IMPROVEMENTS IN APPARATUS FOR AUTOMATICALLY OR MECHANICALLY PLAYING PIANO-FORTES, ORGANS OR SIMILAR MUSICAL INSTRUMENTS A com
Year: 1882

page_text: LETTERS PATENT to William Robert Lake of the firm of Haseltine Lake
"
& Co Patent Agents, Southampton Buildings, London, for an invention of
"IMPROVEMENTS IN APPARATUS FOR AUTOMATICALLY OR MECHANICALLY
PLAYING PIANO-FORTES, ORGANS OR SIMILAR MUSICAL INSTRUMENTS
A com-
munication from abroad by Francis Eugene Moore, of Boston Massachusetts,
United States of America:
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 5th April 1882.
WILLIAM ROBERT LAKE of the firm of Haseltine Lake & Co Patent Agents
Southampton Buildings, London "IMPROVEMENTS IN APPARATUS FOR AUTO-
MATICALLY
OR MECHANICALLY PLAYING PIANO-FORTES, ORGANS, OR SIMILAR
"
MUSICAL INSTRUMENTS [A communication from abroad by Francis Eugene
Moore, of Boston Massachusetts, United States of America.]
This invention relates to attachments for musical instruments having a
key-board, the said attachments being, adapted to be readily secured to, or removed
from, the said key-board and constructed and arranged to mechanically strike the
keys of the instrument and thereby sound the notes or tones thereof in an order
or succession corresponding to perforations in parallel rows in a music-sheet, which
is caused to travel in proper relation to the operating mechanism of the
attachment.
According to the said invention the attachment consists essentially of a series
of spring-actuated hammer-levers, each adapted to vibrate and to strike one of
the keys of the musical instrument; of a series of jack-levers, one for each
spring-actuated lever; of a music-sheet having perforations in rows and of
varying lengths arranged to represent the different notes of a tune; and of
mechanism for feeding the said music sheet; all arranged in such a manner as to
secure the striking of the keys in succession mechanically in accordance with the
perforations of the music-sheet as the said perforations pass the jack-levers as

page_text: herein after described. In addition to the above the said invention consists of
combinations and arrangements of mechanism hereinafter described.
In carrying the said invention into practice I provide a main case composed of
vertical end pieces, a horizontal top or platform, and a supplementary casing,
surmounting the said platform and attached to it in any suitable manner but so
as to leave an open slot at its front and rear sides just above the said
platform.
:
The case and supplementary casing carry within them the working parts of the
attachment, and the main case has at each end piece a hook or lug; each of the
hooks is adapted to be engaged with, and disengaged from, a recess in a stationary
block at each end of the key-board of a musical instrument, such as an organ,
melodeon, or piano forte for which the attachment is to be used, as a means for
securing an automatic operation of the keys from the travel of, and in accordance
with, the perforations of a music-sheet of paper or of other suitable material in
proper relation to the operative mechanism of the attachment.
The main case, when its hooks are engaged with the recesses in the said blocks,
rests by the lower edge of each of its end pieces upon a suitable block fixed at
each end of the key-board, which blocks may be in one piece with the aforesaid
blocks or separate therefrom; but situated in such relation thereto as to secure a
rest, and consequently a support for the main case when the said hooks are engaged
with the recesses. The music-sheet is made of card-board, paper, cloth, or other
suitable flexible material, and has cut in it, a series of parallel and equidistant
rows of perforations, which perforations are of lengths and of a relativo
arrangement to represent the different notes of a tune or of a chord or of any
other arrangement of musical tunes,
The music-sheet may be of any desired length, but for its proper guidance
through the attachment it preferably should have a width equal to the distance
between the two parallel end standards which project above the aforesaid
platform.
The music-sheet travels over the said platform in and between the said standards
which act as guides for it, and its travel is secured by means of a horizontal
feed-roller arranged to turn, at each end, in bearings in the said standards and by
means of flanges to closely press the music sheet to the upper surface of the said
platform at and between a series of holes in it. These holes are at equal distances
apart and they severally correspond in position to the rows of perforations in the
music-sheet, and the feed-roller has in corresponding lines therewith a series of
parallel peripheral grooves each of an equal depth sufficient to admit of the desired
projection of levers or jacks through the said perforations of the music sheet, into
the said grooves.
