Yamaha G10C Bedienungsanleitung PDF herunterladen (Seite 4)

EP 0 585 798 B1

balance

pins,

and

capstan

button

projecting

from

a rear

end

portion

of each

key

1a.

Notes

are assigned

the

keys

1a,

and

a player

instructs the

upright piano

produce a

sound with

note

by depressing one

of the

keys

1a.

The

upright piano

further

comprises a plurality

key

action mechanisms 2 each associated with

one

the black and white

keys

1a,

a plurality

of hammer

as-

semblies 3

respectively

associated with the

key

action

mechanisms 2 and each connected with the associated

key

action mechanism

strings

vertically

stretched

and

respectively

associated with the

keys

and,

ac-

cordingly,

the hammer assemblies 3 and

a plurality

damper

assemblies

respectively

associated with the

strings

However,

Fig.

illustrates

only one

of the

keys

and the associated

key

action mechanism

hammer

assembly

string

and

damper assembly

and de-

scription

is focused

the

one

set

key, key

action

mechanism,

hammer

assembly,

the

string

and

damper

assembly.

In the

following description,

terms

"clock-

wise",

"counter

clockwise",

"right"

and "left"

are

deter-

mined

the

paper

where

figure

is drawn.

As will be better

seen

from

Fig.

the

key

action

mechanism 2

comprises a whippen/ whippen

heel

as-

sembly

2a held in

contact

with the

pair

capstan

but-

tons

1d,

a whippen flange

2b connected with

center

rail 6 and

swingably supporting

the

whippen/ whippen

heel

assembly

2a,

a jack flange

2c fixed

the

whippen/

whippen

heel

assembly

the

right

side of the

whip-

pen

flange

2b,

a jack

rotatably supported by

the

jack

flange

2c,

ajackspring2e urgingthe jack2d

in the

coun-

ter

clockwise

direction,

a damper

spoon

projecting

from the

whippen/ whippen

heel

assembly

the left

side of the

whippen flange

2b,

and

back check

pro-

jecting

from the

whippen/ whippen

heel

assembly

the

right

side of the

jack flange

2c. The back check is

fabricated from

back check wire

projecting

from the

whippen/ whippen

heel

assembly

2a,

back check

block fixed

the

upper

end of the back check wire and

back check felt bonded

the back check block

similar

that of

an ordinary

acoustic

piano.

The

key

action mechanism 2 further

comprises a

butt

flange

2h fixed

the

center

rail

butt 2i

rotatably

supported by

the butt

flange

2h,

butt skin

bonded

the lower surface of the

right

side

portion

of the butt

2i,

butt

spring

urging

the butt 2i in the clockwise direc-

tion,

and

a regulating

button 2m

downwardly projecting

from

a regulating

rail

opposing

relation

toe

the

jack

2d. The hammer

assembly

projects

from the

upper

end of the butt

2i,

and is rotatable

together

with

the butt 2i. The

jack

2d is held in

contact

with the butt

skin

2j,

and the

toe

of the

jack

2d is

spaced

apart

from

a regulating

button 2m. The

regulating

button 2m has

leather sheet where the

toe

of the

jack

2d is

brought

into

contact.

While the

whippen/ whippen

heel

assembly

2a is

rotating

in the

counter

clockwise direction due

the

key

1a,

not

shown in

Fig.

depressed,

the

jack

pushes

the butt 2i for

rotating

in the

counter

clockwise

direction,

and the

toe

of the

jack

2d is

getting

closer

the

regu-

lating

button 2m. When the

toe

of the

jack

2d is

brought

into

contact

with the

regulating

button

2m,

the

jack

starts to rotate

in the clockwise

direction,

and the

jack

2d is

escaped

from the butt skin

and kicks the butt 2i

that the hammer

assembly

3 rushes toward the

string

The

key

action mechanism 2 further

comprises a

catcher 2n

projecting

from the

right

side surface of the

butt

2i,

and

catcher skin 2o bonded

the

right

side

surface of the catcher 2n and

opposed

the back check

2g.

While the

key

staying

in the

rest

position,

the

catcher skin 2o is

spaced

apart

from the back check

2g.

However,

after the hammer

assembly

3 strikes the

string

the hammer

assembly

rebounds

the

string

and

the butt 2i

rotates

in the clockwise direction. The butt

spring

urges

the butt

2i,

and the catcher 2n and the

catcher skin 2o

are

moved toward the back check

2g.

The catcher skin 2o is

brought

into

contact

with the back

check

2g,

and the back check

sets

limit

the

ro-

tation of the butt 2i.

The

key

action mechanism 2 thus

arranged

ac-

companied

with

a repetition

mechanism

and the

rep-

etition mechanism 8

comprises a flange 2p

fixed

the

butt

2i,

a repetition

lever

2q supported by

the

flange 2p

and rotatable with

respect

a pin

supported by

the

flange 2p, a

cord 2s

projecting

from the

upper

surface

of the

flange 2p, a spring

coupled

between the cord

2s and the

repetition

lever

for

urging

the

repetition

lever

in the clockwise

direction,

a regulating screw

2u screwed into the

repetition

lever

2q on

the left side

of the

flange 2p

and

opposed

butt cloth 2v bonded

the butt

2i,

rod member 2w

snugly

received in

hole

formed in the

repetition

lever

2q on

the

right

side of the

flange 2p, a

block member 2x fixed

the rod member

2w,

and

a regulating screw 2y

screwed into the block

member 2x and held in

contact

with

a jack

cloth 2z bond-

the

jack

2d.

The

regulating screw 2y

is screwed into

out

the block member

2x,

and

changes

the distance be-

tween

the

jack

cloth 2z and the block member 2x. In oth-

words,

the

regulating screw 2y changes

the initial

an-

gle

of the

repetition

lever

2q.

If the

screw 2y

increases

the

distance,

the rod member 2w

pushes

the

repetition

lever

2q,

and

causes

the

repetition

lever

to rotate

around the

2r in the

counter

clockwise direction. On

the other

hand,

if the

screw 2y

is screwed into the block

member

2x,

the distance is

decreased,

and the

repeti-

tion lever

rotates

in the clockwise direction.

Thus,

the

regulating screw 2y

determines the initial

angular posi-

tion of the

repetition

lever

2q,

and, therefore,

regulates

the distance between the

semi-spherical portion

of the

repetition

lever

and the

top

surface of the back check

when the

escape

of the

jack

completes

but before

the rotation of the hammer

assembly

3 in the clockwise

direction. In other

words,

the

regulating screw 2y

deter-

mines the

amount

of backward motion of the hammer

1 2 3 4 5 6 7 8 9 ... 19 20

EP 0 585 798 B1 12
IP 0 585 798 B1 20

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