IMPROVEMENTS IN СПЛІВЅ
Year: 1883

page_text: "
LETTERS PATENT to Friedrich Carl Glaser of Berlin in the Kingdom of
Prussia and Empiro of Germany, Engineer and Patent Solicitor for an
Invention of "IMPROVEMENTS IN СПЛІВЅ communicated to him by
F. W. Axel Erdmann a person residing in Wismar in the Grand-Dukedom of
Mecklenburg and H. Ruporti a person residing in Barmen in the Kingdom of
Prussia
PROVISIONAL SPECIFICATION left by the said Friedrich Carl Glaser at
the Office of the Commissioners of Patents on the 28th July 1883.
"
FRIEDRICH CARL GLASER of Berlin in the Kingdom of Prussia and Empiro
of Germany, Engineer and Patent Solicitor "IMPROVEMENTS IN CHAIRS
[communicated to him by F. W. Axel Erdmann a person residing in Wismar in the
Grand-Dukedom of Mecklenburg and H. Ruperti a person residing in Barmen in
the Kingdom of Prussia]
This invention relates to improvements in the construction of chairs having
adjustable seats, backs and footboards or leg rests.
According to the present invention the seat is so constructed as to be capable
of being slid backwards or forwards on the framing, so as to vary the position of
the centre of gravity of the chair, it being secured by setting screws or other
suitable known means in whatever position it is adjusted to. The back is hinge-
jointed to the seat and is supported by the arm rests which are jointed to the
framing, so that, by adjusting the seat, the angle of the back is also altered. To
the front edge of the seat is hinged a footboard or leg rest so arranged as to be
adjustable to form any angle with the seat.
According to another modification the seat can be increased or decreased in
depth, while at the same time, its height from the ground is altered in
proportion.
.
The chair is so arranged as to be capable of being folded together for facility of
transport. Figs. 1 to 5 on Sheet I of the accompanying drawings show one
construction of the before described improved chair. Fig. 1 shows a side view,
Fig. 2 a plan of the frame-work; Fig. 3 à section, Figs. 4 and 5 enlarged details.
Din Q,71

page_text: The framed of the seat is secured to the framing a of the chair by pinching
screws h passing through slots 1, 2, in a and having a lever-nut b' below, so that
the seat can be shifted on the frame and secured in position as before described.
The back of the chair is pivotted to the seat d at g, and is also connected to the
framing by the arm rests 7 pivotted thereto at 5. Thus it will be seen that on
shifting the seat backwards or forwards, the back will, by these connections, also
be made to assume varying angles. The leg-rest or footboard is pivotted to the
front edge of the seat, and carries beneath a bar o, secured to angle brackets m m',
and having rack teeth p. On this bar is a slider, having a pawl q pivotted thereto
nt 3 and gearing with the teeth of the rack. The slide is pivotted to two rods 88
connected at their other ends by a pin that, in one position, engages in a recess in
the loop u fixed to the seat, as shown in the drawing, the leg rest / being, in this
position of the rods, supported in a more or less horizontal or slightly inclined
position, according as the pawl q is made to engage with the one or the other of
the-teeth of the rack. The angle of the rest k can be varied at will by the person
sitting on the chair by means of a cord y connected to a stud won the rest, and
by a second cord y' passing over a guide pulley x and connected to the tail of the
pawl. On raising the rods & out of the recess of the loop u they can slide back
therein, and thus allow the leg rest to drop. The framing a of the chair and the
legs c, as also the frames of the seat, back, and leg rest, are by preference made of
angle iron to which is attached the wood-work b₁ of the cushions.
Figs. 1 to 5 Sheet II shew other constructions of the improved chair in which
the depth of the seat and its height from the ground can be altered. Fig. 6 shews a
section of the chair; Figs. 1, 2, 3, and 4 shew detached details, and Fig. 5 shews &
modified construction. The sent a is in this case pivotted in front to the legs k¹,
which are pivotted to the legs k, the continuation of which forms. the back m of
the chair. The back end of the seat is loose, and provided with rack teeth b, that
catch on to pins p projecting from the legs k, so that according as the legs and
-back are raised or lowered, so as to cause the pins to catch into the more forward
or more backward teeth of the ruck, the depth of the seat in front of the back will
be decreased or increased, while at the same time the height of the seat from the
ground will be raised or lowered, and the back will receive a greater or less
inclination. The arm-rests f, g, h are formned of articulated rods pivotted to the
back at i. The leg rest d is pivotted to the seat and is supported from the legs k
by a strut n the construction of which is shewn at Figs. 1 and 2. It consists of
two bars sliding upon each other and secured by a pinching screw, so that, according
as they are slid more or less apart, the leg rest is made to assume a more or less
horizontal position.
On unhooking the scat a froms the pins p, the several parts can fold flat
together.
Fin 5 shewa n similar construation without arm and lom vasts