.
The said feed roller, between its peripheral grooves, that is, at its flanges or
portions which bear upon the music-sheet, is covered with india-rubber, or other
yielding or elastic material and preferably one, such as india-rubber, which will
secure a friction and hold upon the music-sheet to ensure its feed or travel over
the platform, as the feed-roller is turned. Two gear wheels of different diameters
are secured to a journal at one end of the said feed-roller; the inner gear-wheel is
of a larger diameter than the outer gear-wheel, and the two are separated from
each other-A horizontal shaft is located below the aforesaid platform and is
arranged to turn at each end in suitable bearing blocks in the main case, one of
which, is a continuation of one of the standards for the feed-roller, and the other
a separate block secured in any proper manner to. the said case. The said
feed-roller and horizontal shaft are axially in the same vertical plane and the latter
is provided with two gear-wheels of different diameters separated from each other
but attached to, or forming a part of, a common sleeve which surrounds the said
shaft and is connected thereto by a longitudinal spline-joint so as to be free to slide
lengthwise thereon and at the same time to rotate with the shaft. The smaller
gear-wheel on the said shaft is the inner one of the two and its diameter is such as
to engage with an inner and larger gear-wheel on the said feed-roller, and the

page_text: diameter of the outer and larger gear-wheel on the said shaft is such as to engage
with an outer and smaller gear-wheel on the said feed-roller. The gear-wheels on
the said shaft are situated so that when the inner one is engaged with the
corresponding inner gear-wheel on the feed roller the other one will be disengaged
from the corresponding outer gear-wheel on the said feed roller and vice versa.
The said engagement and disengagement is effected by sliding the gear-wheels
on the said shaft and their carrying sleeve along their shaft, and for this purpose a
lever is provided.
'
This lever by its forked end partially surrounds the said sleeve and it turns
upon a fulcrum fixed in the main case. The said lever projects for convenience
of operating it, through a slot at the front side of the main case as the said case is
located upon the musical instrument, and the end walls of this slot limit the throw
of the lever in either direction and are situated so as to secure the relative
engagement and disengagement of the gear-mechanism above described.
A worm gear-wheel secured to the aforesaid shaft meshes with a worm gear-
wheel upon a horizontal shaft arranged to turn in suitable bearings in the main
case, and to be driven by a hand crank or winch attached to it at the front side
of the said case or by any other suitable means.
There is a lever or jack for each row of perforations in the music sheet, and each
lever has a wedge-shaped projection and is arranged within a separate guide way
or groove of the aforesaid horizontal platform, and the said jack-levers are
severally horizontal and project toward the front of the main case and they are
arranged to turn upon a fulcrum. Under the aforesaid platform are horizontally
arranged hammer-levers, one for each of the jack-levers. Each hammer-lever at
one end is provided with an adjustable tappet or button head by which to rest
upon a key of the key-board of the musical instrument and is arranged to swing
in a vertical plane upon a suitable fulcrum and to be given a spring-pressure in a
downward direction upon its proper key of the instrument.
According to a modification the fulcrum of each hammer-lever is a separate
horizontal pin mounted in a separate vertical lug, which lugs are severally secured
to a common stationary horizontal rail fixed in the main case and the downward
spring pressure upon each hammer-lever is secured by a separate_bent spring
arranged at one end to bear downward upon the upper edge of the lever between
its tappet and fulcrum and at the other end, secured to a common horizontal rail
fixed in the main case which may either be a stationary one or one that is hinged
and adapted to be depressed against the pressure of the several springs which it
carries by turning in one direction a screw-rod or adapted to rise with the pressure
of the several springs which it carries when the said screw-rod is turned in the other
direction.
