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Патент USA US2117821

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May 17, 1938.
I ,
_
c. H‘. PARKER
2,117,821
0mm
Filed March 5, 1936
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1
INVENTOR
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. ‘-
‘CLYDE h’, PARKER
mi’
ATTORNEY
May 17, 1938.
‘c. H. PARKER‘
2,117,821
CHAIR
Filed March 5, 1936
2 Sheets-Sheet 2 v
NS\\IN.
INVENTOR
60/05 H PAR/(ER
I
1%3'
2,117,821
Patented May 17, 1938
- UNITED
STATES
PATENT OFFICE
2,117,821
CHAIR
Clyde H. Parker, Bedford, Ohio, assignor to The
B. L. Marble Chair Company, Bedford, Ohio,
a corporation of Ohio
Application March 5, 19-36, Serial No. 67,260
.3 Claims. (Cl. 155—184)
This invention relates to improvements in is positioned within the lower portion of the chan
chairs and more particularly ‘to stenographical
and clerical types and has for its primary object
to provide such a chair which correctly positions
the user in anupright posture without causing
fatigue or physical uncomfortableness.
It is believed that fatigue and like discomfort
which is experienced by persons required to use
the types of stenographical or clerical chairs
available at the present time is caused from the
application of pressure upon the base of the spine
as well as upon the spinal column itself. It is
therefore a further object of the present inven
tion to provide a chair especially constructed so
that the base of the spine and spinal column are
free from any pressure by direct contact with the
chair structure, but at the same time providing
a chair which is comfortable to sit in and which
tends to maintain the person in proper sitting
position.
-
With the objects above indicated and other
objects hereinafter explained in view, the inven
tion consists of the construction and combina
tion of elements hereinafter described and
2 UT.
claimed.
‘
Referring to the drawings,
Figure l is a side elevational view of a chair
embodying the present invention having a por
tion broken away to more clearly illustrate the
construction;
'
Figure 2 is a top plan view of the chair shown
in Figure 1;
'
Figure 3 is a fragmentary rear view of the seat
showing the features of the invention embodied
therein;
'
Figure 4 is a transverse sectional view of the
chair back showing the invention embodied
therein.
In the drawings I have illustrated a steno~
graphical chair embodying the present invention,
but it will be obvious that it is adaptable to other
types and therefore not limited in this respect.
The chair comprises a base H3 having a plurality
of angularly extending legs I I provided with open
45 ings in their under outer ends to receive casters
I2 by which the chair is supported and by which
it is freely movable over the floor or other sup
porting surface.
‘
A seat 13 is formed to any desired shape such
as shown in Figure 2 and angles M are bolted
at 15 or otherwise secured in spaced relation to
the under side thereof. A channel-shaped mem
ber 16 has its free ends bolted at H or otherwise
secured to the depending flanges of the angles
l4 and an inverted channel-shaped member 18
nel-shaped member 16 and riveted at l9 or other
Wise secured thereto, the bottoms of the members
being in spaced relation as more clearly shown in
Figure 1.
5
A post 20 has its upper end pivotally mounted ,
at 21 in the spaced bottoms of the members I3
and I8 and its opposite end exteriorly screw
threaded at 22 which is adjustably mounted in
a threaded sleeve 23 secured in the upper por~ '
tion of the base It). A hand wheel 24 is secured
to the post 20 between the member 16 and the
base I!) and by rotation thereof the seat 13 may
be raised or lowered with respect to the base ll]
to adapt the chair to the disposition of the user.
The seat I3 is padded on its upper side in the
usual manner, a pad 25 of felt, hair or other
suitable material being used and formed to. suit—
able shape such as shown in Figure 3. A cover
ing 26 of leather encloses the pad 25 and is tacked 20
or otherwise secured to the seat base in any well
known manner. Furthermore, the covering may
be of any other desirable material. The important feature of the invention resides in forming a
recessed portion 21 in the rear part of the seat 25
I3 of such depth that when a person sits natu~
rally on the seat, no portion will contact with the
end of the spine. The recessed portion 21 pref
erably tapers downwardly and rearwardly from
the top plane of the covering and has its point 30
of greatest depth at 28, approximately midway
of the rear portion of the seat as more clearly
shown in Figure 3. With this arrangement'the
full size of the seat is retained with the result
that a more comfortable seat is provided.
35
The chair is further provided with a back 29
which may be of any construction, but preferably
such as shown in the accompanying drawings. A
base plate 30 extends transversely below the seat
l3 and has a channel-shaped groove lit at its
central portion. A member 32 is provided with
a rib 33 which is of complementary shape and
normally disposed within the groove 3|. A slot
34 is provided in the rib 33 through which the
shank end of a bolt 35 projects. A suitable open
ing is provided in the base plate 3!! to receive the
bolt 35, the end of which receives a hand wheel
36 by which the base plate 39 may be secured
in the desired vertically adjusted position so as
50
to adapt the back to individual use.
