Improvements in and connected with Leaf Turners.
Year: 1892

page_text: Date of Application, 18th May, 1892
Complete Specification Left, 18th Feb., 1893-Accepted, 1st Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in and connected with Leaf Turners.
I, FRANCESCO CHILOSI, of 44, Tournay Road, Fulham, in the County of
London, Engineer, do hereby declare the nature of this invention to be as
follows:
:-
This invention relates to improvements in means for turning the leaves of music
or books whereby the necessity for placing the leaves in arms or clips as has
heretofore generally been necessary is avoided.
In carrying out my invention I employ a number of arms or levers connected to
a common spindle and each acted upon by a coiled spring connected at one end to
the spindle and at the other end to its arm. The said spindle is arranged in con-
junction with a ratchet and pawl so that it may be moved to regulate the tension
of the springs. The said arms are all bent to move in the same plane and are of
varying length, that is to say, the arm which is to turn the first leaf is the longest
and the other arms are made successively shorter.
Upon the leaves to be turned I arrange slotted plates the said plates being
adapted to overlap each other in such a manner that the slot of the plate upon
ench leaf projects beyond the plate below it. The free ends of the levers are
provided with hooked or extended portions adapted to respectively engage with'
the slots in the said plates.
With this arrangement it will be understood that when a piece of music or the
like is provided with slotted plates of the kind described it is only necessary when
using the same in conjunction with my leaf turner to place it upon a music stand
in such a manner that the slots in the various plates drop over the bent or extended
ends of their corresponding levers.
In order to successively release the levers I advantageously provide a sliding
bar which engages with the several levers in such a manner that each time the
said bar is raised by means of a pawl actuated from a treadle or push button one
arm will be released thereby allowing the corresponding leaf to be turned under
the action of the spring.
In conjunction with the music stand I preferably arrange a bar or rod which.
bears upon the space between the leaves to be turned and thus prevents the same
from becoming displaced.
DL 101 1
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and connected with Leaf Turners.
I, FRANCESCO CHILOSI, of 44, Tournay Road, Fulham, in the County of
London, 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 improvements in ineans for turning the leaves of
music or books whereby the necessity for placing the leaves in arms or clips as has
heretofore generally been necessary is avoided.
In carrying out my invention I employ a number of arms or levers connected to
a common spindle and each acted upon by a coiled spring connected at one end
to the spindle and at the other end to its arm. The said spindle is arranged in
:
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page_text: conjunction with a ratchet wheel and pawl so that it may be moved to regulate the
tension of the springs. The said arms are all bent to move in the same plane and
are of varying length, that is to say, the arm which is to turn the first leaf is the
longest and the other arms are made successively shorter.
Upon the leaves to be turned I arrange slotted plates or strips, the said plates
being adapted to overlap each other in such a manner that the slot of the plate
upon each leaf projects beyond the plate below it. The free ends of the levers are
provided with extended portions which may be hooked so as to be adapted. to
respectively engage with the slots in the said plates, or the said extended portions.
may bear behind the plates.
With this arrangement it will be understood that when a piece of music or the
like is provided with slotted plates of the kind described it is only necessary when
using the same in conjunction with my leaf-turner to place it upon a music stand
in such a manner that the slots in the various plates engage with the hooked ends
of the levers or allow the extended ends of the levers to pass therethrough as
hereinafter described.
In order to successively release the levers I advantageously provide a sliding-bar
which engages with the several levers in such a manner that each time the said bar
is raised by means of a pawl actuated from a pedal or push-button one arm will
be released, thereby allowing the corresponding leaf to be turned under the action
of the spring.
In conjunction with the leaf-turner I preferably arrange a bar or rod which
bears upon the point where the leaves are connected together and thus prevents the
same from becoming displaced while being turned.
