US2710411A - Sofa bed with lock - Google Patents

Description

June14, 1955 R. GOODMAN 2,710,411

SOFA BED WITH LOCK Filed May 29, 1953 4 Sheets-Sheet 1 INVEN TOR.

Robe/v Good/27am BY ,1 RNEX June 14, 1955 R. GOODMAN 2,710,411

SOFA BED WITH LOCK Filed May 29, 195:5 4 Sheets-Sheet 2 FIG..4

275 27a 73 5x 4 F|G 24 INVENTOR ROBERT GOODMAN BY LQ,

ATTORNEY June 14, 1955 R. GOODMAN SOFA BED wmx LOCK 4 Sheets-Sheet 3 Filed May 29, 1953 l N VE NTOR $BERT GOODMAN ATTOZN EY June 14, 1955 R. G-OODMAN 1 son BED WITH LOCK Filed May 29, 1953 I 3 I N VENTOR ROBERT GOODMAN ATTORNEY 4 Sheps-Sheet 4 United States Patent SOFA BED WITH LOCK Robert Goodman, Philadelphia, Pa.

Application May 29, 1953, Serial No. 358,268 1 Claim. c1. s 13 My invention relates to a combination sofa and bed,

known as a davenport, and relates particularly to the articulated bed construction and locking mechanism so that an accidental opening will not be effected.

Heretofore, davenports having full size beds built therein necessitated extra width or depth to accommodate said full size beds and the mechanism'for the operation of the folding mechanism. The extra width entailed extra use of materials for outer frame construction and extra materials for covering of the wider sofa arms, as well as extra costs for labor entailed in building such wider sofas.

It, therefore, is an object of my invention to provide in a davenport of conventional width a full size bed eliminating extra materials in construction as well as the extra labor costs involved in building a wider sofa.

Another object of my invention is to provide a davenport having a full size bed built therein of conventional outer appearance.

Still another object of my invention is to provide a davenport with a full size bed built therein which is positively locked against unfolding, but which is readily and easily unfolded when properly manipulated.

Another object of my invention is to provide in a davenport closing mechanism wherein the pivot point floats from one side to another side in order to reduce the width of the davenport.

Other objects of my invention are to provide an improved device of the character described, that is easily and economically produced, which is sturdy in construction, and which is highly efiicient in operation.

With the above and related objects in view, my invention consists in the details of construction and combination of parts, as will be more fully understood from the following description, when read in conjunction with the accompanying drawings in which:

Fig. 1 is a side elevational view of a davenport embodying my invention in a bed position and showing the width of the frame.

Fig. 2 is a fragmentary perspective view of the davenport showing the foot section partially folded over.

Fig. 3 is a perspective view of the davenport with the foot section completely folded over.

Fig. 4 is a fragmentary perspective view of the davenport in a partially closed position.

Fig. 5 is a fragmentary perspective view showing the locking members and the link which moves the pivot for the keeper hook.

Fig. 6 is a fragmentary side view of the head and body sections with a keeper hook used to close the intermediate leg of the bed and to hold the entire bed frame in a locked position.

Fig. 7 is a fragmentary detailed side view of the L- shaped closing mechanism used to close the articulated sections.

Fig. 8 is a detailed side view'of the L-shaped closing mechanism.

Fig. 9 is a fragmentary detailed inside view of the L- shaped closing mechanism and the manner of joining the bed frame to the sofa frame.

Fig. 10 is a fragmentary detailed outside View of the L-shaped closing mechanism.

Fig. 11 is a fragmentary detailed side view of the bed section showing the position of the foot section holding members when the bed frame is folded.

Fig. 12 is a fragmentary detailed side view of the bed frame showing the foot section folded over and the section locking mechanism partially actuated.

Fig. 13 is a fragmentary view of the bed frame showing the section lock with the keeper hook omitted.

Referring now in greater detail to the drawings, wherein similar reference characters refer to similar parts, and also bearing in mind that the bed frame has similarly constructed parallel sides upon which a bed spring (not shown) is supported, I show a davenport having an outer frame section, generally designated as A, and a bed frame having a head section, generally designated as B, a body section, generally designated as C, an intermediate section, generally designated as D, and a foot section, generally designated as E; all of the aforementioned sections being articulated together and being adapted when open to lie in substantially co-planar relationship to serve as a bed, and when closed to serve as a resilient seat section for a sofa cushion.

