Патент USA US2407772код для вставки
sepf.`17, 194e. J. P. DE Rass -2,407,771 - «SEAT SUPPORT Filed Aug. 4, ~1941 5 Sheets-Sheet l l „____y l5 IT 29| * aan .32| 3 I3 29 i5 INVENTOR BY JOHN/.3 DeRosa /Nê/u/»j 94. ’(/awà-y ATTORN EY Sept. 17, 1946. J. P. DE RosE 2,407,771 SEAT SUPBORT Filed Aug._ 4, 1941 5 Sheets-Sheet 2 INVENTOR e2 BY JOHN P DEROSE `~ my M ATTORNEY Sept. 1,7, 1946. J". P. DE Rose: 2,407371 SEAT SUPPORT Nm @wwwufnm_El.sg”?. a@ ,Q _ J.,f1 5 m m P.S w W „m l;. ._ l .,:Wë4 Ü m v; wm! . , Sept. 17, l1946. J. P, DE RosE 2,407,771 SEAT SUPPORT Filed Aug. 4, 1941 , _5 Sheets-Sheet 4 -4 _ Mii; l 49‘47 L 8 36 33- INVENTOR BY don/v P De Rose » ‘I ` ` u ' @532W . sept. 17, 1946. J. P. lzuszRosE;` .2,407,771 SEAT SUPPORT Fßiled Aug. 4, 1941 5 sheets-sheet _5 M.3 / 44 lu W lu //2 /24 Il@ ‘las’ BYdoH/v PDE/Q05 E. M14. @my ATTQRNEY Patented sept. 17, 1946 UNITED ' 2,407,771 STATES Y PATENT l. ‘OFFICE 2,407,771l SEAT SUPPORT i I » ` 1 _ John P. De Rose, Albany, cani. » _ Application August 4, 1941, Serial N0. 405,279 , 8 Claims. (Cl. 155-14) ’I'he invention relates to an adjustable seat elevations at the lines l 3-13 and lli-_.14 in _Fig support, and embodies certain improvements over - s ure 9, the seat base being level. n* the disclosures of my U. S. Patent No. 2,179,085, Figure 15 is a _fragmentary plan View of a por and my U. S. Patent No. 2,298,351. tion of the 'support vstructure at the right `side A general object is to provide an improved thereof. ’ " i seat mounting for height and/or angularity and/or fore-and-aft adjustments of the seat with In the embodiment of Figures 1 to Al0 inclusive, features of present invention are disclosed in respect to a fixed base of the mounting. Another object is to provide a re-positioning control such that only corresponding adjust the structure of a seat unit which comprises a seat 9 having a back Il] and mounted on an ad 10 justable support assembly which extends from ments are permitted at the opposite seat sides. ï a supporting surface II such as that provided by A further object is to provide for a resetting of a ñoor I2. ’I'he- seat 9 is of a usual upholstered the position-determining elements with a min type having a bottom plate or frame I31 for direct imum of manual effort. mounting on the adjustable support structure, The-invention possesses other objects and fea 15 the seat structure being rigid against distortion tures of advantage, some of which, with the fore ' thereof. The present seat unit, while of gen going, will be set forth or be apparent in the eral utility, has been particularly designed for following description of typical embodiments its installation in a vehicle for use by an occu thereof, and in the accompanying drawings, in pant thereof. which, Figure 1 is a left-side view of an assembly of a seat and its mounting embodying the features of present invention and disposed on a support; ing ñoor, the seat bottom being primarily shown as level, with other adjusted settings thereof be ing indicated in dash lines. Figure 2 is a fragmentary upright section through the seat mounting structure with the seat tilted forwardly in one indicated position of Figure 1. " Figure 3 is a plan view of the seat support taken at the plane of the line 3-3 in Figure 1. Figure 4 is a sectional elevation at the broken line 4_4 in Figure 3. Figure 5 is a front view of the assembly of Fig ure 1, a major portion of the seat back being broken away. Figures 6 and 7 and 8 are fragmentary sec tional views taken respectively at the line 8-6 and 'l-'I and 8_8 in Figure 2. l ‘ IB and a ro'd I'I engagingboth pairs of members I4 and I5 in a manner to support the former from The members I4 comprise plate ele ments of like size and outline having flanges I4' - the latter. extending transversely therefrom at their bottom edges to provide ñoor bearings for the plates and a means by which the plates maybe secured to the floor I2 in relatively ñxed and mutually parallel relation, as by boltsjIB. The members I5 >comprise plates of like'size and outline hav . ing transverse top edge flanges I5’ by which they 30 may be secured to the seat bottom I3, as by bolts I9, for their simultaneous disposal adjacent and parallel to the opposed inner faces of the plates I4, said flanges being directed inwardly andV to 40 ward each other. ' Figure 9 is an enlarged fragmentary plan sec Near their upper edges and in front portions tion taken generally at the plane of support of ‘l thereof, the plate members I4 are provided with a seat-carried section of the mounting upon a like sets of interior slots `2I which are laterally ñoor-carried section of the mounting when said spaced and extend parallel to the base edges of sections are related as in Figure 1, said plane of 45 the members with corresponding said slots at support being indicated at the line 9-9 in Fig- 1 . like distances therefrom. At corresponding ure 10. points thereof adjacent the junctures of their Figure 10 is a sectional elevation at the line front and lower edges, the plate members I5 IO-II) in Figure 9. are provided with transverse guideways which