US1735703A - Tiltable chiropractic table - Google Patents

Description

" Nov. 12, 1929. w. G. WILLIAMS TILTABLE CHIROPRACTIC TABLE Fild Dec. 5, 1924 4 Sheets-Sheet, 1

NOV; 12, 1929. I ,w 1 s 1,735,703 I TILTABLE CHIROPRACTIC TABLE Filed Dec. 3, 1924 4 Sheets-Sheet 2 a Ulbma.

Jrzwnfon Nov. 12, 1929.

'w. G..W|L.LIAMS TILTABLE CHIROPRACTIC TABLE Fi led Dec. 3, 1924 4 Sheets-5heet a Nov. 12, 1929. w. G. WILL,IAMS

I "I' ILTABLE CHIROPRACTIC TABLE Filed Dec.'5, 1924 4 Sheets-Sheet Patented Nov. 12, lg

erases s ng +1 WILLIAM e. WILLIAMS, or main, ILLrnois, ASSIGNOR r0 WILLIAM J; LORA'NG TILTABLE CHIROPRACTIC TABLE Application filed December 3, 182 Serial No. 753,736;

This invention is an improvement in tiltable chiropractic tables, of the'type shown in my U. S. Letters Patent #1,t35,037, dated Nov. 7, 1922, and the principal object thereof is to provide a novel tiltable chiropractic table whereby the patient can be comfortably lowered from a standing to a horizontal posi-' tion when being placed on the table, and can he raised again to a standing position. after, or any time during, the therapeutical ma nipulations.

Gther objects of the invention are to provide means for raising or lowering the table frame when the patient is placed thereon, and for cushioning thelowering of the tableframe with or without a patient thereon; to provide novel means whereby a multiplicity of springs can be brought into operation one by one, or detached in like manner, for the purl pose of more or less cushioning and counter balancing the lowering'or raising of the table frame, either empty or with a patient thereon; to provide counter-balancing springs for the tiltable table frame, which may be selectively, operatively connected with the table frame to off-set the weights of patients of varying weights, from that of small children to the weight of the heaviest adult; to provide novel toggle means whereby the foot step may be automatically caused to recede at a certain point during the lowering of the table to a horizontal position, when suflicient weight of the patient is on the table top to prevent the patient from slipping back as the step recedes; Other minor objects of the invention will be hereinafter set forth.

I will explain the invention with reference to the accompanying drawings which illustrate one practical embodiment thereof to enable others to adopt and use the same, and will summarize in the claims the novel fea tures of construction, and novel combinations of parts, for all of which protection is desired.

in said drawings: N a

Figure 1 is a side elevation of my novel tiltable chiropractic table, showing the table frame tilted into raised position. V

Fig. 2 is an enlarged side elevation of the cams which operate to release the clutches which connect the springs to the table frame; also showing the notched dial for locking the cam shaft and indicator for the various positions of the cam shaft for diflerentweights. Fig. 3 is a longitudinal elevationpartly in section of the cam mechanism and clutch rods. 1 1 s Fig. 4. is a sectionon the line 4 4, Fig. 3,

showing one position of the camsand clutch rods.' a a.

Fi'g. 5- is a bottom plan Viewshowing the under side ofthe base, and the one spring permanently attached to the table" frame and the clutch mechanism for operating the three other springs. g Fig. 6 is an enlarged view of one section of the clutch, with itsfclutch rod pivotally attached thereto.

Fig. 7 is an enlarged side View of the clutch I locked over'the' conical headed rods and the spring means for keeping the clutch collars normally in locked position.

Fig. 8 is an-enlar'gedrlongi through thebase showing the receding step toggle mechanism.