The member 32 has inwardly extending side
members 31, the free inner ends of which are
pivotally connected at 38 to the adjacent depend~
ing legs of the angles [4, as more clearly shown
in Figure 1. This permits the back 29 to be moved
2
2,117,821
longitudinally of the seat l3 to accommodate
the former to the comfort of the person sitting
in the chair. A spring 39 is operatively con
nected with the seat l3 to yieldably resist the piv
rigid substantially ?at supporting base, a pad of
yieldable material disposed upon the upper side
of said supporting base and of complementary
oted movement of the back in its movement away
shape, said pad being formed with a recess in
from the seat and a hand wheel 40 is provided
for varying the tension in the spring 39.
Upright members 4| are spaced apart and have
their lower ends connected to the adjacent oppo
10 site ends of the base member 30 in any suitable
manner. The upper ends of the upright mem
bers 4| are connected by a cross member 42
15
20
25
30
preferably having a slight curvature as more
clearly shown in Figure 4. A back rest 43 is swiv
elly connected by hinges 44 to the upper end of
the uprights 4| inwardly thereof so that it will
upon engagement adjust itself to the back of the
person seated in the chair. A further important
feature of the invention resides in the manner
in which the padding is arranged upon the inside
of the back rest 43.
A pad 45 of felt, hair or any other suitable ma
terial is provided on the inside of the back rest
43 and has in the present instance a covering 46
of leather, although any other material may be
used. The marginal portion of the covering may
be secured to the back seat 43 by tacks 41 or any
other suitable means to enhance its appearance.
The pad 45 has a constricted central portion
providing a vertically extending groove 48 of
substantial depth and width to‘permit the spinal
column of the person occupying the chair to be
1. In a chair construction, a seat comprising a
its upper rear surface only, and a covering of
yieldable material enclosing the top and edges
of said pad and connected to said supporting base
in such a manner that the covering material ad
jacent the recess follows the curvature thereof, 10
said recess extending inwardly from the rear edge
of the seat in order to circumvent the end of the
spine of a person seated on the padded surface of
the seat, thereby preventing the application of
any appreciable pressure on the adjacent end of
the spine, and a back support secured to the seat
and having a back rest extending laterally there
of and comprising a rigid arcuate-shaped base, a
pad of yieldable material disposed upon the con
cave side of said base, said pad being formed with
a recess in its outer surface extending transversely
of its width, a covering of yieldable material en
closing the outer surface and edges of said pad
and connected to said base, and an elongated
strip of material disposed within said recess and
having its opposite ends connected to said base
in a manner to maintain the adjacent covering
material within said recess, said recess serving to
circumvent the adjacent portion of the spinal
column of the person seated on said chair, thereby
preventing the application of any appreciable
disposed therein without contacting any portion
pressure to the spinal column.
2. In a chair construction, a seat comprising a
of the back rest or pad.
substantially ?at supporting base, a pad of yield
This construction pre
35 vents any pressure being applied to the spinal
column throughout the extent of the pad. How—
ever, it permits contact between the back of the
person and the pad on the back rest to afford a
support therefor. This recessed portion or groove
40 48 may be formed by using a strip 49 of the cov
ering material and tacking the opposite ends to
the top and bottom edges respectively of the back
rest 43 as more clearly shown in Figure 2.
It will be noted in the construction illustrated,
45 a person sitting in the chair will be maintained
in an erect position and that in such position the
spinal column and the end thereof will not con
tact with the back rest and seat respectively.
This is due to the recesses provided in the seat
50 and back rest which do not in any manner result
in a chair which is uncomfortable. To the con~
trary, the chair is much more comfortable to sit
in, it maintains the person in an upright and
correct posture but at the same time prevents
55 pressure upon the spinal column which causes
fatigue and restlessness.
While I have described the preferred embodi
ment of the invention, it should be understood
that I am not to be limited thereto inasmuch as
60 changes and modi?cations may be resorted to
without departing from the spirit of the inven
tion as de?ned in the appended claims.
What is claimed is:
able material disposed upon the upper side of said 35
base, said pad having a generally V-shaped de
pression in its upper rear surface extending in
wardly from the central portion of the rear edge
thereof, and a back support secured to the seat
and having a back rest extending laterally there»
of and comprising a rigid base with a pad of yield~
able material attached thereto, said pad being
formed with a medial recess in its outer surface
extending transversely, of its width, so as to be
in the same vertical plane with the longitudinal 45
axis of the V-shaped depression and to prevent
the application of appreciable pressure to the base
of the spinal column or that portion thereof which
is adjacent the back rest when a person is sitting
properly thereon.
3. In a chair construction, a rigid base with a
seat pad attached thereon, said pad having its
sitting surface formed with a generally V-shaped
recess in its upper rear portion only and with its
edges rounded into the upper surface thereof, said
recess extending inwardly from the central por
tion of the rear edge of the seat and being of
greatest depth at said rear edge, in order to cir
cumvent the end of the spine of a person seated
thereon, thereby preventing the application of .1 -
any appreciable pressure to the adjacent end of
the spine.
CLYDE H. PARKER.
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