Патент USA US2112454код для вставки
~ March 29, M.FOLDING A’ DAVIS COT Filed March 9, 1934 ' 2 Sheets-Sheet 1 IN VEN TOR. ‘March 29, 1938. ‘ I ’ _ M,A_DAV,S- 2,112,454 FOLDING COT Filed March 9, 1934 _ 2 Sheets-Sheet 2 FM?” W Q- M’ IN VEN TOR. Patented Mar. 29’, 1938 2,112,454 ‘UNITED STATES ' PATENT OFFICE 2,112,454 FOLDING COT Mansell Allan Davis, (Los Angeles, Calif. Application ‘March 9, 1934,. Serial No. 714,845 .. 5v Claims. (Cl. 5-114) My invention relates to new and useful im lower end of one of the corner legs of a folding provements in the construction, methods of fold cot. Fig. 13 is a fragmental sectional side elevation ing and setting up of folding cots. ‘ My invention relates to improvements in fold 5 .ing cots, comprising a, ?exible top portion en gaged to side rails which are detachable from a supporting frame, which may be folded from an extended lengthwise and crosswise position to practically a bundle of parallel bars. . My invention relates to the construction and method of extending the fabric top of a folding cot, by means of toggle joints in the cross sections of a supporting frame. My invention relates to the construction and 15 methods of attaching the fabric top of a folding cot so that it adapts itself to the human form. My invention relates to the construction and method of adapting‘ the supporting frame of a 10 folding cot to uneven ground. ‘ " . ' My invention relates to the details of construc tion and methods of attachment of the various parts of a folding cot, by which the supporting frame and detachable top can be folded or extend 20 ed and set up. I attain these objects by the construction illus trated in the accompanying drawings, in which Figure 1 is a perspective view of afolding cot. Fig. 2 is a fragmental plan view of the method of attaching the fabric‘top of a folding-cot to the supporting side rails. 30 ' - Fig. 3 is a front elevation of the side section of a folding cot, partially folded. ‘ ’ of a toggle joint and engaging clamp on a cross bar of a folding cot. 5 Fig. 14 ‘is a front fragmental elevation of the crossing of two brace rods, showing the method of their pivotal engagement. . Like reference characters refer to like parts in the several ?gures of the drawings. 10 This invention was made to meet the demand for a folding cot, light in weight, compact in size when folded and strong and comfortableiwhen setup for use. This invention makes possible an economical folding cot to manufacture. which .15 can be quickly set up and quickly folded. Inthe manufacture of the folding cot, two parts are assembled separately-—a top or bed part and a supporting frame, Fig. 1. The top part has two parallel side rails l and 2 of channel cross section 20 construction, each consisting of two sections I’ and I” and 2' and 2" connected pivotally by hinge links 3 and 3' respectively, which are sufli ciently narrow to allow channel edges of each pair to pass each other and fold parallel compactly as .25 ‘shown in Fig. 4. Each side rail l and 2 straight ened out and positioned parallel to each other carries a line of eyelets 4 in Fig. 2 on the, inner side of said rails relative to each other Fig. 1. These eyelets 4 are formed by loops in‘wire 5 ex- 30 tending through apertures 6 in said side rails ‘from the inside of said channel structure. ‘The ‘ Fig. 4 is a front elevation of the hinge section of the side rails of a folding cot. . Fig. 5 is a side elevation of a leg of a folding assembly of the top- portion of the folding cot comprises side rails I and 2 straightened out'and spaced apart the desired width of a cot, with the 35 I cot showing its attachment to side rail at the top, ‘eyelet side of the rails facing each other; between to cross bars at the side and foot at the ‘bottom. Fig. 6 is a front elevation of a cross section of the rails l and 2 is positioned a rectangular piece of ?exible fabric 1, about the length of said'side rails and slightly narrower than the distance be tween the side rails l and 2, with a row of eye- 40 lets 8 along each longitudinal edge of fabric 1 staggered relative to eyelets 4 along the side rails. a folding cot with toggle joint in the stage of being extended. . ‘ Fig. 7 is a fragmental elevation of the channel view of a leg of a folding cot, enclosing a cross'seo tion of a cross bar resting on inwardly formed ?anges of said channel structure of'a leg. ' Fig. 8 is a fragmental front elevation of the top of the middle leg of the side section of a‘ folding cot. Fig. 9 is a front elevation of a cross section of a folding cot partially folded. . Fig. 10 is a cross sectional plan view of. a leg, thrust bar and tie rod in a folded condition; ‘Fig. 11 is a cross sectional view of a leg of a These eyelets are formed by slits cut at the de- ‘ ‘sired intervals into the hem 22 along the longi tudinal edges and at right angles thereto; the 45 outer ends ofedge said of vslitssaid are hem, closedand by wires are removable 23 in the through the open ends of. said hems 22 when it is desired to wash said fabric 1. Through eye lets 4 and 8 cord 24 is laced alternately thus en- 50 folding cot showing method of attaching brace gaging fabric 1 to side rails I and 2 on the re spective sides of said fabric. This method of lac ing a fabric bed portion