Figure 1l is a left-side view of another em slidably mount the catch-bolts IB for their nor bodiment of the invention. mal Ytransverse projection from `the plates Iii Figure 12 is a view of the seat-supporting into corresponding slots 2| 0f the plates I4.» The structure of Figure 1l corresponding to the view guideways for the bolts I6 comprise aligned openings in the plates I5 and in end portions E2 Figures 13 and 14 are fragmentary sectional 55 of brackets 23 extending _rigidly from the inner of Figure 2. y Essentially, the present seat support assembly comprises a pair of base members I4 for fixing to the floor I2 to extend upwardly therefrom, a pair of members I5 for fixing to the seat‘bottom I3 to depend therefrom, and a pair of catch bolts ~ 2,407,771 3 sides of the plates I5, each said bracket having a cylindrically curved arm portion 24 extending above the bolt portion between the plate and the bracket portion 22'. An helical spiral slot 25 is provided ln each bracket arm 24 and slidably receives an arm 26 extending rigidly from the bolt I6 and arranged ative catch-bolts 34 to permit a fore-and-aft ad justment of the seat with respect to the base pro vided by the members I4 is arranged to be effected through an appropriate rocking of a rod or shaft 38 which is journalled in and between the plates I5 at corresponding forward and upper points thereof. As particularly shown, radial arms 33 extend fixedly from the rod 33 inwardly of and to engage the forward slot end as a stop under adjacent the plates I5 and generally downwardly. the influence of a spring 2l‘when the bolt isA operatively engaged ina slot 2I of the base mem 10 from the-rod, and links 4I connect the arms 39 with the extending ends of the bolt arms 3l ber I4; the arrangement is such that a suilicient rotation of the bolt to move its arm 26 rear- l ' » Íwhereby a rocking of the rod 38 may simultane ously withdraw both catch-bolts 34. Tension wardly in the slot 25 will withdraw the bolt from springs 42 extend between the arms 39 and an~ its operative position by reason of the sliding engagement of the bolt arm 26 with the forward 15 chorages on the plates I5 forwardly thereof to .constantly and yieldingly urge, through the links edge of the slot 25, said edge functioning as a 4Il and bolt arms 31, the operative disposition of » spiral cam. Such a rotation of the bolt to effect its inoperative disposal is arranged toi be'ef-" the bolts 34. At leastl one end of the control rod 38 extends beyond the adjacent base plate fected by means simultaneously operative upon 20 I4 and ñxedly carries aradial arm 43 for use as both arms 26 and hereinafter described. a handle to effect a rocking of the rod 38 to Near their upper edges and in rear por simultaneously disengage therbolts 34 from the tions thereof, the base members I4 vare provided slots 33 of the plate; as shown, the handle 43 is with interior openings comprising slots 28 ex positioned opposite the left side of the seat 9, tending parallel to the plate base and _at rlike and the rod 38. is supported thereatby a bracket 25 distances therefrom, and the members I5 are pro 44 fixed to and beneath the bottom- seatL plate I3. vided toward their rear ends with corresponding It will now be noted-that the adjusted support upright slots 29. The rod I'I is constantly en of the back of the seatefrom the rod Il is ar gaged through the mutually intersecting pairs of slots 2‘8 and 29 for its lateral sliding through f ranged to be -effected through a device including these slots, is arranged to be adjustably spaced 30 likestruts 45 >which are cooperative in a com mon plane between the seat and block members from the seat while extending freely through the 46 mounted on the rod and rotatably receiving upright slots 29, and constantly bears on the the rod I'I therethrough, and are angularly ad lowerl edges of the slots 28 as the support means> for the rear of the seat. justable with respect to the seat bottom. At their p upper ends, the struts 45 mount rollers 4l which are arranged to constantly bear against the flat With Vthe support-bolts I6 engaged in- corre sponding slots 2I>of the base members I4 and under faces of inwardly directed bearing plates 48 fixed beneath the seat and comprising ex is supported upon the base membersr I4 for its x > tensions of the flanges I5’ of the plates I5, and fore-and-aft adiustment while maintained in a 40 the lower strut ends are pivotally ñxed to the blocks 46. Mutually parallel gusset plates 48 set angularity and height relation to the support and 50 connect the front- and rear edges of each ing iioor I2. To provide for a maximum de bearing plate 48 with its plate I5 and define gree of fore-and-aft adiustment for the seat, the the rod I1 engaged in the horizontal slots 28 of the members, it will be understood that >the seat slots 2l and 28 are of like length and have their . between them a guideway in which the block 46 centers spaced as the line of the bolts I6 is hori 45 zontally spaced from the rod I'I. To insure equal fore-and-aft adjustments of the opposite seat sides, gears 3l are ñxed