Fig. 9 is a detail of the clutch collar. 7 As shown in the drawings, the chiropractic table comprises a lower supporting or base portion; an upper adjustabletable' portion pivotallymounted upon the base portion so tudinal section 7' that it can swing from a-substantially vertical toa horizontal position, to facilitate the patient getting uponjor off the table; means for cushioning the tilting movement of the table top; and a. recedingstep. q I

The base portion asshown in Figs. 1,5 and 8, is substantially the same as that shown in my Patent #1,435,037, said base comprising a casting 1, having depending flanges 1? on its sides and around one end, and provided at its flanged end with sockets for the reception of suitable foot pads 1 At the other end of base 1 are two oppositelydisposed upstanding short curved standards 1 which support a shaft 1 upon which the table frame is pivotally mounted. The curved standards 1 project slightly beyond the ad jacent end of casting 1, and said end of the base is preferably supported on rollers 1 journaled on stud shafts 1 r The table portion consists of two parallel side bars or tubes 2, which are connected and properly spaced apart by any suitable means, said bars 2 adjacent their lower ends being connected in any desired manner to hangers 2 hung or v pivotally mounted on shaft 1. On the bars 2, adjacent hangers 2 are mounted depending arms 2 between the lower ends of which extends a bar 2 to which the cushioning springs,hereina fter described, are attached. I

The table frame is provided with cushions sections A, B, and G, which sections are preferably adjustable longitudinally of the frame to suit patients of different heights, and are also capable of being adjusted to other positions relative to the frame, in the usual manner, said sections forming no part of my present invention. 1

i As above described, the table portion is hingedly mounted upon the shaft 1 Its tilting' movement is cushioned or counterbalanced by means of springs, as shown in Fig. 5, which springs 3 (three being shown) are disposed below. the base plate 1,'and extend longitudinally thereof, the ends of said springs opposite the rod 2" being attached to at member '3 'bolted between the depending flanges 1 of base plate 1, preferably by means. of bolts 3 having their heads embedded in'the ends 20f the springs, the outer "threaded ends of said bolts 3 passing through perforations in the member 3 and provided with nuts, whereby the tension 0 edge of plate3 adjacent rod 2, is provided with V-shaped recesses 3, one such recess be ing provided directly above the axls of each spring 3, and the upper face ofsaid recessed edge of plate 3 is beveled slightly downwardly as shown at 3 in Fig. 7 A block 3 is mounted on the adjacentend of each spring 3, said blocks 3 having a cylindrical projection 3 3- provided with an enlarged end, adapted to fit the inside diameter of springs 3, and the end of said spring 3 is wrapped tightly around said enlarged projection to securely bind the block to the spring. Each block 3 is provided with a tap-bolt 3 in its upper'face, the head of said tap-bolt being disposed above the upper face of the block 3 a distance slightly more than the normal thickness of the plate 3*. Tap-bolts 3 are adapted to engage the V-shaped recesses in late 3, as shown in Fig. 7, whereby the locks 3 and hence the adjacent ends of spring 3 will normally be supported by the heads'of bolts 3 engagedin the V-shaped recesses 3. When however springs 3 are stretched, as hereinafter described, the bolts 3 of blocks 3 will move out of the V shaped recesses 3 but when the springs are again released the bolts 3 will again enter the recesses 3, thebeveled edge 3 serving to guide the returning bolts, and bolts 3 will assume their normal positions of rest at the apexes of the recesses 3 thereby supporting the ends of springs 3, as shown in Figs. 5 and 7 The springs 3 should be given a slight initial tension in order to maintain the bolts 3 in the recesses in plate 3.

Springs 3 are adapted to be connected or disconnected simultaneously, or in sequence i to the bar 2, which as above stated is attached to the tiltable table frame, to increase or diminish the leverage or table counterbalance, as desired, when raising or lowering the "table frame, to off-set the weight of a particular patient. As shown in Figs. 5 and 7, rods 3 are threaded into the blocks 3*, and adjustable thereon by means of lock nuts 3 en'- gaging the blocks. The outer ends of rods 3 areprovided with enlarged cone shaped heads 3, adapted to normally fitinto corresponding cone-shaped recesses 2? extending diametrically into the bar. 29, Fig. 7. j 7

