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Патент USA US2118297

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Patented May 24, 1938
John A. Douglas, Trenton, N. J., assignor to
Trenton Spring Products Company, Trenton,
N. 1., a corporation
Application July 11, 1936, Serial No. 90,111
2 Claims.
This invention relates to a mattress structure
and more especially the inner spring portion
The chief object of the invention is to provide
5 in a mattress a spring structure which will hold
the sides of the mattress straight and which will
be relatively ?exible and yet include therein a
considerable degree of rigidity, it being recog
nized that normally these two features are op~
posed to each other.
The chief feature of the invention consists
in forming the spring structure, for inclusion in
a mattress, of a plurality of springs of the tied
or untied type and associating therewith border
15 Wire means whereby the sides of the mattress
therebetween is a side border wire member also
of U-shaped form for the purpose hereinafter
set forth, and including the side border portion
23 and the two ends 24. The portions 2! of each
unit preferably are of equal length and the two 5
extensions 2d- of the U-shaped members 23-24
extend towards each other in alignment and ter
minate short of meeting engagement.
The springs are arranged in longitudinal and
transverse rows. Encircling the entire border 10
wire portions 2!], “22, 2! and 23 is a helical struc
ture 30 and the same also encircles the end turn
of the marginal coils in the two longitudinal out
side rows as at 3! and encircles the end turns
of each of the coils of the two transverse end
are held straight, the border Wire means being
rows of coils as at E2 and the corner coil com
articulated thereby providing for ?exibility in
the mattress structure, the rigidity of the spring
mon to the marginal transverse and longitudinal
structure being obtained by reason of the bor
20 der wire arrangement.
The full nature of the invention will be under
stood from the accompanying drawings and the
following description and claims:
In the drawings, Fig. l is a top plan view of
25 one embodiment of the invention.
Fig. 2 is a side view thereof, the dotted lines
therein indicating a ?exed portion of the struc
(Cl. 5—249)
Fig. 3 is a view similar to Fig. l. and of a
more complicated form of the invention.
Fig. 4 is a view similar to Fig. 2 and of the
form of the invention shown in Fig. 3.
Fig. 5 is an enlarged plan view of a connec
tic-n between adjacent coils and an extension
35 of the border wire.
Fig. 6 is a view similar to Fig. 5 and of a still
further modi?ed form of the invention.
In the drawings it! indicates a plurality of
double cone, coil springs which have their oppo
pO site ends‘ ll tied or knotted as at I2 to an ad
jacent turn i3. In knotting these ends, the im
mediate end I4 is turned down toward the in
terior of the spring structure so that the barbed
or sharp end of the spring wire would not ex
45 tend into the covering and other material that
surrounds the spring structure included within
the mattress.
Herein the border wire arrangement includes
an end portion 20 having two side extensions 2i
connected by a radius portion 22. Each side of
the mattress is similarly provided and each end
of the mattress is similarly provided with the re
sulting U-shaped border wire member 20, 2| , 22.
The two aligned end portions 2| terminate
55 short of meeting engagement and interposed
rows as at 33.
The number of encircling en
gagements between the helix 3t and the adja
cent turn of the coils is determinable to a large 20
extent by the diameter of the coil. As a general
rule two to four engagements are provided. By
this arrangement, all of the marginal coils are
tied to the marginal border wire arrangements.
In view of the fact that the extensions 26 are 25
longitudinally positioned with reference to the
transverse rows of coils, the adjacent coils in
transverse rows have their upper turns connected
together by the helices it which terminate short
of the border wire or helix 3?] connection. These 30
connections are indicated by the numerals It!
and the ends 42 in the present instance are not
connected to the border wire or border wire en
circling helix.
The extensions 24 terminate as at 25 and these 35
are spaced apart, the center to center spacing,
approximately between adjacent coils in a trans
verse row in the present instance. The helix 45
terminates short of border wire or border wire
helix engagement as at 46 and simultaneously 40
encircles as at d? by a plurality ‘of turns two ad
jacent coils it and the extension 26.
Each end 59 of border wire side portion 2!
encircles the connection between extension 24 and
border wire 23 and herein the same is illustrated 45
as of elongated character. The loop 59 thus
formed is tied as at 5! to the main portion 2|
of the border wire. An eye portion may be em
ployed in place of the loop. However, an eye
portion does not provide the accommodation in- 50
dicated by the dotted lines in Fig. 2 but necessi
tates the inward bending of the frame and
springs when one of the end sections is bent out
of the plane of the middle section.