on the extending ends ofthe rod I'I and constantly engage yracks 32 .' ñxed Ion themembers I4 in parallel relation to 50 their rear slots 28, the rod being freely rotatable and being cylindrical at its slot-engaging bear ing portions to permit its rotation as the seat is shifted. ` ` is secured and guided for its rectilinear adjust ment withrespect to the seat. The arrangement is such that the seat is raised furthest from the rod I'I when the struts 45 are swung about their pivotal connections with the blocks toward up right positions thereof, and vice versa. By particular reference to Figures 2 and 3 and 4 and 8 and 9, it will be noted that each block 46 is of general channel section having its sides 5I ’ parallel and intermediately connected by a ' >Each of the plates I4 is provided with a similar 55 portion 52 which extends from the channel web 53 and is provided with a bore which receives the set of openings comprising upright and'laterally rod I'I for rotation therein. The strut 45 is spaced interior- slots 33 intermediately of the forked and has its unforked end pivoted tof and sets of horizontalr slots 2I and 28, and catch bolts 34 normally-project from the plates I5 to l > between the block sides 5I for thepswingingr of engage a said slot for securing the seat in fore 60 the strut about an axis perpendicular to the rod axis. The free fork ends receive the roller and-aft adjustment. The bolts 34 are slidably 41 between them for rotation about a pívot pin and rotatably mounted in bores provided in cylin - 54 engaged through said ends. At their «outer drical bosses or brackets 35 which extend inward ly from intermediate points of the plates I5 near ç ' 'faces the block sides 5I are pro-vided with lon their bottoms. The upper sides of the bosses 35 65 gitudinal guide ribs 55 which are complemen tarily engageable in the channels of like and are provided with’spiral cam'slots 36 which slid oppositely-directed offsets 56 of the plates 49 and ably receive arms 3'I which extend radially from 50, whereby the blocks are vguided by and be the bolts 34 and engage theouter ends of thetween the plates for solely rectilinear movement slots 36 when the bolts are operatively engaged , y in corresponding slots 33 of the plate I4. The 70 to or from the seat which they carry. Understanding that a swinging'of a strut 45 arrangement is like that for the control of the to move the strut» toward or from an upright bolts I6 whereby an appropriate rotation of. a position while the roller 41 thereof supportingly bolt 34 is arranged to effect an inoperative dis-> engages beneath ytheseat at av bearing platei- 48 posal of the bolt. ' ' ' thereon is effective to respectively raise or lower The simultaneous release of the normally oper 75 5 the adjacent fseat `portion :with respect Lto Athe ñxed "base assembly, `.means :are provided 'ïto :ad `î'jh‘e dog to .for "from , 'isteringqnotc‘hes ß1andnlì8.. iA compression spring SI12 fisi engaged “,between'the lmember T10 ?and _a :seat ’justably ‘position and secure .each fs'tru't ffor ad» justing “the seat height thereat.` "Preferably and .fonîthe plate .f_5íto1constantly `Jirge and normally maintain the operative engagement -Jof .the dog as shown, the `strut :adjusting means `«is .arranged to be 'simultaneously and correspondingly opera» withra -ii’otch 26.8 o'f the .fbloc-k`> 46. tive Lupon the struts -45 «at ìb'oth “sides- »ofA "the lseat “in such a manner that A»the .supported rear ` i i l ». ¿Atrockshaft 13iisjournalled 'in'and 'between :correspondingßupperi points <of :the depending seat ‘ seat portion `may be and remain 'level laterally thereof -forall its adjusted positions. 6 :operative tpositioniinfi'eg `:plates IE‘ßinterniediate their .lengths` and in fpar-` :all'el A»relation 'to fthe rod`> 2H. j ‘14 ‘depend -iixedly `:from the s`ha'ft‘13 inwardly of `and ad' jacent the plates to clear the bosses 35 for‘the :bdlts:34,rand Alinks 15 and `16 ¿respectively "connect l "Essentially, -the lpresent means for vadjustin the angularity o‘f 'fthe struts »T45 »comprises `fa pair v oîi‘ra‘ck ‘bars v51 extending ‘from «pivotal connec tions with the diiîeren‘t vstruts ¿and "having 'the the farms 1.11 kwith .the farms "26 of Ithe bolts T5 'and teeth of their racks 58 constantly engaging op 3.5 -wtth‘bottom »points of thezmembers 10 which pro posite 'sides 'of fa `gear-'58 ñxedlon' a -s‘haiït l¿Iii ‘which ‘is rotatably mounted ’on and ‘benea'th‘the seat ybottom I3. As particularlydisclosed in Figures `3 çand 4, the racks ‘58 -guidedly vextend into arrec tangular casing ‘62 at opposite sides yof the gear :2.0 A59 `and‘with their teeth engaging "the gear with in Ythe casing 4while >Ithe »backs of theracks ‘slid ably engage the finner 'faces fof opposite lcasing 'sides 63. 'I'he casing B2 *is'ñ-Xed-to the 'seat bot '.vide the :dogs 69. arrangement "is such that a mocking-.of :the `shaft ï1f3 ‘in ìone` direction `will :effect ¿a rwithdrawal .of theîbo‘lts rl‘6, while a rock iing .of 'the ` shaft -in the (opposite direction will ef `‘ïfeet an `îinnpz-ir'ativc disposal .lof the dogs 69. Headed ¿pins 11'1 Von the arm 14 `engage slots `18` andv '19in-the links 115 and 116 respectively `where fbyla rocking of ¿the shaft -13 to release the front '.orLthe.back-ofïthefseat ßforlits'up or down :adjust ftom I3 intermediately-o'f’its‘sides fto-disposefthe .1 rack and gear yassemblyfpara‘llel thereto, and the en't does not simultaneously release the `rear or . 