US1782398A - Back-rest arrangement for chairs - Google Patents

Description

Ndv. 25, 1930. 1', D 1,782,398 I BACK REST ARRANGEMENT FOR CHAIRS Filed June 13, 1928 1c seet W t t 'Iiheebp've meptie ied .ebject of the iii'vention, as Well es/ dhere togetheriwiththe nalny Teiems Patented Nov. '25, 1930 hpmwps); OEPRKQJDGIQ-ILLINOIS; Assieiqoit To w mm s. min ms, new cm nm Aepo RE GTE-[A113 QOMPANY,-QE ELKHABTQ i DIANA" i BAQERESTA RM EMEM iron CHAIRS L '1 pp i atipn fil d M1 back rest 'arahgementl for chairs and it 0011'- siste of thehei'einaftei' rdescribed and more particularl mint d put in t p ndedel tm i tween thehtck; rest lpesteiid sje'atef a chair iOli relativeto said et ed w reperg ii advalitagesttheiieef williiiore fully occur as l, pnoeeed' with Iiiy specification t i In {the awi g 1 s-ev1e W 1n side elevetionlof a chair is adetailk jiew (if e'fmgnient 6f. the

tiiineyelbolt is connected thereto;

H ther typeofpheirS Where the; peculiar cha-reicteristics make. it i of ad ntage to d qso.

wliefe n g.;n wa f de a l ht i mbe i new the-inven ion:inven d in t it tion hyl p q tom-x :ii t rmed etet p drs compee n l i lmw n f Jth e r hi h is we isnbt te t a y k I of metalit nclud sfia .j d tc mi si iilum tyte ttubu l sfifi yt e, t p j nds e M4625 n pectiv y- The b tto nds. i

the. leg are bent out ard yft p efth Spta knecs fiyJiQ Stab lity and thew' tremities; thereof carry ca s tere pr dp ee '6 upon which the chair may be readily i iqved em tyin m m re edfbackeest arrangement-@ 1928. ser a h. 284,966."

the tepend Of said base or standardend having suitable rotativebearing asr well es vert cel ad ustment With 1 reference to {said atitstop and a pair (if ifeanwardlylextending ppe r,

9 indicates-a e efwhqlethe seatfr aine of the of frojnt andsi'e art members 10 land 11 respectively and side members 12, z ll'of angle/bar stock with the vertical flanges facing? upwardly "from the horizontal; flenge-which faces inwardly. Connecting the mid portipiis of said front and rear members of the Seat frame is a metallic plate- 130f aqwidth less than that of seid seatfi ame. :Said pl ete in3 1 el s a hc c ta ly p ed mid per i n andfront and rear p0rti nsi-15 and 16respec tively. -"S aid front and rear portiengere inciined upwardly in pppsite directions: and at slightly different a nglestand'a the lneigiiis thereof-engage;against the unde glide ef jthe Ql O i lflariges of the seat irame members Miami 11 and are securedthetetq es g fo r instance byispet elding. Inthe eer pq 'tien f t e Pl t way b w ntit ideed s is Pr vid ide met d p t on 1 hav ng 5 2 enin 1 8 h e nt el pa t of Sa d mid tp or tioi l of thefseat frame pleteengages u ownd s fix d t9- t erfl ng -i pft sleeve 8. By reason of the incli o o t e plate po ti 5 l5 1 and 16 respectii ely,- the, .seat' fra e ,ie lpitched or tiltedfloimyqztidlj toward theigearalnd esseciated withwthe seat; frame me tioiled is e seatlcuship 1" member'lQ se -fitting. Within the upright flanges of the seet fii gmelmemdesired. i t t t i r -20, d e -e a whel ath-re t u pering pe t he b tto n 2 'O w th e i b n n eigene l c v it t t x remi y m y teti e ym eetetithe teem t" I t :be dositiqned between the earsSFpn the sleeve 90 here as to be removable therefljg n whert s0 hand wheel 24c. This sleeve which is interiorly threaded has opposed shoulders 611-- gaging opposite sides of said post portion so that while it may be rotated or turned therein, it cannot be moved endwise therefrom in a manner permitting its withdrawal. 7

25 indicates a bolt or screw, the top end of which is made in the form of an eye 26. Said bolt passes down through the opening 18 in the depressed portion 17 of the seat plate part 16 and a pin 27 which is seated on said depressed portion, with its ends extending under portions of said plate part at each side of said depression, passes through said eye so that the belt or screw may swing thereon. With this arrangement, the pin preferably has a driven fit at its ends under said plate portions, so that it cannot be easily displaced therefrom. The screw or bolt 25 has threaded engagement with the sleeve 23 of the handwheel 25 and normally its bottom end extends beyond the handwheel and may have a cross pin 28 which prevents disengagement of said screw from said sleeve and handwheel.

