Improvements in and appertaining to Mechanical Musical Instruments.
Year: 1892

page_text: Date of Application, 28th June, 1892-Accepted, 20th Aug., 1892
COMPLETE SPECIFICATION.
Improvements in and appertaining to Mechanical Musical
Instruments.
I, FERDINAND PIETSCHMANN of 28 Brunnenstrasse, Berlin N. in the Empire
of Germany, 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 invention relates to improvements in and connected with the so-called
automatic or mechanically played musical instruments, the said improvements have
reference to various parts and devices of a mechanical musical instrument, and the
object of my invention is that, by adopting the said improvements separately or
severally, musical instruments of a superior quality may be obtained.
The improvements of my invention have reference, first, to an improved con-
struction of the travelling music sheet, and this part of my invention consists,
firstly, in providing a music sheet forming an endless metal-band composed of links
jointed in a flexible and collapsible manner, without any objectionable spaces
between the several links of the band or projecting parts, such as hinges, rivets and
the like, which impair the smooth travelling motion of the band. And, secondly,
my invention relates to music sheets which carry on their surface projections
instead of perforations, said projections I stamp out of the metal in such a manner
that the base line or lines of the projecting pins or tacks of metal extend in the
direction of the travelling path of the sheet, which renders the said projections not
so liable to be bent or broken as is the case with the projections of the metal sheets
hitherto employed.
Another feature of my invention has reference to improvements in the box or
casing of the musical instrument, the improved construction having for its object
the providing of suitable guides for the travelling music sheet and also to facilitate
the putting on and off of the endless band to and from the casing.
This invention also relates to the mechanism for striking the metal reeds, and
consists in improved means for shifting the striker in such a manner that, during
its throw in one direction, (say the upward throw) it strikes and vibrates the reed,
while, during its throw in the opposite direction, it freely slides past the said
reed.
Another feature of my invention has reference to a simple and effective device
for deflecting or temporarily making inoperative the push-point levers and reed-
striking levers, for the purpose of preventing the music sheet from being torn by
the push point levers during the operation of exchanging the music sheet.
Another improvement relates to an improved regulator for regulating the speed
of the driving mechanism of mechanical musical instruments, the said regulator
tending to establish an equal speed from the beginning up to the end of the tune or
tunes, independently of the number of reeds which are struck at a time.
And, finally, my invention has reference to improved means for damping the
reeds before they are struck or vibrated.
Referring to the accompanying drawings:
Figures 1, 2, 3, 4 and 5 illustrate an improved sheet-metal music sheet,
Figure 1 being a plan of the same with the upper metal-plate removed;
Figure 2 is a plan, of the upper metal-plate, separately;
Figure 3 is a plan of two links or jointed portions of the band, before being
perforated;
and
Figure 4 is a plan of a series of links jointed together, after being perforated,
Figure 5 is a plan and cross section of a modified construction of a link of the
music-sheet.

page_text: The endless music-sheet is composed of a series of links or equal portions jointed
to each other by flexible strips of a suitable material, such as woven material of
sufficient strength to prevent breaking, or of parchment, leather or the like.
Eack link of the music-sheet consists of a metal-plate a, perfectly smooth on its
outside surface and presenting no projecting parts of any kind which could interfere
with the continuous travelling motion of the sheet.
u.
The upper or inside surface of said plate a is preferably made rough or suitably
prepared for the better adhesion of glue or a cement or other binding substance by
which a sheet,, of paper or fabrics is secured to the plate
The joint of every
two adjacent plates à is formed by a strip, of a suitable flexible material, such as
linen or other fabrics, parchment or thin leather, said strip overlapping the ends of
the two adjacent plates a, and being secured thereto by a suitable gluten or cement.
The sheet has preferably the same thickness as the strip c. On to the said
sheet b, and strip e, another metal plate d, of exactly the same size as the plate a,
laid and secured by a suitable gluten or cement, and I prefer to still better secure
the ends of each plated to the flexible stripe by indentations or impressions, as
shown in Figures 3, 4 and 5, which impressions, however, are provided only on one
surface of the music sheet, the other, lower surface remaining perfectly plain and
smooth.
is
Figure 4 represents a series of links of the endless band constructed as described
and perforated to form the tune to be played. The joints of the several links have
no projecting parts and possess a superior flexibility by the supple strips c secured
inside of the two plates a and d.
a
Instead of glueing or cementing the two plates a and to each other, 1 prefer, in
some cases, to secure the said plates to each other by folding the edges of one plate a
over the edges of the other plate d, as shown in Figure 5. In this case, the plate
is made wider than the other plate d, so as to overlap the smaller plate, as shown.
