Year: 1889

page_text: I, FRIEDRICH FERDINAND PIETSCHMANN, of No. 28 Brunnen Str. Berlin, Germany,
Manufacturer, do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement:-
ו'
.
...
My invention relates to barrel organs with note sheets, whereby the casing is divided
into an upper and lower compartment connected at the rear side by a suitable channel
or way by means of a slot in the front side of the organ, so that the note sheet in
the form of an endless band placed on the upper compartment can be moved forwards
in such manner that the same will run transversely through the instrument.
The crank shaft which is arranged transversely above the upper compartment,
operates the note sheet direct and also the bellows in the lower compartment. by
means of a suitable connecting rod, whereas the upper-compartment. serve to receive
the regulating bellows and the cells. The cell valves are operated on direct by the
note sheet by means of spring arms so that the hitherto customary intermediate levers,
axles, springs and other intermediate parts are rendered unnecessary.
The space between the valves and the cover to the casing can in this manner be
reduced to a minimum so that the tone can immediately issue from the instrument
which latter can be decreased in size to a considerable extent.
Figure 1 of the accompanying drawing represents a transverse vertical section.
Figure 2 a longitudinal section.
Figure 3 a top view with the cover removed and
Figures 4, 5 and 6 details of the construction.
The casing A, Figure 1, is divided into two compartments by means of a sloi or
narrow opening B. C is the upper and D the lower compartment, said compartments
being connected at the rear with each other by means of a channel or way c.
The bellows a for producing the supply of air is located in the lower compartment D
and is operated in the customary manner by means of a suitably cranked shaft and
a crank with handle for rotating the said shaft. For this purpose the cranked
portion of the shaft is connected with one end of a connecting rod ƒ running in a

page_text: space to the rear of the channel or way c, the other end of the said rod being
connected to the bellows a.
The compressed air escapes through the channel c into the regulating bellows e
as shown by the arrow and passes from thence in the customary manner into
the cells.
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Instead of
The channel c is opened and closed by means of the pressure valve d.
employing only one pair of bellows a, several bellows may be employed. After the
bow has been turned back the endless note sheet N is pushed over the upper com-
partment from the front of the casing, Figs. 1 and 2, and receives its movement
from a roller clad with india rubber, and is subjected to the pressure of an india
rubber clad roller n of the bowl which is secured by means of the arm m.
By this movement the note sheet N operates the valves i which are arranged in
one, two, or more rows. The valves i are attached to spring arms g, Figures 5 and 6,
which can be made of ordinary spring wire or metallic strips, so that the customary
levers, axles, accessory springs and other intermediate members can be omitted.
One end of the spring arms g are screwed to the rail whilst the other ends are
simply clamped into the slots of the valves i so that all lateral movement of the
spring arms is avoided, the said arms being so bent that they press against the note
sheet N. If an opening in the note sheet N appears the spring arm in question will
spring into the same and open 'the cell. As soon as the opening in the note sheet
has passed the spring arm the said note sheet will press the bent portion of the arm
downwards and close the valve. The-forward-bend of the spring arm will also be
somewhat compressed so that an increased pressure is exerted on the valve. If an
opening appears the bend of the arm springs back and the point of the same enters
the opening with great rapidity so that the tone is immediately produced. The
correct springing into the perforation, and guiding of the spring arms g is attained
by means of a sheet metal guide k. as shown by the dotted lines in Figure 3.
Figure 6 represents a further modification of the spring arm. The spring g is at r
bent to a spiral and the end of the same inserted in an opening of the valve and has
the tendency to open the valve, but is hindered by the note sheet N. If an opening
in the note sheet comes above the spring arm the same will spring into the opening
so that the valve is opened by the spiral spring.
The simple operation of the valve by the note sheet by means of these spring
arms g direct renders it possible to make the space between the valves and the cover
or lid of the instrument considerably smaller than with any other known system so
that the tone can issue direct from the said instrument. The extremely ready
operation of the spring arms 9 permits the employment of note sheets of ordinary
thin cardboard which can be glued together and folded instead of the expensive
leather boards customarily used for such note sheets.
The note sheets can, in this manner, be made in handy form, be cheaply manu-
factured and so that the same occupy little space. The advantages of the endless note
sheets in comparison with the known muff-like note sheets are very considerable. It
will also be evident that jointed or connected note sheet strips can also be used in
this instrument. My improved system of springs can also be employed for instru-
ments for playing from circular note sheets or instruments with stationary note sheets
whereby the height of such instruments can be considerably decreased as the arms
occupy little space.
זי.
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.
I
1. In barrel organs with endless band like note sheets, the casing A which is sub-
divided by a slot or narrow opening B into an upper compartment C and a lower
compartment D, said compartments being in connection with each other by a channel
or way c, the compartment. D containing one or more bellows a, and the compart-
ment C the air regulating bellows e, so that an endless note sheet operated "direct
from the crank shaft held down by the bow is moved above the upper compartment

page_text: in such manner that the bends of the spring arms g enter the perforations of the said
note sheet and thus operate the valves of the cells, substantially as and for the purpose
set forth.
2. In barrel organs, the arrangement of a slot or narrow opening running trans-
versely through the instrument in order to allow of the insertion of the note sheet
from the front of the said instrument, substantially as and for the purpose set
forth.
3. In barrel organs, the spring arms, 9, Figures 5 and 6, which are bent up in
appropriate manner so as to form contacts for the edges of the openings in the note
sheet and which operate the valves direct without the intervention of intermediate
levers, axles, auxiliary springs or other intermediate mechanical members, substantially
as set forth.