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Патент USA US2113045

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April 5, 1938.
.
w. EVANS '
PIANOFORTE
Filed Feb. 12, ‘1936
2,113,045
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April 5, 1938.
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w_ EVANS
2,113,045
PIANOFORTE
Filed Feb. 12, 1936
5 Sheets-Sheet 2
April 5, 1938.
w. EVANS
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2,113,045
PIANOFORTE
Filed Feb. 12, 1956
3 Sheets-Sheet 3
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2,113,045
Patented Apr. 5, 1938
UNITED STATES PATENT OFFICE
2,113,045
PIANOFORTE
Willie Evans, London, England
Application February 12, 1936, Serial No. 63,476
In Great Britain November 7, 1935
9 Claims.
(Cl. 84-—174)
This invention is for improvements in or re
back of the piano and an aperture above the key
lating to pianofortes of the kind in which the
top wall of the case of the piano does not extend
board as referred to above, a feature of the in
vention consists in that said front wall is inclined
in relation to the soundboard. This arrange
much above the level of the keyboard as is the
CR case in miniature upright pianos at present much
in vogue.
Objects of the present invention are to im
prove the tonal properties of the piano and to
provide a lid for the keyboard which is simple in
10 structure and neat in appearance.
In miniature upright pianos of the above kind
it is usual for the rear edge of the keyboard lid
to be hinged to the top of the casing and for a
partition to extend upwardly from the rear of
15 the keyboard to the top of the casing so as to
obscure the gap which would otherwise be pres
ent when the lid is open.
According to this invention, a miniature up
right piano of the kind ?rst referred to above is
characterized in that the keyboard lid is so
mounted that when it is moved into an open po
sition a gap is formed between it and the top wall
of the case. With this arrangement the sound
Waves can emerge without interference from the
25 top of the‘ piano.
A feature of the invention consists in that the
keyboard lid. is so mounted that when in an open
position its lower edge is located close to and
at the rear of the upper faces of the usually ex
30 posed parts of the keys and extends above the
top of the casing. It will be appreciated that
with this arrangement there is no necessity to
provide a partition such as is referred to above
since the lid ful?lls the purpose of such a par
35 tition. Preferably the keyboard lid is flat and
when in an open position extends in an inclined
manner to form a rack for music.
A constructional feature of the invention con
sists in that the sides of the piano casing extend
40 above the keyboard and in that said lid is piv
otally mounted between said sides so that the
axis of pivoting is parallel to and disposed away
from the rear edge of the lid and is located near
the top of said sides. Preferably when the lid
45 is in a closed position it lies in a horizontal plane
and has pivoted to its front edge a ?ange which
corresponds in width to the amount by which
said side walls project above the keyboard. The
purpose of pivotally' mounting the said flange
portion is to enable it to be swung into the same
plane as that of the other part of the lid when
the lid is open whereby it serves, together with
the lid, to form a part of the music rest.
In an upright piano having a front wall be
55 neath the keyboard and a soundboard at the
ment is found considerably to improve the tonal 5
properties of the piano as compared with the
usual arrangement in which the front wall be
neath the keyboard is vertical and parallel with
the soundboard at the back of the piano. This
is thought to be due to the fact that while in the 10
usual construction the parallel disposition of said
front wall and the soundboard causes the soimd
waves to be re?ected backwards and forwards be
tween these two parts and to a large extent to be
absorbed within the piano casing, in the con
struction according to the present invention,
since the front wall and the soundboard are in
clined in relation to one another, the sound
waves will ultimately be re?ected out of the said
aperture. Preferably the said front wall is so 20
inclined that its upper edge is further from the
soundboard than is the lower edge. A suitable
angle for the inclination is found to be from 10°
to 15° to the vertical.
In an alternative form of construction, the
keyboard lid is so mounted as to be movable
bodily upwardly and rearwardly away from the
keyboard as distinct from hinging about a ?xed
axis; for example, the lid may be so mounted
that its rearward edge may be moved upwardly 30
to a greater extent than the forward edge while
the forward edge may be moved rearwardly to a
greater extent than the rearward edge. Thus
the lid, when in an open position, may be ar
ranged to have an inclination suitable for sup
porting music. For this purpose the lid is pref
erably flat with or without a ?ange at its for
ward edge and when in a closed position may be
inclined upwardly and rearwardly from said for
ward edge.
