Improvements in Apparatus for Raising and Adjusting the Seats or Upper Portions of Music Stools or other Furniture, and for Recording such Adjustment.
Year: 1888

page_text: Pate of Application, 11th June, 1888
'omplete Specification Left, 9th Mar 1380
Complete Specification Accepted, 11th May, 1839
Improvements in Apparatus for Raising and Adjusting the Seats
or Upper Portions of Music Stools or other Furniture, and for
Recording such Adjustment.
I, SAMUEL MARSDEN, of No. 5 Holm Terrace, Hunslet, Leeds, in the County of
York, Music Stool Manufacturer do hereby declare the nature of this invention to be
as follows, reference being had to the accompanying drawings, forming part of this
specification:-
:-
The object of my invention, is to construct a simple and effective apparatus,
whereby the upper or moveable portion of music stools, or of other furniture, may be
readily adjusted to any required height, or position, and securely held therem, and
also by means of a graduated scale or dise, to record clearly the different degrees of
adjustment.
DESCRIPTION OF DRAWINGS.
Figure 1 is a representation in section, of a duet music stool, having my apparatus
attached
Figure 2 18 a plan of figure 1 taken at the line A-B.
Figure 3 is an end section, taken at the line C-D of figure 2
Figure 4 is an end view of music stool, showing graduated scale.
Figure 5 is a modification of a part of my apparatus.
Figure 1 shows my apparatus, as attached to the wood framework of a duet
music stool
A is the upper or moveable portion. and B is the lower or fixed portion of
stool.
My apparatus in figure 1, is shown to be securely fastened to the upper framework
of stool, by means of the brackets F, and to the lower framework by the
brackets H.
The principal working mechanism of this invention, consists of the levers C and D,
at the right and left hand portion of stool respectively.

page_text: The right hand lever C, consists of two sets of arms, at right angles to each other,
and united together by a shaft, which also forms the fulcruin of the lever, and which
fulcrum, is held by, and works in, the brackets F.
The left hand lever D, is similar to the right hand lever, excepting, that it has only
one arm at the centre of the lever shaft, and which arm is shown in the drawing,
(figure 1.) to work below the centre of the lever shaft, but if found desirable, the
lever D may be placed in the same position on its fulcrum as the lever C.
Each lever with its arms and shaft, is preferably made of one casting.
The levers C and D, are connected together by the rod E, which is fastened to the
centre arm of each lever, and when thus arranged, it is obvious, that the two levers,
must move together, and in the same direction.
The outer arms of the levers C and D, are connected with the lower portion of
stool, or other article, by being pivoted to the link or hinge G, and which link, is in
turn supported, and held, by the small brackets or studs H If found inconvenient
to use the link or hinge G, in connecting the levers to the lower framework of stool or
other article, I purpose to employ a slide, or grooved piece of metal, (figure >) which
is fastened to the lower framework B, and opposite the outer arms of the levers
C and D, the extremities of which arms, are provided with a pin or stud, to work in
the said slide or groove, and thus, to securely support the upper fabric of stool or
other article, and, at the same time, to allow the necessary horizontal motion, at the
extremities of the levers C, and D.
The means by which I raise and lower the stool or other article, is the turnscrew I,
the nut N of which, is pivoted between the centre arms of the lever C The screw I,
passes through the framework, to the outside of stool or other article, and is held in
its place by the metal plate J, against which the collar of the screw works The
screw I is terminated on the outside, by a wheel or boss K, by turning which, the
operator moves the levers C and D on their fulcrums, and by this means raises or
lowers, the upper portion of stool or other article
As thus constructed, the whole of the upper portion of stool or other article,
is poised upon the links or hinges G, or upon the slides or grooved pieces of metal, as
(in figure 5), and would easily move towards either end, of the stool or other article,
to obviate this, and to keep the upper and lower portions of stool or other article
perfectly rigid I employ a rod 1, which is connected and lunged, to the upper portion
of stool or other article, by being fitted on the shaft of the lever C, and is securely
fastened to the lower framework B, by means of the screw or stud M.
In order to enable the operator to adjust the stool or other article to any certain or
required height, I employ a graduated scale, which is shown in figuie 4 as affixed to
the lower portion of the stool, and which scale is marked by horizontal lines at short
intervals, and which are numbered, so as to enable a child or other person, to always
adjust the stool or other article, to any known or required height. The graduated
scale may be also applied in the form of a disc, a pointer being used to denote the
adjustment.