The top end of the back rest post is substantially straight and to said end is adjustably secured in any suitable manner a back rest member 29. As said back rest member forms no particular part of the present invention, it need not be described in further detail.

When it is desired to adjust the in or out position of the back rest, with reference to the seat, the handwheel is turned in the proper direction. Thus the sleeve 23 will climb up or down on the screw or bolt 25 which turns on the pin 27, to swing the post about its pivot with the ears 8 on the sleeve 8. In this manner the back rest is swung forwardly and rearwardly. By reason of the screw threaded engagement between the handwheel sleeve and screw or bolt, the back rest remains'in the adjusted position without the necessity of extra locking means.

The. number of parts employed are indeed few and may be readily assembled so that the cost of manufacturing the arrangement described is materially reduced and said parts are so correlated as to operate efficiently for the intended purpose.

While in describing the invention, I have referred in detail to the form, arrangement and construction of the various parts thereof, I do not wish to be limited thereto except as may be specifically pointed out in the appended claims.

I claim as my invention 1. A chair embodying therein, a seat frame including a plate and a seat frame post to which said plate is secured, a back rest post pivoted at one end with respect to said seat frame, a threaded member pivoted to said seat frame plate for a swinging movement about an axis parallelwith that of the back rest post, a hand wheel having a sleeve rotatively mounted with respect to said post and having operative engagement with said threaded member. 7

2. A chair embodying therein, a seat frame including a plate, a seat frame supporting post, a sleeve connecting said post and plate and having at least one car on the rear side thereof, a back rest post pivoted at one end to said car, a threaded member pivoted at one end with respect to the seat frame about an axis parallel with that of the back rest post and a hand wheel turnable with respect to said back restipost and engaged with said threaded member.

3. A chair embodying therein, a seat frame including a plate, a seat frame supporting post, a sleeve connecting said post and plate and having at least one ear on the rear side thereof, a back rest post pivoted at one end to said car, a pin carried by said seat frame plate and arranged parallel with the axis of the back rest post. a threaded member swingable on said pin, and a hand wheelturnable with respect to said post and engaged with said threaded member.

4.. A chair embodying therein, a seat frame including a plate, a seat frame supporting post, a sleeve connectingsaid post and plate and having at least one car at the rear thereof, said plate having a depressed portion therein, a seat post pivoted at one end to said ear, a pin disposed in said depressed portion of said plate, 'a threaded member having an eye swingable on the pin, and a hand wheel journalled in the back rest post and engaged on said threaded member.

'5.A chair embodying therein a seat, a supporting member therefor, means providing a back rest support, a pivotal connection between said supporting member and said means, a shaft arranged in said supporting member parallel with said pivotal connection, a screw threaded member operatively connected to said shaft so as to swing about the axis thereof, and a member secured in a part of said back rest support providing means and having an opening therein in which said screw threaded member has a screw threaded engagement for causing movement of said backrest support providing means about said pivotal connection.

6. A chair embodying therein a seat, a supporting member therefor, means provid ing a back rest support, a pivotal connection between said supporting member andsaid means, a shaft arranged in said supporting 129 member parallel with said pivotal connection, a screw threaded member operatively connected to said shaft so as to swing about the axis thereof, and a member secured in a part of said back rest support providing means. in a manner permitting a turning movement therein and with which said screw threaded member has a threaded engagement.

7. A chair embodying therein a seat, a

a providing means about said pivotal connec tion.;

supporting member therefor including a pair of laterallyfspaced, rearwardly extend- "fling portions, means providing a. backrest V support, a portionoiwhich is disposed be tween and has ffa pivotal 'connection with said laterally spaced, rearwardly extending portions of said supporting member, a shaft arrangedinsaid supporting: member parallelwith said pivotal connection, a screw 1 threaded member operatively connected to" said shaft so as to'swing about the axis thereof and an element secure'din said, back rest 1 support providing meansand havinga screw g threaded opening therein in which said screw threaded member is engaged for causing movement of said back rest support In testimony whereof, I have hereunto set my hand,this 9th day ofJune, 1928. TQRRIS ALFREDS

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