- Over each of the cone-shaped recesses 2" in bar2 is a collar 4, which is provided with a slot 4 to receive a pin 2 on the bar 2, whereby the collar may rotate, within the limits of the slot, on the bar 2 but is not movable axially thereon. circular opening 4 (Fig.9) adapted for the passage therethrough of 1 the cone-shaped head 3 of rod 3 said opening having a recess 4 extending into opening 4 said recess being of slightly greater width than that of the rod 3 whereby the head 3 of rod 3 may as shown in enter the recess 2 in bar 2, and when collar 4 is rotated to engage the slot 4: with the rod 3, as shown in Fig. 7, hcad3 will be locked to the bar. Gn'collart is an arm e (Figs. 6, '7 and 9) to which is pivoteda clutch rod 4 (hereinafter described), and a spring t connects arm a with a bar 2 (Fig. 5) preferably) extending between the hangers 2 tonormally maintain each collar 4 1n locked posi- In the collar 4 is a tion, i. ,e., with its opening 4 out of align- V ment with the recess 2 in bar 2, thus maintaining the head 3 within the said recess.

The lower ends 4? of clutch rods 4 are reduced and threaded, and pass through studshafts 4 on the outer ends of arms 4 Springs t may be also attached to stud-shafts 4, as shown in Fig. 6.

The clutch rods 45 are all of same length, and pass upwardly, and are provided at their upper ends with elongated loops a through which passes a cam-shaft 5, housed in suit able bearings 5 on the table frame members 2,

as shown in Figs. 1,2 and Adj acent the looped end i of one clutch rod at, is a -cam 5 fixedlymounted on shaft 5, said cam 5 being semi-circular in shape. Game' adjacent the looped end of the next rod l is quarter-circular in shape, but of same radius as the cam parallel with that of cam 5, and its curved face disposed to the left of rods P; and cam 55* extends parallel with the straight face of earn 5, and to the left of rods 4:. Below and contacting with each cam 5, 5, and'5", is a bar l mounted on each rod 4 below said cams, whereby as shaft 5f is rotated the cams w ll depress their respective rods i and thereby disconnect their respective clutch collars l. G11 one of the bearings?) is a dial 5? coaxial with camshaft 5, andthe outer end of shaft 5 is bent substantially at right angles to'its axis as at 5 so as to contact with the face of dial 5 the angle of said portion 5 being made slightly acute with respect to the axis of said shaft, and the extremity of said portion 5 is bent parallel to shaft 5 to form a handle for rotating said cam shaft. ln'the outer edge of'dial S are notches'5 (four being shown spaced 90 between centers) into which notches the bent portion 5 ofshaft 5 is adapted to enter to lock shaft o in such position, and a spring 5 is interposed between the cam fg and bearing 5 for yieldingly maintaining the crank handlefi notches 5 earns 55, 5 and 5 are parallel and disposed in the same plane, andwhen the shaft 5 1S rotated so that theparallel-faces ofthe three cams their respective plates 1 (which position is j t diametrically opposite to that shown in Fl 2, 3 and 4:) all of the rode t? will l i raiscdposition by the action 53 of their spi ,s 4:. and henceall the collars i onbars 2 will lock the lIQEtClS'S of rods 3 to the bar 2, whereby thethree springs 3 will he -aole f giving the maximum cushioning elf counteroa ance; The notch 5 in 'wh h tne operativelv engaged with the t iandle 5 engages for this result marked 11 50 to 400 pounds, as shown in Fig. 2, the springs 3 being adjusted so that their combined eifects i will counterbalance a patient weighing botween the above limits.