40
A feature of the invention consists in attach
ing a supporting ledge to a ?xed part of the
piano at the rear of the exposed parts of the keys
which ledge is obscured by said lid when it is
closed.
A constructional feature of the invention con
sists in that the lid is constrained to move in the
manner referred to above by a pin-and-slot con
nection between it and a side of the piano.
The following is a description of two alterna
tive constructions of miniature upright pianos,
reference being made to the accompanying
drawings, in which:
Figure 1 is a part side elevation and part sec 55
2
2,113,045
tion of the piano on line I—I of Fig. 2, showing
the lid in an open position,
Figure 2 is a front elevation showing the lid
closed,
Figure 3 is a section of the upper part of the
piano similar to Figure 1 showing the lid partly
raised.
Figure 4 is a similar view to Figure 3 showing
the lid closed,
Figure 5 is a section on the line 5-5 of Figure
3 but to a larger scale, and
Figure 6 is a section through an alternative
form of construction showing the lid open in
full lines and the lid closed in chain lines.
Like reference numerals refer to like parts
15
into contact with the ramp 25 whereby the lid is
caused to assume a steeper inclination and its
rear edge is withdrawn upwardly away fromv the
edge of the wall I4. Eventually the peg will
reach the upper end of the part 30 of the slot Ch
and the ?ange I I of the lid will have passed over
the top of the ledge 21. The peg, by a down
ward movement of the handles 3|, is lowered
to the bottom of the slot part 30 and the ?ange
will pass behind the ledge 21. In order to pre 10
vent the lid from being accidentally tilted for
ward, when. in this position, a recess 32 is formed
in the front part of the ramp 25, which recess
is arranged to engage a pin 33 ?xed in the side
wall of the casing when the peg is lowered into
throughout the drawings.
the part 30 of the slot.
As will be seen from Figures 1 and 2, the lid
I0 is ?at and has a downwardly-extending ?ange
I I at its forward edge. The lid, when in a closed
is so positioned in relation to the slot part 30
20 position, is disposed between the side walls I2
of the piano and assumes an inclined position.
The upper parts I3 of the side walls are so
shaped as to lie parallel with and nearly flush
with the lid when the latter is closed. The back
25 wall of the piano is provided with an upper hori
zontal extension or wall I4 to the rear of the lid.
The sides I2 extend forwardly on each side of
the keyboard I5, which latter is provided with
a front piece I6 on which the ?ange II of the lid
30 rests when it is closed, as will be seen from Fig
ure 4. Secured on each side of the lid in the
Furthermore, the pin
that the lower edge of the lid is just prevented
from coming into contact with the rear face. of
the ledge 27 whereby rubbing of the lid is pre
vented. The lid is arranged to be an easy slid
ing ?t between the side walls I2 and in order
to provide a dust-tight joint a strip of felt 34
is inset into each side edge of the lid and pro
J'ects therefrom so as to engage the inner faces
of the side walls, as shown in Figure 5.
It will be seen from Figure 1 that when the
lid I0 is open a substantial space 250. is left
between it and the forward edge of the top wall
I4. This space is found substantially to im
prove the tonal properties of the piano. Fur
region of the ?ange II is a metal pin or peg
I‘! as best seen from Figure 5. The metal pin
has formed integral therewith a metal plate IS
35 which is spaced away from the underside of the
thermore, when viewed from the front, the lid
lid by a packing piece I9. The plate and the
packing piece are secured to the lid by wood
necessary.
Mounted across the back of the piano is the
usual soundboard 6 while beneath the keyboard
at the front of the casing is a front wall 8 which
is carried by lower frame members "I.