page_text: Improvements in Apparatus for Raising and Adjusting the Seats
or Upper Portions of Music Stools or other Furniture, and for
Recording such Adjustment.
I SAMUEL MARSDEN of 5 Holm Terrace, Hunslet, Leeds in the county of York,
Music Stool 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
My present invention relates to music stools or other furniture which requires the
upper or movable portion thereof raising lowering or adjusting vertically from
time to time, and one object is to employ simple and efficient apparatus which by
suitable manipulation will readily adjust the movable portion or seat of a music stool
or other piece of furniture; and another object of this invention is to record by means
of a suitable indicator which is fixed to the said stool or furniture the various stages
or degrees of adjustment so that the seat of the music stool or other adjustable portion
of a piece of furniture may be regulated or placed to any desired height without it
being necessary to measure the same in the ordinary manner.
The
In order to attain the object herein first mentioned I employ two leve.s which are
carried on the underside of the seat of music stool or adjustable portion of other piece
of furniture, the said levers being situated in horizontal positions and some distance
apart and parallel to each other Each lever has two sets of arms arranged at right
angles or thereabouts and which spring from a central portion or shatt, the said shaft
being cranked or arranged with another arın somewhat shorter than the rest.
opposite ends of each lever are preferably reduced in diameter and are carried by
means of suitable brackets or fixings which are secured to suitable parts of underside
of adjustable portion of stool. The said reduced portions of each lever form a fulcrum
whereon each lever is free to move. The arms which are situated near the fulcrum of
each lever are connected to the stationary portion of stool by means of short links
Extending preferably along the centre part of the stool and immediately under the
seat thereof and at right angles to the said levers is a horizontal shatt, which is
supported at each end by a bearing which is secured to the adjustable portion of stool.
Each end of said horizontal shift extends somewhat beyond the sides of the stool and has
a suitable hand wheel attached or fixed firmly thereto A right handed thread is
formed on and commences near one end of said shaft, and in a similar position near
the opposite end thereof is formed a left handed thread, each of these threads receives
a nut which has a projection or pin at each s de at right angles to sand shift. Each
nut is connected by means of links to the inner arms of each lever and by this means
On
the whole of the adjustable portion of the stool is poised upon the said levers
turning either of the hand wheels it will be obvious that the nuts will travel in
opposite directions, thus causing the levers to either raise or lower the seat of stool,
during which operation however it is necessary to prevent lateral or oscillatory
movement of the adjustable portion of s.ool, and to cause the seat to ascend or
descend in a truly vertical plane and to remain in a rigid or. hrm position at any
height, for this purpose one end of a suitably formed stay rod is connected to the
cranked portion or shorter arm of lever, and the other end of said rod is connected to
1