By this means, I prevent the links of the music sheet from splitting, which might
happen with the links consisting of two plates glued to each other, if the glue
becomes soft or brittle..
Instead of forming the links or jointed portions of the music sheet of two metal
plates laid one over another, as described, a still more convenient mode of forming
said links may be adopted by making the said links or jointed portions each of a
single plate of sheet metal, such as a, the adjacent sides of every two plates being
jointed by overlapping strips, such as c, as before described. And the two sides of
the said metal plate, or one side only, may be lined with paper, parchment or a
suitable woven or other material, the lining being attached by a suitable glue,
cement or other binding material. This mode of forming the music sheet is prefer-
able, not only on account of its greater simplicity, but it also allows of covering the
surface or surfaces of the sheet with printed notes or inscriptions, and, further, the
metal is better guarded against oxidation.
Figures 6, 7, 8, 9, 10, 11, 12 and 13 serve to illustrate the improved music-sheet
with pins or projections from the surface of the sheet stamped out of the metal
forming the same.
In metal sheets of this kind hitherto in use, the pins or projections stamped from
the metal and bent to project from the surface of the same are so arranged that
their base or edge, which connects the projection with the metal of the sheet,
extends across or at right angles to the line of motion of the sheet. Such pro-
jections are liable to be bent or broken owing to the resistance of the points or pins
against which the said projections strike when the instrument is being operated.
To prevent bending and breaking, the projections have been strengthened in various
ways, but, though the durability has been thereby increased, the bending and
breaking have not been entirely obviated.
According to the present improvement, the projections pressed or formed from
the metal of the music-sheet are so arranged that their base-line or lines, by which
they are connected with the material, extend longitudinally in the direction of the
line of motion of the sheet.

page_text: Figure 6 is a side elevation of a music-sheet f, having projections or pinse.
which, as the music-sheet travels, strike against the teeth or pins of a disc or
sheave, which thereby is caused to rotate and strikes and vibrates the metal
reedy by one of its teeth, as known and used in musical instruments of the
kind. Any other device for striking the metal reeds may be used instead of the
wheel g.
Figure 7 is a side view of the music-sheet, and
Figure 8 a plan of the same.
Figure 9 is a cross section drawn on lines of Figures 8 and 10.
2.
<
In this modification, the pins or projections e are of triangular shape, bent to
take an inclined position, as clearly shown in Figure 9. The base line of each pin e
extends in the direction of motion of the sheet, and the teeth or pins of the wheel I
are struck by the front edge of the triangular projections. If the said pins or
projections e were bent to take a vertical position, their bearing surface against the
teeth or pins of the wheel, g, would be limited to the thickness of the sheet-metal,
and, consequently, the said pins e could easily slide past said narrow teeth or pins
without striking the same. The inclined position of the pins e, therefore, is of
particular importance, because the full width of the front edge of the pins e offers a
bearing or striking surface against the said teeth or pins of wheel g.
It will be easily understood that, as the base-line of each pine extends in the
direction of motion, the said pins or projections e are not liable to be broken.
I prefer the triangular shape of the pins .e, because it offers the advantage of
arranging the lines or staves closely up to each other; but I do not limit my inven-
tion to the triangular shape of the said pins. Rectangular pins, as shown in
Figures 10 and 11, or other suitable shapes, might as well be used, the inclined
position, as shown in Figure 9, being essential with any of these shapes.
Another modification of the projections is illustrated by Figures 12 and 13,
Figure 12 being a longitudinal section, and Figure 13 a plan of the music-sheet.
In this modification, the projections e form a kind of bridge projecting from the
plane of the music sheet, the strip of metal pressed or stamped from the sheet is
connected with the sheet at two ends, instead of at one end only. The two base
lines of each pin e extend in the longitudinal direction of the staves of the music
sheet, and the said bridges or projections e strike against the teeth or points of
wheel with their front edge. The shape of the bridge e may be vaulted, as shown
in Figure 12, or it may be angular. Projections of this kind will be much stronger,
and breaking will be rendered nearly impossible in the course of normal use.
