IMPROVE- MENTS IN MUSIC STOOLS OR SEATS AND OTHER SEATS TO FACILITATE EFFECTING VARIATIONS IN THE HEIGHT THEREOF
Year: 1876

page_text: LETTERS PATENT to Henry Brooks, of the Firm of H. Brooks and Company,
of No. 31, Cumberland Market, Regent's Park, in the County of Middlesex,
Pianoforte Action and Key Manufacturer, for the Invention of "IMPROVE-
MENTS IN MUSIC STOOLS OR SEATS AND OTHER SEATS TO FACILITATE EFFECTING
VARIATIONS IN THE HEIGHT THEREOF.”
aled the 27th April 1877, and dated the 3rd November 1876.
PROVISIONAL SPECIFICATION left by the said Henry Brooks at the
Office of the Commissioners of Patents on the 3rd November 1876.
HENRY BROOKS, of the Firm of H. Brooks and Company, of No. 31, Cumber-
land Market, Regent's Park, in the County of Middlesex, Pianaforte Action and
Key Manufacturer. "IMPROVEMENTS IN MUSIC STOOLS OR SEATS AND OTHER
SEATS TO FACilitate EffeCTING VARIATIONS IN THE HEIGHT THEREOF.'
,,
The object of one part of the Invention is to afford facility for readily changing
the height of the surface of music stools and other seats and retain such surface as
changed. This object I effect by the use of a moveable piece capable of being in-
clined and so held in the position desired to act as a wedge to prevent the descent
of the seat, or in place of a movable piece acting as a wedge an inclined or wedge
formed surface may be employed acted upon by another surface with the like
result. The moving part may be operated by screw or otherwise to bring them
into operation, and a spring or springs may be used to aid the rising of the seat. If
desired there may be repeats of the parts. By these means the height of the seat
may be readily lowered by the sitter whilst sitting on it.
In order to obtain facility for varying the inclination of the seat of harmonium
and organ seats or chairs one edge of such seat is connected to turn on hinge joint,
the other may be operated to vary the height of the back edge by surfaces operating
as described, or I in some cases apply links connected to the back edge of the seat
and of the supporting frame thereof and operated as toggle joints are operated, by a
screw, one end of which bears on or is connected to the parts of the seat or its
frame, so that whilst the front edge of the seat is connected. to its supporting frame
by hinge joints the back edge thereof is variable in height.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Brooks, in the Great Seal Patent Office on the 2nd
May 1877.
HENRY BROOKS, of the Firm of H. Brooks and Company, of No. 31, Cumber-
land Market, Regent's Park, in the County of Middlesex, Pianoforte Action and
Key Manufacturer. "IMPROVEMENTS IN MUSIC STOOLS OR SEATS AND OTHER
SEATS TO FACILITATE EFFECTING VARIATIONS IN THE HEIGHT THEREOF."
The object of one part of the Invention is to afford facility for readily changing
the height of the surface of music stools and other seats and retaining such surface
as changed. This object I effect by the use of a moveable piece or bar capable of
being inclined and so held in the position desired to act as a wedge to prevent the
descent of the seat or in place of a noveable piece acting as a wedge an inclined or
wedge formed surface may be employed acted upon by another surface with the
like result. The moving parts may be operated by screw or otherwis bring
them into operation, and a spring or springs may be used to aid the ris..
seat. If desired there may be repeats of the parts. By these means the height of
the seat may be readily lowered by the sitter whilst sitting on it.
the
In order to obtain facility for varying the inclination of the seat of harmonium
and organ seats or chairs one edge of such seat is connected to turn on hinge joint,
the other may be operated to vary the height of the back edge by surfaces operating
as described, or I in some cases apply links connected to the back edge of the seat
and of the supporting frame thereof operated as toggle joints and by a screw, one
end of which bears on or is connected to the parts of the seat or its frame so that
whilst the front edge of the seat is connected to its supporting frame by hinge
joints the back edge thereof is variable in height.
But that the Invention may be the more fully understood I will by the aid of
the accompanying Drawings proceed to describe means pursued by me in carrying
into offoot
Figure 1 shows a vertical section; Figure 2, an external side view; Figure 3, an
upper side or top view; and Figure 4; an under side view of a music stool with parts
arranged according to my Invention.
Figure 5 shows an upper side view of parts with the seat removed.
Figure 6 shows a vertical sectional view of the same stool but with the seat
raised.
In each of these views the samo letters are employed to indicate corresponding
parts.
a, a, are the legs which are secured at their upper ends in sockets b¹ formed for
them in the casting b; c is the seat the height of which it is desirable to have the
capability for varying to suit the will or requirements of the user; d is the move-
able piece or bar which is capable of being inclined at different angles and there
held to act by its wedge form to prevent the descent of the seat c.
For this purpose
the lower end of the bar d is attached by pin joint d¹ to the arm e¹ of the upright
rod e.
This rod e passes through and is capable of sliding freely in the socket b²
formed for it in the casting b, and at its upper end this rod e is securely held in the
casting which by the ends of its arms f¹¹, is attached to the under side of the
seat c.
The rod d also passes up through an opening formed for it in the casting b
where the outer surface of it bears against a friction roller g and at its upper end
this rod d is acted upon by the end of a screw h which is held with capability of
turning in the casting f, and it has applied to its outer end a handle h¹ by which it
may be turned. To the shaft of this screw h is attached one end of a spiral spring i
the other end of which is connected to the casting f, and the object of this spiral
spring is to give to the screw shaft ha tendency to screw inwards through its

