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Патент USA US2120341

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June 14, 1938.
2,120,341
0. N. SMITH
TILTABLE CHAIR
Filed June 11, 1937
2 Sheets-Sheet 2
J.
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Inventor
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Patented June 14, 1938
, 2,120,341
UNITED STATES PATENT OFFICE
2,120,341
TILTABLE 01mm
Orva N. Smith, Berne, Ind.
Application June 11, 1937, Serial No. 147,754
4 Claims. (Cl. 155-57)
This invention relates to upholstered furniture,
and has particular reference to a chair such as
is adjustably and tiltably mounted on appropriate
supporting means so that the seat is susceptible
5 of being disposed at varied inclinations with re
spect to the floor or other supporting surface.
The purpose of the invention is to provide
a tiltable, shiftable chair and coacting base means
making it possible to adapt almost any style or
form of a chair for coordination with said base
means and to practically transform the complete
assembly into a seat whose inclination may be
adjusted to suit the occupant and to thereby
promote restful comfort.
I am sufficiently conversant with the furniture
trade and the prior art which comprehends it to
appreciate that chairs and equivalent pieces of
furniture are equipped with tiltable backs, ad
justable seats, and other comforts to accommo
20 date the occupant. My aim is, therefore, to utilize
what may be called an ordinary or conventional
chair, upholstered or plain, wherein the same
can be bodily shifted and tilted to maintain the
back rest and seat in the same angular relation
25 with respect to each other, but to vary their
position in relation to the ?oor.
Other features ‘and advantages will become
more readily apparent from the following de
scription and drawings.
30
a
In the drawings, wherein like numerals are em
ployed to designate like parts throughout the
views:
.
'
Figure 1 is what may be called a side eleva
tional view of a conventional upholstered chair
35 showing the attached supporting base unit there
for constructed in accordance with my ideas.
Figure 2 is a sectional and elevational view
of the frame work detailing the orderly selected
and coordinated features found best to serve the
40 needed purposes.
Figure 3 is a view similar to Figure 2 with
certain of the features omitted for clearness of
illustration of the principle of operation.
Figure 4 is a bottom plan view showing the
45 adapter means on one of the side rails of the
base frame, that is, the frame of the base of the
chair.
'
Figure 5 is an enlarged detail vertical section
on the line 5-5 of Figure 2; and
Figure 6 is an elevational view of one of the
leg members of the two-part base imit or support.
Referring now to- the drawings by distinguish
ing reference numerals, it will be observed that
the chair, which is an upholstered conventional
65 type is denoted by the numeral 1. As brought
out for better illustrative purposes in Figure 2,
the back rest is denoted by the numeral 9 and a
seat or base frame is denoted by the numeral 9.
The latter part is generally rectangular in form,
and in accordance with the present conception, 5
opposed parallel side rails l9 thereof are pro
vided with adapter devices to coordinate with _
the duplicate members of the two-part leg
equipped base units or members II.
The base members are duplicate in construc 10
tion. That is to say, each member or unit ll
includes supporting feet 12 vto rest on the floor,
and further includes a central riser whose upper
curved surface I3 is in effect a seating crown for
the chair frame 9. Said part I3 is thus of convex
form and functions as a fulcrum for the relatively
tiltable and shiftable or slidable bodily adjustable
chair 1. In its preferred embodiment, the base
member ll is in the nature of a longitudinally
bowed leg frame. The central portion of the 20
under side thereof is provided with a keeper
notch M to accommodate a binding or retention
bolt [5 carried by the chair frame.
The adapter means on the chair frame which
is associated with the member II by way of said 25
bolt I5 is in two parts. Each part comprises a
retaining cleat I6 and an intervening rest or
adapter element ll. The cleat I6 is secured by
screwsor similar fastenings l8 to the adjacent
side rail, said fastenings I8 also serving to hold 30
in place the adapter element IT. The latter part
is in the form of a relativelyshort block or equiv
alent piece of wood, as vseen in Figure 3. The
top thereof is flush with the corresponding top
portion of the surrounding frame 9. The lower 35
edge portion is formed with a central clearance
notch l9 coacting with the underlying crown I3,
and further formed with a pair'of longitudinally
spaced and properly curved seating surfaces 29.
The curvature of these surfaces corresponds to , 40
the curvature of the crown portion of the base
unit ll. Thus, in effect, the unit ll ?ts between
the rails I9 and cleat l6, allowing rest I‘! to come
down on top of it to provide the desired adjust
able shifting and fulcruming coaction between 45
the base unit and chair.
It will be noted that the bolt l5 goes through
the rail ‘I0 and the cleat l6 ‘(see Figure 5) and
also extends through the keeper notch ll. The
ends or end walls of the notch 14 constitute 50
abutinents to limit the longitudinal or horizontal
shift of the chair in relation to the base members
ll. Also, the bolt hole in the cleat I6 is slightly
enlarged, as indicated at 2|, to accommodate the .
nut and threaded end of the bolt, as indicated
2..
