US1664059A - Folding camp chair - Google Patents

Description

March 27, 1928.

J. L. CABLE FOLDI NG CAMP CHAI R Original Filed Sgpt. 25. 1924 2 Sheets-Sheet 1 March 27, 1928. 1,664,059

. J. L. CABLE FOLDING CAMP CHAIR Original Filed Sept. 25, 1924 Patented Mar. 27, 1928.

PATENT OFFICE.

TION, OF BOSTON, MASSACHUSETTS; A COT-ORATICN OF ,MASS ACHUSETTS.

. ie oLn'IiiG CAM? cim IR.v

Application filed Septeihbr lTo. Renewed June 7,1927.

' This iiiyeiition pri' marily i'elates to that class of folding chairs, known as camp chairs, or stools, which. comprise two pairs of pivotally connected crossed legs, the legs each pair of which are connected by a cross bar between Whicha'canvas seat is t h d a a Priorto niy invention, chairs of this chat ilc ter hat e t sdally been made from ood, end, tor this reason, l'ac'k strength and dure;- bility, andthe primary object ofrn'y invention is "to provide a practicable manner of constructing such a. chair of seini-tiibular met- 11,150 that it "Will be much more durable thantho'se which are cens'trncted ot wood and may be n'apuiactnredat no snbstantial increase inexpensefas compared with those having a 'i'vo'oden frame. Also ito' pr'ovidefa deyice e f this character 'whici Will haye si'iificiently rigid joints between the legs: and the cross'bars which support the canvas to withstand any lat erall'stifaini in the direction of the' cros's bai's to iyhich they are likely to befsti'bjected, that, {under all ordinary chii' it tioiis "of rse thefli gs cross bars will be helfdat ri it an gles to "e'alcl'i other. Other objects "of m inijeiition are to provide 'a in'p chair which is provided with fdrrri of ha a ifoiiii'of'j-0int;between the cross bars and legs which permits ready disch'rinection "at one" endfot "the baits; to p'eirnitfoldiiig of the bai s and legs in v ,c'oirifiz'uit form, and'yvhich is adapted "for teed-y relc'onnection, Tand, when reconnected, ivill provide asiifiicientl'y rigid joint to f ulfillthe requirements above indicated. f v

Ific'cornplish these objects in\ the manner the, eonipanying' drawing in which;

1 and 2 are'eiid a'ndside elevations cheir in pest gs 'T and S- I'a re longitudinal sectional hereinafter described, and as illustrated in r Fig. 10 is a detail endjvie'w of one of the joints. r M

Fig; 11 is a side viewjof a modification of the invention. p f l j r In "acc0rdance- 'With iny invention, the'legs and cross bars otthe chair are'formed of metal bars in semi-tubular form, flat metal strips being bent to proyide a semi-cylindrical 'rniddle portion and parallel side portions; so that greatly increased rigidityis secured; Inth'e construction or" the chair two pairs of legs 1, 2, 3, and 4 are provided the 1 and 3 of each pair being formed two sections Which'are connected by ofl' s et metal straps 5, which are riveted to opposite sides thereof, theiothe r legs'2. and 4; of each pair being of continiijoiis strips of "ine tal which are extended between said' straps 5 and are connected thereto by piyo'ts 6 which extend through each, pair of straps imidthrough the sideso'f the'legsflahd i, this arrangern'ent perinittingeacl i" plairfof' let's be folded side side, Cylindrical riibher ciishions" 7 are preferably inoiinted between the" Sides of the legs at their'lowereiids. M 1

Said legs are each prcvided at its Upper end With-a flat end portion, or tongue 10, 20, 3O a nd40 respectiyelygeachof which is disposed" in a plane approximately :inidi vay betweenthe edges of: thesides and the middle of the semi-cylindrical portion, said tongues being preferably provided "in the operation of bending a'fiat strip into semitnbular'form by'leaving an n'nbent end porg tionr su'flicieht to form the same- The end edges otsaid tongues are cutoff square so that they ar'e perpendicular to the side edges thereof. The cross bars 8 and 9 are bent in seiniti bnlar .forn throtighout their interinediate portions, a nd' each bar has both Y of its end portions flattened, or bent sharply along its Tmiddle line, "to form sockets 80,

81- find: 90, 21, the sides of which are fiat 1 and parallel and separated by a distance but"slightly greater than the thickness of the in'e'tahto permit the tongues on the upper eii'dsof the leg sto be fitted "closely therein, with their end edges, throughout the length thereof, engaged withthebotto' n Qfsaid sockets, so fas to provide a firin hearing, as

showngin Figs. 1, and 7. to 10. In assembling the parts, the tongues 10 [and 20 of the legs3 and are' insertedinthe Sockets 81 and 91 respectively "at one end of each 40, pivot .bolts being arranged adjacent the inner edges, or the side edges of said tongues which are nearest thorother pair of legs, and in position to permit the side bars to be swung down against the inner sides of i said legs, the transverse elongation of the apertures 13 permitting limited longitudinal sliding movement of the cross bars on the ends of the legs to which they are connected, for the purposes to be explained. A locking pin 14 is also fixed in the sides of each of said sockets 81 and 91. adjacent the ends thereof and a notch 15 is formed in the outer edge portion of each tongue and in position to receive each pin 14, respectively, when the bar is in a position at right angles to the leg. A locking pin 16 is fixed in the sides of the opposite sockets 80, 90, adjacent the end edges and the bottoms thereof and correspondingly disposed notches 17 areformed in tongues 10 and 20of the legs 1 and 2, which extend from the end edges thereof at right angles thereto. The outer portions of the notches 15 and 1'? are both somewhat enlarged to permit ready entrance of the pins 14 and 16 therein, the inner edge of each of the notches 17, or its edges next the opposite legs being beveled to a somewhat greater extent than the other edges of the notches to fornrcam faces 18. A canvas 19 is attached to thecross- bars 8 and 9 to form the seat, and may be held.

in position thereon by the pins 14 and 16, which are preferably riveted against it. A pair of jointed braces 21 of common form 'connect the opposite legs adjacent their are broken, the legs may be pushed into lower ends.

As shown in Fig. 4, the cross-bars are adapted to be folded down against the sides of the legs 1 and 2, and when the braces 21 close proximity and the whole chair folded into a compact bundle. In setting up the chair the legs will be opened and held apart' in position by the braces 21 and then the cross bars will be raised and the tongues 10 and 20, on the opposite legs from those.

to which'the cross bars are permanently connected, will be pressed into the sockets.

and 90. To do this the cross bars will be swung upward and be pushedlengthwise to permit the pins 14 to clear the outer side edges of the tongues 30, 40, and the tongues 10, 20 are pushed into the sockets 80,

.90 until the edges thereof engage the pins 16, sufficient looseness of the pivot 12 in its aperture 18 being permitted to permit the opposite ends of the bars to be raised slightly above the right angular position. In this position the pins 14 will be opposite the notches 15, the pivot 12 will be at the ends of the aperture 13 next said notches 15, and the pins 16 will be engaged with the inclined edges 18 of notches .17 as shown in Fig. 7; The free ends of the cross bars will thenbe pressed down until the pins 16 engage the bottoms of notches 17. By this movement the inclined edges 18 of said notches 17 will have a cam action on thepins l6 and draw the cross bars longitudinally, so that the pins 14 will be drawn into the notches15. By the time the pins 16 are engaged with the bottoms or the notches 17, the pins 14 will be engaged with the inner ends of the notches 15 and the bottoms of all the sockets will be firmly engaged with the top edges of all the tongues throughout the entire lengths thereof, as shown in Fig. 8.- In this position the pins 16 will be engaged with portions or" the edges of the notches 17 i which are at right angles to the top edges of the the sides of the notches 15 which are parallel to said top edges and the pivotb-olts 12 will" tongues, the pins 14will be engaged with be engaged with the opposite ends of they apertures 13, from the notches 15.

lVhile, with the above described construe V tion, absolute rigidity is not secured, or considered essential, yet theparts are effectively braced against appreciable racking, or canting of the legs out of perpendicular relation to the cross bars, this being prevented by the engagement of the locking pins withthe legs, and of the top edges of the legs or tongues. with the bars in the manner above indicated.

If it is not desired toprovide a const-ruction in which all the parts may be folded together in a roll, so that they lie side by. side, but merely to-have the legs fold, and to provide a rigid and permanent connection;

between each end of the side bars and the legs, then the tongues on the legs will be in-:

serted in position in the sockets and several. rivets 22 will be passed through the sides of the socketsand intervening tongues, so that,- when the riveting operation has been per-1 formed, all these parts will be firmly clamped together as shown in Fig.11. The advantages due to the engagement of the ends of the legs throughout the entire length, in bracing these joints against distortion from the right angular position is imtion with a folding table without substantial variation thereof, as a table top may o e viously be substituted for the canvas on the cross bars, but I consider the construct on provide a semitubular main portion and a continuously extndingflattened tongue portion at its upper end, a pair of cross bars each consisting of a sheet metal stripbent to.-

form a semitubular, intermediate portionand socket portions at each end having parallel sides, said tongues-being fitted-between the sides of the correspondingsockets and" having their end edges engaged with'the bottoms of said socket-s throughout approximately the length thereof and means engaging; said sides and tongues tohold said bafrsand legs in perpendicular relation.

21 A fol ling supporting framehavi-ngtwo pairs of pivotallyconnected crossed legs each comprising a sheet metal strip bent to provide a semitubular-main portion anda continuously extending fiat tongue atits upper end having-its upperr edge-disposed at right angles to the sides of'said-mainportion, a pair ofcross bars each'consisting of a sheet metal strip bent to form :a semitubular intermediate portion and relatively flattened socket portions at each; end, each having parallel sides engaged with thesides of said tongues and an intermediate bottom engaged with the end edges ofsaid-'tongues-throughout approximately" the length thereof and means engaging saidtongues'and the sides of said sockets to hold the-same in said position.

