Improvements in Book Holders for Pianoforte Music Desks or other Desks.
Year: 1890

page_text: Date of Application, 15th Sept., 1890
Complete Specification Left, 12th June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Book Holders for Pianoforte Music Desks or
other Desks.
ARCHIBALD BEATON 13 Ship Street, Brighton in the County of Sussex,
Pianoforte Maker do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in book holders for pianoforte music desks
& other desks, the object of which is to facilitate the operation of turning over the
leaves of music or other matter supported upon the desk.
I connect each holder to its support with a spring, which holds it in the upright
acting position, but is sufficiently tight to enable the motion of the turning leaf to
deflect the holder out of the way; the holder returning to the upright position,
after the turning leaf has passed it, so as to be in position for retaining the
remaining leaves. The motion of the holders under the action of the springs is in
the same direction, as in the case of the ordinary holders moved by hand.
When it is desired to close the pianoforte, or other instrument, to which the desk
may be attached, the supporting screws or bearings, to which the springs of the
holders are connected, may be turned either way through the required angle,
carrying with them the holders into the desired position.
Dated this Thirteenth day of September 1890.
COMPLETE SPECIFICATION.
Improvements in Bookholders for Pianoforte Music Desks or
other Desks.
I, ARCHIBALD BEATON of 13 Ship Street Brighton in the County of Sussex
Pianoforte Maker 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 invention relates to improvements in bookholders for pianoforte music desks
& other desks, the object of which is to facilitate the operation of turning over the
leaves of music or other matter supported upon the desk. I connect each holder to
its support with two springs which hold it in the upright acting position but are
sufficiently strong to enable the motion of the turning leaf to deflect the holder out
of the way, the holder returning to the upright position after the turning leaf has
passed it, so as to be in position for retaining the remaining leaves.
The motion of the holder under the action of the springs is in the same direction
as in the case of the ordinary holders moved by hand. When it is desired to close
the pianoforte or other instrument to which the desk may be attached the supporting
bearings to which the springs of the holders are connected may be turned either
way through the required angle carrying with them the holders into the desired
position.
In the accompanying sheet of drawings
Fig. 1. is a full size elevation of a front edge of an ordinary music desk ledge
showing my invention applied thereto.
Fig. 2. is a full size section through X. Y.
Fig. 3. is a full size elevation of pivot or pin C.
Fig. 4. gives full size elevations of the two springs G. G.
T
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page_text: Fig. 6. is a full size elevation of the front of my invention showing the arm
fixed to the left so that the instrument to which the desk is attached may be
closed.
Similar letters refer to similar parts throughout the drawings.
B. is the front edge and shaped end of the ledge of an ordinary music desk and
A my improved arm affixed thereto-this arm turns upon a pivot or pin C. see
Figs. 2 and 3 and is actuated by two light springs G. G. see Figs. 2 and 4. these
springs work one against the other and are of such a pattern that they may be
slipped on to the square shoulder of pin C at C2 Fig. 3. and held firmly in position-
they are enclosed in a small circular box K. attached to the arm A with a moveable
lid L for ready access to them.
The action of the arm A is as follows:-
The slightest pressure will turn it down to the left or right as indicated by the
dotted lines in Fig. 1 and on the release of the pressure the springs G. G.
immediately return the arm to the vertical position.
D is a light spring coiled on the circular portion of the pin or pivot C. at V
Fig. 3 one end of which bears against the shoulder in plate H Fig. 2 and the other
end against the washer E. Figs. and 3 which is kept in position by the small
pin F. Figs. 2 and 3. The portion of the pivot C. taking the light coiled spring D,
the washer E and pin F are let into the ledge of music desk as shown in
Fig. 2. and are out of sight when the plate His fixed to the front edge of
ledge.
The action of the coiled spring D is as follows:-
arm A
:―
The pin or pivot C. being drawn forward by means of its milled head W the
spring is compressed so that the square shoulder R on the pin-see Fig. 3. is drawn
out of the square mortice S in plate H. see Fig. 5-when the pin C. with the
may be turned to the left or right when not in use as indicated by the dotted
lines in Fig. 1 and as shown in Fig. 6 (the circular portion of the pin C easily
working round in the square hole or mortice in plate H-see Fig. 5) and set in
either position on the release of the milled head W when the spring D draws the
square shoulder R back into the mortice S.
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 :-
An arm A on a pivot C and actuated by two springs G. G. enclosed in a box K
attached to the arm A. for affixing to a music or reading desk ledge so that the arm
will be depressed by the turning of the leaves to the left or right and will auto-
matically return to the vertical position substantially as described-also a pivot C
with a square shoulder working in a mortice S with the help of spring D may be
drawn out, turned and set to the left or right-see Fig. 6-when it is advisable to
close the instrument to which the music desk is fixed.
Dated this 10th day of June 189:
ARCHIBALD BEATON,
13, Ship Street, Brighton.