Ply turning the handle a quarter turn to the next notch (marked Infants i Fig. 2-) all of the clutch rods l will be depre sed by their cams, and hence all of the springs 3 will he the bar 2 of the-table 6 disconnected from ponnds, the handle'h should be rotated the position marked 150 to250 on the dial 5?, in which position two springs 3 arecon-i nected to the'table frame, and'for weights frame "and hence no tension will. he exerted thereby on the table frame. I

By turning the handle the next quarter turn (marked 0 to 150 pounds, which is the position shown in Figs. 2, 3, and a), cams 5, 5- will depress their respective rods l shown in Big. 8, and thus operate their co 11s t to unlock their respective spring 3 from the bar 2, but cam 5 will permit its rodl 7 CO remain in raised position whereby its spring .3. will alonev engage thebar 2 of the table frame,

and hence only one sprin 3 is operative. 'On

the next quarter turn cam 5 will depress rod 4-, but cams 5 and 5 will permit their rods t to remain in raised position to connect two springs 3.to the table frame, and this position may be marked 150 to 250? as shown in Fig.2. Iv i 7 Hence, for infants, the handle 5 would be rotated to the notch marked Infantson dial 5 in which position none of the springs 3 are connected to the ta le frame. For patien weighing up to 150 pounds the handle should be turned to thenotch marked .Oito 150. in which position only'on'e spring 3 1s connect d to the frame (see Figs. 2, 3,. and i). For.

patients weighing between 150 and 250.

between 250 and flOO pounds, the handle should berotated intothe positionmarked 250 to 400 pounds, in wliich'positionall of the'springs 3 are operatively attached to the table frame. i

The normal weight the table alone, or when empty is counterbalanced. as shown in Fig. -5, by means of a spring 3 disposed beside the springs 3, and having one end attached to tlie'plate 3 inga manner similar to springs 3, but having its other end attached directly to the bar 2 bymeans. of a threaded rod having an enlarged head embedded inthe end of spring '3 saidrod having a threaded end engaging a hole in rod 2, with anut thereon, whereby spring 8 is constantly connected to ma 2. Its tension may be regulated by adjusting the nuts on rods 3* and 3 Spring 3 shouldbe so adjusted that its tension counterbalances the table frame when empty, so that .t-he' table.

frame can be lowered for adjusting infants or small children, or for use without danger f of the table flying up as in the case where the tension cannot be reduced to such extent.

In connection with my'chiropractic table frame I provide a receding step mechanism on the lower end of the table frame. Step 6 is mounted on the lower ends of rods 6, which rods are slidably mounted in the lower ends of the tubular frame members 2. Y acent each frame member 2 is a link 7,having a curved slot 7 therein. The lower end of said link being pivoted as, atfl to the standards'or lie,

rec

uprights 1. The upper end of link 7 has a forward projection 7 and a link 6 is pivotally connected at 6 to the step 6, and pivoted at 7 to the forward projection 7 whereby links 6" and 7 together form a toggle connection for operating the step 6. The center of the curvature of slot 7 a is the axis of the shaft 1 and the lower end of slot 7 a terminates in a slot 7 b disposed substantially radially of the shaft'l for the purpose hereinafter described. Extending between the depending portions 2? of castings Q 'is a rod 2 (Fig. 5) to which the springs .43 which operate the clutch collars 4.- are attached, said rod 2 passing through and slidable in the slots 7", 7 of toggle links 7 so that when the table frame is in raised position the rod 2 is at the top of slot 7 as shown in Fig. 8, and foot step 6 is in its closest proximity to I the table frame. I As the table is lowered, rod

2 slides downwardly in slot 7 a without moving link? until said rod comes to the lower end 7 of slot 7 at which time rod 2 acts upon the link 7 and pushes same outwardly, upon further movement of the table frame, into the position shown in dotted lines in Figure 8, by pushingfrods 6? downwardlyin the frames 2, and thereby moving the step 6 away from the patients feet. This receding movement of the step 6 prevents the patient from contracting his muscles by bracing his feet ag'ainst step 6.

Atxthe point where rod 2 begins to move I the link 7, the table is" more than halfway lowered,'i. e. disposed at an angle of less than degrees, so thatthe patients body rests substantially on the tabletop, and hence the body will not slide down with the receding "step. 'When the tableis being raised the step 6 meets'the patients feet at thesame point wherethe step began to recede during the rality of springs each having one end conlowering movement. The substantially-radial portion 7 of slot 7 a is disposed in'the direction of the natural path rod 2 is inclined to travel just as the rod begins to function to operatethe toggle links.