'front of the seat‘éfor its adjustment.' A gear »s'haft 6| "is journalled in »and between 'the opposed top -and bottom `sides of the casing 'in the‘fcommon plane of adjustment of the struts 45. In the present structure, the Pshaft 13 extends ‘beyond the left `:side .of ¿the seat lß'and carries an arm 8l ñxed thereto and normally extending-up ‘Hinged connections are ‘provided between >the with a knob 82 to facilitate -a manual >rocking `of the armfand shaft 'to lselectivelyrelease the front or back of the :seat 'in thedescrib'ed 'manner »and as "desired, With the present arrangement, a `rear-ward rocking of the arm 8l ‘is ‘arranged ‘to «wardly'from theshaft, `said arm bein-g 4provided rack ¿bars 51 and the struts »45; in the present - instance, forks 64 fixed îon the ’bar ends »span »eac'h rol‘er 41 andthe strut end‘thereat, »and re fceive the rextremities of tïhe pivot pins l51H70 pro vide the hinged `connection of the b’ars'and struts. The rack Abars fareiormed with-odset portions 65 between the racks 58 land the forks V64 to provide Yfor the engagement of their racks `at opposite sides ofthe gear 59. Compression spi‘in‘gs‘ßô en circle the bar portions between `their racks 58 and the offsets 65 land are operatively »eng-aged between the casing ‘ends 1from ‘which the "bars extend andseat collars 66’ adjustably ñxed on the bars, said springs being -constantly »operative to urge an ‘upward swinging of the -struts 45 land a ' release theîrear of the seat‘for adjustment, while a forward rocking lof Asaid arm releases the front of the seat for 'its adjustment. As shown, the ‘support bracket 4.4 A'for -the .extending Vend ofthe 40 control 4rod 38 also Provides a support iorïthe extending end of the shaft 113. ‘ ‘ The described .common means which is pro vided `by the shaft 13 ‘for >selective actuationy to simultaneously `release ‘.the‘fsupport bolts I6 lto permit aheight adjustment of :the ‘front of -the seat or to simultaneously‘withdra'w the dogs «'69 raising of the seat with «a `toggle jack action. to permit a height ¿adjustment .'of‘the backrof :the Since the springs 66 constantly urge `a disposal seatobvious'ly permîi'ts `the `release of the seat `for ofA the ‘back 'of the seat in >`fully raised position only one of said adjustments at `a :time Also, when the ‘seat is unoccupied, 'and the weight of 50 since the 'seat'fis of :relatively `rigid structure :and an occupant of "the lseat `may rforce-the seat-‘down is constantly :supported "at :its ‘back 'in ‘parallel 'wardly‘against the resistance «of Athe springs sto an relation to the support `rod 111, it is important’to intermediate Aor fully ` lowered position, `means ‘ are `note that ‘the front of the Aseat will remain Spar provided'îfor positively securing the back fof the >allel to ‘the common line of' the front bolts 4I6 seat in any one of a number lof adjusted positions during any adjustment thereof, whereby to "in with respect to the support base. surefan even front or `rear adjustment ’of vthe ‘seat with V.respect ‘to ‘its two sides. ¿In the present instance, 'a 'means for ‘securing theback of the seat at a desired adjusted‘height Rather than 'depend on 'the application 4_of ,a -is cooperative between the -blocks 46 v'on the shaft person’s weight for setting the back of the seat l1 and the plates l5 >which 'are fixed `to the seat in adjusted position .against ‘the ‘joint :resistance and mount the plates »49 and :50. 7More `spec’i?l cally, the channel-like >offsets -56 -of the `front guideway plates 49 are provided'with'correspond ling transverse 4notches or >kerfs ‘61 across them, the guide Aribs 55 of the blocks '46 engaging in said offsets 56 v"are veach provided with a plurality of notches 68 for vselective Áregistration ywithdif ferent notches 61 as the plate |15 'is "raised‘orlow `ered with respect to the Iblock, and a »dog 169 is provided ’for engaging 'a 'pair of >registering 'notches "6»1 and `68 to :positively support the )back ofthe seat upon ythe’rod l1. -Eachdog 69 is A‘pro >vided at ‘the 'lower end ‘of va 'swinging member 1D Awhich has its vupper end'mounted on ~-a pin' 41-I extending from =the Aplate ~'4`9\ for Ja swinging of of ‘the >springs v66, rmeans .are preferably uprovided to positively 'actuate >‘the rack `bars 51 ito eiïect `the fdesired adjustment when the seat vvis free lfor vertical adjustment iwith ‘respect >to the ro'd 1|1. As particularly illustrated, :the »shaft 6l for the rack gear 59 carries a -worm gear V84 which is engaged 'by a worm shaft 85 Ajourna'lled on the under side of ythe casing 62 for-its turning to ` ¿project or withdraw 4the rack bars 51 las ‘a pos `fitive height ¿adjustment Ameans »for the back Vof the seat. ‘Noting that the horizontal component of the'supporting` reactionofthe struts :45 