It is to be noted that the outer frame section A is of conventional sofa frame construction having a back frame A1, an arm frame member A2, and cross brace member A3. This outer frame may be made of any suit able material such as wood, steel, or aluminum. The width of the frame A is illustrated in Fig. 1 and with my invention is reduced as compared to the prior art davenports for the same length of bed frame.

The head section B of the bed frame consists of a support member 14, made of steel angle which is connected to the outer frame A by a short arm 11 which has a pivotal connection PI on the support member 14, and whose other end is joined to approximately the center of the vertically extending cross member A3 of outer frame A by means of a pivoted connection P2. The support member 14 also is joined to the back rest frame Al near its bottom by a long arm 10 whose one end is pivotally joined at P3 to the support member 14 a distance approximately equal to the length of the short arm 11 along support member 14. The other end of long arm 10 is pivotally joined to the back rest A1 at pivot P4. The other end of the support 14 is joined by a pivoted connection P5 to the support member 38 of the body section C. A helical extension spring 16, whose function will be hereinafter explained, is connected between the bottom of outer frame A and short arm 11.

The body section C consists of an angle support member 38 made of angle iron whose length is substantially the same as the width of the sofa and which is pivotally joined at the pivot P5 to the support member 14 of the head section as hereinbefore mentioned. The other end of support member 38 is pivotally joined at pivot P7 to the intermediate section D. The body section C is provided with a leg 39 which is pivotally connected at the pivot P10 to the support member 38 at about the midpoint of the entire bed frame to give greater rigidity and support to the bed frame.

A front board is fastened by a suitable means to J a support 48 of a closing linkage consisting of link mem- J other end of the link 50 is pivoted at P21 intermediate the ends of the leg 39.

The foot section B consists of a curved support member 42 which is bent upward at an angle of approximately degrees for the last quarter of its length. The straight end of curved support member 42 is pivotally joined at the pivot P8 as seen in Fig. ll to the front board support section D. while its bent end is pivotally joined at P9 to a leg 43. The leg 43 has a ground engaging portion 4313 at one end and a sideways extending stud or lug A which is adapted to be engaged by a keeper hook 24. The foot section side bar 44 of the foot section C (which is bent downwardly for about its length at 30 degrees) is pivotally joined at P20 to one end of the intermediate section D. The foot section frame 44 has the leg 43 pivotally connected thereto at pivot P11. The foot section frame 44 is provided with a mattress guide at its end which need not be described in great detail here. The leg 43 is provided with the lug 45A at its upper end whose function will hereinafter be described.

A keeper hook 24 is pivotally engaged at P12 through guide slot 27 in support member 38 to one end of a keeper hook actuating link 41 whose other end pivotally is connected at P13 to the front board support section D. Another keeper actuating lever 29 has one end pivotally joined at P14 to support member 14 while the other end of said keeper actuating lever 29 is pivotally connected to keeper hook 24 at P15.

The bottom of leg 39 is pivotally joined at P22 to one end of a closing link 52 whose other end is pivotally joined at P23 to the short arm of an L-shaped closing mechanism 26 which is pivotally joined at P24 at the vertex of the l. to support member 38. The intermediate portion of the long arm of the closing mechanism 26 is so constructed that it can rotate as well as slide on the rollers 31A in the channel member 31. The end of the long arm of closing mechanism 26 is pivoted at P24 to a bed frame C. The channel member 1 is fastened to the outer frame A so that its groove 31 is at an upwardly inclined angle with respect to the bottom of outer frame A. A spring 36 is fastened at one end to the top of bed frame support 33 while its other end is attached to closing mechanism 26 a short distance from its pivotal connection P24 to support member 38.

The arm 26 is pivotally connected at 318 to rollers 31A which ride in groove 31 and the bottom of the arm 26 is pivoted at 26C to a pivoted link 26A which is pivoted at 268 to a fixed bracket outer frame A.

Now when the bed frame is folded from the open position shown in Fig. l the foot section B is lifted to the position shown in detail in Fig. ll whereupon the leg 43 is caused to fold over due to the action of the link 42 acting through pivots P8 and P9. Further folding of the foot section B pushes the keeper hook actuating link 41 causing one end of keeper hook 24 to slide along guide slot 27 from end 273 to 27A. The other end of keeper hook 24 rises in a vertical manner placing it in a position to engage the lug 45A located at the end of the leg 43 as shown in Fig. 11.