Another feature of my invention is illustrated by Figures 14 and 15, Figure 14
being a plan and Figure 15 a longitudinal section of a top-plate of the casing or
box in which the working mechanism of the instrument is enclosed.
case.
The said top plate consists of sheet-metal, or it might be cast, pressed or
formed of other suitable material. The novelty consists in forming the guides
or ledges integral with the top plate instead of securing the said ledges to
the plate by glueing, riveting, screwing or the like, as has hitherto been the
The guides k, between which the music-sheet is travelling and bound to
follow a straight direction, must be exactly parallel to each other, and, if they
are secured to the casing by glue, rivets, screws or the like, the said guides
are liable to be moved out of their straight parallel direction. With the guides k
made integral with the top-plate, it will be impossible, and the music-sheet will
always be properly guided to present its perforations exactly above the series
of slots i, through which the push-points, or similar devices for transmitting the
tune, are projecting.
By pressing or casting or otherwise forming the ledges & integral with the top-
plate, ornamental designs may easily be formed on the same, as also on the
material of the plate / itself.
Another feature of my invention has reference to improved means of mounting an
endless music-sheet on to the casing .or box of a mechanical musical instrument,
particularly a music-box, and it consists in mounting the box on rollers or wheels, in

page_text: order to roll the same into the open endless. band. Considerable difficulty has
been heretofore experienced in using endless music-sheets with heavy music-boxes,
because, for mounting the music-sheet, the box.had to be lifted on one side in order
to pass the music-sheet below and over it. The same difficulty exists in removing
the music sheet from the box.
By the improvement of my invention, the endless music-sheet is not moved on to
the box, but held stationary with its lower surface resting on the table or support,
and the box, being mounted on wheels or rollers, is rolled towards the open sheet
and into it without either lifting or tilting the box.
This part of my invention is illustrated by Figures 16, 17 and 18; Figure 16
being a side elevation of the casing of a music-box, with the endless sheet passed on
shown in section Figure 17 is an underneath view, and Figure 18 an end elevation
of the same.
Within the rests m, which support the casing 1, I provide small wheels or rollers n.
each turning on an axis the said wheels or rollers n need only project from the
foot m by about one eighth of an inch. The outside edge mi of the foot mis
preferably rounded off on one side of the casing. The endless music-sheet is held
open with its lower surface resting on the table or support, and, by rolling the box /
towards the open sheet, the said box will slide into the sheet, the rounded edges m¹
facilitating its passing in freely.
The music-sheet, travelling in the direction across the box when played, would
slide with its lower surface on the table and thereby produce a noise, which, in some
cases, would drown the music, or, at all events, be very objectionable. To avoid
such noise, I provide, below the casing 7, a suitable guide o, consisting preferably of
a wire bent as shown, and having, at its forward part, à tongue o' formed or secured
to it, said tongue being slightly bent down to touch the table. Now, as the box is
rolled into the endless music-sheet, the said tongue o', after the wheels or rollers
have passed over the edge of the band, will be below the said band and guide the
same until it rests on the wire-guide o. The wire or other material of the said
guide o may be covered with any suitable soft material, and, while the said guide
prevents the music-sheet from sliding on the table, the sliding contact between the
said guide o and travelling music-sheet will be almost or entirely noiseless.
0
Another feature of my invention has reference to improved means for striking the
steel-reeds, as also for applying a damper to the same at the proper time.
Figures 19 and 20 illustrate two modifications of an improved device for striking
or vibrating the metal reeds.
According to Figure 19, the push-point-levers are arranged to turn on a common
shaft t, carried by the block or support u, a spring tending to force the push-point
of said levers t up against the travelling music sheet. At the other end of said
lever another lever is arranged to slide within overlapping or other suitable
guide-ways of the lever t. The lever has a finger or striker to strike or
vibrate the free end of the metal reed y, and a projecting arm w², carrying a
damper, which, when applied to the reed, causes the sound to cease. To the said
lever there are further formed two projecting arms w³, which, as the levers and w
are swinging on the shaft are alternately made to strike against the stay or
ledge u whereby the lever is moved forward and backward in its guides t² along
the lever t. When the lever is shifted back, during the descent, the striker
will freely pass by the end of the reed y, but when the said lever w is shifted forward
(during the upward stroke) the striker catches the reed y and vibrates the same
to produce the sound. The damper z is applied to the reed by a spring v pressing
on the lever arm c².