It will be noted that the front wall is inclined
in relation to the soundboard so that its upper
screws 20. To the inside face of each side wall
I2 there is secured above the keyboard a sheet
4.0 of wood or metal H in which is formed a slot
22 for engagement by the aforesaid pin. Secured
also to the inside face of each side wall near the
upper horizontal wall I4 is a roller 23 which en
gages the inside face of the lid. This roller 23,
45 together with the slots 22 and the pins I'l, con
stitutes guide means by which the lid is con
strained to move and by which it is located in its
open position. The roller is so disposed that
when the lid is closed its upper edge 24 is spaced
50 a short distance away from the edge of the wall
I4. Secured to the inside face of the lid at
each end thereof is a ramp 25 which is brought
into engagement with the roller 23 when the lid
serves to obscure the internal parts above the’
keyboard which would otherwise be seen and
thus renders the use of a separate partition. un- :
edge is further from the soundboard than is the
lower edge. The angle of inclination to the ver
tical may be from 10° to 15°. The wall is remov
ably mounted on one of the cross members ‘I
by dowel connections: 5 and its upper edge is
held in position by cleats 4 pivotally secured to
the underside of the keyboard I5.
Many modi?cations may be made to the above
construction. For example, instead of a music
supporting ledge 21 being provided, the handles
during which time the peg I ‘I moves to the upper
3| on. the outside of the lid could be replaced by
a single rail towards the centre of the lid which
would operate as a music support when the lid
is open. Furthermore, the same kind of move
ment for the lid could be provided by means other
than a pin-and-socket connection. For exam
ple, there might be pivotally secured to each side
of the lid, towards the rear edge thereof, a lever 60
arm which is itself pivotally secured to a ?xed
part of the piano so» that the two lever arms, to
gether with the lid, may be swung upwardly and
rearwardly in the operation of opening the lid.
The lid may be retained in an open position by
a music-supporting ledge as already described
extremity of the downwardly-extending part 28
above.
is moved from a closed to an open position. Ex
55 tending between the two side walls I2 of the
casing and towards the rear part of the exposed
portion of the keys 26 is a ledge 27.
It will be noted that the slot 22 is provided
towards its forward end with a downwardly-ex
60 tending portion 28; there is also a slight in?ec
tion 29 towards the middle of the slot and there
is a downwardly-extending part 30 towards the
rear end of the slot.
The lid is provided across
its width with, two manipulating handles. 3|.
65 To open the lid the handles are raised upwardly
of the slot. The upper part of the lid pivots on
the roller 23 but the end of the lid does not con
70 tact with the wall I4 by reason of the provision
of the small gap 24a between these two- parts.
The handles 3| are then pushed rearwardly and
upwardly and the peg slides along the inclined
portion of the slot while the inside face of the
lid moves over said roller 23 which then comes
In an alternative form of construction shown
in Figure 6 the lid is formed in two parts 40
and 4|. When in a closed position, as shown
in chain lines, the part 40 lies in a horizontal
plane and forms a continuation of the top wall
I4 of the piano casing. The top wall is ?xed
to the back 43 of the piano. The other portion
of the lid 4| is pivotally attached to the part 75
3
2,118,045
10 ‘by ‘a metal plate 444' secured on each side of
vvide between them’a‘tapering space communicat
for example \by wood screws '9, which plate car
ries a ‘pivot pin 45 arranged 'to engage suitable
holes in the ends of the part 41. ‘The lid is piv
‘otally mounted "between the ‘two side walls 12
'ing with said gap and having ‘its larger dimen
‘of the ‘piano. ‘The ‘pivotal mounting comprises
a small metal plate ‘41 secured oneach side of
the part Ill of the lid at some distance away
10
"front ‘wall and soundboard ‘are arranged ‘to pro
‘the ‘part ill! towards ‘the forward edge ‘thereof,
from the rear edge ‘thereof. “Each plate carries
a pivot 'pin 48 which is arranged to ‘engage an
upwardly-extending slot 49 formed vin another
metal plate '50 which is (inset in the side ‘walls l2
\of 5the piano.’ It will be appreciated that with
15 ‘this arrangement the whole lid, ‘if desired, may
"be completely ‘removed from the piano. Extend
ing between the two side walls I2 is a wooden
ledge 5!, the rear face '2 of which ‘forms a stop
for the lower part of the lid when it is in an
‘open ‘position, as shown ‘in Figure 6, and is so
disposed that the lid assumes an‘angle of inclina
"tion suitable ‘for locating the music. The upper
‘face of the ledge is shaped at ‘53 to provide a
‘support for the music. Both the rearward edge
‘of the lid and the forward edge of the top wall
sion
uppermost.
