Improvements in and relating to Infants' Chairs.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Infants' Chairs.
1, ALEXANDER PLANT, of H. and A. G. Alexander and Company, Limited, Chair
Manufacturers, Eastfield, Rutherglen, in the County of Lanark, do hereby declare the
nature of my Invention to be as follows:-
This Invention has reference to improvements in and relating to devices for
actuating that class of chair known as the "American or adjustable baby chair" so
as to be convertible into a high chair, a low chair, a lower wheeling chair, and a
rocking chair respectively.
According to my Improvements I use two kneed levers, each formed as horizontal
and vertical angled arms, the lower ends of the latter being connected at opposite
sides of saddle frame to kneed locking pins which pass through the saddle frame and
enter holes or notches formed in one of a pair of segmental toothed wheels or
quadrants secured to the legs and gearing into each other. The vertical arins of the
kneed levers are each fulcrumed on pins secured to a cross rail between the vertical
cheeks of saddle frame, and the horizontal arms approach towards and overlap each
other vertically at their ends, and a pin secured to the end of the one arm works in a
longitudinal slot formed in the other arm.. A helical spring in tension has its one end
secured by an eye to this pin, while its lower end is secured to a pin on the
aforementioned cross rail.
A hand lever is fulcrumed at its one end to a pin on the cheek of saddle frame
below the seat, while its other end is kneed round to form a gripping handle.
short vertical bar is rivetted to near the centre of this hand lever, and its lower end
is formed with a slot to fit over the pin connecting the two kneed levers and be
secured thereto by a cotter.
With this arrangement of actuating devices the attendant by simply raising or
pulling up the free end of hand lever disengages the locking pins from quadrant and
the seat will lower itself until the pins come opposite the next hole in moveable
segmental wheel or quadrant where the pins will by the spring action of levers
automatically enter and lock themselves, while if the attendant keeps the hand lever
up the chair can be raised or lowered to any position for the time being desired, and
when let go the pins will automatically enter and lock themselves in the required
hole in quadrant.
Dated the 25th day of November 1896

page_text: COMPLETE SPECIFICATION
Improvements in and relating to Infants' Chairs.
I, ALEXANDER PLANT, of H. & A. G. Alexander and Company, Limited, Chair
Manufacturers, Eastfield, Rutherglen, in the County of Lanark, do hereby declare
the nature of my Invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement, that
is to say
This Invention has reference to improvements in and relating to devices for
actuating that class of chair known as the "American or adjustable baby chair" so as
to be convertible into a high chair, a low chair, a lower wheeling chair, and a rocking
chair respectively.
And in order that my said Invention and the manner of carrying same into practice
may be properly understood, I have hereunto appended an explanatory drawing in
which Figures 1 and 2 represent sectional elevations at right angles to each other
illustrating my improvements applied to an infant's chair.
Referring to these drawings:-
According to my improvements I use two kneed levers each formed as horizontal
and vertical angled arms a a¹ the lower ends of the latter a¹ being connected at
opposite sides of saddle frame to kneed locking pins b which pass through sleeves A¹
in the saddle frame A and enter holes or notches formed in one of a pair of segmental
toothed wheels or quadrants c secured to the legs B and gearing into each other.
The vertical arms a¹ of the kneed levers are each fulcrumed on pins d' secured to a
cross rail d between the vertical cheeks A of saddle frame and the arms a horizontally
approach towards and overlap each other at their ends, and a pin a secured to the
end of the one arın works in a longitudinal slot a³ formed in the other arm. A helical
spring e in tension has its one end secured by an eye to this pin a while its
lower end is secured to a pin e¹ on the aforementioned cross rail d.
A hand lever f is fulcrumed at its one end to a pin 2 on the cheek A of saddle frame
below the seat A2 while its other end f¹ is kneed round to form a gripping handle.
A short vertical bar g is rivetted to near the centre of this hand lever f and its lower
end is formed with a hole to fit over the pin a² connecting the two kneed levers and
be secured thereto by a cotter.
With this arrangement of actuating devices the attendant by simply raising or
pulling up the free end of hand lever f disengages the locking pins b from
quadrant c and the seat will lower itself until the pins b come opposite the next hole
in moveable segmental wheel or quadrant c where the pins will by the spring action
of levers a a' automatically enter and lock themselves, while if the attendant keeps
the hand lever f up the chair can be raised or lowered to any position for the time
being desired, and when let go the pins 6 will automatically enter and lock themselves
in the required hole in quadrant c.
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 infants' chairs the arrangement of kneed levers with pin and slot, spring and
actuating hand lever, substantially as herein described in reference to and shown in
the accompanying Drawings.