Instead of forming two arms w³ on the lever w, one arm w' as shown in Figure 20,
will be found sufficient, said arm being arranged to swing within a hollow stay
or block against the sides of which the said arm e alternately strikes, as the
push-point-lever t is thrown up or forced down. The two levers and in this
case, are mounted on a common shaft and the lever whas a longitudinal slot to
allow of its being shifted forward and backward alongside the lever for the purpose

page_text: afore described. The spring has an upward pressure against a projecting part of
lever w and the two levers t and to have the same movements up and down.
Figures 21 and 22 are detail views of the two levers and to combined.
The mechanism for making all the push-point and striking levers t and to
temporarily inoperative, while a new music sheet is being put on, is shown in one
modification in Figures 23 and 24, Figure 23 being an end view and Figure 24 a side
view of the device.
The striking levere has formed on it a downwardly projecting arm ending in a
hook w. A lever A is arranged to turn on its pivot A' in the block or otherwise,
said lever having an arm A² extending across and below the whole series of striking
levers .
When the said lever A is turned to the left, Figure 24, its arm A² will
engage with the hooks of the striking levers we of the series and force the said
striking levers back, upon which the push-points of the set of levers are equally
pulled down by the said arm A² and hooks w. The fingers of the levers to
during the upward stroke of the latter, will freely pass by the reeds, as the levers wc,
had been pulled back before the lift. When the lever A. is released, a spring A³
will return the same into its normal position and the set of levers t and ware
returned to their normal position shown in Figure 24 by the pressure of the
springs e
Another modification of the device for temporarily locking the push-point-levers
in a lowered position is illustrated by Figures 25, 26 and 27, Figure 25 being a
perspective view of the device (only one push-point and striking lever of the series
being shown) Figure 26 is a side view representing the normal position of parts
and Figure 27 a side view showing the levers and locked in their lowered
inoperative position.
On the shaft of the series of levers t, a crank B is pivotally mounted, said
crank B having, on one side, a leg B extending into a slot B2 of the base plate P.
The said crank B normally keeps the position shown in Figure 26, the pivoted
crank dropping by gravity. A cam C mounted on a pin or shaft D is arranged to
bear against the said leg B' of crank B when the shaft D is being turned in its
socket provided in the plate P. In the normal position of said shaft D, the cam C
has no bearing against the leg B' of crank B, but when the said pin or shaft Dis
caused to make a quarter of a turn, the cam will work against the leg B' and lift
the crank B into the position shown in Figure 27. The back of said crank B, while
being raised, engages within a recess or shoulder w formed in the lower edge of the
sliding striking levers w, and forces the set of said levers away from the ends of
the set of reeds y. Now as the crank B is raised further up and the push-point-
levers are correspondingly lowered, the strikers of levers freely pass the
reeds without striking the same. The levers and t are locked in their position
as shown in Figure 27 as long as the cain C continues to bear against the leg B' of
crank B.
The shaft or pin D may preferably be provided with a thumb-rest D' which
extends through a corresponding slit of the abutment stay of the music sheet (not
shown in the drawings). While the said shaft D keeps its normal position, the
thumb-rest D is at right angles to the slit of the stay through which it extends,
and thereby keeps the said stay locked in its working position upon the travelling
music sheet. Now, when the music sheet is desired to be exchanged, the said
abuitment-stay must be raised, and for raising the same the thumb-rest 1' of shaft D,
keeping the stay in the locked position, must be released and caused to make a
quarter of a turn, to place the thumb-rest parallel to the slit within which it is
engaged. While turning the said thumb-rest, the cam C, mounted on shaft D, will
raise the crank B and make the push-point and striking levers inoperative as
described. By this means when the music sheet is being removed, all the push-point
and striking levers are temporarily made inoperative by the mere fact of releasing
the abutment stay of the music sheet and without requiring any particular attention.
The damage frequently done to the music sheet by the said lever while exchanging
the sheet is thereby entirely prevented.

page_text: Another feature of my invention has reference to the dampers for causing the
metal reeds to cease their vibrations at the proper time, that is, before being
vibrated again.
Figures 28, 29, 30 and 31 illustrate one improved construction of a damper.
The damper E, in this case, consists of a piece of rubber or similar elastic
material carried in a position which allows of a freely swinging motion to its head
or point which alone makes contact with the reed, whereby the vibrating damper E
is enabled to follow the vibrations of the reed. I thereby obtain not only a
complete but also a soft and noiseless action of the dampers.