onthe bars 51 may not rotate the worm shaft «B5 if its thread pitch '-is low enough,'-the `described ar rangement -ma-y itself securefthe »struts «'45 iin :set 2,407,111 angular-‘relation to theasupported‘seat for ad justmentïonlyg- by turning the' shaft; the latter isA assumed 'in the >present instance,v` whereby the support dogs 69 and Atheir action and control 'z vA >spiral'slot |25 is providedln ,each bracket ’ arm |24 and slidably receives an arm |26 extend ing rigidly'from the «bolt ||6 andiarranged to engage fthe forward slotA end_'as a stop when the bolt is operatively engaged in1a slot |2I ofr the base member vI I4; the> arrangement isv such that-»a As brought out in. Figure 3, the front end» of sufficient rotation of the bolt to move its garm»|26 the-‘worm-shaft 85istarranged for engagement rearwardly in the slot |25 will withdraw the bolt byfa‘rha'nd crank .86 for its fmanuallturning with from its operative position by reason of the slid -ai high“ degree 'of mechanicaladvantage. ` In this manner, the manual v'effort required for effecting 10 ing engagement oil-the bolt arm |25~withfthe forward edge of the slot |'25.~ Such a `rotation an adjustmentat'the rear of the seat is mini 'of the boltto effect its inoperative. disposal is arranged to _be effected by a means simultaneously :.«Meansmay be provided in the described seat >might'be omitted.,_> mized.; ‘ . i vfzz- i , .- ` n» I ' j ç . , p. i ~ - ‘mounting structurelforso >limiting the raising of «thefseat vabove the floorf as to maintain-the oper ativeness of ,the .support elements to coact with and between the'baserand seat. As particularly operative against both bolt arms I261and.\herein- . after ’ Thedescribed. rear portions-of i the base . members » j' ,» I I4Y i are seat-carried plate |5.opposite the outer side-_of provided with like sets of interiorslots |211- similai` to the sets of slots |2I, the-latter slots »being parallel to the former. At corresponding points >bottom projection 89 directed toward'the plate `>I4 Yand engageable with a projection 99" extend with transverse guideways which slidably mount ingabove it-from la top part of the plate' |-4 when , the bolts II'l for their normal Ítransverse projec the seat‘is> raisedto »its desired limiting height, tion from the plates I I5 _into corresponding slots illustrated, a member 88 'depends fixedlyfrom the " the Aplate | 4 and is provided with a transverse 20 Ythereof adjacent the junctures of their rear and lower edges, the plate members |I5 are provided the lprojection 90 being long enough in a fore 25 |21 of the plates I |5. _Brackets |23gsuch as those which vmount'the bolts IIB are provided for the and-aft direction toinsure its engagement` by the bolts _I I'I and are provided with spiral slots î|25 projection 89' for vall settings of the seat. receiving arms |26 extending laterally from the f _ The-embodiment of Figures 1l to 15 inclusive bolts II`| in the manner previously` described »discloses` a seat unit which comprises a seat |89 ` ` having a back I I0 and mounted on an adjustable 30 for the bolts ||6. _With the support bolts |,Iíì> engaged in» corre support assembly` which is interposed between -spondingforwardslots I2I of the base members 'it and a supportingisurface I | I such as that pro |,|4»and the support bolts ||`| engaged incorre vided by a floor I I2. The seat IGS has a flat bot sponding rear slots |21 of. the: members, it will ytorn plate I I3 which is mounted on the adjustable ` supporty structure, the seatl structure being rela 35 be understood that the seatis supported upon tivelyrigid against twisting or bending distortion. While of general utility, the present seat unit has the base members I I4 for its fore-and-aft adjust- _ ment while it is maintained in a set angularity and height relation to the'supporting floor ||2.- A»To >also been particularly designed for its installation provide for a maXimum~_ degree of fo-re-and-aft “in a'vehicle, and comprises a pair of base mem `abers; I I4._ for fixing tothe floor ||2 toA extend up 40 adjustment for the seat, the slots |2I and |21 of their different sets are of like length and have wardly therefrom, a pair of members II5 for i'lX their centers spaced-as the line of` the boltsv | I6 ing to the seat bottom I I3 to depend> therefrom, is horizontally spaced from the line of the bolts andfront and rear pairs of bolts IIe and ||'| each engaging a pair of adjacent >members I|4 I Il. i - \ U and H5 at the different seat sides in a manner to As in the first-embodiment, means are provided support the latter members from the former. `The members I lllfcomprise’plate elements of like size and outline'having base flanges |I4' for seating the‘opposite seat sides.