page_text: socket fagainst the upper end of the rod d, so that when the seat c is lifted by
hand the tendency of the screw h is at once by bearing against the upper
end of the rod d to cause that bar & constantly to bear against the roller g and
consequently to be in a position to retain the seat c at the height to which it has
been lifted.
In order to lower the seat it is simply necessary to turn the screw spindle h by its
handle so as to cause the inner end of the screw to move in a direction to recede
from the bar d, when by the bar d following the screw and thereby reducing the
angle of the wedge formed by that bar with the rod e the seat will descend and may
be retained at any height desired by ceasing to turn the screw spindle h. In thus
turning the screw spindle h to release the bar d the spring i will be wound up and
the friction of the parts in contact will operate to retain that screw h from return-
ing, and thus the seat may be retained at any height desired within the range of
the bar & and parts there with used.
If desired for seats of considerable length or area or for other reasons these
operating parts may be repeated. The dotted line c¹ represents a fringe of wood or
other material to hide these operating parts when the seat is raised; Figures 7, 8,
and 9, show the upper side, the under side, and an edge view of the casting f and
parts thereof separately.
In place of the upper end of the bar d being acted upon by the end of a screw as
shown it may be operated for the desired motion by a cam or other inclined surface
the motion of which is aided by spring on the lifting of the seat.
When using an arrangement of the character of that already described for
the purpose of varying the angle of harmonium and organ seats or chairs the
front edge of the seat will be connected to the supporting frame to turn on
hinge joint. Figures 10 and 11 show by sectional side view and back view a
modification of the Invention in which the end of a screw his formed to act
against the inclined or wedge-formed side of a piece j. In this case the piece j
is by its upper end connected to the under side of the seat c, whilst the screw h
is supported in bearings carried by the stationary part and legs a. In this case the
stem of the screw his acted upon by a spiral spring i and is provided with a handle h¹
as in the case just described.
are
Figures 12 and 13 show another modification by which variations in the height
of the back edge of the seat is effected by a screw spindle h with two threads, one
right and the other left handed, acting in collars l, l, which by pin joints 1, 1,
connected to one end of each of the links m, the other ends of one pair of which are
connected by pin joints m¹ to the stationary part of the frame of the seat, whilst
the corresponding ends of the other pair are at m²; connected to the back of
the seat n is a steadying piece hinged at n¹ to the front of the seat, and at n²
it receives the screw / to guide it.
In some cases a single pair of levers may be employed, operated by a screw
placed in a direction across the seat from front to back with a neck at the
front end thereof held to turn in a stationary socket placed in or about a line
with the hinges to the seat. In this case the handle h¹ will be at the back of the
seat.
Having thus described my Invention, and means which I adopt in carrying the
same into effect, I would have it understood that I do not confine myself to the
precise arrangements of parts as shown and described, as the same may be varied
without departing from the peculiar character of my. Invention, but what I do claim
is,-
First. The arranging or combining parts of music stools, or seats, or other seats,
whereby facility is afforded for obtaining variations in the height thereof by the
use of a moveable piece acting with other parts as an adjustable wedge, substantially
as described.
Secondly. I claim the arranging or combining parts for the purpose of facilitating
variations in the inclination of harmonium and organ seats by the use of an inclined
surface, substantially as described.

page_text: And, Thirdly. I claim the arranging or combining parts for obtaining variations in
the inclination of harmonium and organ seats by the use of adjustable supporting
links as described.
In witness whereof, I, the said Henry Brooks, have hereunto set my hand
and seal, this Twenty-eighth day of April, in the year of our Lord One
thousand eight hundred and seventy-seven.
Witness,
ALFRED GEORGE BROOKES,
62, Chancery Lane,
London.
HENRY BROOKS. (L.S.)