I do not limit my table to the exact form shown in the drawing, for obviously changes in the details of construction maybe made, without departing from the scope of the invention? 3 What I claim is; t

1. A chiropractietable comprising a base;

a normally counter-balanced table tiltablymounted; adjacent one end on said base and having a plurality of recesses therein; a plunected to said base and the other end provided with a head adapted to enter its respective recess; and means on the table for selectively connecting and disconnectlng the heads of said springs and table, according to the load to be applied to the table.

2. In combination with a table as set forth in claim 1, a step reciprocably mounted on the .ment. V V

6. A chiropractic table, comprising a base, 7

said recess; and means for normally retain-.

ing said head in said recess; and devices on the table for operating said connecting means.

4:. In a table as set forth in claim 3, said devices comprising a shaft on the table, a

cam on said shaft; a rodengaging said con necting means and said cam; whereby as the cam shaft is rotated the rod will actuate said connecting means.

5. In combination witha table as set forth in claim 3, a step movably mounted on said table; a toggle for moving said step, and

means for operating said toggle during a predetermined portion .of the tilting movea table tiltably mounted on said base; a plurality of springs each having one end attached to said base; means for individually K connecting the other ends of said springs to said table; means for maintaining said springs in predetermined fixed position with the engageable ends thereof adjacent and in alignment with said connecting means and devices on the table-for operating said connecting means, whereby the springs maybe brought into action according to the load to be, carried by said table.

7; In a table as set forth in claim 6, said connecting means comprising a memberon said table having a plurality of recesses therein; rods on said springs having enlarged heads adapted to enter said recesses; and

means for normally retaining said heads in said recesses. I

8. In a table as set forth in claimr6, said devices comprising a shaft rotatable on the table; a plurality of cams on said shaft; a

plurality of rods each engaging a connecting means and a cam; whereby as the cam shaft is rotated the rods will actuate their respective connecting means.

9. In combination with a table as set forth in claim 6, a step movably mounted at one end of said table; a toggle for moving said step; and means for automatically operating said toggle during a predetermined portion of the tilting movement. 7 g

10. chiropractic table, comprising a base, a normally counter-balanced table tiltably 'mounted adjacent one end on said base; a

plurality of springs each having one end attached to said base; means for individually connecting the other ends of said springs to said table; means for maintaining said necting means, whereby any number. of "said springs maybe brought into action according to the load to be carried by said table.

11 In a table as set forth in claim 10, said connecting means comprising a member on said table having a plurality of recesses therein; rods onsaid spring having enlarged heads adapted to enter said recesses; and means on said member for normally retaining said heads in'said recesses. 12. In a table as set forth in claim 10, said devices comprising a cam shaft rotatablymounted on the table; a plurality'of cams on said shaft; a plurality of rods each engaging a connecting means and acam; and .means for adjusting the position of said cam shaft, whereby any number of said rods may be actuated to operate their respective connecting means.-

13. In combination with a table as set forth in claim 10, a step reciprocably mounted at one end of said table; a toggle for reciprocating said step; and means on said table for operating said toggleduring a predetermined portion of the tilting movement of said table. 7 i i v 14. A chiropractic table comprising a base; a table'tiltably mounted on said base; a

'a spring having one end attached to said base;

said table having a recess therein; a rod on said spring having an enlarged head adapted to normally enter saidrecess; means for normally supportingesaid rod; and means for retainingand releasing said, head.

15. In a table asset forth in claim 14, said rod supporting meanscomprising abar extending transverselyof said rod, .and having a 'V-shaped recess therein ad] acent said rod; and a bolt on said ro'd having'a head adapted to normally engage the apex of'said recess. 16. In a table asset forthin'claim 14, said 'head retaining and releasing; means comprising a member movablymounted over sa1d recess and having an opening therein for the passage'of said head, said opening having :a slot therein for the reception of the rod while the head isin said recess; an arm on said member; spring means for normally maintaining said member in posltlon to lock said head insaid'recess; and means-for moving said member to release the head. 1

a 17 In combinat' on with a table as set forth inclaim 14, astep movably mounted on said table; barspivoted'at their lower ends to the base; links pivotally connecting sard 'step with the upper ends ofsaid bars; sa d bars having arcuate slots therein concentr c with the tilting axis of the tablewhen said bars are in normal position; the lower ends of said I slots terminating in a slot substantially radial of the tilting axis means'on said table engaging said slots,wwherebyasthe table'is tilted the means will slide in said arcuate slots without moving said arms, but when the means engage said'radial slots. thehbars will be moved to actuate the step. I

