Improvements in Adjustable Stools or Seats.
Year: 1889

page_text: Date of Application, 24th Sept., 1889
Complete Specification Left, 24th June, 1890-Accepted, 26th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Adjustable Stools or Seats.
I, THOMAS BOOTH of 33 Algeria Street, Buston Hill, Leeds in the County of York,
Mechanic, do hereby declare the nature of this invention to be as follows:-
The improved stool or seat constituting this Invention consists of a hollow standard
or leg having supporting feet or a supporting run or flange at its lower end whilst at
its upper
end it carries in brackets a tooth or pawl the point of which is directed
inwards towards the centre of the leg. In the hollow part of the standard a bar or
rod works vertically the said bar having the seat secured to its upper end. Throughout
its length the bar has a 'series of notches into which the pawl or tooth, enters and locks
the bar in position and accordingly as the bar is raised or lowered the height of the
stool or sent is adjusted vertically. Besides the notches the bar has a vertical groove
throughout its length into which a pin or tongue fixed in the hollow standard enters,
the said pin or tongue being of lesser breadth than the breadth of the groove.
When it is desired to raise the height of the seat the bar is lifted so as to release the
pawl from one notch and enter it into a lower one and when it is desired to lower
the seat the bar is first slightly raised to release the pawl from the notch with which
it had been engaged. It, together with the seat is then turned slightly round (the
distance being regulated by the breadth of the slot) to prevent the pawl from engaging
the notches, the bar and seat are then lowered the required distance and turned Back
thereby permitting the pawl to enter a notch and retain the seat in position.
Dated this Twenty-third day of September 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Adjustable Stools or Seats.
I, THOMAS BOOTH, of 33 Algeria Street, Buston Hill, Leeds, in the County of York,
Mechanic, 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 :-
The improved stool or seat constituting this Invention consists as seen in elevation
at figure 1 and in horizontal sections at figures 2 and 3 on the annexed drawings of
a hollow standard or leg a, having supporting feet or a supporting rim or flange at
its lower end. At its upper end the standard carries between brackets b, a pawl c;
which is centred on a pin or studs d, and has its point directed inwards towards the
centre of the standard. In the hollow part of the standard a bar or rod e, works
vertically the said bar having the seat, secured to its upper end. Throughout its
length the bar e, has a series of notches or ratchet teeth g, into which the pawle, enters
so locking the bar and seat, in position and accordingly as the bar is raised or lowered
the height of the seat is adjusted vertically. Besides the notches the bar has a vertical
groove h, throughout its length into which a pin or tongue i, fixed in the hollow
standard α,
enters the said pin or tongue being of lesser breadth than the breadth of
the groove h.
When it is desired to raise the height of the seat the bar e, is lifted the shape of the
notches or teeth y, enabling that to be freely done against the action of the pawl c,
whose point is thrown outward as each tooth passes it until the desired height is
attained when the pawl entering a tooth or notch prevents the bar and seat from
moving downwards. When it is.desired to lower the seat the bar e, is first slightly
raised to release the pawl c, from the notch with which it liad been engaged. The bar

page_text: and seat are next turned slightly round as indicated on Figure 3 (the distance being
regulated by the pin or tongue i, in the groove h) to prevent the pawl c, from engaging
the notches or teeth g, and the bar and seat are then lowered the required distance
and turned hack through the same are as indicated by figure 2 thereby permitting the
paw! c, to enter a notch g, and retain the seat in position.
The Invention is applicable to office chairs and stools, music stools, stools for
factories, warehouses shops and generally where it is required to have the height
of the seat adjustable and it may also be applied to occasional tables and
such like.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. In a chair stool or other seat the arrangement of apparatus for adjusting the
height of the seat substantially as described with reference to the drawings
annexed.
2. As a height adjusting arrangement the combination of a hollow standard or
socket a bar having ratchet teeth g, and a groove h, working within said socket
sleeve together with a pawl c, and pin, substantially as described, with reference to
the accompanying drawings.
3. As a height adjusting arrangement the combination of a hollow standard or
socket a bar working within said socket having ratchet teeth and a pawl to retain it
in position and means for permitting and controlling a partial rotation of the bar to
disengage the pawl.
Dated this Twenty-third day of June 1890.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.