> _ In- the present structure, on the floor to which they Vmay be' secured as by bolts IIS. VThe members |I5 comprise plates of y likesize and outline havingY transverse top edge flanges I I5’ at which they may be secured to the seat bottom II3 by bolts or the like, said plates being .disposed ‘adjacent and i parallel to the interior face Vof the plates I I4'. ‘ In front portions thereof, the plate members l I I 4 are provided with like sets of mutually parallel interior slots I2I which are laterally spaced in to insure equal fore-and-aft adjustmentsY for Va shaft |28 is journalled in and betweenthe plates H5 adjacent the seat and near the rear edge thereof in -parallel relation tosaid edge, and the extending shaft ends mount gears |29 lwhich are arranged to constantly engage the teeth of under lying racks I 30 -provided on rigid arms |3| pivoted to the base plates I I4 adjacent'their upper front corners for swinging, as »the back of the seat is raised or lowered, about an axis which is parallel to the axis of swinging of the seat on the front support bolts I I5, the shaft aXis also being parallel to the latter axis. The present racks |39 are upright lines and extend parallel to the top -edges of the members, it being noted that the top 60 provided at appropriate upper edge portions of the arms I3I, andl means are pro-vided to insure edges of the plates II4 are angularlyv related to a constant operative engagement of the gears |29 the bottom edges of the plates and slope down with the opposed racks.>4 » wardly from their front ends. At corresponding points thereof adjacent the junctures of ~ their i As particularly illustrated-members |32 depend front and lower edges, the Seat-carried plate'mem ,from and rotatively receive the shaft>|28 out wardly of and adjacent the gears |29 thereon> and 4extend opposite .the outer faces of the arms |3I bers' I |5 are provided with transverse guideways ’ which slidably mount the support bolts IIS for their normal transverse projection from the plates I I5 into corresponding slots |21 of the plate I I4. ' The guideways for the bolts I I6 comprise aligned _ 70 to so engage the arms as to prevent a mutual separation of the >gears and racks` while permit ting anadjusted positioning of the gear longi openings in the plates` |I5 and in brackets |23 tudinally of the racks. The members |32 are pro extending rigidly from the inner sides ofthe plates „vided at their bottoms ywith outturned flanges f |32' _which aredisposed beneath and adjacent the _ I I 5, each said v bracket having. a cylindrically , curved arm portion Y|24 overlying the bolt portion `lower edges of strap-like. members I3I’ having «between the> plate and its free extremity. _ . their extremities ñxed tothearms I3! and _having __ _ _ >their intermediate> portions spaced from and co operative with said arms’to provide guideways in which the members |32 are slidable longi tudinallyof the arms while the flan-ges |32' cooper ate with the lower edges of the members |3|’ to maintain the desired constant engagement of the racks with the corresponding gears. 10 ment does not simultaneously release the rear` or front of the seat for its adjustment.. In the `present structure, the shaft |46 extends beyond the left side of the seat |89 and carries an arm |54 fixed thereto and normally extending `upwardly from the shaft, said arm being provided with vakndb |55 to facilitate a manual rocking of the arm and shaft to selectively ¿release the Each of the plates | i4 is provided with a similar set of upright and laterally'spaced interior sl'ots front or back of the seat in the described manner |33 intermediately cf the sets of horizontal slots 10 and as desired, With the present arrangement, |2| and |21, and bolts |34 normally project from a rearward rocking of the arm |54 is arranged each plate ||5 to `engage a said slot for securing to release the rear of the seat for its adjustment, the seat in fore-and-aft adjustment. The bolts while a forward rocking of said arm releases the |34 are slidably and rotatably mounted in bores front of the seat for’adjustment. As shown, the provided in cylindrical bosses or brackets |35 support bracket |44 for the extending end of the which extend inwardly from intermediate points control rod |38 also provides a support for the of the plates H5 near their bottoms. The upper extending end of the shaft |46. ` sides of the bosses |35 are provided with .spiral Although vertical adjustments of the front or slots which slidably receive arms |31 which ex back of the seat |09 may be selectively effected tend radially7 from the bolts |34 `and engage the 20 by withdrawing the bolts ||6 or Ill while man outer ends of the spiral slots when the bolts are ually supporting the freed front or vrear seat edge, operatively engaged in corresponding 4slots |33 means are preferably provided for constantly urg of the plate i i4. The arrangement is similar to ing a raised positioning of the back of the seat that for the control of the support bolts ||6 and as an aid to positioning the same for the reen H1, and of the bolts |6 and 34 ,of the first em 25 gagement of the bolts | |1 in corresponding slots bodiment, and is such that an appropriate rota |21 after an adjustment has been effected. As tion of a bolt |34 is arranged, through the guided particularly sho-wn, the means for urging an up engagement of the arm |31 thereof in the slot ward disposal of the Iback `of the seat essentially of the boss |35 which carries