Improvements in Infants' Chairs.
Year: 1890

page_text: Date of Application, 3rd Mar., 1890
Complete Specification Left, 1st Dec., 1890-Accepted, 3rd Jan., 1891
PROVISIONAL, SPECIFICATION.
Improvements in Infants' Chairs.
1, THOMAS FERGUSON of 104 Cowcaddens Street, Glasgow, in the County of
Lanark, Cabinetmaker, do hereby declare the nature of this invention to be as
follows:
This invention relates to that class of infants chairs in which the legs work on
pins or joints so that the body of the chair may be raised or lowered.
Under the invention there is secured to each of the fore legs of the chair a
plate which has a pin or journal extending into the chair body. On the said plate
two other pins are formed or secured which pins act as fulcrums or centres for
two straps these being arranged to cross each other. To each of the back legs
of the chair there is also secured a plate which has a pin or journal extending
into the chair body and two other pins or fulcrums on which the ends of the
crossed straps opposite to those connected to the fore legs work. The plates secured
to the hind legs have each a series of holes arranged in arc of a circle in con-
junction with which there is provided a bolt which slides horizontally in guides in
a rail at the bottom of the chair body. The inner ends of these bolts are connected
to wires or the like the opposite extremities of the wires being attached to cranks
or to pins of a single crank situated or formed on a spindle which is carried in
bearings in the chair rail before mentioned. On the spindle another crank is also
formed or fixed the longitudinal axis of both cranks being in the same plane. To
the second mentioned crank there is connected a wire or the like which passes up
the back of the chair and by pulling which the spindle carrying the cranks is so
turned as to withdraw the bolts from the holes in the plates of the back legs in
which they had previously been situated thereby enabling the chair body to be raised
or lowered. In conjunction with each bolt a plate or other spring is provided the
function of which is to force the bolt into another hole in the plate immediately the
pulling on the wire is stopped and thereby to lock the legs of the chair in position.
Dated this First day of March 1890.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Infants' Chairs.
I, THOMAS FERGUSON of 104 Cowcaddens Street, Glasgow, in the County of
Lanark, Cabinetmaker, 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 :-
This invention relates to that class of infants chairs in which the legs work on pins
or joints so that the body of the chair may be raised and lowered.
Under the invention which is illustrated in side elevation at Figure 1, in back end
elevation at Figure 2 and in detail of the joint by Figures 3, 4 and 5 of the appended
drawings there is secured to each of the fore legs a of the chair a plate 6 which has a
pin or journal e extending into the chair body d. On the said plate two other pins e e
are formed or secured which pins act as fulcrums or centres for two straps ff these
being arranged to cross each other. To each of the back legs g of the chair there is
also secured a plate h which has a pin or journal i extending into the chair body d and
two other pins or fulcrums jj on which the ends of the crossed straps ff opposite to
those connected to the fore legs a work. The plates & secured to the hind legs have

page_text: each a series of holes k arranged in arc of a circle and in conjunction with them there
is provided a bolt which slides horizontally in guides in a rail m at the back and
below the bottom of the chair body. The inner ends of these bolts are connected to
wires nor the like the opposite extremities of the wires being attached to arms of a
crank o situated or formed on a stud or spindle p which is carried in bearings in the
rail m.
Another arm o¹ of the crank having attached to it a wire y or the like which passes
up the back of the chair and by pulling which the spindle carrying the crank o is so
turned as to withdraw the bolts l from the holes k in the plates thereby enabling the
chair body to be raised or lowered. In conjunction with each bolt a helical or other
spring is provided the function of which is to force the bolt into another bole k in
the plate immediately the pulling on the wire is stopped and thereby to lock the
legs of the chair in position.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
1. In an infants chair the combination of apparatus constituting the joint for the
fore and rear legs substantially as described with reference to the accompanying
drawings.
2. In an infants chair a joint for the legs consisting of plates secured to each pair
of them and centred upon the chair body, crossed strap centred upon the said plates
connecting each pair of legs together and bolts which enter holes in the rear plates
and hold the chair in any desired position, substantially as hereinbefore described with
reference to the drawings annexed.
Dated this Twenty-ninth dox of November 1900
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.