Improvements relating to Adjustable Stools, Tables, and Platforms, and other like Articles.
Year: 1895

page_text: Date of Application, 21st Aug., 1895
Complete Specification Left. 19th May. 1896-4ccepted, 4th July, 1896
Date of Application, ist Aug., 1993
Complete Specification Left. 19th May. 1896-4ccepted, 4th July, 1896
PROVISIONAL SPECIFICATION.
Improvements relating to Adjustable Stools, Tables, and Platforms,
and other like Articles.
I, JOSEPH WILLIAM FITTER, of Britannia Works, Cheapside, in the City of
Birmingham, Manufacturer, do hereby declare the nature of this invention to be as
follows
This invention consists of improvements in the adjusting mechanism or appliances
whereby the seat of a music or other stool or chair, the top of a table, or of a
pulpit or other stand or platform, may be readily adjusted to the required height
or level.
The object of my invention is to so construct and arrange the mechanism as to
permit of easy adjustment, and to obtain a very firm or rigid support to the seat or
platform at any position within the range of adjustment.
In the application of my invention to the construction of a music stool, I employ
the ordinary legs or supports and secure to the upper ends of the same a wood or
other base piece or framing. Upon the upper side of this base or framing I fix
bearings or supports for carrying a right and left hand screw having at one or both
ends a handle, knob or other fitting for enabling the screw to be conveniently
turned or revolved. At opposite ends of the base or framing I pivot upon suitable
lugs or ears secured to the base, a cast iron or other framed or braced stay, and
connect the outer end of each stay, by means of a pin joint, with the centre of a
strut lever attached at one end to the lower side of the seat, and having a screw
nut or internal thread at the opposite end to work with the right and left hand
screw herein before described. The strut lever attached to the one side or end of
the seat has a right hand screw thread or nut at its lower end whilst the lever at
the opposite end of the seat has a left hand thread, corresponding with the right
and left hand threads of the operating screw.
1 preferably form the strut levers from two side pieces with a base or bottom'
cross piece rivetted thereto. The nut or internally screwed boss of each lever.
slides, when in motion, upon a plate or bar attached to the base or framing.
Upon turning or revolving the screw in one direction the lower ends of the strut
levers are drawn towards each other and the seat is lowered, but upon turning in
the opposite direction the levers are forced away from each other in opposite.
directions and the seat is raised. The seat is firmly supported at any position
within its range of travel, by the framed or braced stays and the strut levers.
pivotted thereto and no movement of the seat can occur until the operating screw
is turned or revolved. Any movement of the strut levers produces a corresponding.
movement of the stays about their pivot supports, the lengths of the stays and
struts being such as to produce by their combined motion a parallel vertical.
movement of the seat, whilst preserving a straight line horizontal motion of the
lower ends of the struts.
The application of my invention to the construction of an adjustable chair, table,.
pulpit stand, or other article, differs only in the varying combination of the parts
to suit the particular purpose required, from the construction and arrangement of
a music stool as hereinbefore described.
Dated this 20th day of August 1895
:
:
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.

page_text: Improvements relating to Adjustable Stools, Tables, and Platforms,
and other like Articles.
I, JOSEPH WILLIAM FITTER, of Britannia Works, Cheapside, in the City of
Birmingham, Manufacturer, 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 consists of improvements in the adjusting mechanism or appliances-
whereby the seat of a music or other stool or chair, the top of a table, or of a
pulpit or other stand or platform, may be readily adjusted to the required height
or level.
The object of my invention is to so construct and arrange the mechanism as to
permit of easy adjustment, and to obtain a very firm or rigid support to the seat or
platform at any position within the range of adjustment.
In the accompanying sheet of explanatory drawings to be hereinafter referred to.-
Figure 1 is a side elevation, Figure 2 a plan, and Figure 3 an end elevation,
representing a music stool fitted with my improved adjusting mechanism.
The same reference letters in the different views indicate the same parts.
In the application of my invention to the construction of a music stool, I employ
the ordinary legs or supports and secure to the upper ends of the same a wood or
other base piece or framing A. Upon the upper side of this base or framing A,
I fix bearings or supports such as B for carrying a right and left hand screw C
having at one or both ends a handle, knob, or other fitting, for enabling the screw
to be conveniently turned or revolved. At each end of the base or framing I pivot.
upon suitable lugs or ears D secured to the base, a cast iron or other framed or
braced stay such as E, and connect the outer end of each stay by means of a pin
joint F, with the centre of a strut G pivotted at one end to the lower side of the
seat H, and having a screw nut G₁ at the opposite end to work with the right and
left hand screw C herein before described. The seat or top H is shown by dotted
lines at Figure 2. The strut or strut lever attached to the one side or end of the
seat has a right band screw thread or nut at its lower end, whilst the strut at the
opposite end of the seat has a left hand thread, corresponding with the right and
left hand threads of the operating screw C.
I preferably form the struts G from two side pieces with a base or bottom cross
piece such as G³ pivotted thereto as shown at Figures 2 and 3. The nut or
internally screwed boss G' of each strut is preferably arranged to slide when in
motion, upon a plate or bar J attached to the base or framing A. By thus causing
the nuts to rest or bear upon the base I relieve the screw C from lateral or
transverse stress.
Upon turning or revolving the screw C in one direction the lower ends of the
struts Gare drawn towards each other and the seat H is lowered, but upon turning
in the opposite direction the struts are forced away from each other and the seat is
raised. The seat is firmly supported at any position within its range of travel by
the framed or braced stays E and the struts G pivotted thereto at the joints F,
and no movement of the seat can occur till the operating screw is turned or
revolved.
The struts G and stays E being thus arranged, their combined and simultaneous
motion produces a parallel vertical movement of the seat H whilst preserving a
straight line horizontal movement of the lower ends of the struts.
The application of my invention to the construction of an adjustable chair, table,
pulpit stand, or other article, differs only in the varying combination of the parts

page_text: to suit the particular purpose required, from the construction and arrangement of
a music stool as herein before described.
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. In adjusting mechanism for stools, tables and platforms, and other like
articles, the combination consisting of struts pivotted at one end to the seat or
platform, and provided at the opposite end with nuts having right and left hand
threads respectively for operation by a right and left hand screw, with stays
having their ends pivotted respectively to the struts and to the base or support
substantially as described.
2. The improved mechanism for adjustable stools, tables, and platforms, and other
articles, arranged substantially as and for the purposes hereinbefore described and
as illustrated in the accompanying drawings.
DAL 1
CM
1000
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant..