CA1043141A - Apparatus for use when playing a stringed instrument - Google Patents
Apparatus for use when playing a stringed instrumentInfo
- Publication number
- CA1043141A CA1043141A CA234,171A CA234171A CA1043141A CA 1043141 A CA1043141 A CA 1043141A CA 234171 A CA234171 A CA 234171A CA 1043141 A CA1043141 A CA 1043141A
- Authority
- CA
- Canada
- Prior art keywords
- bellows
- stringed instrument
- frame
- pushbutton
- accordance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
- G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
- G10D3/06—Necks; Fingerboards, e.g. fret boards
- G10D3/08—Fingerboards in the form of keyboards
Abstract
ABSTRACT OF THE DISCLOSURE
APPARATUS FOR EXERTING PRESSURE ON SEVERAL
STRINGS OF A STRINGED INSTRUMENT SIMULTANEOUSLY BY
OPERATION OF A PUSHBUTTON WHICH TRANSMITS EITHER HYDRAU-LICALLY OR PNEUMATICALLY OR BY FLEXIBLE CABLE THE TOUCH
FROM A SINGLE FINGER, HENCE A SINGLE PUSHBUTTON, TO
SEVERAL STRINGS OF A STRINGED INSTRUMENT FOR SUCH PURPOSES
AS THE PLAYING OF A CHORD.
APPARATUS FOR EXERTING PRESSURE ON SEVERAL
STRINGS OF A STRINGED INSTRUMENT SIMULTANEOUSLY BY
OPERATION OF A PUSHBUTTON WHICH TRANSMITS EITHER HYDRAU-LICALLY OR PNEUMATICALLY OR BY FLEXIBLE CABLE THE TOUCH
FROM A SINGLE FINGER, HENCE A SINGLE PUSHBUTTON, TO
SEVERAL STRINGS OF A STRINGED INSTRUMENT FOR SUCH PURPOSES
AS THE PLAYING OF A CHORD.
Description
` 1043141 BACI~GROU~ OF THE INVENTION
The present invention is related to an apparatus that simplifies the playing of a stringed instrument, especially an instrument as the guitar and more particularly the touch as applied to several strings simultaneously on such a stringed instrument. At present, the study of stringed , ins~ruments, especially the guitar has been rendered difficult ~ because the fingers must have the agility and strength in-~ order to carry out the manipulation of touching different `i 10 parts forming the guitar simultaneously. To obtain the different harmonies of the notes of the musical scale it is - necessary at times to place the fingers in difficult positions and to press with sufficient force on the strings of the guitar in order to obtain sound of the harmony of the desired j 15 notes. This in itself makes the playing of such instruments i difficult and may discourage the students.
SUMMARY OF THE INVENTION
The apparatus of the present invention solves problems which are now present in the playing of stringed instruments since with its construction and the elements which form the apparatus, it is possible to achieve any touch that corresponds to a musical harmony merely by pressing a button with a finger, without having to place several fingers in a difficult position and without having to press the strings with such force that a~ times will cause callouses to appear.
, ~ . . .
. ~ ',.
, . ' . ' - ' , ' ' ' . -, ' , ' . ' ' : , ' ~ ' . . : .
` 1043~41 - It is an object of the invention to transmit the pressure from a single finger to several predetermined strings for the particular harmony desired.
It is a further object of this inveh~ion to transmit the pressure of a single finger by means of several cables to .
~` a number of strings.
., .
It is a further object of the present invention to achieve the transmission of the finger pressure through hydraulic . ........................................... .
; or pneumatic means utilizing bellows and connecting conduits.
BRIEF DESCRIPTION OF THE DRAWINGS
~ The above and other objects and advantages of the - invention will become apparent upon full consideration of the following detailed description and accompanying drawings in which:
~ Fig. 1 illustrates with a partially broken-away -i perspec~ive view the device of the present invention mounted on the neck of an instrument such as a guitar;
Fig. 2 is a section view transversely of the apparatus ~, of Fig. 1 and along line 2-2 of Fig. l;
Fig. 3 illustrates with a partially broken-away perspective view another embodiment of the device of the present invention also mounted on the neck of an instrument such as a guitar; and , ...................................................................... . .
~ Fig. 4 illustrates a section view along line 4~4 of the `S,1 embodiment of Fig. 3.
DESCRIPTION OF THE`PREFERRED EMBODIMENTS `
.
' Referring first to Figs. 1 and 2, there is shown the ' neck 10 of a stringed instrument that may be the type such as a , :j , . -guitar with six strings 24.