_
2,120,841
'at 22. The opposite headed end of the bolt, as
shown at 23, is rockable in a countersunk recess
the curvature of said convexed surfaces corre
sponding to the curvature of the under sides of _
in the rails I0, Under this arrangement, the bolt, _said adapter blocks for matching coaction, and
when slightly tilted or canted, as shown in Figure
5, obtains a binding contact with the adjacent
or top edge portion of the notch _Il, thus locking
the chair on the base in any position to which
said chair has been adjusted-or tilted, as the case
may be.
It is thought that the description taken in con
nection with the drawings will enable a clear un
‘ derstanding of the invention to be had. There;
fore, a more lengthy description is thought un
necessary.
.
.
p
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a single bolt passing through each cleat and ad
jacent portion of the side rail to maintain the
parts assembled, said base units being provided
with longitudinally spaced stop shoulders with
which said bolts coact.
-
3. In a structural assemblage of the class de
scribed, a base frame including a side rail, ,an 10V
adapter block fastened to the inner surface of
said rail and having its upper edge ?ush with‘
the corresponding edge of the» rail, said adapter
block being of a length considerably less than
While the preferred embodiment of the in . saidrail, and the. under side thereof being lon 15
vention has been shown and described, it is to gitudinally curved to provide a concaved fric
be understood that minor changes coming within\ tion supporting and tilting surface, a cleat dis
the ?eld of invention claimed may be resorted \~ posed ln parallelism with the rail and block and
secured to the rail and forming a pocket between '
to if desired.
15
20
‘
I claim:
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I
_
1. In a structure of the class described, a chair
including a seat and an associated back rest, said
seat embodying a base frame and said frame in
' cluding adjoined side and end rails, cleats fas
tened to corresponding inner surface portions" of
25
, the side rails, and adapter blocks interposed be
itself and said rail, a longitudinally elongated
supporting and tilting unit, said unit having its
‘opposite ends formed into ?oor contacting feet
and having its‘ intermediate portion located in
the pocket between the rail and cleat, that sur
face of the unit underlying said block being lon
gitudinally curved to provide a convex support
tween the cleats and side rails, the lower edge ing'and friction fulcruming surface, the convexed
surface matching the concaved surface of said
portion of each adapter block being, longitudi
nally curved and the central portion of the curve > block, the intermediate portion of said unit hav
30 including an elongated clearance notch, and a ‘ing formed .therein a notch forming a bolt ac
' pair of base units for supporting said frame, each
30
commodatlon base as well as longitudinally spaced
unit being longitudinally bowed'with its bowed stop shoulders, and a'single bolt fastened trans
portion disposedbetween the adjacent rail and versely through the rail and cleat and extending
cleat and arranged inwmatchlng contact with the through said notch and bridging said pocket in
35
35 curved lower edge portion of the adapter block, the manner and for the purposes described.
4. In a structure of the class described, a chair
the lower edge portion of said base unit having
a notch therein, and a bolt located ‘in said notch ' including a seat and an associated back rest,
said seat embodying a base frame, and said frame
and connected with the adjacent cleat and rail. '
2. In a structure of the class described, a chair . including adjoined side and end rails, 'cleats se
40 including a seat and an associated back rest, said
cured to corresponding inner surface portions of .
seat embodying a base frame and said frame in said side rails, and adapter blocks interposed be
turn including'complemental adjoining side and ‘ tween the ‘cleats and side rails, the lower edge por
end rails, ‘duplicate cleats fastened to‘ correspond
ing inner' surface portions-of the side rails in op
45
posed relationship, and adapter blocks interposed
tion of each adapter block being longitudinally
curved to provide a supporting and frame shifting
and adjusting surface, and a pair of duplicate base 45
between the cleats and side rails, the upper edges 1 , units for supporting said frame, each unit being
of the cleats being substantially flush with the - longitudinally‘ bowed with .itsbowed upper edge
correspondingedges of said side rails, the lower
portion disposed between the adjacent rail and
edge portion‘ of eachadapter block being longi- . cleat and arranged in matching contact with the
curved lower edge portion of the complemental
50 tudinally curved from end to end to provide a con
cave chair ‘supporting surface; and a pair of adapter block, the lower edge portion of said base
base units for supporting and tilting said frame, ’ unit being provided with longitudinally spaced
said .base units being located in‘the existing stopv shoulders, and-an assembling and check bolt
pockets between the cleats and side rails, the passing through the cleat and companion rail '
upper edge portion of said base unit‘ being lon ' and located for limited bodily adjustment be 65
gitudinally bowed to provide a convex support
ing and fulcruming surfacefor the entire chair,"
tween said stop shoulders.
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O. N. SMITH.
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