Improvements in Locking Apparatus for Adjustable Baby Chairs.
Year: 1899

page_text: Date of Application, 23rd Mar., 1899
Complete Specification Left, 5th Dec., 1899-Accepted, 6th Jan., 1900
PROVISIONAL SPECIFICATION.
Improvements in Locking Apparatus for Adjustable Baby Chairs.
I, HUGH ALEXANDER, of the Firm of H. & A. G. Alexander and Company,
Limited, of Eastfield, Rutherglen, in the County of Lanark, Chair Manufac-
turers, do hereby declare the nature of this invention to be as follows:-
This invention which relates to adjustable baby chairs has for its object to
simplify and improve the devices employed for operating the locking pins or
lockers by means of which the seats of such chairs are held in any position to
which they may be adjusted.
•
The locking pins or lockers are fitted horizontally in the seat frame and
engage the folding chair legs in the usual way when pressed outwards and
disengage them when drawn inwards. To the inner end of each locker is
jointed a lever, centred or fulcrumed on a cross rail or other fixture on the
seat frame, the lever on one side of the chair being a long and by preference
approximately vertical lever terminating in a handle or bent gripping end just
under the seat bottom. This hand lever has jointed to it at about its mid length
a link or rod attached at its opposite end to the lever jointed to the locker on
the other side of the chair. A helical or other spring conveniently attached to
the upper end of the hand lever and to the seat frame or at any other con-
venient point serves to force outwards the lower ends of the levers to which
the locking pins are jointed and holds the pins in the locking position. By
pulling outwards the handle end of the hand lever its opposite end which is
thus drawn inwards withdraws the locking pin attached to it, and at the same
time the lever by pulling through the connecting link on the shorter lever at
the opposite side withdraws the locking pin attached to it so that the chair
legs are disengaged and the height or position of the seat may be adjusted. On
releasing the hand lever the spring effects the return movement of the levers
and again presses out the locking pins into engagement.
... 00. "
1000
Improvements in Locking Apparatus for Adjustable Baby Chairs.
I, HUGH ALEXANDER, of the Firm of H. & A. G. Alexander and Company,
Limited. of Eastfield, Rutherglen, in the County of Lanark, Chair Manufac-
turers, do hereby declare the nature of this invention and in what manner the
[Price 817

page_text: same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This invention which relates to adjustable baby chairs has for its object to
simplify and improve the devices employed for operating the locking pins or
lockers by means of which the seats of such chairs are held in any position to
which they may be adjusted.
The invention is illustrated by the accompanying drawings, Figure 1 being a
vertical section of part of a chair, shewing the locking pins in engagement
with the chair legs, and Figure 2 is a like view shewing the locking pins with-
drawn from said legs.
The locking pins or lockers A are fitted horizontally in the seat frame B
and engage the folding chair legs C in the usual way when pressed outwards,
and disengage them when drawn inwards. To the inner end of each locker A
is jointed a lever, centred or fulcrumed on a cross rail E or other fixture on
the seat frame B, the lever D on one side of the chair being a long and by
preference approximately vertical lever terminating in a handle or bent gripping
end D just under the seat bottom F. This hand lever has jointed to it at about
its mid length a link or rod G attached at its opposite end to the lever D'
jointed to the locker A on the other side of the chair. A helical or other
spring H conveniently attached to the upper end of the hand lever D and to
the seat frame B or at any convenient point serves to force outwards the lower
ends of the levers D, D, to which the locking pins A are jointed and holds
the pins A in the locking position. By pulling outwards the handle end D³
of the hand lever D its opposite end which is thus drawn inwards withdraws
the locking pin A attached to it, and at the same time the lover by pulling
through the connecting link G on the shorter lever D' at the opposite side
withdraws the locking pin A attached to it so that the chair legs C are dis-
engaged and the height or position of the seat F may be adjusted. On
releasing the hand lever D the spring H effects the return movement of the
levers D, D³, and again presses out the locking pins A into engagement.
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 adjustable baby chairs locking apparatus constructed and arranged to
operate substantially as described.
Dated this 4th day of December 1899.
Dated this 4th day of December 1899.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow.
Agent for the Applicant.