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Патент USA US2134176

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2,134,176
Patented Oct. 25, 1938
UNITED STATES
PATENT ‘OFFICE
2,134,176
ACCORDION
Ermoly Demianenko, New York, N. Y.
Application March 18, 1937, Serial No. 131,621
4. Claims. (Cl. 84-376)
This invention relates to accordions, and par
ticularly to piano type accordions, wherein the
tonal reed valves are operated by banks of keys
akin to the regular piano keyboard, the bank of
5 white keys operating the major scale valves and
the lack keys operating the minor scale valves.
In such piano accordion it is possible to play a
fast run of successive major scale tones by run
ning the ?ngers pressingly and without striking
10 over the bank of white keys from left to right,
but it is not possible to similarly play a run of
chromatic scale tones, for the reason that the
black minor keys are situated rearwardly and
are disposed in elevated protrudence above the
15 white keys.
The principal object of the invention is to pro
vide a piano accordion with means wherewith
the musician may be enabled to play a run of
chromatic scale tones as conveniently and ef
2 0 ?ciently as it was heretofore possible to play a
fast run of major scale tones on such instru
ment.
Other objects and advantages will hereinafter
appear.
In the accompanying drawing,
Fig. l is a perspective view showing a frag
mentary portion of a piano accordion equipped
with the improvements of this invention.
Fig. 2 is a transverse~sectional side elevation
30 of a piano accordion of the invention.
The accordion l comprises bellows 2, a par
tition 3, a set of reed boxes 4 with reeds 5 for the
major scale tones carried by said partition, a set
of reed boxes 6 with reeds ‘l for the minor scale
tones similarly carried by the partition, outlets
8 in partition 3 for said boxes, valves 9, ID, for said
outlets, a bank of white piano keys ll fulcrumed
at l2 in a framing l3 for operating the valves
9, and a bank of black keys [4, similarly ful
crumed at 15 for operating the valves l0. Each
of the white keys ll operates its valve 9 by an
arm l6 thereof being joined to said valve, and
each of the black keys l5 similarly operates its
valve :0 by an arm I‘! thereof being joined to
45 the latter. Springs l8 bearing upon said keys
and the framing 13 press the keys H, 14 up
wardly to normally maintain the valves 9, ill in
the closed state shown, while pressing downward
ly upon said keys opens the valves for production
50 of the tones.
Underneath the banks of keys ll, [4 is located
a series of plungeable rods l9 mounted and lon
gitudinally slidable in guiding bearings 20 de
pending from the framing 13. Each rod I9 is pro
55 vided at its forward terminal with a ?nger-piece
26 constituting a playing key, and carries at its
opposite terminal a flange 22, collars 23 secured
to rod i9 normally abutting against the bearings
‘all to limit the outward movement of the rod as
viewed in the ‘drawing. For each of the plungers 5
i9 there is provided a lever 24 fulcrumed at 25
to a post 26 ?xed to partition 3. The forward
terminal 21’ of lever 24 abuts against the plunger
flange 22, while its opposite terminal 28 abuts
either against an arm I‘! of a valve in or an arm 10
it of a valve 9, according to whether conjoint
operation is required from key 2! of a valve I0
or a valve 9, the ?nger pressure upon said key
in this manner causing its rod 19 and ?ange 22
to swing the lever 24, and to press upwardly upon 15
arm ll or US to open its corresponding valve
S0 or 9.
There is thus provided a key 2 l, with its above
described operating parts It, 24, for each of the
white keys ll of the major scale as well as for 20
each of the black keys M of the minor scale,
and the keys 2| are arranged successively in the
chromatic scale order, in convenient relation to
the musician’s ?ngers, as illustrated in Fig. 1.
The musician is therefore enabled to run his 25
?ngers pressingly and without striking over this
third bank of keys 2 1, toward the right or toward
the left, and thereby perform a fast run of chro
matic scale tones, for producing desired musical
effects.
Variations may be resorted to within the scope
of the invention.
Having thus described my invention, I claim:
1. An accordion having the combination of a
set of major scale reeds, a set of minor scale
reeds, valves for said reeds, a bank of piano keys
for said major scale reed valves, another bank
of piano keys for said minor scale reed valves, a
bar joining each of said keys with its respective
valve, a longitudinally movable plunger rod for
each of said keys located underneath it and par
allel thereto, said rod being mounted in guiding
means therefor, the operative forward terminal
of said rod carrying a finger piece located at the
forward terminal of its related major scale key,
said ?nger pieces being arranged in chromatic
scale order, and means to transmit the movement
of said rod to the bar of its respective key.
2. An accordion having the combination of a
set of major scale reeds, a set of minor scale
reeds, valves for said reeds, a bank of piano keys
for said major scale reed valves, another bank
of piano keys for said minor scale reed valves, a
bar joining each of said keys with its respective
valve, a longitudinally movable plunger rod un-
35
40
45
50
55
2
2,134,176
derneath each of said keys and disposed parallel
thereto, means for mounting and guiding said
rod, a ?nger piece carried by the operative for
ward terminal of said rod being situated at the
frontal terminal of its related major scale key,
said ?nger pieces being arranged in chromatic
scale order, and a lever transmitting the move
ment of each of said rods to the bar of its respec
tive key.
10
3. An accordion having the combination of a
set of major scale reeds, a set of minor scale
reeds, valves for said reeds, a bank of piano keys
for said major scale reed valves, another bank
of piano keys for said minor scale reed valves,
means joining each of said keys with its respec
tive valve, a longitudinally movable plunger rod
underneath each of said keys disposed parallel
thereto, means for mounting and guiding said
rod, a ?nger piece carried by the operative frontal
terminal of said rod being disposed at the frontal
terminal of its related major scale key, said rods
and finger pieces being arranged in chromatic
scale order, and means transmitting the move
ment of each of said rods to its respective valve.
4. An accordion having the combination of a 5
set of major scale reeds, a set of minor scale
reeds, valves for said reeds, a bank of piano keys
for said major scale reed valves, another bank
of piano keys for said minor scale reed valves,
means joining each of said keys with its respec 10
tive valve, a longitudinally movable plunger rod
underneath each of said keys disposed parallel
thereto, means for mounting and guiding said
rod, the operative frontal terminal of said rod be
ing disposed at the frontal terminal of its re
lated major scale key, said rods being arranged
in chromatic scale order, and means transmit
ting the movement of each of said rods to its
respective valve.
ERMOLY DEMIANENKO. 20
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