Year: 1887

page_text: Date of Application, 23rd May, 1887.
Specification Accepted, 12th Aug., 1887.
1; IDA FRANZISKA CLASEN, Merchant, of Berlin, in the Empire of Germany, do
hereby declare the nature of this invention 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 the hereinafter described invention is to make folding-chairs and
rocking folding-chairs, which can be placed in any desired position and the seat of
which can be set at any desired height.
Referring to the drawings annexed Figure 1 and Figure 2 show a folding chair,
made in accordance with my improvements, shut up in Figure 1 and opened in
Figure 2. Figures 3 and 4 show a rocking folding-chair, Figure 3 showing such
rocking chair shut up and Figure 4 showing it opened.
Figures to 9 show detailed parts of the chairs. Figure 5 shows the adjustable
foot o of the back legs of the rocking chair on the rocker or rocking frame m.
Figures 6 and 7 show the two hinges or connectors a and a¹ which fit on the legs of
the chairs; Figure 6 being one of them taken off from the one above it and Figure 7
the two connectors a a¹ put together.
Figure 8 shows a part of the indented chair frame on which the connector a is fixed.
Figure 9 shows (in section) the two connectors or parts a joined together.
The two chair frames are indented at the back or upper or lower sides as at q 9,
and on them are set or fitted the connectors a, two of which go together in each case
and form a separate pair. One connector of each pair has in the centre a tenon, pin,
or axis c, which is firmly united with it, (Figure 6), and also two curved slots b b¹.
In these curved slots, two pins ff catch, which pins are set on the corresponding
connector a¹ (Figure 6); this connector a¹ also has a hole corresponding to the tenon
or pin c on the connector a. These two connectors, which together form a pair, can
be twisted round one against the other at will, but they always remain together,
because the tenons or axes c and pins f f¹ are provided with small heads, cƒ ƒ
(Figure 9) respectively. The chair frames are pushed through the rectangular or
other suitably shaped apertures in the connectors a a¹.
Each of the connectors a a¹ has, on that surface which corresponds to the indented
side of the chair frame, a suitable spring p, which is attached to the connector and

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presses into the teeth q on the chair frame. In this way, by lifting the spring
of the teeth y, the height of the seat and of the back can be adjusted at will. Upon
sitting on the chair, the springs p press against the teeth q on the chair-frame, and
thus prevent the chair from sinking down, (see Figures 1 and 2). According to the
height at which the seat of the chair is set, the legs of the chair are more or less
spread out.
In a rocking chair, the front legs are attached on pins (or with hinges) x x
Figure 4 to the rockers m m and can turn on these hinges or pins while the hind legs
ride with slits o o on the rockers m m.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In folding chairs and rocking folding chairs the connectors a. a¹ one of which a
is provided with a tenon axis or pin c, and two curved slots b. 6¹ while the other has
two pins f. f corresponding to the curved slots b. b¹ the connectors a. a¹ being made
hollow and slid on to the frame of the chair substantially in the manner described and
represented in Figures 1. 2. 3. 4. 6. 7 and 9 of the drawings hereto annexed.
2. The springs p on the connectors a, gearing into the teeth q substantially in the
manner and for the purposes hereinbefore set forth.
3. In rocking folding chairs, the turning attachment of the front legs by means of
pins or hinges c. x. on the rockers m. m and the adjustable attachment of the hind
legs by the adjustable foot o, on the rockers m. m. substantially as herein before set
forth.
4. The improved arrangement and construction of folding chairs and rocking
folding chairs substantially in the manner and for the purposes herein before described
and represented in the drawings hereunto annexed.
Dated this 23rd day of May 1887.
TONGUE & BIRKBECK,
34, Southampton Buildings, London, W.C.,
Agents for the Patentee.