I
v
'2. An upright piano comprising side ‘walls, a
‘horizontal wall between the upper ends of the
side walls, a keyboard extending between said
‘side walls beneath said horizontal wall, a key
board-lid adapted when closed to cover both the
‘keyboard and the gap between the keyboard and
the side walls and horizontal ‘wall, guide means
‘for constraining the front part of the lid to move
in a backwards and forwards direction, guide
means for vconstraining the rear part of the lid
‘to move man up and down direction, stop means 15
for locating the lid in an open'position spaced
away from ‘the forward edge of ‘the horizontal
v‘wall and at an inclination suitable for locating
the music, a soundboard disposed at the rear
of the keyboard, and a flat front wall disposed
vbeneath the keyboard and between the side walls,
‘which front wall and soundboard are arranged
to provide between them a tapering space com
municating with said gap and having its larger
dimension uppermost.
"25
“of the casing-are chamfered at 62 vand 54,
3. An upright piano comprising side walls, a
It will be noted that when the lid is in an
open position, a gap ‘60 is left between the back
horizontal wall between the upper ends of the
side walls, a keyboard extending between said
:side walls ‘beneath said horizontal wall, a. key
board lid adapted when closed to cover both
respectively.
30 of the lid and the forward edge of the top wall
1'4 and this gap ‘is found to improve ‘the vtonal
properties of the piano since it permits the sound~
*waves to ‘issue without obstruction. Also it ‘will
‘be ‘noted that the lower edge of the lid is located
close 1to the upper surfaces of the usually exposed
parts of the keys 3.
_
It ‘will be ‘noted ‘that at the point of junction
the keyboard and the ‘gap between the keyboard
and the side walls and horizontal wall, guide
means for constraining the front part of the lid
‘to move in a backwards and‘forwards direction,
"guide means for constraining the rear part of 35
the lid to ‘move "in an up and down direction,
‘stop means for locating the lid in an open posi
between the parts #0 and 4| ofithe lid, the vformer
tion spaced away from the forward edge of the
part is provided with a ‘right-angled recess 6|.
40 'The walls 155 and E56 ‘serve ‘to ‘locate ‘the part II
in its limiting position. The ‘wall 56 is of such
a length that when the part ii ‘is ‘in the closed
position, ‘a vlip 51 is provided whereby the lid
may be raised. The outer end of the part 4| is
45 suitably shaped to engage the front wall I6 of
horizontal wall and at an inclination suitable
'for locating the music and a ?xed ledge ‘for sup
the keyboard. Extending from beneath the key
board is a sloping front wall 8 as described with
reference to the construction shown in Figures
1 to 5. This sloping front wall, together with
50 the gap 60 between the lid and the top wall’ [4, is
found to enhance the tonal properties of the pi
ano.
It will be appreciated that many modi?cations
may be made to details of the mounting of the
lid which retain such features of this invention
as the provision of an opening between the lid
and piano casing when the lid is open and the
use of the inside face of the lid as a music-rest.
I claim:
60
1. An upright piano comprising side walls, a
horizontal wall between the upper ends of the
side walls, a keyboard extending between said
side walls beneath said horizontal wall, a key
board lid adapted when closed to cover both the
05 keyboard and the gap between the keyboard and
the side walls and horizontal wall, guide means
for constraining the front part of the lid to move
in a backwards and forwards direction, guide
means for constraining the rear part of the lid to
70 move in an up and down direction, stop means
for locating the lid in an open position spaced
away from the forward edge of the horizontal
wall, a soundboard disposed at the rear of the
keyboard, and a ?at front wall disposed beneath
the keyboard and between the side walls, which
porting the bottom edges "of the music, 'which
ledge ‘is disposed at the rear of the exposed parts
of the vkeys, la soundboard disposed at the rear
of the keyboard, and ‘a flat front wall disposed
beneath the keyboard "and between'the side walls,
which front wall and soundboard are arranged
to provide between them a tapering space com
municating with said gap and having its larger
dimension uppermost.
