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Патент USA US2063780

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Dec. 8, 1936.
Original Filed June 1, 1931
2 Sheets-Sheet l
I "Dec; 8; 1936.
2,063,780 ‘
A. P. BALL ’
Original Filed June 1, 1931
2 Sheets-Sheét 2
Patented Dec. 8, 1936
Albert P. Ball, Detroit, Mich., assignor to Briggs
Manufacturing Company, Detroit, Mich., a
corporation of Michigan
Application June 1, 1931, Serial No. 541,486
Renewed May 29, 1936
3 Claims. (Cl. 155-50)
This invention relates to chairs and the like
and more particularly to improvements in the
construction of chair frames.
One of the objects of this invention is to pro
vide a chair having a frame formed of bar, rod
or tubular metal stock bent to form a floor en
l5 which together constitute the back of the
chair frame.
Each vertical leg portion l2 and horizontal
seat supporting portion iii are formed at their
juncture with a coil It as clearly illustrated, 5
these coils permitting vertical angular movement
gaging portion, a vertically spaced seat support
of the seat supporting portion l3 due to the resil
ing portion and a back portion, together with
coil portions between the seat and floor portions iency of the metal stock from which the coils
are made. In other words the seat supporting
permitting vertical angular movement of the portion
ill of the frame may rock downwardly 10
seat supporting portion due to the resiliency af
toward the floor engaging portion A from the
forded by the coils.
position of rest illustrated in Figures 1 to 4, when
Other objects, advantages and novel details of the seat is occupied.
construction of this invention will become more
The relative vertical angular movement in an
15 apparent as this description proceeds, especially‘ upward
direction of the seat supporting portion 15
when considered in connection with the accom
is resisted by check straps II or the like, arranged
panying drawings, wherein
between the spaced parallel horizontal portions
Figure 1 is a perspective view of a chair con
I0 and seat supporting portions I 3 of the frame,
structed in accordance with my invention, the these check straps being connected respectively
same being shown trimmed;
Figure 2 is a perspective view of the frame to these portions. Obviously, these check straps 20
permit downward swinging movement of the seat
of the chair with the trimming material omitted; portion, the check straps being ?exible but limit
Figure 3 is a side elevation of the structure upward movement of the seat portion to. a posi
illustrated in Figure 2; and
tion substantially parallel with the ?oor sup
Figure 4 is a fragmentary sectional perspective porting portion.
25 view showing the chair frame with some of the
trimming material attached.
Referring now more especially to Figures 1 side of the chair frame the spaced horizontal
portions I I) and I3 are connected at their for
to 4 .inclusive of the drawings, it will be noted ward ends by the vertical leg portions ll-l2,
that the stock from which the frame of the chair these parts forming substantial U-shaped por
is constructed is shaped to form a ?oor or ground tions at each side of the chair frame.
engaging portion A, uprights or vertically ex
tending leg portions B, horizontally extending tions formed also preferably of spring steel rod
seat portions or seat supporting portions C, and stock, the rear ends of these arm portions I 8 being
an upright back portion D.
attached, for instance, by means of sleeves l9 to 35
The ?oor engaging portion A is preferably, al
the upright back portions ll, the forward ends
though not necessarily, substantially'U-shaped of these arm portions being bent to provide ver
in plan view and comprises a pair of spaced paral
tical portions 20 shaped to form 'coils 2| com
lel side portions l0 extending from the front to panion to the coils I6 previously referred to, the
the rear of the chair structure, these side por
free ends 22 of the arm portions being received 40
tions It being bent upwardly to provide upright within the open upper ends of the upright por~
portions ll constituting a portion of the leg por
tions ll of the floor engaging members.
tions B.
These arm portions l8 provide angular braces
In the form of the invention illustrated in Fig
which assist in strengthening the seat portion.