The mode of securing the elastic pointed damper E may be varied. In Figures 28
and 29, the damper E is directly carried by a suitable sleeve or socket or clamp
of the push-point lever t. The striking lever or striking device controlled by the
push-point-lever is not shown in these figures, as the said device for striking the
reeds may be arranged in a variety of manners. Figure 28 represents the damper E
and reedy in a state of rest. Figure 29 shows both the damper and. reed
vibrating.
"
A
In Figure 30 the damper E is shown attached to a separate lever F hinged to a
supporting block Gas at F. This arrangement is preferable where the reeds y
are struck by the pins of a rotating barrel in this case the pins strike the reed
and simultaneously raise the lever F, lifting the damper E out of contact with the
reed. When the said lever F then slides off the pin which had raised the same,
the lever falls down and the damper causes the vibrations of the reed to cease.
bolster or cushion G¹ may suitably be arranged below the lever F, said cushion
-causing the lever F to vibrate as it falls down, and as the vibrations of the lever F
and those of the reed y will meet, the point of damper E comes into immediate,
soft and elastic contact with the reed y, and the said reeds are immediately and
noiselessly silenced. *.
+
.
The damper E may also be secured to a spring as shown in Figure 31, by which
à double elasticity is obtained."
Another construction of a damper mechanism for the metal-reeds is illustrated
by Figures 32, 33, 34, 35, 36 and 37.
To silence the metal reeds y, Hat metal springs H are arranged to bear against
the narrow front ends of the said reeds. Figure 32.is a longitudinal section of the
mechanism, the damper-spring H being shown in the position where contact is
being made with the reedy, the spring H being forced against the front edge of
the reed by the pressure of the. teeth of wheel or by the pins of a barrel.
Figure 33 is a sectional end elevation, Figure 34 is a plan, and Figure 35 a
longitudinal section of the device, the reedy being on the point of being struck or
vibrated by a tooth of the wheel or pin of a barrel. Figures 36 and 37 represent
two modifications of the damper spring H.
By means of this damper-mechanism, the damper springs H are forced into
contact with the front edge of the metal reeds by the pressure of the tooth of
wheel or pin of a barrel, which, in its rotation, is on the point of striking the
reed. The said tooth or pin before reaching the reed, has a sliding contact with
the spring H, deflecting the same by a slight pressure to such an extent as to bring
its upper end into contact with the reed, which, accordingly, ceases to vibrate.
When the sliding contact of the tooth or pin against spring H is released, the
said spring returns by its own clasticity and the reed y is left in a state of rest.
The tooth of wheel g or pin of barrel, after leaving the spring H, strikes the reed
and produces the sound. In order to enable the said tooth or pin to, first, deflect
the spring H and then strike the reed, I provide the said spring with a recess
or slot H at or near the upper end. The tooth or pin, having deflected the spring
by bearing against its lower portion, enters into the said recess or slot H' and comes
free of the spring.
The reeds are secured on a bridge or support I on the plate P: to the lower
side of said plate P, a ledge or bar P, is secured, to which the springs H are screwed
or suitably fastened, extending upward through a slot P² of the said plate P. The

page_text: free or upper ends of said springs H, in their normal position, are kept at a.
slight distance from the front ends of the reeds y and return into the said normal
position by their own elasticity, when the tooth or pin, after deflecting the spring,
has entered into the recess or slot H', thus permitting the said tooth or pin to-
vibrate the reed.
And, finally, my invention relates to an improved speed-regulator or governor
for the driving mechanism of a mechanical musical instrument.
The speed of the driving mechanism, according to this part of my invention, is
kept constant independently of the number of reeds struck or vibrated at a time
and from the beginning of the tune to the end of the same.
Figure 38 is a side elevation of the improved speed regulator shown in a state of
rest, and
Figure 39 is a corresponding view shown in a state of rotation.
K is a frame or bracket combined with the driving mechanism by any suitable
means; within bearings of said frame a shaft L is caused to rotate, friction
being reduced as much as possible. To the said shaft L two or more springs M
are secured, each spring having one or more turns wound as at N. The free end
of said springs M is turned upward parallel to the shaft L and carries a fan O,.
the size of which may vary according to the driving power of the instrument..
Rotary motion is imparted to said shaft by the driving mechanism through suitable
gearing or other means.