In the said figures, a button 11 is marked with the letter C that corresponds as is known by those who are familiar with music, to the note Do; the button 12 being marked with the ~' ; ''':, 104;~141 lètter D which corresponds to the musical note Re and other buttons shown thereon corresponding to the musi¢al notes E, F, G, A, B marked thereon. In the figures, button 11 mounted on rigid shaft 13 is shown in the pressed down position as caused by a finger of the musician which presses against disk 14 mounted on shaft 13 and thereby in turn causing disk 14 to press on and compress springs 17 mounted on the top of flexible cables 15 which -pass through sleeves 16 and upper deck 18 in cover 19 of the present apparatus. The neck 10 of the instrument which is shown ., as a sectioned portion 20 in Fig. 2 has a lower deck 21 inside ~
, . .
cover 19 against which the sleeves 16 press and through which the flexible cables have their lower ends 22 extending. On the lower ends 22 of the flexible cables there are plugs or legs 23 of rubber or similar material which press against strings 24 when ; these plugs 23 are in lowered position as shown in the case of ;~ three of them in Figs. 1 and 2 which are seen pressing against ~ strings 24 specifically the second, fourth and fifth strings from -, the left so as to produce chord C.
~, Upon release of the button 11, the button will auto-,..................................................................... ..
matically return to the raised or at rest position such as is illustrated in the case of button 12. Button 11 will raise it-self due to the release of compression applied to springs 1~ ~, thereby raising disk 14 and exerting a pull through the top ends 15 of the flexible cables attached to disk 14 and transmitting this motion to the lower ends 22 of the flexible cable and in , ' turn raising plugs 23 off of strings 24. ;
The cover 19 is attached to neck 10 or 20 by means ~-of bolts 26 extending from opposite sides of cover 19 held in slots 27 of fastening arms 25 by the opposing action from screw 29 against a rubber pad 28 between neck 20 and fastening arms ~ -25 arched below neck 20.
.
.' ~ :.
;
:
- - : : ,. .
, . ~, .: : ~ : , :, ~
In the embodiment shown in Figs. 3 and 4 similar parts are designated by similar numerals as in the case of neck 10 of the stringed instrument shown in Fig. 4 as cross-section 20 with strings 24 and the cover 19 of the apparatus of the present invention held to neck 10 or 20 by means of fastening arms 25 connected to casing 19 by means of bolts 26 on opposite sides of casing 19 held in slots 27 on fastening arms 25. Again button 11 is shown in a pressed-down position designated for the playing of the chord C.
Upon applying pressure to button 11, the rigid shaft 13 moves downward and moves disk 14 attached thereto downward so as to press bellows 35 against the action of a spring (not shown) inside said bellows 35. The spring therein and bellows 35 move from the position shown for bellows 35' to the position of bellows 35 and are compressed by disk 14 against upper deck 18 to which it is also fixed. The pressure of a fluid, either a gas or a liquid, is transmitted either pneumatically or ~ydrostatically, respectively, through conduits 36 to lower bellows 37. In the case of-chord~C, there are three lower bellows-37~connected through three individual conduits 36 to the single bellows 35. These three bellows 37 are-connected to lower deck 21 as is the case with all other lower bellows such as bellows 37' shown compressed or at rest condition. Also bellows 37 connected for operation ~
`~A ' by button C are placed so as to make contact with those of strings -;
, 24 in the second, fourth and fifth positions from the left.
j! When pressure on button 11 is released and is returned to the rest position shown by button 12, the disk 14 is raised :
through the action of springs internal to beLlows 35 so as to ~ -return the bellows to the position shown by bellows 35'. Although the spring action is exerted against upper deck 18, the hermetic sealing of bellows 35 is made through conduits 36 and through deck 21 to bellows 37,37' with the reaction of the lower bellows :
. 104;~41 ~
37,37' being applied against lower deck 21 and thereby causing ~ ~:
. them to contact strings 24 when in the extended position depicted ~' by bellows 37. The return of bellows 35 to the exbiended position A`i denoted by 35' removes the fluid from bellows 37 thereby returning them to the compressed position shown by bellows 37' and in turn releases the pressure from strings 24. Other buttons may then be pressed down depending upon the harmony or chord on the : . . .
musical scale to be produced.
. It is apparent that such a device of the present 'l 10 invention facilitates the learning and playing of a musical , .
stringed instrument, for example, such as the guitar.
.~, It will be obvious to those skilled in the art that .-~ : .
f. various changes may be made without departing from the scope :~ of the invention and the invention is not to be considered limited ,; to what is shown in the drawings and described in the specification.
.. . . ..
.,~ ~,7,-. , ' ~
:' ... .
The present invention is related to an apparatus that simplifies the playing of a stringed instrument, especially an instrument as the guitar and more particularly the touch as applied to several strings simultaneously on such a stringed instrument. At present, the study of stringed , ins~ruments, especially the guitar has been rendered difficult ~ because the fingers must have the agility and strength in-~ order to carry out the manipulation of touching different `i 10 parts forming the guitar simultaneously. To obtain the different harmonies of the notes of the musical scale it is - necessary at times to place the fingers in difficult positions and to press with sufficient force on the strings of the guitar in order to obtain sound of the harmony of the desired j 15 notes. This in itself makes the playing of such instruments i difficult and may discourage the students.