The said screw-rod projects to the front of the main case and there is provided
with a knob for convenience in turning it; and it has on its inner end a head in
position to bear upon the upper face of one of the aforesaid rails which face has
an incline of suitable direction to secure in the inward and outward movements of
the screw-rod respectively a downward swing and upward swing of the said rail
upon its hinges.
The downward swing of the rail increases and the upward swing decreases the
pressure of the springs upon the hammer-levers and thus each pressure may be
adjusted.
According to another modification each hammer-lever has a separate fulcrum on
a coinmon horizontal rail and its downward spring-pressure is secured by giving
the lever itself a bent form and springy character and attaching it to the said rail.
Each spring hammer lever passes through a separate guide-slot of a common
stationary rail and the aforesaid rail to which they are severally attached is hinged
to the upper side of a stationary horizontal rail fixed in the main case and it is
arranged to be swung thereon and adjusted by a thumb set-screw or set-screws to
give a greater or lesser degree of spring-pressure to the hammer-levers as may be
desired.

page_text: Each hammer-lever is connected with a jack-lever and such jack-lever as to its
row of perforations in the music sheet, agrees with the relative position of its key
in the scale of the key board upon which the said haminer-lever rests.
According to one arrangement the jack-levers are in lines parallel with each
other and with the lines of the keys and the hammer-levers run in diverging lines
at and from each side of the central hammer-lever and each jack-lever rests upon
the upper end of a vertical pin which, at its lower end, rests upon the hammer-
lever for such jack-lever. These several vertical pins are arranged in separate and
distinct vertical guide-holes of a common stationary horizontal rail fixed in the
main case.
According to another arrangement the jack-levers and the hammer-levers are in
lines parallel with each other and with the lines of the keys, and the mechanism
which makes the connection between the Jack and hammer-levers, runs in each
instance in a diverging line at and from each side of the central hammer lever and
jack-lever, which levers, together with the connecting mechanism, are in a
coincident vertical plane. In this arrangement each jack-lever is of an angular
shape, the fulcrum being at its angle; and the lower vertical arm of the lever is
connected by a wire or other flexible rod to the upper vertical arm of an angular
lever which has its fulcrum in a lug fixed in the case, and its other arm is
connected by a rod to the outer end of the proper hammer-lever for such jack-
lever
As arranged, the wire connections and angular levers run diagonally, and in
order to secure an action between the wire connections and the jack levers in a
direct line with the jack levers each wire connection, except that of the central
hau mer aud jack levers, runs about and has a bearing against, a separate and
vertical roller which rollers are severally attached to a common horizontal rail in
the main case and suitably located to secure the said direct action
Devices other than the roller herein before described as the feed roller, may be
employed for feeding the music-sheet forward through the attachment without
depending on a roller for the feed, in which case the roller may be replaced by a
stationary bar with grooves in its face toward the jack-levers. I provide devices
for lifting and holding the hammer-levers out of their operative position, more
particularly when the attachment herein described is to be placed into and out of
its position upon the musical instrument. A horizontal angular rail is hinged at
its angle to a stationary horizontal rail and an operating cam-lever is provided
which is so arranged that when turned in one direction it will throw the edge of
the angular rail against the under side of the hammer-levers and thus lift them to
a position in which they will be held until the said cam-lever is released by
turning it in the opposite direction, which releases the rail and leaves the hammer-
levers free to be thrown into their operative position.
In the combination of the aforesaid attachment with a reed-organ, in order to
facilitate the drawing of the stops of the organ, the attachment is provided with a
suitable number of draw rods. Each draw-rod passes through the main case from
front to rear and has a knob at its front end for convenience in operating it, and
at its rear or inuer end as two curve spring-arms shaped at their outer ends to
engage the socket in the opposite sides of a stop-knob and of sufficient length to
practically surround the said stop-knob and to be held in the engagement described
by means of the spring given to the arms which obviously allows them to be
readily detached.

page_text: .
securing an automatic operation of the keys from the travel of, and in accordance
with the perforations of a music sheet of paper or of other suitable material, in
proper relation to the operative mechanism of the attachment.