18, A chiropractic tablecomprisingabase; a table tiltably mounted on saidbase; a plu rality of springs each havingone andade justably attached to said base; said table having a plurality of recessestherein; rods on said springs having enlarged heads adapted to normally enter said recesses; means for normally supporting said rods; and means for retaining and releasing said'heads, where by any number of 1 said springs mayj be brought into actionaccording to theload on said table. I, 19. In a table as set forth in claim 18, said ing transversely of said rods, and having a plurality of l-shaped recesses in one edge,

one such recess being provided adjacentseach 7 rod; and a bolt on each .rod having a head adapted to normally engage its respective, recess, whereby: the head of said bolt at the apex of Isaidreces's will support its'related 20. head retaining and releasing means comprising a plurality of members movably mounted over said recesses, said-members having opnings therein for the passage of saidheads; said openings having slotstherein for the reception of said rods while theheads are in said recesses; arms on said members; spring Ina table asset forth in claim 18, said means for normally moving said members cesses; and means for moving said members to release said heads. 7 1

into position to lock :saidheads in saidre- 21. In combination with atable asset forth 7 in claim 18, a step movablymounted on said table; bars pivoted at their lower ends to the base; links pivotally connecting said members with the upper ends of said bars; said bars having arcuate slots therein concentric with the tilting axisof the table when said barslare in normal position; the lower ends 'of said v i slots vterminating in a slot substantially radial ofthe tiltingiaxis; pins on said tableengaging'said slots, whereby as the tableisti'ltedthe pins will slidein said arcuate slotswithout moving said arms, but when the pinsengage said radial'slots the barswill be moved to actuate the step.

22- A chiropractic-table comprising a base; a table tiltably mounted adjacent one end on said base; aplurality of springs each having one end adjustably attached tosaid base ;said

table having a pluralityofrecesses therein;

rods on the free ends of said springshaving V I enlarged heads adapted to normally enter said recesses; means for normally supporting.

the free ends of said rodsyzandmeans'ffor 35 supporting means comprislng a bar extenda in for the passageof said rods while the 'ie'taini'n'g and "releasing said heads", whereby any number of said springs may be brought into action according to the load to be car riedby said-"table. 1 I

J23. Ina table as set forthin claim 22, said supporting means comprising a bar parallel with said rods and extending transversely thereof, said bar having a plurality of -V-shaped recesses in its outer edge, one such recess being provided adjacent each rod; and a bolt on each rod adapted to normally engage its respective recess, whereby the head of said bolt at the apex of said recess will 7 "support the rod.

24. In a table as set forth in claim22, said head retaining and releasing means; com

prising a plurality of members movably mounted over said recesses, said members having openlngs thereln for the passage "of said heads; sald openings havlng slots thereheads are in said recesses; arms on said member spring means for normally moving said members into position to lock said heads in said recesses; a shaft rotatably mounted on said table; a plurality of cams onsaid shaft,

a plurality of rods each engaging a cam and an arm; a crank for rotating saidshaft; whereby different combinations of' said rods :will be actuated according to the position of said crank, to operate their respective memhere V 7 25., In combination with a table as set forth in claim 22, a step movably mounted on the lower end of said table; bars pivoted at their lower ends to the base; links pivotally con 7 necting saidmembers with the upper ends of said bars; said bars having arcuate slots therein concentric with the tilting axis. of'said table when said bars are in normal position the lower ends of said slots terminating in a 7 slot substantially radial of the tilting axis;

pins on said table engaging said slots, where- I by as the table is tilted the pins will slide in said arcuate slots'without moving saidarms,

but when the pins engage said radial slots the a bars will be moved to actuate the step,

i 26; A chiropractic table comprising a base;

