Year: 1887

page_text: A clerical error in the original Specification having been amended by the
Patentee with the consent of the Comptroller, the printed Specification will now read
as shown by the following corrected line :-

page_text: Date of Application, 23rd Aug., 1887
Complete Left, 19th May, 1888
Complete Accepted, 22nd June, 1888
An Improved Mechanical Movement, Specially Applicable for
Adjusting the Seats of Music Stools and other Articles.
We GEORGE CLULOW, of 51 Belsize Avenue, in the County of Middlesex, Manu-
facturer, and FREDERICK STEVENS, of 80 Torriano Avenue, Camden Town, in the
County of Middlesex, Engineer do hereby declare the nature of this invention to be
as follows:-
This invention consists of an improved mechanical movement which we will describe
as applied to adjusting the height of the seats of music stools and other like articles
for which it has been specially designed; its application to other purposes will then
be readily understood.
In suitable bearings in the frame of the seat we mount a horizontal rod fitted at
one or both ends with a knob or handle for turning it. Near each end the rod is
formed with or carries a worm which gears with a segment of a worm wheel. This
segment is centred on a horizontal axis at the lower part of a vertical piece which is
carried by the seat frame and can move up and down in a vertical guide fixed to the
seat support. One side of the wheel segment is curved and bears against a fixed
point which for the purpose of diminishing friction is preferably fitted with a
roller.
The action is as follows:-When it is required to raise the seat the horizontal rod
is turned by means of one or both of the handles the worms are thereby caused to
move the wheel segments on their axes or centres but inasmuch as the fixed points
against which the segments bear with their curved sides as above stated obstruct
their axial movement they are compelled to rise as they move axially and in so
doing they lift the vertical pieces together with the seat. There is a stop on each
segment to prevent its rising too far. In order to lower the seat the reverse move-
ments take place.
J. C. MEWBURN,
169, Fleet Street, London,
Agent.

page_text: COMPLETE SPECIFICATION.
An Improved Mechanical Movement, Specially Applicable for
Adjusting the Seats of Music Stools and other Articles.
We GEORGE CLULOW of 51 Belsize Avenue in the County of Middlesex, Manu-
facturer and FREDERICK STEVENS of 80 Torriano Avenue," Camden Town in the
County of Middlesex, 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 consists of an improved mechanical movement which we will
describe as applied to adjusting the height of the seats of music stools and other
like articles for which it has been specially designed; its application to other purposes
will then be readily understood.
In suitable bearings in the frame of the seat we mount a horizontal rod fitted at
one or both ends with a knob or handle for turning it. Near each end the rod is
formed with or carries a worm which gears with a segment of a worm wheel. This
segment is centred on a horizontal axis at the lower part of a vertical piece which
is carried by the seat frame and can move up and down in a vertical guide fixed to
the seat support. One side of the wheel segment is curved and bears against a fixed
point which for the purpose of diminishing friction is preferably fitted with a
roller.
The action is as follows:-When it is required to raise the seat the horizontal rod
is turned by means of one or both of the handles; the worms are thereby caused to
move the wheel segments on their axes or centres but inasmuch as the fixed points
against which the segments bear with their curved sides as above stated obstruct their
axial movement they are compelled to rise as they move axially and in so doing they
lift the vertical pieces together with the seat. There is a stop on each segment to
prevent its rising too far. In order to lower the seat the reverse movements take
place.
The accompanying drawings represent a music stool with our mechanical move-
ment fitted thereto for the purpose of enabling the height of the seat to be adjusted
as required. Figure 1 is a side elevation, the seat frame and the seat support being
in section. Figure 2 is a transverse section and Figure 3 a plan with the seat
removed, the rod and worm being also removed from the right hand half of the
figure so as to show the worm wheel segment more clearly. The figures show the
seat partly raised. a a is the seat frame and bb the seat support which is shown as
fitted with four legs cc. The seat and the support are rectangular but this form is
optional. In bearings in the frame a a is mounted a horizontal rod d fitted at each
end with a knob or handle e, for turning it. This rod is formed near each end with
a worm which gears with a segment of a worm wheel. Each segment is centred
on a horizontal axis at the lower part of a vertical piece which is carried by the
seat frame a being fixed thereto by screws passed through the flanges or lugs kk.
The piece i can move up or down in a vertical guide 11 on a plate m fixed by screws
i
y

page_text: 9
to the seat support b. One side of the wheel segment is curved and bears against
a fixed point in the form of an antifriction roller p carried by lugs which project
from the plate m.
It will be readily seen that if the horizontal rod d be turned in the one direction by
means of one or both of the knobs e the worms will cause the wheel segments g to
move on their axes h, but inasmuch as the fixed points, that is to say, the rollers
against which the curved sides n of the segments bear obstruct their axial movement,
they are compelled to rise as they move axially and in rising they lift the vertical
pieces together with the seat. The curved sides n of the segments form the inner
sides of slots ss in which the rollers work and the bottoms of these slots constitute
stops to prevent the seat rising beyond a certain point. The reverse movement of the
rod d lowers the seat.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The mechanical movement hereinbefore described.
2. A mechanical movement for adjusting the height of music stool seats or other
articles, the said movement comprising a wormed rod gearing with worm wheel
segments centred on horizontal axes in vertical pieces which can move in vertical
guides, the segments having curved sides bearing against fixed points which by
obstructing the axial movement of the segments derived from rotation of the wormed
rod compel them to rise and to raise the seat or part to which they are fitted,
substantially as hereinbefore described.
1000
J. C. MEWBURN,
169, Fleet Street, London,
Agent.