to supporting side'rails, rod. makes possible the adjustment of the cross tene . ' Fig. 12 is a fragmental front elevation of the sion of said fabric 1. relative to any stretching or 55 2 ‘2,112,454 shrinkage. The slippage of cord 24 through eye lets 4 and 8 makes the fabric bed portion ‘I adapt able to the human form when a person is reclin ing upon it. The ends of the cords are convenient ly engaged to the ends of side rails I and 2 by a (25) wedge shaped notch in each end thereof. The slippage of cord 24 through eyelets 4 and 8 is controlled by an occasional cross lace or knot ally engages two adjacent legs ‘I 1 near the top of one leg and near the bottom of the other. This engagement is effected by inserting the ends of said brace rods bent at right angles into elongated slots 34 behind ba?le ?anges 35 on the outer face of said legs II, and giving them a quarter turn behind baffle 35 before said brace rods 28 and 29 are riveted at their crossing with their loops 36 15 frame. held parallel against rotation by plates 33. This method of assembling the brace rods 28 and 29 10 to the legs and to each other, not only prevents the several parts from separating, but provides a pivotal and perpendicular movement to the ends of said brace rods 28 and 29, and holds them in the plane of the assembly of said trusses by 15 The supporting frame, when extended is rec tangular in plan, and may be considered from two aspects, namely a plurality of cross sections and of side trusses. The cross sections of the sup 20 porting frame comprise two opposite legs II en gaged to each other by means of a telescoping tie rod I3 formed of two rods coiled around each other at their inner ends at I4 and pivotally engaged at their outer ends to legs II respec 25 tively near their bottom portions Fig. 6. Posi tioned above cross tie rod I3 is thrust crossbar the ends of said brace rods, Figs. 11 and 12. At the top of the center leg I I the ends of said brace rods are limited in their perpendicular move ment by shorter slots 31 and 31', but held to a 20 movement in the plane of assembly by short ?anges 38 and 38’, Fig. 8 when they are being folded. Brace rods 28 and 29 are provided with hinges 3! between their points of crossing and their engagement to the top parts of legs I I. Fig. 3 shows brace rods 28 and 29, and legs I I assembly 26 of Fig. 2. This top or bed portion, with rails I and 2 folded at hinges 3 and 3', and fabric ‘I rolled about them makes a small light package. The side rails I and 2 have apertures 9 for receiving projections I9 near the top of legs I I, Fig. 5 when the top portion is being attached to the Supporting means of ?ange baffles 35 overlapping a section of I5 having toggle joint I6 with locking clamp I'I partially folded. When completely folded legs I I, operated by spring I8 Figs. 6 and 13 between the ends of said thrust bar I5 which are pivot -30 ally attached to legs II, one at each end of said brace rods 28 and 29, and thrust bars I5 and tie cross bars I5. The methods of attaching tie rod I3 and cross thrust bar to the legs are shown in the detail drawing of the leg II in Fig. 5, in which cross thrust bar I5 extends into the channel of the leg structure, pivotally attached thereto by rivet 2| and is controlled against a downward movement beyond a right angle to the leg by an abutment of the end of bar I5 against the inner wall of the back of the channel structure of said 40 leg at 20, and by inwardly formed ?anges I9 Fig. 7 from‘ the sides of the channel formed legs. Tie rods I3 are pivotally attached to ?ange 21 Fig. 10 projecting centrally from the back of the channel form of leg I I, so that the thrust bar I5, tie rod I3 and leg II will fold together in compact manner as shown in Fig. 10. When the cross section of the supporting frame is in use the top of the legs at each end thereof are held together against outward movement by the 50 top part of the folding cot, and the bottom. of the legs are held by tie rods I3 against outward move ment. Between these tie engagements, thrust bar ‘I 5 with its toggle joint action applies an outward pressure to the limit of its length. With the ends of thrust bar I5 limited to a right angle in the downward movement of said bar, a very rigid construction is obtained, which holds the cot against side sway. Figure 9 shows the cross section partially folded. When folded the legs 60 are in alignment making bundle compact. In considering the side aspect of the supporting frame, we have, in combination with the side rails of the top portion, a plurality of trusses, comprising vertical legs I I engaged to each other adjacently by side rails I and 2 across the top of 65 said legs, by the insertion of projections II] at the top of legs II into apertures 9 in the outer side of side rails I and 2, Figure 5, and said adjacent legs II are also attached to each other by two diagonally positioned brace rods 28 and 70 29 crossing and pivotally engaged to each near their centers by looping around rivet 32 which positions concaved plates 33 around said loops Fig. 14 on both sides of said crossing of brace rods 28 and 29. Each brace rod 28 and 29 pivot rods I3 all come together substantially parallel into a very small bundle, and when rolled into the z‘. top fabric