US357224A - Spring bed-bottom - Google Patents

Description

(No` Model.)

STRING ABBD- BOTTOM. .No. 357,224,

PaenteaTeb. a, 1887.

N" UNITED @STATES PATENT OFFICE,

THOMAS E. OBRIEN, CHICAGQYILLINOIS.

SPRING BED-BOTTOM.

SPECEFICA'ILION forming part of Letters Patent No. 357,224, dated February 8. 1887.

Application filed September-7, 1886. serial No. 912,904. (No model.)

To @ZZ whom it may concern: l

Be it known that I, THoMAs E. OBnlnN, a citizen of the United States, residing at Chicago, in the county of Cook and State yof Illinois, have invented a certain new and useful l Improvement in Spring Bed-Bottoms; and I, hereby declare the following to be a full, clear, and exact description of the same.

My improvement relates to the class of bedbot-torns, or spring beds or mattresses,77 as they are also called, in which a frame, usually extensible at its ends, or only at one end, has stretched over it a sheet of, woven wire or other elastic or yielding material, supported underneath, and at the same time having its springy quality increased by spiral springs, i'nterlocked by 'means of suitably-arranged links, and held apart and sustained in position by additional links or wire rods connecting the outer lateral rows to the side rails of the frame and the end rows to the end rails of the same. In bed-bottoms of the general construction thus set forth a brace is provided to extend transversely and centrally across the` frame, to prevent inward bending or warping of the side rails, which would otherwise necessarily ensue as a consequence of the strain'exerted by the use ofthe device through the connection of the lsprings with the side rails.

It is rny object to provide a construction of spring bed-bottom whereby the central brace referred to may be dispensed with without producing warping ofthe side rails and to the advantage of the bed-bottom, inasmuch as it augmente its springy quality and, when the device is adjustable in the manner stated, pro! duces greater and more even tension of the springs vin resetting them by extending the frame when the bed is rendered sagging with use.

My invention con *,'sts in the construction hereinafter set forth and claimed.

In the drawings, Figure l is a perspective View of the under side of an adjustable spring bed-bottom provided with my improvement, and Fig. 2 a longitudinal sectional view of the same.

A is the frame, comprising the side rails, r,

and the usual end-rail devices, q, or end connections, for holding the stretched woven-wire sheet B at oppositeven'ds, the usual adjusting means, in the form of set-screws turned by a v wrench applied to their heads, being provided at opposite ends of either or both end rails, to permit their adjustment toward or from each other in relaxing or stretching the wire sheet B.

The adjusting means referred to are not shown in detail in `the drawings, nor accurately herein described, for the reason that they are too common in connections'like the present to require specific illustration and description.

C C are the springs, spiral in form, and preferabl y conical, as shown, held with their flaring ends against and stayed by the under snrfaee of the woven-wire sheet B and apart by wire rods p, fastened at their extremities into the end rails, and extending thence toward the adjacent transverse rows of springs C, where they'are provided with bifurcated links 0j which hook each into two springs at their lower tapered ends, the springs between the extreme transverse rows bern g connected cross- '.Wise at their lower tapered ends by links or hooks n.

`Instead vof connecting the lateral rows of springs C to the side rails, r, directly -by links or hooks fastened to the rails, like the rods p to the end rails, q, or end connections, and hooked into the tapered ends of the springs, as hitherto practiced, thereby rendering a central transverse brace necessary to prevent warping of the side rails, I connect theselateral springs attheir tapered ends loosely to a rod or strip, D, at opposite sides of the frame, preferably by passing the rod or strip th rough the annular extremities of the springs; or, in other words, Stringing the annular extremities of the springs upon it, though they may be otherwise connected therewith, and secure the rods or strips at their extremities on kopposite sides of the frame to the inner sides of the side rails toward their opposite ends. By this conf. struction the strain upon the bed by its'use is not exerted at and about the centers of the side rails, but through-the rods or strips D, owing to their connection to the side rails near the extremities of the latter, which arrange` ment avoids warping of the side rails without requiring a transverse brace for the purpose, and obviously augments the spring quality of the bed-bottom.

If the rods or strips D are fastened to th side rails in the manner described, or to the IOO under sides of the latter, if preferred, which amounts to the same thing, extension of the frame'in the common manner does not distort the springs connected to the rods or strips, as would be the tendency if the springs were fastened, as hitherto, by hooks or links directly to the side rails, but being strung 7 upon the rod or strip, or fastened thereto by a suitable loop 0r hook connection, they have sufficient sliding motion or play to adjust themselves with the stretching of the frame and sheet B without distortion.

I am aware that it is not new to provide a frame having side rails and adjustable end rails and a central cross-bar supporting the coiled springs over which is stretched woven fabric, the opposite ends of which, as also of longitudinal springs supporting the central cross-bar, are fastened between the two pieces of the respective end rails, whereby the tension of the fabric and longitudinal springs can be increased or decreased at will; and also that a bedbottonl is not new having a main frame provided with metal straps rigidly connected with the under side of the same to support a secondary frame sustaining the springs, over which the woven fabric is stretched by having its ends connected with brackets pivoted to the end sides of the main frame, the connee tion of the fabric and brackets being effected through t-he medium of transverse adjustable bars and adjacent strips, between which and the said bars the ends of the fabric are fitted and clamped. Both ofthe foregoing construe tions are shown and described in patents already granted.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a spring bed-bottom, the combination of the frame A, comprising side rails, r, and end connections,g, adjustable toward and from each other, springs C, connected at their lower tapered ends by links n and suspended at the transverse end rows from the adjacent end connections of the frame and stayed at their upper ends, and rods D,secured at their opposite eX- tremities near the ends of the side rails and extending lengthwise of the same, and having connected with them the adjacent side rows of springs C at the lower ends of the same, sub stantially as and for the purpose set forth.

2. In a spring bed-bottom, the combination of the frame A, comprising side rails, r, and end rails, q, adjustable toward and from each other, woven fabric B,secured at opposite extremities to the end rails, springs C below the fabric B, connected at their lower tapered ends by links n and suspended at the transverse end rows from the adjacent end rails of the frame, with their flaring ends against the uuder surface ofthe fabric B, and rods D,secured at their opposite extremities near the ends of the side rails to extend lengthwise of the same and having loosely connected with them the adjacent side rows of springs C at the tapered ends of the same, substantially as and for the purpose set forth.

THOMAS E. GBRIEN.

In presence of- J. NV. DYRENFORTH,

HUDSON.

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