeve, may be rigidly engaged with the tubular bar 77 vfor maintaining the same in a longitudinal adjusted relation with said tubular bar 77.
Removably positioned upon one or more of said hooks- 79, isaplllley4 attachment, best shown in'Figs.`2':ind 8, which' includes "block 81, with one end 'of whicha bifurcated arm 82 is rigidly formed. Pulley-,83l is jour- V nailed-.for a free rotary movement within said bifurcated 5 -arm'82 uponV shaft 84, the latter supported in a rigid relationiby the free end of said bifurcated arm 82.
' r[he opposite end of said block V81, axially thereof, is provided with semi-spherical depressionforl reception `,therewithin of ball 85 which is rigidly formed with one Vend of rod'86. Aiixed to that end of said block 81, by means of a plurality of screws 87, is a retaining plate 288, which is provided with a central bore 89, ofl-a diameter smaller than the diameter of said ball 85. I"The central body portion of said retaining yplate 88, 'adjacent said bore 89, -and lon the inner face of said plate 88, is provided with a semi-spherical chamfer, which is complementary of the semi-spherical depression in said block}81, for'accommodating said ball 8S and for af- "fordingfa swivelconnection between said block 81 and `ball 85. The body portion of said-plate 88, adjacent saidbore 89 is in a spacedrelation with said rod 86, as is-clearly seen -in Fig.-8. By virtue of the arrangement described block 81 and pulley 83 are capableyof angular-as well as circular shifting movements Awith -relationf-to'rod 86, being guided in those movements by ball- 85. It is Vnoted that ball S5 is freely rotatable within-the cavity defined by the depression `made in block 81 and chamfer made in plate 88. Made-Y at the opposite end of said rod-86 is eye 90 for selectiveengagement with hook 79 depending from any one of said sleeves 78.
vA--pair-.of said pulley attachments .last hereinabove described, one supported by sleeve 78 upon each. of ,Said ftubular bars`77, is capable of supporting a cord, one end Aof which may be made to engage a weight, with the opposite end .of which may be connected to a stirrup, the latter to be engaged by a patients foot for affording exercise to a patients leg when the leg is moved up .and 'downwhile the patient reposes upon platform 13. 40 In connection with this mode of exercise, platform 13 -shouldfbe rendered immovable upon its pivot -46, by extending the U-shaped members 54 in a downward direction and in contact `with the floor.
' Two cords, each engagedby a pair of pulleys 83fmay 45 be usedfor affording a simultaneous exercise for the .patients leg and arm. Another example for providing van exercise for a patient would be to pass a cord over apair of pulleys 83, one supported Vuponsleeve78 upon one' bar 77 adjacent one end thereof, and the other pulley supported upon sleeve 78 upon the other bar 177, adjacent the opposite end of the latter. In connection with thismode of exercise, each end of the cord may be madefto Support a stirrup, one stirrup to be engaged by the patients foot while the other by his 55 hand. Alternate pull and release of the hand stirrup would alternately move the patients leg up and down, thereby affording exercise to both patients leg and arm. Of course, a great variety of positioning of pulley attachments may be employed to afford various exercises to 6() a patient. Obviously, even one pulley 83 may be used to support a cord with a stirrup connected to each end thereof. Each foot of the patient may be made to engage one stirrup for providing alternate lifting and lowering of the patients legs for affording a simultaneous exercise to both legs. v
The means for imparting to platform 13 the seesaw motion upon its pivot 15---46 which is supported by the said superstructure, and is capableof operation by the patient while in a recumbent position upon platform 13, includes a pair of tubular, pulley supporting members 91, each welded or otherwise rigidly aiiixed to the outer face of the end side of frame 57 and centrally thereof. A pair of similar central pulley supporting ,members 92 is provided, each welded or otherwise rigidly aixed to brace 76, adjacent each of said tubular bars pull exerted upon stirrups 99 by the hands and arms.
77.- A11 of said p ulley supporting members 91 and l92 are-lin a-vertical relation with the said superstructure and platform'13. u
Iournalled within each bers 91 and 92, for a rotary movement therewithin, is shaft 93, through upper end of which dowel pin 94 is 'extended in a transverse relation. Dowel pin 94, riding upon the upper end of each of said pulley supporting membersV 91 and 92, supports the same thereon and prevents the disengagement of said shaft 91 from said pulley supporting member, while permitting a rotary movement of the former.
Integrally formed with each of said shafts 93, and
downwardly depending therefrom, is a bifurcated bearing95. Bearings 95 coacting with pulley supportingk members 91 support pulleys 91 and bearings 95 coactof said pulleysupporting meming with pulley supporting members 92 support pulleys e v of said cords 97 and 98 are engaged With hooks 100,
which are aixed to the underface ofV platform 13, adjacent each end thereof, and directed towards the transverse axis of said platform 13, as is best seen in Fig.
12. When said platform 13 is placed directly below l the said superstructure, said hooks 100 will be directly upon the perpendicular plane extended through said'pulleys 91.