The case A when its hooks bare engaged with the recesses c of the blocks E
rest by the lower edge d of each of its end pieces B B upon a suitable block fixed
at each end of the key board and which blocks may be in one piece with the
blocks E or separate therefrom but situated in such relation thereto as to secure
a rest and consequently a support for the case A when the hooks b are engaged
with the recesses c.
The music sheet F is made of card-board, paper, cloth, or other suitable flexible
material, and has cut in it, a series of parallel and equidistant rows of perforations e
which perforations are of lengths and of a relative arrangement, to represent the
different notes of a tune or of a chord or of any other arrangement of musical
tones. The said music sheet may be of any desired length but for its proper
guidance through the attachment it preferably should have a width equal to the
distance between the two parallel end standards G G which project above the
platform C. The music sheet travels over the platform C in and between the said
standards in the direction represented by the arrow Figure 2, the travel is caused
by means of a horizontal feed roller H arranged to turn at each end in bearings
in the standards G G and with flanges to closely press the music sheet F to the
upper surface of the platform c at and between the series of holes in it. These
holes are at equal distances apart and they severally correspond in position to the
rows of perforations e in the music sheet; the feed roller H has in corresponding
lines therewith a series of parallel peripheral grooves g of equal depth which is
.sufficient to admit the projections of levers or jacks J through the perforation e
. of the music sheet F and into the said grooves.
The feed roller H between its peripheral grooves g that is at its flanges or
portions which bear upon the music sheet is covered with india rubber or other
yielding or elastic material and preferably one which will secure a friction and
hold upon the music sheet to ensure its feed or travel over the platform as the feed
roller is turned. Two gear wheels K and L are secured to a journal m at one end
of the said feed roller; the inner gear-wheel K is of a larger diameter than the
outer gear-wheel L and the two are separated from each other as shown.
A horizontal shaft M is located below the platform C and is arranged to turn
at each end in suitable bearing blocks n in the case A, one of which is a con-
tinuation of one of the standards G for the feed roller H and the other a separate
block secured in any suitable manner to the said case.
The feed roller H and horizontal shaft M are axially in the same vertical plane,
and the latter is provided with two gear-wheels O and P of different diameters
separated from each other, but attached to or forming a part of a common sleeve Q
which surrounds the shaft M and is connected thereto by a longitudinal spline
joint, so as to be free to slide thereon and at the same time to rotate with the
shaft.
The smaller gear-wheel O on the shaft M is the inner one of the two and its
diameter is such as to engage with the inner and larger gear-wheel K on the feed
.roller H and the diameter of the outer and larger gear-wheel P on the shaft M is
such as to engage with the outer and smaller gear wheel L on the feed-roller. The
gear-wheels Ü, P on the shaft Al are situated so that when the inner one O is
engaged with the corresponding inner gear wheel K on the feed roller the other
one P will be disengaged from the corresponding outer gear-wheel L on the said
feed roller and vice versa.
This engagement and disengagement is effected by sliding the gear wheels O, P
and their carrying sleeve Q along. their shaft, and for this purpose, a lever R is
provided.
This lever R with its forked end r partially surrounds the sleve. Q and turns
upon a pivot s on the case A. The end t of the said lever projects for convenience
of operation through a slot w¹ at the front side of the case A as the said case is

page_text: located upon the musical instrument the end walls of this slot limit the throw of
the lever in either direction and are situated so as to secure the relative engagement
and disengagement of the gear mechanism above described.
A worm wheel S is secured to the shaft M and engages with a worm T upon a
horizontal shaft U arranged to turn in suitable bearings in the case A and to be
driven by a crank handle or winch Q2 attached to it at the front of the case or by
any other suitable means.
The turning of the driving shaft U secures through the connecting mechanism
described the turning of the feed roller and according as either the large or the
smaller gear-wheel of the shaft M is meshed with its gear-wheel of the feed roller,
the said feed roller will be driven with a greater or lesser degree of rapidity.
There is a lever or jack J for each row of perforations e in the music sheet and
each of the said levers at the part which projects through the perforations of the
music sheet and into a groove g of the feed roller has a wedge shaped projection v.