45 ures 1 to 4 inclusive, the ?oor engaging portion the coils 2| thereof functioning during the rock- 45
A is in the form of a hollow tubular member and ing movement of the seat to resiliently permit this
rocking movement and at the same time resisting
the upright ends ll thereof are ?attened to re
ceive therein the vertically extending ends l2 of undue movement thereof and returning the seat
to its normal position of rest.
the horizontally extending seat supporting por
It will be understood that the seat portions I 3, 50
50 tions l3. The seat supporting portions l3 are
formed preferably from a single length of spring the arm portions l8, and the back oscillate or
steel rod stock or the like, which is bent to form a swing about a center comprising the coils l6-2i.
While obviously a chair frame constructed as
vertically extending U-shaped portion compris
ing upright portions I4 and a transverse portion heretofore described my be trimmed and ?nished
in any desired or preferred manner, I have herein 55
illustrated one way in which the frame may be
trimmed to provide a comfortable seat as well as
an attractive one.
The reference character 23 indicates a trans
verse frame member extending between the up
right leg portions substantially at the juncture of
the upright leg portions and the seat portion, thus
providing a substantially rigid transverse frame
member to prevent sagging of the seat proper
10 when occupied. This transverse frame member
may be of wood or any other suitable material
and arranged adjacent thereto I preferably pro
vide a sheet metal member which embraces the
wood member 23 as illustrated most clearly in
15 Figure 4.
The seat proper may be formed by wrapping a
fabric strip 25 around the seat supporting mem
ber l3 as also most clearly illustrated in Figure
4. A spacer bracing member 26 is preferably pro
vided between the upright portions IQ of the back,
this transverse brace member resisting any tend
ency of the frame to collapse inwardly when the
seat portion 25 is occupied.
The arm portions l8 may be provided with arm
25 rests 21 formed of wood or any other suitable ma
terial, these arm rests being provided with rela
tively wide ?at upper surfaces upon which the
arms of the occupant of the chair may comfort
ably rest. The under side of these arm rest por
30 tions 21 are formed with rabbets 28 to receive the
portions l8 and 20, the arm rests being secured
thereto as, for instance, by means of clips, staples
or the like, not shown.
In Figure 1 the entire structure is shown as
35 trimmed by being encased in a cloth or fabric
covering which substantially encloses the back,
arms, seat and leg portions. To those skilled in
this art it will be apparent that the trimming is
principally a matter of taste and design and
40 forms no essential part of this invention.
In the former construction hereinbefore de
scribed the ?oor engaging member is illustrated
as formed of a tubular pipe-like member. One
advantage of the tubular ?oor engaging portion
terminating in the upright leg portion l I, is that
this structure is more rigid.
Obvious modi?cations will suggest themselves
to those skilled in this art and to this end reser
vation is made to make such changes as may come
within the purview of the accompanying claims.
What I claim as my invention is:
l. A chair frame including, a substantially U
shaped floor engaging member formed of tubu
lar stock with the ends of said u-shaped mem
ber extending vertically to form upright leg por
tions, substantially horizontal seat supporting
portions terminating in coils at one vend thereof
with the free ends of said coils extending verti
cally downwardly, arm rest members, the said free 15
ends of said coils and the ends of said arm rest
members being secured in the open ends of the
upright leg portions of said tubular floor engaging
member to connect said seat supporting portions
2. A chair frame including, a floor engaging
portion having upright leg portions, seat support
ing portions terminating in coils at one end there
of, arm members connected to said seat support
ing portions and terminating in coils arranged in 25
juxtaposition to said ?rst coils, and means for
securing the free ends of said ?rst and second
mentioned coils to said upright leg portions.
3. A chair frame including, a ?oor engaging
portion having upright leg portions, seat support
ing portions terminating in coils at one end there
of, upright back portions connected to said seat
supporting portions, arm members each compris
ing a substantially horizontal part connected to
said upright back portion and a substantially 35
right angularly extending part terminating in a
coil, the coils of the arm members and of said
seat supporting portions being arranged in pairs
with the free ends of said pairs of coils secured
respectively to said upright leg portions to con 40
nect said seat portions to said leg portions, said
angular arm members acting to brace said struc
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