page_text: '
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Friedrich Carl Glaser in the Patent Office on the 28th January
1884.
"
FRIEDRICH CARL GLASER of Berlin in the Kingdom of Prussia and Empiro
of Germany, Engineer and Patent Solicitor "IMPROVEMENTS IN CHAIRS A
communication to me by F. W. Axel Erdmann a person residing in Wismar in tho
Grand Dukedom of Mecklenburgh and H Ruperti a person residing in Barmen in
the Kingdom of Prussia.
This invention relates to improvements in the construction of chairs having
adjustable seats, backs and foot boards or leg rests.
According to the present invention, the seat is so constructed as to be capable of
being slid backwards or forwards on the framing, so as to vary the position of the
centre of gravity of the chair, it being secured by setting-screws or other suitable
known means in whatever position it is adjusted to. The back is hinge-jointed to
the seat and is supported by the arm rests which are jointed to the framing, so
that, by adjusting the seat, the angle of the back is also altered. To the front
edge of the seat is hinged a footboard or leg rest so arranged as to be adjustable to
form any angle with the seat.
According to another modification, the seat can be increased or decreased in
depth while, at the same time, its height from the ground is altered in proportion.
The chair is so arranged as to be capable of being folded together for facility of
transport.
Figs. 1 to 5 on sheet I of the accompanying drawings shew one construction of
the before described improved chair. Fig 1 shews a sectional side view, fig. 4 a
plan of the framework, fig. 5 a section, figs 2 and 3 enlarged details, fig 2 being
a section on line A. B, fig 3.
The frame d of the seat is secured to the framing a of the chair by pinching
screws passing through slots 1, 2, in a, and having a lever-nut h¹ below, so that
the seat can be shifted on the frame and secured in position as before described.
The back of the chair is pivotted to the seat d at g, and is also connected to the
framing by the arm rests g³, pivotted thereto at 5. Thus it will be seen that on
shifting the seat backwards or forwards, the back will, by these connections, also
be made to assume varying angles. The leg rest or footboard is pivotted to the
frout edge of the seat, and carries beneath a bar o, secured to angle brackets m,
and having rack teeth p. On this bar is a slider having a pawl q pivotted thoreto
at 3 and gearing with the teeth of the rack. The slide is pivotted to two rods 8 8
connected at their other ends by a pin that, in one position engages in a recess in
the loop u fixed to the seat as shewn in the drawing, the leg rest le being, in this
position of the rods, supported in a more or less horizontal or slightly inclined
position, according as the pawl q is made to engage with the one or the other of
the teeth of the rack. The angle of the rest I can be varied at will by the person
sitting on the chair by means of a cord connected to the pawl q. On raising the
rods & out of the recess of the loop u they can slide back therein, and thus allow
the leg rest to drop. The framing a of the chair and the legs c as also the frames
of the seat, back and leg rest, are, by preference, made of angle iron to which is
attached the wood work b¹ of the cushions
8
Figs 1 to 6 sheet II shew other constructions of the improved chair in which the
depth of the seat and its height from the ground can be altered. Fig 6 shews &
section of the chair; Figs 1, 2, 3 and 4 shew detached details, and fig 5 shews a
modified construction. The seat a is, in this case, pivotted in front to the legs k¹,

page_text: which are pivotted to the legs k, the continuation of which forms the back m of
the chair. The back end of the seat is loose, and provided with rack teeth b, that
catch on to pins p, projecting from the legs k, so that, according as the legs k and
back are raised or lowered, so as to cause the pins p to catch into the more forward
or more backward teeth of the rack, the depth of the seat in front of the back
will be decreased or increased, while, at the same time, the height of the seat from
the ground will be raised or lowered, and the back will receive a greater or less
inclination. The arm-rests f, g, h are formed of articulated rods, pivotted to the
back at i. The leg rest d is pivotted to the seat and is supported from the legs k
by a strut n, the construction of which is shewn at figs. 1 and 2. It consists of
two bars sliding upon each other and secured by a pinching screw, so that,
according as they are slid more or less apart, the leg rest is made to assume a more
or less horizontal position. On unhooking the seat a from the pins p, the several
parts can fold flat together, for facility of transport. Fig. 5 shows a similar
_construction without arm and leg rests...
Having thus described the nature of this invention and in what manner the
same is to be performed, as communicated to me by my correspondents, I claim :-
First Constructing the seats of chairs, consisting of the underframe a with the
upper frame d adjustable thereon for varying the position of the centre of gravity
substantially as herein described, with reference to sheet 1 of the drawings
Second: In the arrangement of seats of chairs as set forth in the preceding
claim securing the upper frame d upon the lower one a by means of screws h and
nuts h¹.
Third In combination with the moveable upper frame d, referred to in the
first claim, the back ƒ pivotted thereto and connected by the jointed arm-rests g¹ to
the underframe a.
Fourth Constructing the leg rest in such manner that it can be adjusted to a
higher or lower position by means of the rods.s operating in combination with the
-pawl.q.and.toothed..rack-p, substantially as herein described. with_reference-to-
Sheet I of the drawings
Fifth The use for adjusting the position of the leg rest, of two rods n n sliding
upon each other, and secured by setting screws, substantially as herein described
with reference to Sheet II of the drawings.
Sixth: The arrangement of the toothed rack b on the underside of the chair
Foat for increasing or decreasing the depth and height thereof, as also for enabling
the same to be folded together for transport, substantially as herein described, with
reference to Sheet II of the drawings.
In Witness whereof, I the said Friedrich Carl Glaser have hereunto set my hand
and seal this twenty-first day of January in the year of our Lord, one thousand
eight hundred and eighty four.
•
FRIEDRICH CARL GLASER (L.S.}