US 2847685 A
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A. L. FREEDLANDER 2,847,685
Aug. 19, 1958 MATTRESS SUPPORTING CONSTRUCTION Filed May 3, 1952 2 Sheets-Sheet l 3 1 4- V INVENTOR.
A. L. FREEDLANDER ATT'Y.
Aug. 19, 1958 Filed May 3, 1952 A. L- FREEDLANDER MATTRESS SUPPORTING CONSTRUCTION 2 Sheets-Sheet 2 INVENTOR.
A. L. FREEDLANIDER United States Patent Office 2,847,685 Patented Aug. 19, 1958 MATTRESS SUPPORTING CONSTRUCTION Abraham Lincoln Freedlander, Dayton, Ohio, assignor to The Dayton Rubber Company, a corporation of Ohio Application May 3, 1952, Serial No. 285,901
1 Claim. (Cl. -354) The present invention relates to an improved type of mattress supporting construction, and more particularly to a novel type of bed-board structure for use in supporting a mattress either with or without a bed spring. It is common practice to utilize bed boards made of wood or compressed fiber between a mattress and spring in order to modify softness in the mattress-spring assembly since it is recognized that excessive softness in a mattress structure is undesirable from the standpoint of proper bodilysupport during rest or sleep. Bed boards of this type have the disadvantage of being relatively rigid and inflexible thus, in effect, preventing any cooperative action between the spring and mattress and causing loss of any of the advantages to be obtained by a mattress construction having supporting or controlled yieldability. This is particularly true in the case of foam rubber mattresses which are now coming into extensive use.
In accordance with the present invention, applicant has provided a novel type of bed-board construction which will provide a firm support for the mattress and will be of controlled yieldability in order to give the desired degree of firmness for supporting a reclining body. Furthermore, such a board of controlled yieldability will permit use with or without the additional support of a spring construction, and is especially adaptable to be used in combination with a foam rubber mattress. In addition, the flexible and yieldable bed boards of the present invention permit use without excessive transmission of movement from one portion of the bed tothe other which would be particularly noticeable in the case of double beds, and furthermore, proves itself readily adaptable to supporting loads of different weights on difierent sides of the mattress.
The above-mentioned objectives and advantages may be readily apparent to those skilled in the art from an examination of the specification and drawings referred to herein.
Certain preferred forms of the present invention are illustrated in the accompanying drawings in which:
Figure 1 represents a view partly in elevation and partly in cross section of a bed assembly incorporating a bed board of the present invention.
Figure 2 illustrates a view in elevation of the bedboard construction referred to herein.
Figure 3 describes a view in transverse cross section taken along lines 3-3 of Figure 2.
Figure 4 illustrates a transverse cross-sectional view of a modified form of a bed-board construction taken along the same plane as Figure 3.
Figure 5 illustrates a view in elevation of another modified form of bed-board construction.
Figure 6 illustrates a view in elevation of still a further modification of the novel bed-board construction of this invention.
Figure 7 describes a vertical cross section taken through a portion of the construction of Figure 6 along line 7--7.
Figure 1 illustrates a bed construction of the Holly wood type in which a box spring 11 is supported upon frame 10 said frame having legs, and a mattress 12 is supported upon a bed-board of the present invention positioned between the box spring and the mattress. Instead of a box spring, 11 may also represent a mattress supporting platform of any desired type. The mattress illustrated is of a foam rubber construction, but conventional cotton or spring-filled mattresses may also be used.
Figure 3 illustrates a cross-sectional view describing one form of construction of the bed board 13 which is illustrated in Figure 2. This modification is constructed of a rubber composition 14 having incorporated there with fibers 15. These fibers preferably extend transversely of the longitudinal axis of the board. The fibers are incorporated into the rubber compound by milling or otherwise and are intimately dispersed therein. When the milled compound is calendered or otherwise formed into sheets, the fibers are aligned in substantially the direction of forming of the sheet. The sheets may then be cut into the desired size and shape with the fibers running in the desired direction with respect to the longitudinal axis of the bed. The rubber base compound of which the foam is formed is a fairly hard yet flexible compound which may be composed of either natural or synthetic rubber, or a blend thereof. The amount of y-ieldability of the board may be controlled within the desired limits by regulating either the extent of cure of the rubber compound or the proportion of fibers incorporated therein, .or both. Preferably, the fibers utilized may range in length from /8 in. to /2 in. Ordinarily, the fibers are obtained by grinding or chopping of longer fibers and the resultant product is usually a mixture of fibers of varying lengths. In order to obtain an intimate dispersion of the fibers and proper alignment, it is desirable to avoid having too high a proportion of fibers of /2 in. in length. On the other hand, in order to obtain a suitable degree of directional reinforcement, it is desirable that the fibers not be too finely divided, and the inclusion of excessive proportions of fibers of less than A; in. in length should be avoided. For ordinary purposes the incorporation of from 10 to 50 percent of fiber based on the rubber in the compound by weight, is preferred.