J a"' 'normally counter balanced table tiltably mounted adjacent one end on said base; a

plurality of springs each having one end ad- -justably attached to said base; said table having a plurality of recesses therein; adi justable rods on the free ends of said springs 'having'enlargedheads adapted to normally enter said rods; means for normally-supporting the-free ends of said springs; and' means for normally retaining said heads in "said recesses-and for releasing said heads "whereby any number of said springs may be brought into action according to the load to ab'e carried bysaid table. I N

- 27; Ina'table as setforth in claim 26, said supporting meansicomprising a bar parallel ith isaid rods 1 and. extending transversely thereof, f said bar Thaving a: .plurality a of V-shaped recesses in'its outer edge, one such recess being provided adj acenteach rod; and a bolt on each rod adapted to'norm-ally engage its respective: recess, whereby the head of said bolt at the-apex of said recess, Twill support the rod; the recessed "edge 'of said bar being beveled forthegpurposespecified: 28. Ina table at set forth in claim 26, said head retaining and releasing means flco'mpris- K ing a plurality of collars rotatably mounted over said recesses, said'collars having openings therein for th'e'pass'age of said heads; and said openingshaving slots'therein for :the reception of said rods while the heads are in said recesses; means forlimiting the *ro tation of said collars; arms on" said collars; spring means for normally rotating saidcollars'into position to lock said *heads in said recesses; acam shaft rotatablyrmounted on said table; a plurality of cams on said shaft,

a plurality of rods each engaging a cam and w an arm; a crank for rotating said camshaft; and a notched member engaging saidcrank, whereby different combinations ofisaidsrods will be actuated according :to. the position pf said crank, to operatetheirrespective col ars. I V f I 29. In combination with a table'asset forth in claim 26, members slidably mounted 'on the table frame; a step on thelower ends of said members; bars pivoted at their lower ends t0 thefbaseadjacent'said members; links 1 30. A chiropractic table'comprisinga base,

, a table tiltably mountedon said base, a plurality of springs eachhavingon'e end fixedly 3 secured'to' the base and the opposite'end'provided with a head; means carried ,by the table for selectively engaging; said heads, whereby a desired numberofisaid springs may be brought into accents-my be 'required to counterbalance "the. different weights carr ed by the'table in-raisingIand lowering; and means accessibly positioned upon the table for operating' said last-men} said: springs to said table f .v r

31. A chlropractictable comprising a base,

a tabletiltably mounted on said base; aplurality of springs 1 each having oneiendfixedly 'sition" for connecting a desired number, of

secured-to; the base and the oppositeend nor imal yirea fom butadarted FQQ11Q 1 tioned'means when thetable is in its 'up po- 7 .v

with the table, rotatable means carried by the table andadaptecl to be operatively connected to said springs selectively, and means accessibly arranged upon said table foroperation of said rotatable means to connect a selective number of springs with the table in accordance with the weight to be carried by the latter.

32. A chiropractic table comprising a base, atable tiltably mounted on said base, a plurality of springs each having one end fixedly secured to the base and the opposite end normally'free from but adapted to be connected with the table, means carried by the table and adapted to be operatively connected to said springs selectively, said means being normally spring-held in inoperative position, and means accessibly arranged upon said table for operation of said means to connect a selective number of springs with the table in accordance with the weight to be carried by the latter.

33. A chiropractic table comprising a base,

a plurality of springs supported in horizon-' tal position by said base, a table tiltably connected with the base and normally discon nected from the springs, said springs being fixedly secured to the base at one end, means on the table adapted to be connected with the other ends of said springs selectively when the table is in the up position, and

means accessibly' arranged upon the table for hand operation whereby said connecting means may be engaged with a selected number of said springs according to the weight to be carried thereby.

In testimony that I claim the foregoing as my own, I affix my signature. 7

WM. G. WILLIAMS.

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