Improvements in Music Stools, or Seats for other purposes.
Year: 1892

page_text: Date of Application, 17th Feb., 1892
Complete Specification Left. 17th Nov.. 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Music Stools, or Seats for other purposes.
I, CHARLES HENRY WALLWORK, of the firm of Henry Wallwork & Co. of
Union Bridge Iron Works, Manchester, in the County of Lancaster, Engineer,.
do hereby declare the nature of this invention to be as follows:-
And relates more particularly to the method of raising and lowering the seat of
chairs or stools similar to music stools, or seats used in connection with sewing.
machines, type-writing machines and numerous other purposes where single seats
are required that will raise and fall.
I propose to make the stand preferably of metal, but may use a combination of
wood and metal. My improvement is placed in the pillar or stand part of seat.
It consists of forming by means of casting a coarse square thread of peculiar form
and in this thread are formed small recesses. The seat itself is secured to a spindle
and this spindle is provided with one or more small projections or rollers to work in
the above named thread, so that by rotating the seat it is raised or lowered and the
small projections or rollers when the hand is taken away from the seat fall into the
recesses and prevent the seat from going down unless it is required to do so.
In another modification I use the same form of projecting pieces or roller and
form upon the inside of the casting of the stand a series of projections or snugs in
such a form that the seat can be raised or lowered and by a slight twist can be-
secured in any desired position without any fear of the position being altered until.
required.
Dated this 16th day of February 1892.
COMPLETE SPECIFICATION.
Improvements in Music Stools, or Seats for other purposes.
I, CHARLES HENRY WALLWORK, of the firm of Henry Wallwork & Co., of
Union Bridge Iron Works, Manchester in the County of Lancaster, Engineer,
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 relates to seats or stools having vertical adjustment, as music
stools and seats used by operators of typewriting and sewing machines and is useful
for other purposes where adjustable seats are required, and consists chiefly of
improvements in the means of adjustment, the object being to hold the seat more.
firmly in its position and cheapen the production of such articles.
The improvements consist firstly in forming the pedestal with a cast moulded
internal screw thread of quick pitch having on the upper surface of the thread,
recesses or rests at intervals, and in place of a screwed spindle, I fit therein a plain
spindle having one, or more than one, projection which engages in the thread and
rests in the recess at the desired position. The thread being quick, the weight of
the seat top and spindle has a tendency to slip down the screw which the recess.
therein obviates.
In a modification of this invention, in place of moulding a screw thread in the
pedestal, I form projections or snugs at intervals therein upon which the projections
on the spindle rest, about a quarter-turn of the spindle being necessary to permit it
to be raised or lowered.

page_text: On the accompanying drawings
Figure 1 is a part sectional elevation of a pedestal showing the internal screw
thread and recesses therein.
Figure 2 is a portion of the spindle for carrying the seat.
Figure 3 is a part sectional elevation of a pedestal showing the modification of
my invention before referred to.
Figure 4 is a section across line in Figure 3.
Figure 5 is a portion of the seat spindle used in this modification.
Referring to Figures 1 and 2, the screw A is by preference a V-threaded one of
quick pitch. Upon the upper surface of the thread a are formed recesses or rests b,
preferably as shewn. The spindle, of which the lower end is shewn in Figure 2, is
fitted or formed with a stud or projection B, which, when the spindle is turned
round in the pedestal, follows the course of the thread and falls into position in any
one of the recesses b. If desired a roller may be mounted upon the stud B.
Referring now to Figures 3, 4 and 5, which show a modification of my invention,
in place of the internal screw thread 1 form one or two ladders of rests or
seats C, C, preferably two, which are arranged so that they open outwards in
opposite directions. The end of the spindle-Figure 5-is preferably fitted or
formed with two studs or projections D D', which rest in the seats C, C', and when
it is required to raise or lower the spindle, it is first given a quarter turn which :
disengages it.
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 adjustable seats the arrangement of a cast moulded screw thread. in the a
pedestal, recessed at intervals, and a spindle having one projection, or more than
one, to engage in the screw thread moulding and recesses, substantially as and for
the purposes hereinbefore described and illustrated by the drawings.
2. In adjustable seats the arrangement of a tubular pedestal provided with
internal concave or recessed projections or rests at intervals and a spindle with one, 3
or more than one, projection to sit upon the rests, substantially as and for the
purposes herein before described and illustrated by the drawings.
Dated this 16th day of November 1892.
R. J. URQUHART,
57, Barton Arcade, Manchester, 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.