with the folded side rails, a small pack age is provided for handling. To set up the cot from a folded condition,-— ?rst take the supporting frame, open the cross sections by pulling the legs apart crosswise, then 7 holding the cross section nearest the operator, cast the rest of the frame outward, and set it down with the legs in a vertical position. Then unroll the fabric of the top portion from around the side rails, straighten out said side rails and the _ fabric. between them, place the channel struc~ 'ture of the side rails over the tops of the legs on each side of the supporting frame, and insert projections ID at the top of the legs through aper tures 9 in the side rails correspondingly. Then straighten out toggle joint I6 of the several cross sections. This communicates a spreading thrust between the side rails, which stretches the ?exible fabric bed portion tov a predetermined tension. The cot is thus set up for use. It has been made 50 adaptable to an uneven ground foundation, by means of the hinges in brace rods 28 and 29, and by the perpendicular movement of the ends of said rods, made possible in the elongated slots 34 of the end legs II of the side trusses of the sup porting frame. The adaptability of the ?exible fabric bed portion to the human form, by means of my method of lacing to supporting rails, pro vides a very comfortable cot to rest upon. The folding cot is very light in weight, made possible by the channel structure of many of the metal parts. The legs II are of double channel con struction; a small channel formed in the back of the larger indicated 39 in Figures 5, 10, 11 and 12. 65 What I claim and desire to secure by Letters Patent is: 1. A folding cot comprising a. rectangular de tachable top portion in combination with a sup porting frame constructed of a plurality of cross 70 sections, said sections having a vertical leg on each end thereof, an extensible tie rod of pre determined length when extended, one of said tie rods being pivotally connected to the vertical pair of legs of a cross-section adjacent the lower ends 75 3 2,112,454 ’ of the legs and a thrust bar including a toggle lately connected means and the legs providing a joint between the ends thereof, one of said bars limited movement of the pivots longitudinally of said legs. being pivotally connected to each pair of legs of a cross-section at a point between the tie rod and the detachable top portion. ' 2. In a folding cot, the combination of a de tachable top bed portion, and a supporting frame comprising a plurality of cross sections consisting of a cross bar of two parts each of channel formation, pivotally connected to each other at their inner ends, one part adapted to fold into the channel structure of the other part, and pivot ally connected at their outer‘ ends to legs of chan nel formation, into which said cross bars can 15 fold, and an extensible tie rod pivotally connected 4. In a folding cot structure, a supporting frame adapted to receive a top bed portion, said frame comprising end cross sections and an inter mediate cross section, each cross section compris ing a pair of vertical legs, an extensible tie bar secured adjacent the lower ends of the legs, a ~ hinged cross bar comprising a pair of sections, 10 the outer ends of which are pivoted to the legs at points between the tie bar and the top bed por tion, said cross bar sections being pivoted to each other whereby they may be moved into longi tudinal alignment substantially parallel to the tie 15 at its outer ends to said legs, and adapted to bar, and means for locking said cross bar sec fold into the channel structures of said cross bars tions in said position of longitudinal alignment. and said legs. 3. In a folding cot the combination of a de 20 tachable top bed portion having longitudinal side rails, a plurality of transversely extending fold~ able cross sections providing supporting legs for the top bed portion, means articulately connect~ 5. In a folding cot the combination of a de tachable bed portion, longitudinal side rails therefor, a supporting frame to which the longi 20 tudinal side rails with its top are connected, said frame including a plurality of cross frame sec tions, each section having a. pair of legs, an ex point intermediate adjacent cross sections, means pivoting the rods together at said point of inter section, the portion of rods extending beyond the tensible tie rod of ?xed length when extended and engaging the legs adjacent the lower ends to pre 25 vent them from spreading, an intermediate fold ing brace pivotally engaging the legs at its ‘oppo site ends intermediate the top portion'and the point of pivot being shorter than the length from tie rod, said intermediate folding brace having ing said folding cross sections, said means in 25 cluding a pair of rods crossing each other at a 30 the pivot to the legs of adjacent cross section and supplemental rod lengths pivoted to said short sections and to the legs of adjacent cross sections and means included in the pivotal con nections between the rod portions of said articu abutments contacting the legs when the brace 30 members are in longitudinal alignment in their bracing position whereby the brace will hold the legs against collapsing. MANSELL A. DAVIS.