8. A folding supporting frame having two pairs of pivotally connected crossed legs each comprising a sheet metal strip bent to provide a semitubular main portion and a continuously extended flat tongue having a straight upper edge disposed at right angles to said main portion, a pair of cross bars each consisting of a sheet metal strip bent toform a semitubular intermediate portion and socket portions at each end, each having parallel sides between which said tongues are adapted to be closely fitted and a bottom at the middle longitudinal line of the bar with which the end edge of the corresponding tongue is engaged throughout its length, and pins extending through the sides of each socket and the intervening tongue to lock said tongues in their sockets.

4. A folding supporting frame having two pairs of pivotally connected crossed legs each.

comprising a sheet metal strip bent to pro-J vide a semitubular main portion and a continuously extended flat tongue having a straight upper edge disposed at right angles to said main portion, a pair of cross bars each consisting of a sheet metal strip bent to form a semitubular intermediate'portion and socket portions at end, each having parallel sides between which said tongues are adaptedtobc closely fitted and having an intermediate bottom with which the end edge ofthecorresponding tongue is engaged -when the bars are in positionof use thereon,

a pivot pin-extending through the sides of the sockets at one end of each bar and through the-corresponding tongue and arrangedto permit said bars to swing thereon between said position of use and a folded position at-the side of the legs towhich they are'pivoted, and locking means carried by the sockets at the opposite ends of said bars arranged to engage the corresponding tongues to,lock thebars thereto when in said position of use.

5. A foldingsu-pportingframe having two pairs of pivotally connected crossed-legs each leg comprising a sheet metal strip bent to provide a semitubular main portion and a continuously extending tongue portion at the upper end thereof, a pair of cross bars each consisting of a sheet metal strip bent to form a semitubularintermediate portionand socket portions. at each end having parallel sides between which said tongues are fitted and intermediate bottoms engaged by the end edges of-said tongues Whensaid bars and legs are inperpendicular relation, a pivotal connection between the sides of-the sockets atone endof the bars and the corresponding tongues arranged adjacent the inner edges of the tongues, to permit said bars to be swung from said perpendicular position to a folded position at the innerside' of the legs to which they are pivotally connected, and constructed topermit limited longitudinal movement ofthe bars transversely of the legs, and means Jul) on the sides of the sockets at the opposite ends of the bars arranged to be engaged with the corresponding tongues on longitudinalmovement of said bars to lock the same in said perpendicular relation.

6. A folding supporting frame having two pairs of pivotally connected crossed-legs each leg comprising a sheet metal strip bent to provide a semitubular main portion and a continuously extending tongue portion at the upper end thereof, a pair of cross bars each consisting of a sheet metal strip bent to form a semitubular intermediate portion and socket portions at each end having parallel sides, between which said tongues are fitted, and intermediate bottoms engaged by the end edges of said tongues when said bars and legs are in perpendicular relation, a pivotal connection between the sides of the sockets at one end of the bars and the corresponding tongues arranged adjacent the inner edges of the tongues, to permit said bars to be swung from said perpendicular'position to a folded position at the inner side of the legs to which they are pivotally connected, and constructed to'permit limited longitudinal movement of the bars transversely of the legs, said tongues to which said bars are pivotally connected each having a transversely extending recess opening to the opposite edge thereof from said pivotal connection and the sides of each of the corresponding sockets of said bars having a locking pin arranged to be carried pairs of pivotally connected crossed-legs each leg comprising a sheet metal strip bent to provide a semitubular main port-ion and a continuously extending tongue portion at the upper end thereof, a pair of cross bars each consisting of a sheet metal strip bent to form a semitubular intermediate portion and socket portions at each end having parallel sides, between which said tongues are fitted, and intermediate bottoms engaged by the end edges of said tongues when said bars and legs are in perpendicular relation, a pivotal connection between the sides of the sockets at one end of the bars and the corresponding tongues arranged adjacent the inner edges of the tongues, to permit said bars to be swung from said perpendicular position to a folded position at the inner side of the legs to which they are pivotally connected, and constructed to permit limited longitudinal movement of the bars transversely of thelegs, said tongues to which said bars are pivotally connected.

each having a transversely extending recess opening to. the opposite edge thereof from said pivotal connection and the sides of each of the corresponding sockets of said bars having a locking pin arranged to be carried A said top edge, andlocking pins in the sides of the corresponding sockets and arranged to be engaged with said oblique edges to draw said bars longitudinally lnto locked position.

8. A folding supporting frame comprising a pair of semi-tubular metal side bars, two 7 pairs of semi-tubular metal, pivotally connected crossed legs having their upper end portions flattened to form tongues, the end edges of which are disposed at right angles to the sides of the legs, said tongues being closely fitted'between the sides of said bars at the end portions thereof respectively with their top edges longitudinally engaged with the middle of said bars throughout the length of said edges, and a pivotal connection between one end portion of each bar and the corresponding tongues of said legs to permit the bars to be folded against said legs;

In testimony whereof, Ihave signed my name to this specification. 7

JULIUS L. CABLE.

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