thereof may be to any Required Angle of Inclination Automatically.
Year: 1886

page_text: thereof may be Adjusted to any Required Angle of Inclination
Automatically.
I, WALTER BRIERLEY of Town Hall Buildings, Halifax, in the County of York,
Patent Agent, do hereby declare that I am in possession of an invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF CHAIRS, SO THAT THE BACK THEREOF
MAY BE ADJUSTED TO ANY REQUIRED ANGLE OF INCLINATION AUTOMATICALLY
which has been communicated to me from abroad by Ruscheweyh and Schmidt,
Manufacturers of Langenöls, near Lauban, Silesia, Germany, to be as follows:-
"
The object of this invention is the construction of chairs so that the person
sitting therein may at will adjust, change, or vary the inclination or angle of the
chair back to any required angle without any manupulation of racks, pins, or other
like contrivances.
Chairs constructed according to this invention comprise a loose back supported
or carried at each side by an iron strap or arm through which are fulcrum pin's
on which pins the back turns, the pins being carried in side blocks. To the
lower end of each of the straps or arms and hinged on a pin thereon is a twisted
strap of iron and which extends towards the front of chair, its front ends being
attached to a přece connected with the seat or bottom of the chair and which is
free to slide backwards or forwards upon its supporting frame. The iton arms and
straps connecting the back and the seat of the chair are not unlike a bell crank, so
that pressure against the back tends to press back the latter and to move forwards
the seat, the movement however being balanced by the action of a pair of bow
springs underneath, and extending across the moveable part of the seat. There is
likewise a slight lift given to the seat when moving forward by means of a short
link one end of the latter being connected to the front by the chair the other end
to the sliding seat.
WALTER BRIERLEY,
Town Hall Buildings, Halifax,

page_text: thereof may be Adjusted to any Required Angle of Inclination
Automatically.
I WALTER BRIERLEY of Town Hall Buildings Halifax, in the County of York,
Patent Agent do hereby declare the nature of the said invention for "IMPROVE-
"
MENTS IN THE CONSTRUCTION OF CHAIRS SO THAT THE BACK THEREOF MAY BE
ADJUSTED TO ANY REQUIRED ANGLE OF INCLINATION AUTOMATICALLY communi-
cated to me from abroad by Ruscheweyh and Schmidt Manufacturers of Langenola
near Lauban Silesia, Germany, 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 the construction of chairs so that the person
sitting therein may at will adjust, change, or vary the inclinations or angle of the
chair back to any required angle without any manipulation of racks, pins, or other
like contrivances.
Chairs constructed according to this invention comprise a loose back supported
or carried at each side by an iron strap or arm through which are fulcrum pins, on
which pins the back turns, the pins being carried in side blocks.
To the lower end of each of the straps or arms and hinged on a pin thereon is a
twisted strap of iron and which extends towards the front of chair, its front ends
being attached to a piece connected with the seat or bottom of the chair, and which
is free to slide backwards or forwards upon its supporting frame. The iron arms
and straps connecting the back and the seat of the chair are not unlike a bell
crank so that pressure against the back tends to press back the latter and to move
forwards the seat, the movement however being balanced by the action of a pair
of bow springs underneath and extending across the moveable part of the seat.
There is likewise a slight lift given to the seat when moving forward by means
of a short link one end of the latter being connected to the front by the chair the
other end to the sliding seat.
Such being the nature and object of the said Invention, the following is a
complete description of same reference being had to the accompanying drawings
forming a part of this specification in which
Fig. represents a vertical section cut through the chair following A. B Fig. 3
in the normal position of chair and backboard.
Fig. 2 is the same cut, the backboard being moved backward.
Fig. 3 is a view from beneath of the seat of the chair.
On the side boards a of the back L of the chair is fixed a flat iron bar b by
means of which the backboard can be moved round the bolt or pin c, the latter is
applied in the hind trestles of the chair.
flat iron bar or
The flat iron d
On the foreside
round the bolt
A second flat iron piece d is fixed on the lower end of the
lever b by means of the bolt or pin c¹ so that it may turn round it.
is connected with its other end to the loose and moveable seat S.
trestle of the chair is applied a lever f which is arranged to turn
or pin e; this lever also is connected with the seat of the chair by the turning
bolt a

page_text: The springs h and h', the one staying against the fore frame, the other against a
piece of wood i fixed on beneath the seat S press by the exercised tension the seat
continually against the back trestles. The latter are provided with a shoulder
piece which prevents the raising of the seat on its back end.
If now any one sits down upon the chair and leans backward, the backboard
will turn backward round the pin c whilst the lower end of the lever 6 moves
forward and forces therewith the flat iron piece d attached to the seat as well as
the seat proper to participate on this movement.
The fore-end of the seat will be raised slightly by the movement of the lever f
in which mean-time also the springs h and h¹ will be compressed, and as the springs
are made light or strong so will the movement of the backboard L be effected by
light or heavier pressure.
The weight of the person sitting down also contributes to push the seat forward
and to bring it in its normal position.
By these arrangements it is possible to bring only by leaning back the backboard
and with it the seat in any desired convenient position.
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,
In a chair the automatic displacement of the backboard L by means of two flat
iron bars 6 pivoting round the pin c fixed to the side boards a of the chair which
moves in combination with the flat iron pieces d and the levers of the seat S
simultaneously forwards, when a person sits down upon the chair, the backboard
and the other working pieces returning in their original position by the effect of
the springs h, h¹ and by the acting of the weight of the sitting person upon the
lever f.
זג
"
1000