Each lever or jack J is also arranged within a separate guide-way or groove 1 of
the horizontal platform C, the said jack-levers are. arranged horizontally and
project towards the front of the case A and they are arranged to move upon a
pin w which preferably is of a continuous wire located and secured in a suitable
position therefor. Under the aforesaid platform are horizontally arranged hammer-
levers W one for each of the jack-levers. Each hammer-lever W at one end is
provided with an adjustable tappet or button-head with which to rest upon a
key X of the key board of the musical instrument, and is arranged to swing in a
vertical plane upon a suitable fulcrum and to receive a spring pressure in a
downward direction upon its proper key of the instrument.
According to a modification shewn in figures 2, 5 and 6 the fulcrum of each
hammer-lever W is a separate horizontal pin y mounted in a separate vertical lug z
which lugs are severally secured to a common stationary horizontal rail Y in the
case A. The downward spring pressure upon each hammer-lever W is secured by
a separate bent spring Z arranged at one end to bear downward upon the upper
edge of the lever, between its tappet and fulcrum y and at the other end,
severally secured to a common horizontal rail A2 in the case A. which rail may
either be a stationary one as shewn in Figures 2 and 6 or one that is hinged as
at a Figure 5 and adapted to be depressed against the pressure of the several
springs which it carries by turning in one direction a screw-rod B² or to rise with
the pressure of the said springs when the said screw rod is turned in the other
direction.
The screw-rod B2 figure 5 projects from the front of the case A and is provided
with a knob b² for convenience in turning it; it has on its inner end a head c³ in
position to bear upon the upper face a² of the rail A² which face has an incline of
suitable direction to secure in the inward and outward movement of the screw-
rod B respectively a downward and upward movement of the said rail A² upon
its hinges a².
The downward movement of the rail increases and the upward movement
decreases the pressure of the springs upon the hammer-levers and thus such
pressure may be adjusted
According to another modification as shown in Figure 9 each hammer-lever has
a separate fulcrum at f, on a common horizontal rail G2, and its downward spring
pressure is obtained by giving the lever itself a bent form and springy character,
and attaching it to the rail G². Each of the said spring hammer-levers passes
through a separate guide slot g³, of a common stationary rail D2 and the rail G².
to which they are severally attached is hinged to the upper side of a stationary
horizontal rail E2. of the case A. and is arranged to be swung thereon, and
adjusted by a thumb set-screw or set-screws h². to give a greater or lesser
degree of spring-pressure to the hammer levers as may be desired.-The turning of
the thumb-screw h. in one direction swings the rail G2 in a manner to increase
the spring pressure of the spring hammer levers and the turning of it in the other
direction operates to diminish the pressure.
"

page_text: .
Each hammer-lever W is connected with a jack-lever J. and such jack-levers as
to its row of perforations in the music-sheet, agrees with the relative position of
its key X in the scale of the key board upon which the said hammer-lever
rests.
It is obvious for a proper relative arrangement of hammer levers and jack-levers
as to the keys of the key-board, and the rows of perforations in the music-sheet,
that if the music-sheet, and the guiding and feeding mechanism be narrower than
the width occupied by the several keys of the key-board of the instrument either
the hammer levers, or the jack-levers, or the connecting mechanism between the
two sets of levers, or two or more of such separate contrivances, must of necessity
run in lines more or less diverging from each other and from the line of the central
attachment where all such contrivances are coincident with such central line and
with the key of the key-board, and this divergence of the contrivances, will be
uniform and regular upon each side of the said central line of the attachment; if
the said attachment be arranged for the feed-roller to operate on the music-sheet,
so that the central line of the music sheet travels in a line coincident with the line
of the central key of the key-board-In the drawings two separate arrangements
of the hammer-levers and jack-levers such as above referred to, and also two
modes of connecting a lever of the one set to a lever of the other set are
shown'
According to one arrangement shewn in Figures 1, and 2, the jack-levers are in
lines parallel with each other and with the lines of the keys X and the hammer-
levers W run in diverging lines at and from each side of the central hammer lever;
each jack-lever rests upon the upper end of a vertical pin F. which at its lower
end, rests upon the hammer-lever for such jack-lever
The several vertical pins F 2 are arranged in separate and distinct vertical guide
holes ². of a common stationary horizontal rail G. of the case A and with the
jack-levers and hammer levers are arranged for the depression of the free end m².