-
To enable my invention to be fully understood I will describe how it can
be carried into practice by reference to the accompanying drawings, in which :-
Figures 1, 2 and 3 are respectively a front elevation, a plan and an end sectional
elevation of a leaf-turner constructed acccording to my invention :
Figures 4 and 5 are similar views to Figures 1 and 2 respectively but with the
casing removed to shew the interior mechanism :
Figures 6, 7 and 8 are respectively a side elevation, a plan and an end elevation
of one of the arms or levers for turning the leaves :
Figures 9 and 10 are respectively an elevation and a plan of the bar or rod for
preventing the leaves being displaced while being turned; and,
Figures 11, 12 and 13 are respectively a front elevation, a plan and a side
elevation of the said bar or rod provided with extensible arms to form a music or
book rest:
Figure 14 is a similar view to Figure 11 but shewing the said arms extended:
Figure 15 is a view of one of the slotted plates; and,
Figures 16 and 17 respectively illustrate two different ways of arranging the said
slotted plates on the leaves to be turned :
Figure 18 is a perspective view illustrating the operation of my leaf-turner.
Similar reference letters indicate similar or corresponding parts throughout the
drawings.
a is the casing of the leaf-turner, and b, b are the arms or levers thereof, one of
the said arms being shewn detached in Figures 6, 7 and 8. The casing a is
advantageously provided with a hinged lid a', whereby the said arms are shut
in when in the position shewn in Figures 4 and 5 in order to render the apparatus
portable.
:
c is the spindle upon which the arms are arranged, and d, d are the coiled
springs connecting the arms with the said spindle, the arms being advantageously
formed with hollow bosses b' to contain the said springs, the said bosses being
arranged one above another. The springs dare advantageously bent at the ends
so as to engage in slits cut in the said bosses 6' and spindles as shewn clearly in
Figures 6 and 7 and are so coiled as to tend to move the arms in the direction
of the arrow, Figure 5. 62, 6ª are pins or projections
on the bosses b' for the purpose
hereinafter described.

page_text: e is the ratchet wheel arranged on the spindle c, and fis the pawl engaging with
the said wheel and carried on the casing a. This ratchet wheel and pawl permit
the tension upon the springs d, d to be regulated by turning the spindle, which is
provided with a square at its upper end for this purpose.
The arms b, b are of different lengths and are connected to their respective bosses
so that they lie behind one another as shewn clearly in Figure 5, the foremost arm
being advantageously provided with a jaw 9 which embraces the other arms and
keeps them all in one plane. In Figure 5 the arms b, b are represented as being in
their normal position, that is to say, the position ready for turning the leaves
of the music or other book. The dotted lines 6 in the said figure represent the
position of the first arm b after having made the turning movement.
h, h are the extended ends of the arms o, b, which ends are formed at right angles
to the said arms, as shewn in Figures 4 and 6. The dotted lines in Figure 8
represent the hooked form of the extensions h, h.
i, Figure 15, represents one of the slotted plates or strips which I connect to the
bottoms of the leaves j, j to be turned, as indicated in two different ways in
Figures 16 and 18 and in Figure 17 respectively, the said plates being extended
along the bottoms of the leaves sufficiently far to ensure the latter being turned
when acted upon by the arms b, b. In Figures 16 and 18 I shew the arrangement
of the plates on the leaves when used in conjunction with the arms b, b having
the extensions h, h only and in Figure 17 the arrangement of the plates when
the extensions are hooked, each of the said Figures 16 and 17 representing two
leaves and connected plates i, i.
As shewn in Figure 18 each of the leaves with the exception of the first leaf
(which has only a stiffening strip at the bottom) is provided with a slotted
plate i, the slots i¹, of the several plates being made successively wider, that is to
say, the slot in the plate i of the second leaf is wide enough to pass the extension h
of the arm for turning the first leaf, the slot in the plate of the third leaf is wide
enough to pass the extension of the arms for turning the first and second leaves,
the slot in the fourth leaf is wide enough to pass the extension of the arms for
turning the first, second and third leaves and so on, the extension of the arm
in each case being against the leaf at one side of the slot as shewn in Figures 16
and 18.