Proportional to the speed of rotation of the shaft L, the fans O will rotate at a
greater or less distance from the shaft, the distance increasing and diminishing
with the speed. If but few reeds are struck, the distance of the fans from the
shaft will be less than if many reeds are vibrated. If, towards the end, the power
of the driving mechanism is decreasing, the fans O will move closer together and
the speed will be kept at a uniform rate during the whole of the tune.
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. For use in mechanical musical instruments, an endless music-sheet, the links
or jointed portions of which are composed each of two plates of sheet metal secured
one upon another by a suitable binding substance, such as glue or cement, with or
without an intermediate sheet of paper, fabrics or other material, or by folding the
overlapping sides of one plate over the edges of the other, the two adjacent sides.
of every two links or lengths being jointed by an overlapping flexible strip,
substantially as and for the purpose set forth.
2. For use in mechanical musical instruments, an endless music-sheet, the links
or jointed portions of which are composed each of a single plate of sheet metal
lined on one or both faces with paper, parchment, fabrics or other suitable material,
the two adjacent sides of every two links being jointed by overlapping, flexible
strips, substantially as and for the purpose set forth.
3. For use in mechanical musical instruments, a music-sheet-of sheet metal
having pins pressed from the metal and projecting from the surface of the same,
said pins being so formed that their base line extends longitudinally in direction of
motion of the sheet, the forward edge of said pins or projections taking an
inclined position towards the surface of the sheet, substantially as and for the
purpose set forth.
4. For use in mechanical musical instruments, a music-sheet of sheet metal
having parts pressed from the metal and projecting from the surface of the same,
said parts or projections being formed in the shape of a bridge or eye with the
two base lines extending longitudinally in direction of motion of the sheet, substan-
tially as and for the purpose set forth.
5. In a mechanical musical instrument, a top-plate or cover of the casing,
having ledges or guide-bars for guiding the music-sheet formed in one with the
material of the top-plate, substantially as and for the purpose set forth.

page_text: +
6. In a mechanical musical instrument, the mechanism for striking the reeds,
consisting in the combination, with two levers arranged to slide one alongside the
other, of two projecting arms formed in one or secured to the striking-lever and a
stay extending between said arms for shifting the lever, substantially as described.
7. In a mechanical musical instrument, the mechanism for striking the reeds,
consisting in the combination, with two levers arranged to slide one alongside the
other, of one projecting arm formed in one or secured to the striking lever, and a
hollow stay within which the said arm is arranged to swing for shifting the lever,
substantially as set forth.
8. In a mechanical musical instrument, a mechanism for temporarily making the
striking levers inoperative, consisting in the combination, with the striking and
push-point levers, of an arm extending downward and having a hook-shaped end, a
lever engaging with the said hooks, and a spring for returning said lever, substan-
tially as and for the purpose set forth.
9. In a mechanical musical instrument, the mechanism for temporarily locking
or making inoperative the push-point and striking levers, consisting in the com-
bination, with the striking and push-point levers, of a crank pivoted to the axis of
said levers, a stem in the base-plate, a thumb-piece for rotating said stem, a cam
secured to the said stem, and an arm or leg extending from the said crank and
controlled by the said cam, substantially as and for the purpose set forth.
10. In a mechanical musical instrument, the combination, with a set of reeds, of
a damper provided for each reed, said damper consisting of elastic material, such
as rubber, vibrating by its own elasticity or secured to an elastic spring, for
damping the reed by touching it only with a point, substantially as set forth.
11. In a mechanical musical instrument, the combination, with a set of reeds,
of a damper provided for each reed, said damper consisting of an elastic spring
having a recess or slot at or near the upper end, said spring being forced into
contact with the front end of the reed by the tooth of a striking wheel or pin
of a barrel before. the said tooth or pin strikes the reed, substantially as and
for the purpose set forth.
12. In a mechanical musical instrument, a speed-regulator for the driving
mechanism, consisting of a shaft receiving motion from the said driving mechanism,
two or more springs secured to said shaft, each spring having one or more turns
and carrying a fan, substantially as and for the purpose set forth.
13. In a mechanical musical instrument, the casing of the instrument mounted
on rollers or wheels, in combination with a guide or support for the travelling
music-sheet arranged below the casing, substantially as and for the purpose set
forth.
Dated this 27th day of Tune 1900
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.