of a jack lever, to depress the inner end of its hammer-lever W and raise the outer
end of such lever against its spring pressure, and for the free end of the jack-lever
and inner end of the hammer lever to be raised, because of the downward spring
pressure of the hammer-lever, when the force applied to depress the jack-lever is
removed.
According to another arrangement shewn in figures 8 and 9 the jack levers J
and the hammer-lovers W. are in lines parallel with each other and with the lines
of the keys X and the mechanism which makes the connection between the jack
and haminer levers runs in each instance in a diverging line at and from each side
of the central hammer-lever and jack-lever which levers together with the
connecting mechanism are in a coincident vertical plane. In this arrangement
each jack lever is of an angular shape, the fulcrum being at its angle; the lower
vertical arm n² of the lever is connected by a wire q². or other flexible rod to the
upper vertical arm 7. of an angular lever H2 which has its fulcruin s in a lug t2,
and its other arm u² is connected by a rod v². to the outer end of a hammer-lever W
for such jack lever. As a haminer lever and its jack lever necessarily are not in
the same vertical plane, except as to the central hammer lever and its jack lever
and as the jack levers and hammer levers are arranged in parallel lines with each
other, the mechanism above described as connecting a jack and a hammer lever
necessarily must ruu in one if not more of its parts diagonally with the parallel
arrangement of the jack and hammer levers except it is the central hammer lever
and jack lever.
As arranged the wire connections and angular levers run diagonally and in
order to secure an action between the wire connections and the jack levers in a
direct line with the jack levers, each wire connection except that of the central
hammer and jack levers runs upon and has a bearing against a separate and
vertical roller w, which rollers are severally attached to a common horizontal
rail J suitably located to secure the said direct action.
The arrangement of the jack and hammer levers and 'the connection between

page_text: them as above described is for the depression of the free end m² of a jack lever
(that is the end located to pass into and out of a perforation in the music sheet,
and a groove of the feed roller) to operate upon the hammer lever of such jack
lever in a direction to raise the outer end of the said hammer lever against its
spring pressure and for the free end m2, of the jack lever to rise, and the outer end
of the hammer lever to lower when the force applied to depress the jack lever is
removed.
In both arrangements of the hammer levers and jack levers, together with the
construction and arragement of feed roller and other parts previously described,
the music sheet is caused to move over the platform C under the feed roller, and
as the solid or unperforated portions of the said music sheet come into contact
with the jack levers, the said levers are depressed to a distance corresponding to
.the depths of the grooves in the feed roller H and to the thickness of the material
composing the music sheet, the outer ends of the hammer levers are lifted to a
sufficient distance in relation to the keys, for the keys to resume their normal
position of rest and be maintained in such position until perforations of the music
sheet engage with the jack levers, when the corresponding hammer levers are free
to act under the influence of their springs and then act upon their keys and
depress them, and thus secure the sounding of the notes belonging thereto, and so
the parts remain until another solid or unperforated portion of the music sheet
comes into contact with the jack levers, when the raising of the hammer levers
again takes place and the keys come to a normal position of rest.
It is apparent from the description given that the throw of the hammer levers
is not dependent upon the thickness of the music sheet, but has increased length
given to it because of the grooves g, in the feed roller, whereby comparatively
thin material for the music sheet may be used without practically affecting the
correct operation of the attachment. Devices other than the roller hereinbefore
described as the feed roller may be employed for feeding the music sheet forward
through the attachment, without depending on the roller for the feed in which
case the roller may be replaced by a stationary bar with grooves g, in its face
toward the jack-levers.
In figures 2, 4, 6, and 9 are shown devices for lifting and holding the hammer-
levers out of their operative position, more particularly when the attachment is to
be placed into and out of its position upon the musical instrument.