4. An upright piano comprising side walls, a 50
horizontal wall between the upper ends of the
side walls, a keyboard extending between said
side walls beneath said horizontal wall, a key
board lid adapted, when closed, to cover both the
keyboard and the gap between the keyboard, the 55
side walls and the horizontal wall, a guideway
associated with each side wall, a projection on
each side of the lid towards the forward edge
thereof, which projections are adapted to en
gage said guideways, a guide member ?xed to 60
each side wall above and to the rear of the guide
ways and adapted to engage the inside face of
the lid, which guideways and guide members to
gether constrain the forward edge of the lid to
move backwards and forwards and the rearward 65
edge of the lid up and down and to locate the lid
in an open position spaced away from the for
ward edge of the horizontal wall, a soundboard
disposed to the rear of the keyboard, and a ?at
front wall disposed beneath the keyboard and
between the side walls, which front wall and
soundboard are arranged to provide between
them a tapering space communicating with said
gap and having its larger dimension uppermost.
5. An upright piano comprising side walls, a
2,1 13,045
"horizontal wall between the upper ends of the
side walls, a keyboard extending between said
side walls beneath said horizontal wall, a key
board lid adapted, when closed, to cover both
the keyboard and the gap between the keyboard,
the side walls and the horizontal wall, a pivotal
mounting for said lid arranged with the axis of
the pivoting parallel to the rear edge of the lid
above the keyboard and at a distance away from
10 the rear edge of the lid slightly less than the dis
tance from the keyboard, stop means for locating
the lid in an open position at a distance away
from the forward edge of the horizontal wall, a
soundboard disposed to the rear of the keyboard,
15 and a ?at front wall disposed beneath the key
board and between the side walls, which front
wall and soundboard are arranged to provide be
tween them a tapering space communicating
with said gap and having its larger dimension
20
uppermost.
6. An upright piano comprising side walls, a
horizontal wall between the upper ends of the
side walls, a keyboard extending between said
side walls beneath said horizontal wall, a key
25 board lid adapted, when closed, to cover both
the keyboard and the gap between the keyboard,
the side walls and the horizontal wall, a pivotal
mounting for said lid arranged with the axis of
pivoting parallel to the rear edge of the lid above
30 the keyboard and at a distance away from the
rear edge of the lid slightly less than the distance
from the keyboard, stop means for locating the
lid in an open position at a distance away from.
the forward edge of the horizontal wall, a ?anged
35 member pivotally attached to the forward edge
of the lid and adapted to engage the forward
part of the keyboard when the lid is closed so as
to locate the lid in a horizontal position, a sound
board disposed to the rear of the keyboard, and
a ?at front wall disposed beneath the keyboard
and between the side Walls, which front wall and
soundboard are arranged to provide between
them a tapering space communicating with said
gap and having its larger dimension uppermost.
7. An upright piano comprising side walls, a
vkeyboard extending between said side walls, a
keyboard lid adapted when open to provide to
gether with said side walls an upwardly facing
opening and when closed to cover said opening,
guide means adapted to locate said lid in an open
position, a soundboard disposed to the rear of
the keyboard, a front wall disposed beneath the
keyboard and between the side walls which front
walls and soundboard are arranged to provide be
tween them a tapering space having its larger 10
dimension uppermost and directed towards said
upwardly facing opening.
8. An upright piano comprising side walls, a
horizontal wall between the upper ends of said
side walls, a keyboard extending between said 15
side walls beneath said horizontal wall, a key
board lid adapted when open to provide between
it the side walls and the horizontal wall an up
wardly facing opening and when closed adapted
to cover both the keyboard and said opening,
guide means adapted to locate said lid in an open
position, a soundboard disposed to the rear of the
keyboard, and a front wall disposed beneath the
keyboard and between the side walls, which front
wall and soundboard are arranged to provide be 25
tween them a tapering space having its larger
dimension uppermost and directed towards said
upwardly facing opening.
9. A miniature upright piano comprising side
walls, a horizontal wall between the upper end of 30
the side walls, a keyboard extending between said
side walls beneath said horizontal wall, a key
board lid adapted when open to extend above
said horizontal wall and together with said side
walls and the horizontal wall to provide an up 35
wardly facing opening, and when closed to cover
said keyboard and said opening, a soundboard
disposed to the rear of the keyboard and a front
wall disposed beneath the keyboard and between
the side walls, which front wall and soundboard
are arranged to provide between them a taper
ing space directed towards said upwardly facing
opening and having its larger dimension upper
most.
WILLIE EVANS.
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