it, to effect aninop comprises a toggle-jack arrangement at each seat erative disposal of the bolt. end having links |56 and |51 respectively pivoted The simultaneous release of the normally oper to the base flanges l| I4' and connected .at a com ative bolts |34 to permit a fore-and-aft adjust mon pivot pin |58, and urged toward a mutually ment of the seat with respect to the base provided aligned relation in which the back of the seat by the members ||4 is arranged to be effected would :be fully raised .by the action of' a spring through an appropriate rocking of a rod or shaft |66 which is appropriately operative with respect |38 which is journalled in and between the plates to said links. i ` | I5 at corresponding forward and upper points The present links |56 and |51 are bipartite thereof and inA parallel relation to the shaft |28. and span an intermediate portion |6| of the pin As particularly shown, radial arms |39 depend |56 which is provided Vwith a diametral bore which ñxedly from the `rod |38 inwardly of and adjacent 40 freely receives a rod |63 pivoted on a. stub shaft the plates-l I5, and links |4| connect the‘arms |39 |64 at a rear point of the plate` | I4, said rod ex with the extending ends of `the bolt arms |31 tending forwardly of the pin |58. A spring seat whereby a rocking of the rod |38 may simultane member|65 is adjustably mounted on. the free ously withdraw both bolts |34. Tension springs end of the rod |63 and an helical compression |42 extend between the arms |39 and anchorages spring |66 receives the rod and is constantly op on the plates ||5 forwardly thereof to constantly erative between the member |65 and a seat ring and yieldinelîv urge, ,through the links |4| and |61 mounted on the rod and engaging the link bolt arms |31, the operative disposition of the ends adjacent the pinV |58. The varrangement is bolts |34.y At least one- end of the control rod such that the springs |36 of the two toggle-jacks |38 extends beyond the adjacent base plate ||4 50 and flxedly carries a radial arm |43 for use >as a handle to effect a rocking of the rod to simul are jointly and equally A operative to urge' an ' upward raising of the rear of theiseat for more than counterbalancing the supported seat Weight. It will, of course, be obviousdthat the action of the springs |66 is utilized only during an adjust taneously disengage the bolts |34 from the slots |33 of the plate; asshown, the handle |43 `is po sitioned opposite the left side `of the seat |08, ment of the back of the seat when the support and therod |38 is vsupported thereat by a bracket 55 bolts |11 are inoperative, and the seat is sup |44 fixed to and beneath the bottom seat `plate ported upon the jacks through the arms» Í3| and H3. y racks |39 and gears |29 and shaft |28. Y A rock shaft |46 `is journalled in and between Means are provided for preventing the raising corresponding upper points of the depending seat of the seat |89 appreciably above the level .at 60 plates | I5 intermediate their lengths and in par which `the :bolts | | 6 .and | |1 may respectively en allel relation to the shaft |28. Arms |41 depend gage the top slots 12| and |28 of the base plates fixedly from the shaft 1.46 inwardly of the plates H5. As shown, a member |68 depends ñxedly to clear the 4bosses |35 for the bolts |34, and links from each seat-carried plate ||5 opposite the |48 and |49 respectively connect the arms |41 cuter side of the adjacent base plate I4 and is with the arms |26 of the bolts ||6 and with the provided with an inturned bottom projection |69 arms |3| of the bolts ||1. The arrangement is which underlies andis engageable with a projec such that a ro-cking of the shaft |46 in one direc tion |19 extending from the top part of the plate tion will effect a withdrawal of the bolts | I6, While ||4 when the desired limiting height of the sea-t a rocking of the shaft in the opposite direction 70 is reached. The arrangement and stop action are will effect a withdrawal of the bolts I |1. Headed substantially identical with those for the members pins |5| on the arms |41 engage slots |52 and 88 and 90 of the first described embodiment. |53 in the links |48 and |49 respectively whereby From the foregoing description of my inven a rocking of the shaft |46 to release the front or tion, taken in connection with the accompanying the back of the seat for its up or down adjust 75 drawings. the advantages of the construction and l2 il 'supporting it- from the base member, and operation YwillV be readily understood by those means on the seat operative against the strut skilled in the art to which the invention apper ~tains. While I have described the features and to dispose and yieldingly nx the strut in angu larly adjusted position with respect to the seat for providing a disposal of the seat at an ad justed height with respect to the base member. `5. A structure in accordance with claim 4 having a dogging means releasably fixing the 'use' of assemblies which I now consider to be preferred embodiments of my invention, I desire "tohave it understood that the showings are pri marily illustrative, and that such changes may ‘be made, when desired, as fall within the scope of the following claims. ‘v I claim: relatively adjusted guide members against rel ative movement. 