A typical compound for fabrication of the bed board of this invention may be formulated as follows:
Parts by Weight The various compounds are milled together and then calendered into a sheet which is vulcanized either in a press or in open steam between plates under some pressure. The rubber may be natural rubber or one of the synthetic rubbers, such as the butadiene-styrene copolymer or the butadiene-acrylonitrile copolymer, or the like. The fiber may be in any desired proportion, preferably ranging from 10 to 50 parts per parts of rubber,
and may be either cotton, rayon, nylon, or other natural or synthetic textile fibers. Glass fibers may also be used. The compound is prepared to give a final hardness sufficiently resilient to give the desired support to the mattress. A Shore A Durometer hardness of from about -.1position'similarrto thatdescribed in Figure 3 with the fibers 'inuone layer running at anan'gleto'thefibers in'the adjacent layer. .For :example, fibers 17 incorporated in thecompound-of toplayer 16 mayrun transversely to the longitudinal axis of the board, while fibers 19 incorporated in'rcompound '18 of the adjacent layer may run in -a direction atright angles to the direction of the fibers in layer 16. This will provide additional control of the yieldability inmore than one direction. Obviously, if
desired, the fibers in successive layers may extend at acute angles to one another rather than at right angles.
Figure 5 illustrates :a sectional .bed board 13b which is formed in three sections 20,21, and 22, each section exttendingtransversely of the bedand hinged at the joints by hinge means 23 and 2.4.
Figure 6 illustrates a modified'type of sectional bed board which is divided into both longitudinal and transverse-sections 25, 26, 27, 28, 29, and 30, and hinged in both directions by means of hingemeans 31, 32, and 33. As :shown in Figure 7, these hinge means may preferably be in the form of a flexible rubber strip 31 ccmented at the juncture of adjacent sections, which, for example, may be sections 25 and 27. A flexible hinge of this type not only permits flexing at the joints under load, but also permits one section to be depressed ver- .tically with respect .to another should the nature of the load require this. This vertical depression or displacement of the individual sections is to be distinguished from the pivoting at the joints between such sections as in the case of conventionally employed 'hinge connections. While the sections according to the present invention are joined so that under certain load conditions there will be a pivotal or hinge action between the sections, this invention involves the further novel feature of an actual vertical displacement of one section relative to the common plane of the remaining sections so that even the marginal portions of the displaced section are themselves 4 removed from the common plane of the remainder of the sections.
Sectional boards of the type set forth in Figures 5 to 7, inclusive, have the advantage that they permit better distribution of the body weight and thus provide more uniform support. It is recognized that most of the weight of the human body is distributed in the region between the neck and the knees and the central section of the board may be designed to have such dimensions as to distribute this portion of the'body weight over the surface thereof.
The above-described modifications represent certain preferred forms of the invention, but it is obvious that many modifications and variations thereof may be made without departing from thespirit and .scope thereof; therefore, only such limitations should be imposed as are indicated in the appended claim.
A bedboard construction for positioning between a mattress and a bed foundation member designed to accommodate the weight of the body of aperson reclining onsaid mattress, comprising a sectioned sheet of vulcanized rubber-like material having a plurality of discrete, parallel fibers of relatively short length arranged therein, wherein the individual sections of said sheet lie transversely of the body of a person reclining in normal posi- .tion upon said mattress, are joined by elastic strips adhered to the marginal .portion of their broadside surfaces and are vertically displaceable from their common plane of repose and wherein saidfibers extend longitudinally of saidsections.
References Citedin'thefile of this patent UNITED STATES PATENTS 920,256 Broadhurst-et al. May 4, 1909 1,000,781 Collier Aug. 15,1911 2,135,057 Slayter etial Nov. 1, 1938 2,490,867 Greenhill Dec. 13, 1949 2,551,976 Smith May 8, 1951 2,616,100 Weiner Nov. 4, 1952 FOREIGN PATENTS 507,215 Great Britain June 9, 1939