In Figures 2 and 4 a horizontal angular rail K2 is hinged at its angle to a
stationary horizontal rail Y and an operating cam-lever Mis provided which is so
arranged that when turned in one direction it will throw the edge ² of the
angular rail against the under side of the hammer levers W and thus lift them to
a position in which they will be held until the said cam lever M² is released by
turning it in the opposite direction, which releases the rail and leaves the hammer..
levers free to be thrown into their operative position.
In Figures 6 and 9 the arrangement is substantially and practically the same,
and differs only in matters of form and arrangement in the latter case more
especially as to the point of operation of the hinged rail K2 upon the hammer-
levers or upon mechanism connected therewith. The description already given of
the arrangement in Figures 2 and 4 is so plain that further description is deemed
unnecessary. The attachment which has been described, is shewn in combination
with the key board of a.reed organ of ordinary and well known construction.
In the combination of the attachment with a reed organ, in order to facilitate
the drawing of the stops the attachment is provided witli a suitable number of
draw rods N2 Figure 9.
Each of the said rods passes through the case from front to rear and has a knob
y at its front end for convenience in operating it, at its rear or inner end, it has
two curved spring arms 22 shaped at their outer ends to engage with sockets a³ in
the opposite side of a stop knob 02 and of sufficient length to practically surround
the said knob and to be held in the engagement described by means of the spring
given to the arms, which obviously allows them to be readily detached.

page_text: This construction and arrangement of a draw rod N2 enables the organ stop to
which it is connected to be drawn from or returned to the front of the case, when
the attachment is in operation.
Having thus fully described the said invention as communicated to me by my
foreign correspondent and the manner of performing the same I wish it under-
stood that I claim
:-
First In a mechanical apparatus constructed to be attached to the key-board
of a musical instrument, the combination of the jack-levers J, vertical pins F³,
spring hammer levers W, platform C and feed mechanism, all constructed and
arranged to operate in connection with the travel of a perforated music sheet
and the keys of the instrument, substantially as described, for the purpose
specified
Second-In a mechanical apparatus constructed to be attached to the key-
board of a musical instrument, the combination of the jack-levers J, vertical pins
F, spring hammer-levers W, platform C and grooved feed roller E, all constructed
and arranged to operate in connection with the travel of a perforated music sheet
and the keys of the instrument, substantially as described, for the purpose
specified.
Third: In a mechanical apparatus constructed to be attached to the key board
of a musical instrument, the combination of the jack-levers J, connecting rods q
angular levers H2 connected to spring hammer levers W, platform C and feed
mechanism, all constructed and arranged to operate in connection with the travel
of a perforated music sheet and the keys of the instrument, substantially as
described, for the purpose specified.
Fourth-The hammer-levers W having the spring acting portion secured to a
rail which is hinged and adapted to be adjusted in position to regulate the spring
pressure upon the hammer-levers substantially as described.
Fifth The spring hammer-levers W, in combination with an angular rail lever
K which is hinged and arranged to be operated upon by a cam lever M³, all
substantially as, and for the purpose, described.
Sixth-In a mechanical apparatus constructed to be attached to the key-board
of a reed organ and to secure an operation of the keys of the instrument by means
of mechanism actuated by the travel of a perforated music sheet, the draw rod N
which is constructed and arranged to be attached to an organ stop of the instru-
ment, so as to operate the same, all substantially as described for the purpose
specified.
Seventh-The slide draw rod N2 having spring fingers 2, in combination with
the organ stop O2 and with an attachment to the key-boards of musical instru-
ments, substantially as described, and for the purpose specified.
Eighth The combination, with a feed roller for feeding a perforated music
sheet, of gear wheels K, L, attached to the said roller and of gear wheels O, P,
arranged to be connected with and disconnected from the said gear wheels of the
feed roller, substantially as, and for the purpose, described.
In witness whereof I the said William Robert Lake have hereunto set my
hand and seal this Fifth day of October in the year of our Lord One
thousand eight hundred and eighty two.