It will be apparent from an inspection of Figs. 55
encircles the adjacent sinuous portions of the
1 and 2 that the border wires 2 will bend slightly
same coil.
at their midportions so that the mattress may
be partly folded so the housewife can readily
handle the same. Also, the mattress may be
folded in a transverse direction and to a greater
extent than in the longitudinal direction by rea
son of the jointed. connections of the end sec
tions to the mid-section. The sectionalized bor
and when the extension 2213 is associated there
with, this also is provided with a sinuous portion
making four or ?ve inter?tting sinuous portions
encircled by the helix. In this form of the in
vention, similar numerals of the two hundred
series indicate similar or like parts, the addi
tional sinuous portion in the second turn being
indicated by numeral 269 and registering with
der wire arrangement permits of this articula
tion and also insures that the sides of the mat
tress are held straight and the edges are rela
tively rigid, yet by reason of the construction
employed, there is not only provided ?exibility
generally regarding various portions of the mat
the serpentine end.
mattress will accommodate itself to the person’s
body thereon.
In Figs. 3, ‘i and 5 is illustrated a modi?ed
form of the invention, wherein certain adjacent
said is to be considered as illustrative and not
restrictive in character.
a better interlocking arrangement without de
set out as follows:
In this form of the invention, the coils H
are of untied character and the ends i M. are pro;
vided with a sinuous arrangement H2. The ad~
39 jacent coil approximately diametrically opposite
its end 9M, is provided with a similar serpen
tine type portion i 52a and the two portions inter
t and are encircled by the helix Hill as at Ml
and by a plurality of turns of said helix. In this
form of the invention also-see Fig. 5-—the ex
tension !‘24 of the U-shaped border wire H3 is
provided with a sinuous portion l2lia and this
is included between the two sinuous portions I I2
and 5 Hat and the helix encircles the three inter
4.0 ?tting
The longitudinal
marginal coils MD are pro
vided with a third and intermediate sinuous por
tion H21) and the border wire portions l2! and
:23 at Nita and 523a, respectively, are provided
with these sinuous portions that inter?t with
the adjacent sinuous or serpentine portion of
the adjacent coil and the helix i3! encircles
the same. Similarly, the border wire portion 52!]
includes the sinuous portions lZiia. and the coils
adjacent thereto are provided with the sinu
ous portions Ha and the helix E32 encircles
same when inter?ttingly associated together. It
will be apparent in this form of the invention,
the coils are of untied character.
In Fig. 6 there is illustrated a further and
more complicated form of the invention wherein
each coil Eli.‘- has a sinuous or serpentine portion
in the turn immediately adjacent the end turn
and end of the coil and the helix simultaneously
Various modi?cations
have been thus disclosed as well as suggested
20 portions are arranged in a sinuous manner for
While the invention has been described in
great detail in the foregoing speci?cation, and 15
similarly illustrated in the drawings, the afore
15 tress but localized flexibility as Well so that the
struction or reduction of the hinging character
embodied in that type of connection. Similar
numerals of the one hundred series indicate like
or similar parts. The differences will be brie?y
In this form of the invention, there
are two adjacent serpentine portions per coil,
making three, or four to the two adjacent coils
hereinbefore and these, together with others 20
which will readily suggest themselves to persons
skilled in this art, are all considered to be with
in the scope of this invention, reference being
had to the appended'claims.
The invention claimed is:-—
1. A unitary articulated spring structure for
incorporation in a mattress, having substantially
semi-rigid parallel top and bottom frames and
a plurality of parallel coil springs constituting
the sole spacing means therebetween, the coils 30
being arranged in rows, each frame being iden- '
tical to and in substantial registration with the
other, each frame including two U-shaped semi
rigid border wire members forming end borders
and the arm portions thereof forming side border
portions, the arms of each end member being
directed toward the arms of the other member,
and two intermediate U-shaped semi-rigid border
wire members having similar relationship there
between and with the midportions completing 40
the frame sides and in alignment with the aligned ' "
arm portions of the end members, a loose hinge
type connection between the ends of the aligned
arm portions of the end members and the inter
mediate member substantially at the ends of the .45
midportion thereof, the arms of said intermediate
members being directed towards each other and
aligned and terminating adjacent each other and
remote from the midportions of said intermediate
members, flexible helix means connecting all mar 50
ginal coils to the immediate adjacent border
forming portions of the wire frames, and flexible
helix means connecting the end turns of adja
cent coils in adjacent rows.
2. A device as de?ned by claim 1, character 55
ized by the loose pivotal connections each being
of elongated loop character.
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