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Патент USA US2134192

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Oct. 259 was.
2,134,192’
L. c. KAULKNG
PIANO
Filed Aug. 4, 193'?
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2,134,192
Patented Oct. 25, 1938
UNITED STATES PATENT OFFICE
2,134,192
PIANO
‘Louis C. Kaullng, Kew Gardens, N. Y.
Application August 4, 193?, Serial Nou 157,340
'
2 Claim.
(Cl. 811-197)
This invention is directed to new and useful
improvements in low height upright pianos and
more particularly to such'types of pianos having
an overall height of about thirty-six inches.
5
The present trend of upright piano demand
has been for such pianos of much lower height
than those heretofore manufactured so as to
reduce the room space necessary for such pianos.
In reducing the height of the pianos the length
1.0 of the strings and the height or” the sounding
hoard must he reduced and the general mecha
nism of the piano which is operated by the keys
must be lowered. The shortening oi‘ the strings
and the reduction in size of the sounding board
sacri?ces quality in the resultant tone.
Heretofore, in the construction of such pianos
the piano plate, which is cast as a unit, ex“
and repetition is sacri?ced through the cable or
wire connections.
In upright pianos of usual height there is a
direct blow action between the inner end of the
piano key and the lever that sets in motion the
various springs and levers to move the damper
from the string, cause the hammer to strike
the string, and at once leave the string by means
of the escapement mechanism.
The primary object of this invention. is to pro
vicle an upright plane of low height in which
the length of the piano strings is materially
greater than those or": pianos of similar height
‘and in which the direct blow action is main
tainecl thus obtaining superior tone quality and.
?exibility
operation.
A further object is to provide such a clan-o
tends vertically in the piano and is provided at
that will stay in. time longer than present planes
its upper end with the tuning pins to which the
strings of the piano are secured.
‘of similar size.
A still further object is to provide such a piano Es.Q
with a cast piano plate adapted to receive the
The playing portion or the piano strings ere
tends from the hitch-pins at the hottom of the
plate to the iii-bar, spaced somewhat below the
upper end of the plate. From the vuhar to the
so tuning pin is the non-playing portion of the
piano strings which varies from. three to iive
inches in length.
In reducing the general height or" the piano
it is apparent that the keyboard cannot be low~
‘so cred proportionately. it must ‘be maintained in
a more or less standard plane to facilitate the
operation or playing of the piano.
‘
Because of this fact the modern low upright
pianos have been constructed with. what is known
85 in the trade as “drop action”. Plmis means that
the mechanism that is actuated by pressure on
the piano keys. to produce the musical tones has
been lowered to extend below the keyboard to
fit into the reduced height of the piano casing.
In dropping this mechanism below the plane
4%
of the keyboard to effect the so-called “drop ac
tion”. the keys have been operably connected
with the lower piano mechanism by means of
wires or small cables. Thus when a piano key
45 is depressed to strike a note the inner end of
playing portion of the piano strings in vertical
position and. the non-playing portions
sube
stantial horizontal position and secured to turn
ing pins vertically positioned in the upper por= 25
tion of the plate.
‘Another object is to provide such a plate have
ing a log cast integrally with
to support the
hey hottorn to prevent its sagging.
Still further objects and advantages will be
apparent from the following detailed descrip
tion.
In the drawing the ?gure shows a vertical
cross-section View partially broken away or the
working mechanism of a piano constructed. in 35
accordance with this invention.
In detail, 0 indicates a cast metal piano plate
comprising a vertical portion 2 that extends sub
stantially the height of the piano and a hori
zontally extending portion 3. Positioned through
the horizontal portion 3 of the piano plate is
a tuning pin 4 that extends into the tuning pin
block: Ila that is ?tted immediately under the
horizontal portion. Pressure her 5 and heads 6
and ‘l are secured to the top portion 3. The 45
V-bar 8 extends across the upper portion or the
the key is lifted and by means of a wire con
heating the inner end of the key with a lever,
vertical surface of- the plate adjacent the hori
sontal portion. Considerably below the V-bar
positioned below the keyboard the general piano
and cast integrally with the plate is a key bottom
supporting lug 9. The hammer operating mech
anism is shown generally and comprises the ham
60 mechanism is actuated through its various levers
and springs to cause the hammer to strike the
string and produce the desired note.
7
Aside from the fact that the tone quality is
sacri?ced because of the shortened piano strings,
65 this “drop action” is undesirable because power
mer HI, damper II, and the various levers and
springs which effect the operation of the ham
mer and its associated members.
Inasmuch as the operating mechanism affords 56
2
2,134,192
no part of this invention, further detailed de
scription of it is not made.
The key bottom I2 is shown supported at its
playing portions greater friction is produced be
inner end by the lug 8 and fulcrumed on the key
In this manner the piano maintains its tune much
longer than if there was a direct pull on the pins.
I claim:
bottom i2 is the key IS, the inner end ll of which
extends beneath and is in direct contact with
lever l5, so that upon depression of the outer end
of key I: the usual levers and springs are set in
motion to move the damper ll away from the
10 string, cause the hammer to strike the string
and release. The string i6 is shown extending
vertically from hitch-pin l'l over bridge l8 par
allel to the piano plate I over the V-bar 8 and
horizontally over the beads 6 and ‘I underneath
15 the pressure bar 5 and secured to the tuning pin 4.
The sounding board I 9 extends parallel to the
vertical portion 2 of the plate and supports the
bridge l8 that extends through the plate i. Thus
it will be clearly seen that only the playing por
tions of the strings are carried by the vertical
portion of the plate while the non-playing por
tions are led over the top parallel to the hori
zontal portion of the plate thus diminishing the
height of the plate. In this manner three to live
inches in vertical height of the piano can be
saved without shortening the strings and with
out necessitating the installation of the so-called
“drop action” mechanism.
Thus it can be clearly seen that by utilizing this
30 invention a thirty-six inch piano can be produced
that will have the tone and playing qualities of
a thirty-nine or forty inch piano 0! the old type.
Thus is obtained a popular small size piano with
out the undesirable characteristics of smaller
35 sounding board, shortened strings and "drop
action”.
Furthermore by placing the non-playing por
tions oi the piano strings at right angles to the
tween the strings, the V-bar and the beads thus
reducing the strain and pull on the tuning pins.
1. An upright piano oi.’ about three feet in
height comprising a piano plate having a ver
tical portion extending substantially the height
of the piano, a horizontal portion extending from
the upper end of the vertical portion, a grand
piano tuning pin block supported against the
under surface 0! said horizontal portion, tuning
pins extending through said horizontal portion
and into the pin block, a string supporting V-bar
positioned on the vertical portion of the plate in
substantially the same plane as the horizontal
portion, and strings extending substantially the
length of the vertical portion over the V-bar and
closely adjacent the horizontal portion to the tun 20
ing pins.
2. An upright piano of about three feet in
height comprising a cast metal piano plate hav
ing a vertical portion extending substantially the
height of the piano, a horizontal portion extend 25
ing from the upper end of the vertical portion,
a grand piano tuning pin block secured to the
under surface of said horizontal portion, tuning
pins extending through said horizontal portion
and into the pin block, a string supporting V-bar 30
positioned on the vertical portion of the plate in
substantially the same plane as the horizontal
portion and strings extending substantially the
length of the vertical portion over the V-bar and
closely adjacent the horizontal portion to the tun 35
ing pins.
LOUIS C. KAULING.
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