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Патент USA US2135586

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Nov. 8,v 1938.v
Filed April 20, 1936
Patented Nov. 8, 1938
Anton Lorenz and Andreas Gaal, Berlin, Germany
Application April 20, 1936, Serial No. 75,355
In Germany April 23, 1935
2 Claims.
This invention relates to furniture supports
which bear the seat and reclining parts of .a
chair on U-shaped cantilever arms.- As a rule,
these supports are made of iron or other metals,
5 whereas wooden supports lack the required elas
ticity and resiliency.
One object of the invention is theuconstruc
tion of wooden supports having the approximate
solidity and at the same time the elasticity of
10 steel supports. This is attained by dividing the
material of the supports into separate layers at
those places, which are to be resilient when the
support is bent under load. In this way the
layers can slide against each other to a degree
15 su?icient to avoid the danger of breaking, and
to allow an extensive elastic sagging. More,
over, according to the invention the material of
r the supports consists entirely of single layers,
which are, however, rigidly connected with each
20 other over the whole length of the support ex
cept at those places which are to be resilient
when being bent under load.
Another object of the invention is a protective
device to avoid the pinching of garment-parts.
25 Forthis purpose this device covers the divided
parts of the support but allows the pivots of the
seat to rest directly upon the resilient support
Further details of the invention are demon
30 strated in connection with the drawing, which
shows several examples of performing the in
vention in sitting-furniture. There is shown in
the drawing in:
Fig. 1 an arm chair in perspective represen
Fig. 2 the arm-chair of Fig. 1 in side-view
Fig. 3 a modi?ed shape of the support
Figs. 4 and 5 two side views of the divided part
on an enlarged scale
Fig.5 an arm-chair with a support composed
of several parts
Figs. '7 and 8 a protective cover of the divided
ends in side and back view.
The arm-chair according to Fig. 1 consists of
45 the supports I and 2 bent back in U-shaped
form, bearing the seat-part 3 by means of the
cross-bars 4 and.5. The supports can be man
ufactured e. g.‘ of repeatedly glued plywood
leaves or of synthetic-resin leaves. In the course
50 of manufacture the plates are ?rmly connected
with each other up to the points 8, ‘l. The
square, stoutly dimensioned beam is then bent
according to known bending methods. The ?rm
ly connected layers form a solid girder showing
only slight sagging capacity. As the single lay
(Cl. 155-50)
ers become, however, free from the point B, ‘l
onwards, they will give resiliently to a great ex
tent without exceeding the limit of elasticity, if
they are vertically loaded because they can slide
laterally against each other. The cross bar 5
transmits the load of the seat to the elastic ends
8 and 9, which, consequently, give in the man
ner shown, in exaggerated representation, in
Fig. 2, where it is drawn in broken lines.
Fig. 3 shows a modi?ed embodiment of a sup 10
port whose layers are connected with each other
in the lower parts 9 up to the point In, while
from Ha onward they are divided into loose
layers II which are slidingly movable against
each other. ‘This embodiment is suited for small 15
Fig. 4 shows a side view of a sheaf of layers.
Between the single loose layers there are placed
balls l3, which roll on the plates when the giv
ing or sagging motion sets in, thus reducing to
a minimum the friction of the plates among
themselves. In order to avoid the wide spaces
between the plates caused by the insertion of
the balls or rolls respectively, these can also be
held in corresponding roller~ or ball-bearing sur 25
faces, which can be worked or pressed step-like
into the plates; Convexities will thus occur
only on the uppermost or lowest plates, causing,
however, no disturbance of the bearing mem
bers. These roller- or ball-bearing surfaces are 30
not represented in the drawing.
Fig. 5 shows another exemplary embodiment
of the invention, seen from the side, where elas
tic plates 25 are inserted between the single lay
ers M, which are connected with the layers it 35
by cementing, glueing or even by lacing. These
elastic layers IE will deform when bent, with
out ‘causing friction.
In the embodiment of- Fig. 6 the support con
sists of a lower elastic part l6 with the piled 40
layers ll, of a vertical non-elastic stay l8 and
of an upper ‘elastic part l9 with the piled layers
20, upon which_rests the cross-bar 2i, bearing
the back of the seat 22, whose lower front part
rests on the cross-bar 23 in the stay Q8. The 45
lower elastic part l6, l‘! is placed upon the feet
24 and 25 in order to allow a sagging down to
wards the ?oor.
According to the arrangement of Figs. ‘7 and 8,
the upper part 20 of the elastic support l'b’is 59
covered on the outside by a protective casing
26, which allows the free bending of the layers
20 under'the influence of the load emanating
from the cross-bar 25.
The shown embodiments of the invention rep-.-. 55
resent examples which can be modi?ed in the
manner known in the furniture industry.
The frame shall consist preferably of wood;
the invention however, can equally be applied
in frames consisting of another material, as: for
' instance arti?cial substances or synthetic resin.
Having now particularly described and ascer
tained the nature of our said invention and in
what manner the same is to be performed we
10 declare that what we claim is:
1. A side support for a chair or the like, com
_ prising a U-shaped structure designed to rest on
one of its legs, in which said U-shaped structure
with the exception of ‘at least one of the free
ends of its legs is solid and said free end is di
vided into a plurality of leaves slidable on each
other, said leaves being integral with the solid
portion of said leg and forming a resilient end
portion, a part of the chair being supported on
the solid portion of the structure, and a part of
the chair being supported on the resilient end
of the structure.
2. A side support for a chair or the like, com
-prising a U-shaped structure designed to rest
on one of its legs, in which said U-shaped struc
ture. consists of a plurality of layers fastened
rigidly together throughout the length of the
U-shaped structure’with the exception of at
least one of the free ends of its length, the lay 10
ers being slidable on each other at said end, a
part of the chair being supported on the por
tion of the support having the layers fastened
rigidly‘together, and a. part of the chair being
supported on the end of the support having the
layers slidable on each other.
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