Improvement on Barbers' Adjustable Chair.
Year: 1890

page_text: Date of Application, 31st May, 1890
Complete. Specification Left, 2nd Mar.. 1891-Accented, 4th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvement on Barbers' Adjustable Chair.
I, JAMES JOHNSTON, Hairdresser, 17, High Street, Dumbarton, in the County
of Dumbarton, do hereby declare the nature of my invention for IMPROVEMENT
ON BARBERS ADJUSTABLE CHAIR to be as follows:-
As at present made adjustable chairs for barbers are too complicated and
expensive and only suitable for shaving. In my invention herein shortly described
the chair has the appearance of an ordinary arm chair, only the arms and back are
movable. When in the position most suitable for hair cutting the arms and back-
are kept in that position by two pawls on the sides of the chair, these being kept
in their place by a balance weight. When the chair is to be used for shaving
the pawls are released by the hand or knee of the operator. The back and arms.
then fall into a reclining position being brought to rest on projections on the back
legs of the chair, entering corresponding recesses in the back. To put the chair
into its formner position, the back is simply pushed forward, and the balance weight.
locks it by means-of-the-pawls-on-the-sides:
Dated this 30th day of May 1890.
JAMES JOHNSTON,
Hairdresser, 17, High Street, Dumbarton.
COMPLETE SPECIFICATION.
Improvement on Barbers' Adjustable Chair.
I, JAMES JOHNSTON,, of 17, High Street, Dumbarton, in the County of
Dumbarton, Hairdresser, do hereby declare the nature of the said 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 barbers' adjustable chairs and has for object to
render them less complicated and expensive than they have been hitherto.
In carrying out my invention I joint the arms and back of the chair to one
another and to the seat so that the back can be placed at any required angle, and I
provide pawls which advantageously engage with notches in the arms so as to
retain the back of the chair in the said angular positions, the pawls being kept in
engagement with the notches by a suitable weight or its equivalent. Projections
are formed on the seat of the chair which act as stops for the back of the same
when in its extreme rearward position.
In order that my invention may be clearly understood reference is had to the
annexed drawing, in which,
Figure 1 is a side elevation of my improved chair and Figure 2 is a plan of the
same.
Figure 3 is a view of the joint between the back and the seat and Figure 4 is a.
view of the joint between one of the arms and the seat.
Similar reference letters are used to indicate similar parts in the various figures.
a indicates the back of the chair, which is jointed to the back of the seat band to
which are jointed the arms, each arm comprising the two parts c d, the latter of
which is jointed to the seat b. e e indicate the pawls which are advantageously
arranged on the ends of a shaft f mounted in bearings in the seat and provided
with the weight g which serves to keep the said pawls in engagement with the
notches formed in plates on the lower parts of the portions d of the arms. i is
a handle on the shaft, which handle serves to disengage the pawls e e from
TD 27

page_text: the notches hh. jj indicate the projections or stops on the rear of the seat of the
chair for stopping the back in its extreme rearward position shewn by the dotted
lines in Figure 1.
By this construction of chair it will be seen that the pawls e e can by engaging
with the notches h h hold the back a firmly in position and if it be required to alter
the position of the back the pawls must be disengaged from the notches and
re-engaged with notches in another position, the back, however, when in its extreme
rearward position bearing against the stops jj.
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 I
claim is:
(1) The combination with a chair, the back and arms of which are jointed in the
manner hereinbefore described, of means for holding the said back and arms in any
required position substantially as described and illustrated in the accompanying
drawing.
(2) The improved chair hereinbefore described and represented in the
accompanying drawing.
Dated this 24th day of February 1891.
JAMES JOHNSTON.