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Патент USA US2116117

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May 3, 1938.
Filed Nov. 11, 1936
/ madam
Patented May 3, 1938
Walter Homm, Bronx, N. Y.
Application November 11, 1936, Serial No. 110,247
1 Claim. (Cl. 84-—240)
This invention relates to new and useful im
provements in the manufacturing of upright con
sole spinet pianos, and it has for its special
purpose to construct a new type of pianos, which
5 contain features that are only obtainable at pres
ent in expensive grand pianos.
By the ingenious arrangement of the different
parts the damper is herein manipulated by a spe
cial rail separated from the hammer, thus pro
I in viding a shifting keyboard, which so far has not
been possible in an upright piano.
A further advantage of this invention lies in
the ability, through the present construction, as
hereinafter disclosed, to reduce the height of the
15 present uprights, one of the main objections made
by a prospective buyer in these modern times.
Still another advantage lies in the introduction
of a new regulating button, which in addition to
the capstan screw now used in ordinary pianos
20 makes the adjustment of the hammer swing an
easy matter.
A still further advantageous feature lies in the
fact that the height from the keyboard to the
hammer striking point is reduced to approxi
25 mately six and one-half inches, a feature made
“ possible
by the
introduction of a repetition
With the above and other objects in view, this
invention consists of the novel features of con
30 struction, combination and arrangement of parts,
hereinafter fully described, claimed and illus
trated in the accompanying drawing forming
part of this application, and in which similar
characters of reference indicate corresponding
5,; parts, and in which:
The ?gure is a side elevational view of my
improved arrangement in the construction of a
piano showing one unit comprising the key and
hammer members necessary in the operation of
40 my device, the continuous rails, serving all keys,
are shown in section, while in dotted lines are
further shown the relative position of the major
parts in motion.
Referring more particularly to the drawing,
45 Ill indicates a key in natural position and the
coordinate arrangement, including the front key
pin II, the balance key pin l2, and the capsta
screw 13.
The whip I4 is hinged to a member l5, as seen
50 at 16, and said member 15 is in turn, by a screw
l'l, fastened to a butt rail l8. A bridge, or cross
member, 20 has one end secured to the whip 14,
while a repetition lever 2| is hingedly mounted
upon the other end of said bridge, as shown at
55 22, and actuated by the repetition lever spring
23. Beneath the whip is arranged an extended
portion l9 adapted to engage the capstan screw
l3. To the end of the repetition lever 2| is se
cured another member 24, and to the latter is in
turn hingedly connected a jack 25; a jack-check
spring 26 engages the heel of said jack, keeping
the latter in proper position.
The jack 25 engages the butt 2'! of which the
hammer shank 28 and hammer 29 are integral
parts. To the whip I4 is furthermore secured a
damper spoon 30 constructed to engage the
damper ?ange 3|; said damper ?ange is hinged
to a member 32, which by means of a screw is
secured to a separate rail 34. A spring 35 se
cured to a small pin 33 mounted in member 32
keeps the damper 36 in the normal position, i. e.,
resting on the strings, indicated here by 31;
when the key is struck the position of the‘ same
will be as partly indicated in dotted lines. The
upward movement of the capstan screw forces 20
the end 38 of the repetition lever against the reg
ulating button 39, arranged adjustably in the rail
40; after contacting said button the member 24
and the jack hingedly secured to the same, will
actuate the butt, and subsequently the hammer
will hit the strings with a blow proportionate in
force to the one applied to the key.
A rail 4| with a regulating button 42 mounted
thereon is so arranged that the heel of the jack
will engage said button when the hammer is at
a predetermined distance from the strings; a
continuous movement will then force the jack to
swing away from the butt, thereby releasing the
pressure on said butt, and giving the hammer
spring 43, secured to the rail 44 an opportunity
to bring the hammer back from the strings im
mediately after contact with the same.
A member 45 fastened to the top of the butt
will on this backward movement engage a back
check 46 arranged on the whip and by holding
the hammer a short distance away from the
strings, giving the jack actuated by the jack
spring an opportunity to fall back into normal
position, when pressure is released from the key.
The damper will by the downward movement of
the other end of the whip 41 and the damper
spoon secured thereto be removed from the
strings, and spring 35 will then bring it back
in normal position, when pressure is released.
It is obvious that changes may be made in the 1
form, construction and arrangement of the sev
eral parts, as shown and described herein, with
in the scope of the appended claims, without de
parting from the spirit of the invention, and I
do not therefore wish to limit myself to the exact 55
construction and arrangement shown and de
scribed herein.
What I claim as new and desire to secure by
Letters Patent of the United States is:
A device of the class described, comprising a
key, a front key pin and a balance key pin 00
operating with said key, and a capstan screw
secured to the latter, a whip hingedly attached
to a rail, and having a repetition lever mounted
10 thereon, a jack pivotally arranged upon said
repetition lever, and a check-spring engaging the
heel of said jack, two set-buttons adapted to con
tact the repetition lever and the heel of said jack,
a spring actuating the repetition lever, a butt
hinged to a member, the latter being secured to a
rail, and a hammer shank and hammer forming
an integral part of said butt, a spring actuating
the latter, a backcheek secured to the whip, and
a cooperating member connected to said butt,
substantially as and for the purpose set forth.
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