Year: 1887

page_text: Date of Application, 22nd Feb., 1887.
Complete Left, 29th July, 1887.
Complete Accepted, 2nd Sept., 1887.
1, ARTHUR EISEN, of No. 5, Mylne Street, Pentonville, in the County of Middlesex,
Watchmaker, do hereby declare the nature of this invention to be as follows
My invention relates to an improved construction of musical instruments in which
the tune is produced by the rotation of a barrel bringing pins or studs projecting from
its periphery into timed contact with the teeth of a metal comb, a series of hammers,
or the valves of a series of organ tubes, or other devices for producing musical
notes.
According to the system of construction at present in vogue, the barrel is movable
upon its arbor, and there are mounted upon the end of the barrel and its arbor, the
staircase, steel-piece, spiral spring, carrier plate and pin. The consequence is that
each barrel must be fitted with a duplicate set of the above mentioned parts before
it can be put in gear with the driving barrel.
The object of my invention is to obviate the necessity of fitting each barrel with a
duplicate mechanism, and an arbor extending through it; and the advantage of it will
be a reduction in the cost of duplicate barrels without interfering with the correctness
of the performance of the instrument.
In carrying my invention into effect, all the mechanism usually fixed at or upon the
end of the barrel is removed therefrom, and fixed upon the frame or base at a short
distance from said end.
I provide a pair of standards in which the first motion pinion is carried, the arbor
of which is hollow and has its outer end sufficiently long to project through the inner
standard. The spur-wheel upon the driving barrel engages with the said pinion.
On the longer end of the hollow axis of the first motion pinion I fix the spur-wheel
which drives the fly-train, and next to the inner face of this wheel, the snail or stair-
case for the purpose of changing the time is fixed.
The central arbor within the hollow arbor having a lateral motion, projects beyond
the outer standard and carries a spiral spring and an adjusting nut, the spring being
confined between the outer end of the hollow arbor and the nut.

page_text: The inner end of the central arbor carries a block which rides up the snail as the
tunes are successively changed, and, when the programme has been exhausted, the
spiral spring above mentioned pulls the central arbor (and the barrel connected to it
as hereafter explained) outwards, till the block is again at the foot of the snail. Next
to the block, and consequently on the extreme inner end of the central arbor, I mount
a metal disc the motion of which towards or away from the fly-train spur-wheel is
guided by pins. One of these pins projecting from the face of the wheel has a step
cut in its nose, and being controlled by a spring, this step will engage with the disc
when the latter is pushed away from the fly-train spur-wheel.
The barrel rotates in a pair of standards fixed to the frame or base. The arbor-ends
of the barrel are of two diameters, the major diameter giving the journal surfaces,
and the smaller allowing of the barrel being dropped down slots in the standards, said
slots terminating in the bearings which receive the arbor-journals under the action
of the spiral spring. It will be obvious that when the arbor-journals are bedded
home within their bearings in the standards, a complete locking result is obtained by
means of the pin with the step cut in its nose being released from the disc, when the
spiral spring will draw the barrel home.
The inner barrel-arbor carries on its outer end a metal disc-carrier from which
projects an adjustable coupler, the end of which coupler engages with the disc upon
the inner end of the central arbor above mentioned, by entering a slot cut in said disc
which latter the coupler embraces so that the barrel must move with the disc in either
direction.
By means of the adjustability of the coupler, after a barrel has been coupled to the
driving mechanism, any adjustment, no matter how small, necessary to make the pins
of the barrel engage properly with those teeth of the comb or other corresponding
part of the instrument for which the barrel is set, can be easily made.
I do not confine myself to fixing the improved mechanism which is the subject of
my invention on either the right or the left hand of the barrel.
Dated this 92nd day of Fahr 1887
PHILLIPS & LEIGH,
Agents for the Applicant.