1 ' . 6. In combination with a seat, a seat-sup - -1. Invcombination with a seat, a seat-sup porting means comprising transversely spaced :plate members supported in upright position porting means comprising a base member> dis beneath the seat in> fore-and-aft relation there face, avseat support element supportedly Ven gaged with said face for fore-and-aft adjust posed beneath a seat in fore-and-aft relation thereto and provided with a horizontal support to and Aprovided with like sets of vertically spaced' ‘horizontal slots, corresponding pairs ,of _laterally lspaced and horizontally disposed front and rear bolts reciprocably carried by the seat` and normally disposed selectively in slots 'of the' different plate members to cooperatively ment along it, members on the seat and support element telescopically engaged to guide the ele ¿mentv and'seat for a rectilinearly adjusted spac 20 ing thereof, a toggle strut hinged to the ‘guide member on said support element and extending support the seat from the members in iiXed an obliquely upwardly to slidably engage the seat gular and height adjustment while permitting itsffore-and-aft adjustment,` rack bars pivoted to said plate members at corresponding points thereof >in generally horizontal disposition for for supporting the seat from the element, and .means on the seat operative against the strut 25 swinging in planes parallel to the members and having their racks facing upwardly, a shaft ro tatably carried by and beneath the’seat cross ways thereof and above the rack-bars, gears on Ísaid shaft engaging the different said racks, ., i A'7.’In combination with a seat, a'seat-sup porting means comprising relatively ñxed and transversely spaced base members disposed be neath’the seat in fore-and-aft relation thereto and .provided with mutually coplanar horizontal support zfaces, a support element supportedly >andmeans operative to maintain the coopera tive- engagement of the gears and their racks 'whereby the seat is restrained to like move ments thereat during va fore-and-aft adjust mentthereof. f ‘ ' ' restingiupon said faces and movable therealong, complementary toggle struts hinged to the sup . `2. A structure in accordance with vclaim 1 having means constantly and resiliently opera tiveçthrough‘the rack bars and gears and shaft port element and> extending obliquely upward to urge a raised disposal of the’seat. 3; In combination with a seat,r a seat-sup- L :portingmeans'comprising a basefmember, a support element supportedly engaging the base 'member at a ñxed level thereof, a toggle strut 'hinged to said element and extending obliquely upwardly from its hinge point to a supporting contact with the seat, means operative to vary the» Obliquityv of said strut for the support of the seat thereon at an adjusted height thereof, telescopically engaged guide members carried by ‘the support element and seat respectively and cooperative to confine said element and >seat to relative movement in a fixed line trans verse to the seat, anda dogging means releas vably operative between said ‘guide members to` secure the seat at its adjusted height. 4. In combination with a seat, a seat-sup porting means comprising a base member dis' posed beneath- a seat in fore-and-aft relation thereto, guide members on the seat and base member telescopically engaged to guide the seat for a rectilinearly adjusted spacing thereof with respect to the base member, _a toggle strut hinged tothe guide member and extending ob liquelyV upwardly to slidably engage the seat for to dispose and fix it in angularly adjusted posi -tionwith respect to the seat for Providing a set ting> of the seat at an adjusted height with re spect to the base member. Íly from their hinge points to» have their upper ends supportingly and slidably engage the seat, and means on the seat operative‘against the struts at their upper ends and adjustable to adjust-the mutual spacing of the upper strut ends to change the Obliquity of`~ the struts and thereby yadjust the spacing of the seat from the element. ‘ . 8. In combination with a~ seat, a seat-sup-‘ porting means comprising a pair of transversely spaced and relatively iixed base members dis posed in opposed relation beneath the seat and extending in fore-and-aft relation thereto, a so pair of complementary upwardly extending ob liquely ’disposed laterally spaced toggle struts of equal lengthrlying in the same vertical plane and each hinged toY a different base member for piv otal movement-toward and away from each other, said toggle struts having their upper ends sup portingly and slidably engaging the seat, and means including a gear and racks spanningthe distance between and connecting the upper strut ends and adjustable to move the upper strut ends toward or away from each other to change the obliquity of the struts and thereby,` adjust the ' spacing of the seat from the base members. 1 JOHN P. DE ROSE.