When said U-shaped members 54 remain in a collapsed relation with said extensible members 53, and consequently in a spaced relation with the hoor, as is seen in Fig. 2, alternate pull upon one or the other of said stirrups 99 by the patients hands, will cause` the opposite end of one or the other of said cords 97 or 98 to shift in Ian upward direction, thereby causing the two ends of platform 13 to make alternate angular shifting movements uponits pivot 45-46, to or away from the floor.
'Ihis will in turn result in a seesaw or teeter movement of said'platform 13, thereby alternatelyraising or lowering patients head portion and lower extremities of his body. This in turn will have an advantageous result in improving the bloodY circulation and strengthening the muscular action, while at the same time exercising patients arms and shoulder and chest muscles due to the During the operation of said cords 97 and 98'for imparting a seesaw movement to platform 13, springs 50 at all times tend to bring platform 13 to its horizontal posi- `tion on releasing the downward pulling force at stirrups 99. This is especially true when it is considered that said cords 97 and 98 are flexible, and therefore when the pressure at stirrups 99 in a downward direction is re- -leased said springs l) will Vtend -to bring platform 13 and f the patient reposing thereon to a horizontal position. Therefore, the patient need only to concern himself with imparting pulling action at the inner ends of said cords 97vand 98 in order `to pull said ends in a downward direction, while engaging said stirrups 99 with his hands, Vfor `the purpose of imparting ya seesaw motion to said Y seesaw motion of said platform 13.
Cushions 18, adjusted to the patients height, by shifting tubular members 25 to or away from the transverse v center of`platform 13, being in contactual `relation with patients feet'and head, Vwill preventsliding of the patient klongitudinally of platform 13, in either direction.
The U-.shaped 'members 54 need not be adjusted to the l"same distance from platform 13. vOne may be removed fartherv away from platform 13,v while opposite one may Ybe shifted nearer tothe said platform. The one of said U-shaped members 54 which has been adjusted farther away'from platform 13 will of course come in contact with the oor during the Vseesaw ymotion of platform 13 sooner than the opposite of said U-shaped members 54,
thereby limiting the downward shifting movement of one end of platform 13. VThis relative adjustability of the -two U-shaped members 54 in' order to shift one end of platform 13 nearer to the iioor than the other end of said piatform 13,-will again depend on the particular re- Vquirernents of any given patient.
VFoot plates 39 may be substituted with casters such as casters 68, including their appurtenances marked with numeral characters 69 to 75, inclusive, and best shown in Fig. 10. This will permit sliding of platform 13 away Yfrom under the superstructure aforesaid, on first disconnecting cords 97 and 98 from hooks 100. On moving Vthe platform from under said superstructure, casters, such as casters 68, may be locked byV screws such as screws 75, for the purpose of maintaining and supporting platform 13 immovably upon a oor. On shifting `said U- shapedrmember 54 in engagement with the oor platform 13 will become immovable upon its pivot 45-46 and will remain rigid with relation to the door, for use as an examining table or a table upon which patient may be given a massage or other therapeutic treatment.
It is further noted that cushions are adjustable upon Yhinges 20-21 from vertical position, as shown in Fig, 2,
` form 13 is made immovable by extending said U-shaped ,cords extended through pulley or pulleys 83, as was hereinabove described.
To strengthen thesupporting legs for beam 29 and pivot 45-46 of platform 13, the four upper tubular portions 35 of said legs may be interconnected by horizontal braces 101, as seen in Figs.'2 and 3.
While there are described herein preferred embodiments of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.
y What I claim as new is:
Vl. A therapeutic andrgymnastic bed comprising an oblong platform having a flat top surface Vadapted to support a person irlv a prone position thereon, supporting means underlying said platform andV pivotally connected at the top thereofto the underside of the platform at the longitudinal center thereof, tensioned connecting means between said support means and said platform disposed on each side of said pivot connection, a frame supported in vertically spaced relation above said platform, means for rocking said platform comprising a pair of transversely spaced pulleys mounted on the frame at a central location longitudinally thereof, a pair of pulleys mounted one on each end of the frame transversely centrally thereof, and a pair of cords, each connected to a different end of said platform and extending upwardly and over the one pulley at the corresponding end of the frame and thence overone of the longitudinally central pulleys and having an end hanging free from said lastnamed pulley, said free end adapted to be grasped by the prone person on the platform to rock the platform about said supporting means, said platform having a stop on each end thereof, one for the head and the other for the feet of the person prone thereon, said platform having vertically adjustable depending means to control the amount of tilt of said platform.
2. The structure as set forth in claim 1, said tensioned connecting means comprising a spring connected at one end to the supporting means and adjustably connected at the other end to the platform longitudinally thereof.
3. The structure as set forth in claim 1, said control means for the tilt of the platform adapted to be extended to the -iloor from both sides of the platform pivot to stabilize the platform, said cords being disconnectible from said platform whereby said platform may be moved away from underneath said frame and used as a massage table.
References Cited in the le of this patent UNITED STATES PATENTS Shank Apr. 27, 1926 Daniels et al. Dec. 4, 1928 Olson Apr. 30, 1940 Glasin Aug. 3, 1948 l Houghtaling Apr. 7, 1959 FOREIGN PATENTS Great Britain June 1, 1933 France July 6, 1938