page_text: The barrel arbors c, c', are fast upon the respective ends of the barrel, and are turned
down at c³, to allow of the barrel being let down the slots d in the standards d d'
into the bearings d³.
H, H' are a pair of standards upon the bed A, in which can rotate a hollow
arbor upon which is fixed the first motion or steel pinion ¹ engaged by the driving
barrel E.
The hollow arbor h is continued through the standard H¹, and carries the spur
wheel I which drives the fly train e.
J is a disc fast upon the end of an axis j which can move freely from right to left
or left to right in the hollow arbor h. The axis j is longer than the hollow arbor h
for the purpose of providing for the longitudinal motion of the barrel when the tune
is to be changed, as well as for the return motion of the barrel at the end of its
répertoire. Upon the outer end of the axis ; I provide a spiral spring which is
confined thereupon by a nut between it and the adjacent face of the standard H.
K is the snail or staircase upon a disc concentric with the spur wheel I; and L,
the steel piece. Both of these parts are, respectively, of the usual construction.
M is a guide pin fast upon the disc J, and moving through a corresponding
perforation in the wheel and disc I.
N is a discharge pin on a spring n fixed to the disc of the wheel I, and projecting
through a hole n³ in the disc J. Its nose is cut down, producing a small shoulder n
which can be engaged with the disc if the latter be moved far enough to the
right.
The releasable connection between the above described actuating mechanism and
the barrel consists of a carrier plate O, fast upon the arbore of the barrel, and an
adjustable connector P projecting from the carrier plate and engaging in the notch p
in the disc J.
The operation of my invention is as follows.
Assuming that when the barrel now playing has finished its last tune it is then desired
to change the barrel for another pricked with a different set of tunes, the detent q
is allowed to engage in the notch q¹, by which time the left hand extremities of the
arbors c, c¹ will be flush with the left hand faces of the standards d, d¹; and the
connector P at the top of its revolution.
The disc J is then pulled to the right until the shoulder n' engages it. The smaller
diameters c, c, of the arbors c, c¹, now coincide with the slots din the standards d, d¹,
whereupon the barrel can be lifted by the connector and the opposite arbor.
A fresh barrel with arbors, carrier, and connector, is then placed in the standards,
and the connector adjusted so that it engages with the disc J tightly, and also that
the barrel engages properly with the comb when it begins to rotate.
The discharge pin is next pressed when the spring will draw the barrel, arbors,
carrier, connector and disc to the right till the steel piece bears upon the foot of the
snail. The disengagement of the detent q from the notch q¹ will start the barrel, each
change of tune resulting in a compression of the spring ; and if the same tunes
are to be repeated, the expansion of the spring will move the barrel and the parts
connected with it to the left after the steel piece has passed the highest point of the
snail.
I am aware that it has already been proposed to make the barrels of mechanical
musical instruments detachable from the actuating mechanism for the purpose of
exchanging this part of the instrument for one pricked with another set of tunes, and
I would have it distinctly understood that I lay no claim broadly to exchanging the
barrels, but
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is :-
1. The combination of a hollow arbor upon which are fixed the first motion or steel
pinion and the spur wheel which drives the fly train, with an arbor moved longi-
tudinally in said hollow arbor by the snail or staircase in the one direction, and in

page_text: the reverse direction by the expansion of a spring compressed by the previous
motion of said arbor; substantially as described with reference to the accompanying
figures.
2. The combination of an arbor having a disc with a radial slot cut in it fast on the
end thereof next the barrel, and moved in the one direction in the hollow arbor upon
which is fixed the first motion or steel pinion by the snail or staircase, and in the
reverse direction by a spring compressed by the previous motion of said arbor, with
a connector on the adjacent end of a removable barrel, which connector engages in
the radial slot of said disc for the purpose of making the barrel partake of the rotary
motion thereof; substantially as described with reference to the accompanying
figures.
3. The combination with an arbor movable in one direction by the snail or stair-
case in the hollow arbor on which is fixed the first motion or steel pinion, and in the
reverse direction by a spring compressed by the previous motion of said arbor, of a
disc fast upon the end of said movable arbor next the barrel; a discharging pin
projecting through, and a guide projecting from, said disc; a connector fixed to the
barrel and engaging with said disc; a removable barrel having arbors of two diameters,
and bearings access to which is afforded by means of slots of the width of the smaller
diameters of the barrel-arbors substantially as described with reference to the
accompanying figures.
4. The combination of a disc (having a radial slot cut therein) fast on the end of an
arbor movable in the one direction by the snail or staircase and in the reverse
direction by a spring compressed by the previous motion of said arbor, with a disc
fast upon the outer end of the adjacent arbor-end of the barrel; a connector of
adjustable length fixed to said last mentioned disc and capable of engaging in the
aforesaid radial slot, its engagement therewith adjustable for the purpose of making
the pins (or their equivalent) on the barrel contact fairly with their respective teeth
of the comb (or equivalent parts of the instrument); substantially as described with
reference to the accompanying figures.
5. The combination of a barrel having two arbor-ends, each turned down to a
diameter equal to the width of vertical slots cut in the standards in which the bearings
of the arbor-ends are formed, with a connector attached to one arbor-end conveniently
for disengageably engaging with the actuating mechanism of the instrument;
substantially as described with reference to the accompanying figures.
Dated thin 90th dow of Im 1907
Dated thi 90th
day of
mku 1997
PHILLIPS & LEIGH,
Patent Agents,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.