IMPROVEMENTS IN ADJUSTABLE CHAIRS, SOFAS AND OTHER ARTICLES OF FURNITURE
Year: 1885

page_text: We CHARLES BAKER and GEORGE HOWARD CLACK both of tho Firm of Baker
& Clack of Wells Road in the City of Bath Cabinet Manufacturers do hereby
declare the nature of said Invention for IMPROVEMENTS IN ADJUSTABLE CHAIRS,
SOFAS AND OTHER ARTICLES OF FURNITURE" to be as follows:-
The object of our Invention is to provide simple and efficient means easily
actuated for enabling the relative positions of the parts of articles of furniture such
for example as the position of the backs of chairs relatively to the seats thereof or
the position of the scrolls or heads of Sofas relatively to the seat thoreof or the
vertical position of the seats of stools relatively to the supports thereof to be
readily adjusted as desired by the user-According to our Invention we effect the
adjustment by means of a screw working in a screw nut and situated in any
convenient part of the article of furniture such as for example in the arms of a
chair-This screw nut is beld so that it will rotate but will not move longi-
tudinally and it is rotated preferably by means of a bevel wheel thereon with which
gears another bevel wheel whose axis is brought to the exterior or other part of
the article of furniture where it can receive a handle in convenient position for
operation The end of the screw is connected by links or otherwise with the back
of the chair or other part whose position is to be adjusted relatively with the part
in which the screw and its operating mechanism is situated-By rotating the
handle the nut is rotated and the screw is therefore caused to travel longitudinally
and adjust the position of the back of the chair or other part of the article of
furniture which may be attached to the part relatively to which it is moved by a
hinge joint or otherwise.
There may be one or more of these devices employed to operate the one adjustable
part for example when applied to an arm Chair to adjust the back there may be
one of the said devices in each arm of the chair.
J. HENRY JOHNSON,
Agent for the said Charles Baker
and George Howard Clack,

page_text: We CHARLES BAKER and GEORGE HOWARD CLACK both of the firm of Baker
& Clack of Wells Road in the City of Bath Cabinet Manufacturers do bereby
declare the nature of this invention for "IMPROVEMENTS IN ADJUSTABLE CHAIRS
SOFAS AND OTHER ARTICLES OF FURNITURE" and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
The object of this Invention is to provide simple and efficient means easily
actuated for enabling the relative portions of the parts of articles of furniture such
for example as the position of the backs of chairs relatively to the seats thereof or
the position of the scrolls or heads of sofas relatively to the seat thereof, or the
vertical position of the seats of stools relatively to the supports thereof, to be
readily adjusted as desired by the user-According to our Invention we effect the
adjustment by means of a screw engaging in a screw nut and situated in any
convenient part of the article of furniture such. as for example in the arms of a
chair the said screw nut being held so that it will rotate but will not move longi-
tudinally but will cause the screw to move longitudinally-The said screw nut is
rotated preferably by means of a bevel wheel thereon with which gears another
bevel wheel whose axis is brought to the exterior or other part of the article of
furniture where it can receive a handle or its equivalent in convenient position for
operation by the hand. The end of the screw is connected by links or otherwise
with the back of the chair or other part whose position is to be adjusted relatively
with the part in which the screw and its operating mechanism is situated. By
rotating the handle the nut is rotated and the screw is therefore caused to travel
longitudinally and adjust the position of the back of the chair or other part of the
article of furniture which may be attached to the part relatively to which it is
moved by a hinge joint or otherwise.
There may be one or more of these devices employed to operate the one adjustable
part for example when applied to a music stool there may be one of these devices
situated centrally in the base part or stand of the stool and when applied to an
arm chair to adjust the angle of the back, there may be one of the said devices
in each arm of the chair.
And in order that the said Invention may be fully understood we will now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of Drawings the saine letters of reference
indicating corresponding parts in all the figures.
Figure 1 represents in elevation with one of the arms in section and Figure 2 in
plan with both of the arms in section our device as applied to a chair for adjusting
the back relatively to the seat-Figure 3 shews the application of the same device
to a music stool for adjusting, the top or seat relatively to the base or stand.
Referring to Figures 1 and 2. In the arm A of the chair there is a recess in
which is fixed the collar B by means of a stem b. thereon passing to the underside
of the arm and fixed by a nut b² (see the enlarged detail of this at Figure 14)

page_text: A female screw or nut C is capable of turning in this collar but is confined longi-
tudinally by the flange c at one end, and by a bevel wheel cat the other end.
Passing through this screw nut C is a screw D attached by a link d to the back of
the chair which is hinged at e to the framing of the seat-Mounted in bearings in
the arm of the chair is a short shaft F having on its inner end a bevel wheel ƒ and
on its outer end a handle ƒ³. By rotating this handle the bevel wheel f is rotated
and this rotates the bevil wheel c³ and the nut C in the collar B so that the
screw D is moved longitudinally in one or the other direction according to which
way the handle ƒ is turned and so the back of the chair can be inclined more or
less as desired. There may be one of these devices in one of the arms only, but
it is preferable to have one in each arm as shewn in Figure 2 and they must then
of course be operated simultaneously. Or the said device or devices may be
situated in any other convenient position. For example there may be one
such device situated on the central line of the seat from the back to front the
handle being in that case projecting from one side of the chair seat frame. Figure 3
shews the application to a music stool for raising and lowering the seat thereof.
The parts are identical as far as the device itself is concerned with the parts shewn
in Figures 1 and 2 and are marked with the same letters of reference but in order
to prevent the screw D from turning there is a groove d³ made in it in which
engages a projection or feather g on a bush piece or plate g³ fixed in the base part
of the stool. Guides which are apt to jam are therefore rendered unnecessary.
It will be understood that the said device or devices, may be applied generally to
articles of furniture for adjusting one part relatively to the other.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed we declare that what
wo claim is
First In combination with chairs, sofas, music stools or other articles of
furniture a screw nut which is mounted so that it can be rotated but cannot move
longitudinally and provided with means for rotating it and having engaged with it
a longitudinally moveable screw connected with the part to be adjusted substantially
as hereinbefore described.
•
Second-The arrangement and combination of parts constituting the adjusting
device for altering the position of one part of a chair, sofa, music stool or other
article of furniture relatively with another part of the same article substantially as
herein before described and illustrated in the accompanying drawings.
Dated thin autoanth down of Tinn 100
1005
CHARLES BAKER.
GEORGE HOWARD CLACK.