page_text: the stationary portion of stool. It is preferred only to employ one stay rod, but two
may be employed if desired. When the nuts are caused to travel in manner herein-
before described the said stay rod is caused by means of the crank or shorter arm to
make a radial movement one way or the other thereby keeping the movement of the
seat truly vertical as will be well understood.
In order to enable the movable or adjustable part of the stool to be adjusted from
time to time with nicety to any stipulated or required height, which is the second
object of my present invention, I employ a graduated scale or plate, having a oblong
slot therein, and I fix the said scale upon the side of the adjustable portion of the stool.
The oblong slot receives the end of a pin which is free to slide therein and the other
portion of said pin is fixed to one end of a lever whose opposite end is pivotted to the
ends of two other levers upon a common centre pin or bolt, one of these other levers
has its opposite end connected to or fixed upon a pin which is secured to the stationary
portion of stool, and the other other lever has its opposite end secured to a pin
which is fixed to the adjustable portion of stool, by this means as the seat is raised or
lowered the end of the indicating pin travels one way or the other in the oblong slot,
and points to the indications marked upon the plate or scale, and thus denotes the
height of stool or other piece of furniture.
I wish it to be understood that I do not bind myself particularly to the use of a
screw for the moving of the nuts, or for the purpose of pressing the levers one
way or the other, and that any other suitable mechanical means may be employed for
this purpose
In order that my present invention may be more fully understood, and so that it
may be readily carried into effect, I hereunto attach a sheet of drawings of which the
following is a description
Fig. 1. 1s a sectional elevation of a music stool showing my improved apparatus
fitted thereto, the section being taken on line x, x, of Fig. 2, which is a sectional plan
taken on line 2, 2, of Fig. 3; Fig. 3 being a transverse elevation partially sectional
taken on line y, y, of Fig. 2.
Like letters denote corresponding parts in each view.
The stool or other piece of furniture is made with an adjustable portion A and a
stationary portion B, the said portion A being poised upon two levers which
are preferably arranged as shown at opposite parts of the stool and parallel to each
other. Each lever has two sets of arms d and e arranged at right angles to each
other or thereabouts.
Each lever has a cential portion or shaft c¹ the said portion of one of the said
levers being cranked at figs. 1 and 3. The ends of each lever C bear in and are
cared by suitable brackets or fixings J which are secured to the underside of the
adjustable seat A, and the said ends & form a fulcrum whereon the lever ( may move.
The arms e of levers C are linked to the portion B of stool by means of short links L
which are supported by pins 11 securely fixed to said portion.
A shaft M extends across the centre portion of the stool immediately under the seat
and runs at right angles to the levers C Each end of said shaft M has fitted thereon
a suitable hand wheel O, and is supported or cared by the bearings p
which are
securely fixed to the under portion of the seat A. The said shaft M has a right
handed thread q and a left handed thread » formed thereon each of which receives
a nuts which has either made with or attached to it suitable pins or projections a
which receive the ends of the links T whereby the levers are conne ted to said
heads or nuts. By means of arranging the apparatus as described the whole of the
adjustable seat A is poised upon the levers and the said seat A may be adjusted
vertically by turning either of the hand wheels O
In order to prevent any oscillatory movement of the adjustable seat A, during the
adjustment thereof, a stay rod Q is arranged having one of its ends connected to the
fixing which is firmly secured to the part B of stool, and the other end thereof is
connected to the crank portion y of lever U. By means of this stay rod Q the seat of
stool is caused to either ascend or descend in a truly vertical plane as will be well
undeistocd.

page_text: The arrangement as hereinbefore described and illustrated by means of the
accompanying drawings may where desired be reversed, that 13 instead of the shatt M
being carried under and by the seat A it may be carried upon the stationary portion B,
the bearings p being fixed to suitable parts of sud portion and the fixings J being
fixed thereto also, and of course the arins e are linked to the seat A instead of to the
portion B as will be well understood
In order to attain the second object of my present invention I secure a graduated
plate 10 upon the side of the seat A figs. and 3 The said plate 10 has a oblong
slot 11 wherein works the end of the pin or pointer 12 which is fixed to one end of the
lever 13. The said lever 13 is pivotted or works upon a pin 14 whereon also work
the ends of the levers 15 and 16. The opposite end of the lever 15 is connected
to the stationary portion of stool B by a pin or bolt 17, and the other end of the
lever 16 is attached or connected to the side of movable or adjustable seat A by means
of the pin 18
When the seat A of stool is being raised or lowered in the manner hereinbefore
described the varying degrees of adjustment are denoted by the end of the pin
or pointer 12 moving to the indications marked upon the face of the plate or scale 10.
It will be obvious that where preferied the plate 10 may be dispensed with and the
indications marked upon the side of the stool instead, the slot formed in the side
thereof supporting the end of the pointer 12. This apparatus may also be reversed
where desired the plate 10 or oblong slot 11 being fixed to or arranged in the
portion B, the pin 17 fixed to the seat A and the pin 18 fo the stationary portion B
of stool.
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 1
claim is -
1. The apparatus for adjusting the height of a music stool or other piece of
furniture substantially as described and illustrated in the drawings hereunto attached
or any mere modification thereof.
2. The combination of levers C with one or two nuts S substantially as arranged
and for the purpose specified
3 In apparatus for adjusting the height of music stool or other piece of
furniture the use of a stay rol Q in combination with the levers C substantially
as described.
4 The apparatus for indicating the height of the adjustable seat of a music stool
or other furniture substantially as set forth and shown at figs. 2 and 3 of the
drawings annexed, or any mere modification thereof
5. Applying indicating apparatus to music stools for the purpose of denoting the
height of the adjustable seats thereof, substantially as described.
Dated this 7th day of March 1889
H. F. BOUGHTON, MI.M.E,
Barnsley, Agent.