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Publication numberUS2985895 A
Publication typeGrant
Publication dateMay 30, 1961
Filing dateApr 24, 1958
Priority dateApr 24, 1958
Publication numberUS 2985895 A, US 2985895A, US-A-2985895, US2985895 A, US2985895A
InventorsBloom Abraham
Original AssigneeBloom Abraham
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Adjustable box springs
US 2985895 A
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Description  (OCR text may contain errors)

y 1961 A. BLOOM ADJUSTABLE BOX SPRINGS Filed April 24, 1958 INVENTOR. ABRAHAM BLOOM group Unite States Patent ADJUSTABLE BOX SPRINGS Abraham Bloom, 721 Arlington Ave., Plalnfield, NJ.

Filed Apr. 24, 1958, Ser. No. 730,614

1 Claim. (CI. 54423 This invention relates to box springs for beds comprising an enclosed spring unit assembly. The purpose of this invention is to provide means for adjusting the firmness of box springs to suit the preference of the user or users. The object of this invention is to provide as simple, inexpensive and yet practicable means to achieve above mentioned purpose as possible.

In the accompanying drawings Fig. 1 is a bottom plan View of a box spring with parts being broken away,

Fig. 2 is a cross section along line 24-2 in Fig. 1,

Fig. 3 is a cross section along line 3-6 in Fig. 1,

Fig. 4 is an enlarged detail of the combination of mem bers used to adjust the firmness of the box spring.

In these figures the box spring 1 is shown to consist of a frame 22 on which sets a coil spring unit 23 which consists of a plurality of coil springs 4 generally helical in form said coil springs being formed into a unit by tie wires on top 5 and on bottom 6. The coil spring unit 23 is covered by padding 7 and a fabric 18 called the ticking covers the exterior.

Externally threaded posts 8 with the welded on or soldered nuts 24 when rotated in internally threaded members 9 which are supported by slats 10 serves to raise or lower longitudinal bar members 11 and 12 which are bolted to and kept in line by center bar members 13, the bolt holes in 11 and 12 where these members bolt to member 13 being of elongated shape. Fastened to bottom of post 8' is knob 14 which has a set screw that engages on flat spot on post 8.

A plurality of tie cords 15 tie the top wires 5 to cross slats 10 which form part of frame 22 the purpose of these cords being to prevent distortion of the top surface of the box spring.

The action of aboved described combination is as follows. When knobs 14 are rotated, posts 8 will raise or lower longitudinal bars 11, 12 and 13 so that the tension in coil springs 4 and coil spring unit 23 increases or decreases thus the firmness of the box spring 1 may be varied as desired.

The drawings and above description refer to a double size box spring with each side adjustable. It may be in some cases preferred to have only one side adjustable, or in the case of a single size or twin size box spring, the adjusting mechanism consisting of posts 8, members 9 and 10, longitudinal bars 11, 12 and 13' and other associated parts would be located at the center and parallel to the sides of the box spring. Also whereas the drawings indicate that bars 11, 12 and 15 are of wood, it is obvious that these members may also be made of metal. The invention is subject to modifications coming within the scope of the claim.

I claim:

In a box-spring structure for beds and the like, the combination comprising a normally stationary and rigid underframe structure adapted to support a flexible bed spring-unit, said spring-unit consisting ofa flexible upper grid section defining the upper plane and surface area of the spring-unit and a flexible under grid section of substantially equal area and a plurality of coiled spring elements arranged on vertical axes between said flexible upper and under grid sections, means for securing said spring-unit to said rigid underframe including a plurality of tie cords connected at their upper ends to the said flexible upper grid section of the spring-unit and at their lower ends to said rigid underframe structure, and a plurality of independently operable screw means threadably engaged with said rigid underfranie Structure and operative against the under surface of the flexible under grid section of the spring unit adapted when selectively actuated to flex the said under grid section at localized areas whereby to vary the firmness of the spring unit at localized zones, said tie-cords connecting the upper flexible grid section of the spring unit to the rigid underframe structure functioning to restrain the upper grid section from bulging when said screw means are actuated to flex the said flexible under grid section of the spring unit.

References Cited in the file of this patent UNITED STATES PATENTS 632,520 Fixen Sept. 5, 1899 2,049,550 Van Dresser Aug. 4, 1936 2,302,514 Atkinson Nov. 17, 1942 2,558,288 Backus June 26, 1951 2,595,072 Gottschalk Apr. 29, 1952 2,630,585 Reese Mar. 10, 1953 2,675,566 Lieberman Apr. 20, 1954 2,842,784 Grund July 15, 1958

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US632520 *Aug 3, 1898Sep 5, 1899Brigt B FixenSpring-bottom for beds, sofas, or the like.
US2049550 *Feb 10, 1932Aug 4, 1936Van Dresser Specialty CorpCushion construction
US2302514 *Oct 11, 1938Nov 17, 1942Jerome T AtkinsonBedspring and the like
US2558288 *Mar 6, 1947Jun 26, 1951Backus CarlAdjustable spring tensioning of bed springs
US2595072 *Mar 22, 1948Apr 29, 1952Victor H GottschalkAdjustable resiliency bedspring
US2630585 *Jul 3, 1950Mar 10, 1953Clyde B ReeseAdjustable bedspring
US2675566 *Mar 3, 1950Apr 20, 1954Leonard Chicago CorpBedspring construction
US2842784 *Dec 13, 1955Jul 15, 1958Grund JohnAdjustable mattress springs
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3059249 *Apr 23, 1959Oct 23, 1962Englander Co IncAdjustable box spring
US3083380 *Dec 26, 1961Apr 2, 1963Adler Harry MMattresses
US3126554 *Oct 27, 1961Mar 31, 1964 Prescription bedding having individually adjustable spring units
US3252170 *Aug 8, 1963May 24, 1966James R FryeVariable firmness mattress
US3339214 *Apr 28, 1966Sep 5, 1967Wortso CorpIndividually adjustable sleeping equipment
US4112528 *Apr 4, 1977Sep 12, 1978Leggett & Platt, IncorporatedBox spring assembly and small diameter single cone coil spring for use in that assembly
US4190914 *Mar 29, 1978Mar 4, 1980Souleymane DialloSleep unit
US4667357 *Oct 8, 1986May 26, 1987Fortune Richard LSleep unit having adjustable firmness
US4886250 *Aug 7, 1987Dec 12, 1989Schweiger Industries, Inc.Spring structure for cushion seating
US7296310Aug 22, 2005Nov 20, 2007Milliken & CompanyAdjustable mattress foundation
EP2474251A1 *Jan 7, 2011Jul 11, 2012Han-Chung HsuMattress structure
WO2005020760A1 *Aug 24, 2004Mar 10, 2005David ClareBeds and mattresses
U.S. Classification5/248, 5/697
International ClassificationA47C31/12, A47C27/06
Cooperative ClassificationA47C27/061
European ClassificationA47C27/06A