The intermediate bed section C is then lifted as shown in Fig. 4 which brings into play closing mechanism 26 which pivots on its rotating sliding point in groove 31 to a direction perpendicular to the bottom of outer frame A pushing the short arm of lever 26 toward support member 38 thereby pulling in link and the intermediate leg 39 and positioning the front board 45 parallel with front board support member 40 or the intermediate section C. At the same time the support member 38 of body section C bends at an angle to the support member 14 at its pivot at PS, the keeper actuating lever 29 pushes keeper book 24 forwardly thereby closing the keeper hook firmly about the lug 45A as shown in Fig. l1.

The whole bed frame is then pushed toward the head rest AI of the outer frame A causing the folding mechanism short arm to travel beyond support member 38 fully closing intermediate leg 39. At the same time the support member 14 is pushed on its pivots PI, P3 back of the head rest AI. Simultaneously spring 36 exerts a downward pressure to pull the bed frame onto bed frame support 18. The pulling down of the bed frame B causes the support frame member 14 or the head section which is rigidly locked at an angle to the body section C or the support member 33 by means of the lug 45A and the book 24 to move back of the head rest AI. The spring 16 acts as a counterforce to the tension of spring 36 so there is a smooth continuity between these operations.

The locking mechanism 26 now has its short arm perpendicular to the support member 38 and its long arm parallel to support member 38 with the support member 38 resting on the frame stop 33 and its slidably pivoted point at its lowermost position in channel 31 which serves to lock the bed frame onto outer frame A until the front board 45 is lifted and pulled outwardly at which time a reversal of the operations described ocours.

It should be noted in Fig. 7 that the L-shaped closing mechanism 26 is pivoted at P24 to the intermediate section C and that the lower portion thereof floats on the inclined guide channel 31 at pivot 31B and on link 26A at the pivot 26C, the link 26A being pivoted at 268. This construction enables the spring 36 to keep the closing mechanism in a stable position except when it is going past dead center and this enables the bed frame to be narrower since the closing mechanism position shifts along the incline 31. In other words the position of the closing mechanism changes when the bed sections are changed from open to closed positions.

Attention is to be drawn to the fact that in Fig. 11 the pivots P5, P12, P14, and P15 hold the keeper actuating link 29 parallel to the body section C. However, movementof the pivot P12 from one end 27A of the slot 27 to the other end 275 (Figs. 5, 6, and 13) results in the actuating link 29 moving in substantially the same plane as the body section C. This sliding action of the pivot P12 in the slot 27 enables the body section C to be made shorter than would be the case if no substantial protrusion upwardly of the keeper book 24 occurs. If the keeper hook 24 should be maintained level with the top of a mattress then a person sleeping on the mattress might injure himself by bumping against the keeper hook.

Although my invention has been described in considerable detail, such description is intended as being illustrative rather than limiting, since the invention may be variously embodied, and the scope of the invention is to be determined as claimed.

I claim as my invention:

A foldable bed frame for a sofa bed comprising head, body, intermediate, and foot sections pivotally connected in end to end relationship and adapted to be forwardly unfolded to a bed position wherein the sections are arranged in substantial coplanar relationship with the head and foot sections at the ends of the bed, the body section adjacent the head and the intermediate section adjacent the foot section and being adapted to be rearwardly folded to a seat position wherein the foot section forms a seat cushion support and is parallel to and spaced above said body section with said head section extending upwardly and at right angles to said body section, a substantially L-shaped leg pivoted intermediate its ends to the free end of the foot section, said leg having a short arm which extends above and rearwardly along said frame in bed position, a laterally extending bolt fixed to said short arm, a first link having an end pivotally joined to said intermediate section and its other end pivotally joined to said leg above its pivot which is connected to the foot section when in bed position, a second link having one end pivoted to said intermediate section, a right angle keeper pivotally attached to the free end of said second link, a slot in said intermediate section, said free end of said second link being guided Within said slot, 21 think link having one end pivotally connected to said head section and the other end pivotally connected to said keeper whereby relative pivotal movement of said head and body sections Wiii rock said keeper, and said bolt being adapted to be hooked by said keeper when all of said sections are folded into sofa position in order to keep said foot section from accidentally moving upwardly when it forms the seat section of the sofa, and said bolt being adapted to rest directly upon said body section to serve as a brace in order to prevent said foot section from moving downwardly against said body section when the sofa is formed.

References Qited in the file of this patent UNITED STATES PATENTS Dyke Dec. 16, 1913 Holst Jan. 26, 1915 Holst et al Apr.11, 1916 Woller Apr. 29, 1952 Bank et a1 June 23, 1953 FOREIGN PATENTS Great Britain June 9, 1932 France Dec. 5, 1934

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