In the modification shewn in Figure 17 the position of the slotted plate i is
reversed from that shewn in Figures 16 and 18, that is to say the slotted portions i¹, i
project below the bottom edges of the leaves to form openings with which the
hooks h', ' can engage, the slotted portion of the plate on each leaf being longer.
than the plate immediately behind it so that the longest arm engages in the slot of
the first leaf, the second arm with the second leaf and so on.
By the employment of the hooks h', h¹ and the arrangement of the plates i. i, as
shewn in Figure 17, any tendency that each leaf may have to rise when turned
quickly by its arm will be prevented by the portion of the plate i forming the lower
part of the slot striking against the hook ¹.
kis the sliding-bar which I advantageously employ for releasing the arms b, b to
turn the leaves, the said bar being provided with teeth k', k' and located in a guide!
in the casing a and in the path of the pins 2, 3 on the bosses of the said arms b, h
so that by raising the said bar k by means of the spring-pawl m each of the
pins 62, can be released in turn and allow the arm connected therewith to swing
round upon the spindle e under the action of its spring. The upward and downward
movements of the bark are limited by the pins A, and respectively, the pin **
working in a slot so as to prevent the lower end of the bar & from moving out of
its guide . The pawl m operated by a cord or its equivalent from a pedal
through the medium of a spring-lever to one end of which the said pawl is jointed.
Or the lever o can be directly operated by hand through the medium of a push-
button. In order that after the arms, have been released they may be again
maintained in their normal position (into which position they must be moved by
hand) I provide for releasing the bar k so that it may be moved down into its
"

page_text: normal position, and for this purpose I connect to the pawl m a push-button p
whereby the said pawl can be moved out of engagement with the teeth of the
.bar k.
., Figures 9 and 10, is the bar or rod which I preferably arrange in conjunction
with my leaf-turner, which rod bears upon the point where the leaves are stitched
or otherwise connected together and thus prevents the same from becoming displaced
while being turned. The said rod is caused to bear with pressure upon the said
leaves by means of a metallic strip placed behind it and connected to it at its
lower end.
When my leaf-turner is used in connection with a piano, organ or the like, (in
which case it is advantageously connected thereto) I prefer to hinge the rod g to it
as shewn by the dotted lines in Figures 1 and 2 so that it may be turned down out
of the way when required, but when the leaf-turner is to be portable so that it may
be carried in the pocket and fixed to a music stand or other book-rest as desired,
I preferably form the rod 9 separate as shewn in Figures 11 and 13 so that it can
be placed and carried inside the casing a, as shewn by the dotted lines in Figure 1,
a hole q¹ being formed in the casing to receive one end of it. In this case I form
the said rod with a tongues and I provide the casing a with a hole t to receive the
said tongue, whereby the rod g can be placed and maintained in position for use.
As also shewn in Figures 11 to 14 I sometimes provide the rod q with jointed
extensible arms u which serve as a music or book-rest.
For fixing my leaf-turner to a music stand or other book-rest I advantageously
provide a plate of the shape shewn in Figures 1 and 3, one end of which is
adapted to enter a hole or socket w in the casing a while the other end is provided
with a hole to receive a thumb-screw a by which it can be fixed through the medium
of a nut y to the music stand or the like z Figure 3..
.
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 an apparatus for turning over the leaves of music or books the combination
of a vertical spindle c, ratchet-wheel e and pawl f, together with a bar k operated
by a lever o and pawl m, substantially as described and illustrated in the
.accompanying drawings.
2. The use in combination with an apparatus such as that herein before described
of metallic strips i fixed to the leaves of music or books, substantially as described
and for the purpose specified.
3. The improvements in and connected with leaf-turners hereinbefore described
and illustrated in the accompanying drawings.
Dated the 18th day of February 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.