SUMMARY OF THE INVENTION
The apparatus of the present invention solves problems which are now present in the playing of stringed instruments since with its construction and the elements which form the apparatus, it is possible to achieve any touch that corresponds to a musical harmony merely by pressing a button with a finger, without having to place several fingers in a difficult position and without having to press the strings with such force that a~ times will cause callouses to appear.
, ~ . . .
. ~ ',.
, . ' . ' - ' , ' ' ' . -, ' , ' . ' ' : , ' ~ ' . . : .
` 1043~41 - It is an object of the invention to transmit the pressure from a single finger to several predetermined strings for the particular harmony desired.
It is a further object of this inveh~ion to transmit the pressure of a single finger by means of several cables to .
~` a number of strings.
., .
It is a further object of the present invention to achieve the transmission of the finger pressure through hydraulic . ........................................... .
; or pneumatic means utilizing bellows and connecting conduits.
BRIEF DESCRIPTION OF THE DRAWINGS
~ The above and other objects and advantages of the - invention will become apparent upon full consideration of the following detailed description and accompanying drawings in which:
~ Fig. 1 illustrates with a partially broken-away -i perspec~ive view the device of the present invention mounted on the neck of an instrument such as a guitar;
Fig. 2 is a section view transversely of the apparatus ~, of Fig. 1 and along line 2-2 of Fig. l;
Fig. 3 illustrates with a partially broken-away perspective view another embodiment of the device of the present invention also mounted on the neck of an instrument such as a guitar; and , ...................................................................... . .
~ Fig. 4 illustrates a section view along line 4~4 of the `S,1 embodiment of Fig. 3.
DESCRIPTION OF THE`PREFERRED EMBODIMENTS `
.
' Referring first to Figs. 1 and 2, there is shown the ' neck 10 of a stringed instrument that may be the type such as a , :j , . -guitar with six strings 24.
In the said figures, a button 11 is marked with the letter C that corresponds as is known by those who are familiar with music, to the note Do; the button 12 being marked with the ~' ; ''':, 104;~141 lètter D which corresponds to the musical note Re and other buttons shown thereon corresponding to the musi¢al notes E, F, G, A, B marked thereon. In the figures, button 11 mounted on rigid shaft 13 is shown in the pressed down position as caused by a finger of the musician which presses against disk 14 mounted on shaft 13 and thereby in turn causing disk 14 to press on and compress springs 17 mounted on the top of flexible cables 15 which -pass through sleeves 16 and upper deck 18 in cover 19 of the present apparatus. The neck 10 of the instrument which is shown ., as a sectioned portion 20 in Fig. 2 has a lower deck 21 inside ~
, . .
cover 19 against which the sleeves 16 press and through which the flexible cables have their lower ends 22 extending. On the lower ends 22 of the flexible cables there are plugs or legs 23 of rubber or similar material which press against strings 24 when ; these plugs 23 are in lowered position as shown in the case of ;~ three of them in Figs. 1 and 2 which are seen pressing against ~ strings 24 specifically the second, fourth and fifth strings from -, the left so as to produce chord C.
~, Upon release of the button 11, the button will auto-,..................................................................... ..
matically return to the raised or at rest position such as is illustrated in the case of button 12. Button 11 will raise it-self due to the release of compression applied to springs 1~ ~, thereby raising disk 14 and exerting a pull through the top ends 15 of the flexible cables attached to disk 14 and transmitting this motion to the lower ends 22 of the flexible cable and in , ' turn raising plugs 23 off of strings 24. ;
The cover 19 is attached to neck 10 or 20 by means ~-of bolts 26 extending from opposite sides of cover 19 held in slots 27 of fastening arms 25 by the opposing action from screw 29 against a rubber pad 28 between neck 20 and fastening arms ~ -25 arched below neck 20.
.
.' ~ :.
;
:
- - : : ,. .
, . ~, .: : ~ : , :, ~
In the embodiment shown in Figs. 3 and 4 similar parts are designated by similar numerals as in the case of neck 10 of the stringed instrument shown in Fig. 4 as cross-section 20 with strings 24 and the cover 19 of the apparatus of the present invention held to neck 10 or 20 by means of fastening arms 25 connected to casing 19 by means of bolts 26 on opposite sides of casing 19 held in slots 27 on fastening arms 25. Again button 11 is shown in a pressed-down position designated for the playing of the chord C.
Upon applying pressure to button 11, the rigid shaft 13 moves downward and moves disk 14 attached thereto downward so as to press bellows 35 against the action of a spring (not shown) inside said bellows 35. The spring therein and bellows 35 move from the position shown for bellows 35' to the position of bellows 35 and are compressed by disk 14 against upper deck 18 to which it is also fixed. The pressure of a fluid, either a gas or a liquid, is transmitted either pneumatically or ~ydrostatically, respectively, through conduits 36 to lower bellows 37. In the case of-chord~C, there are three lower bellows-37~connected through three individual conduits 36 to the single bellows 35. These three bellows 37 are-connected to lower deck 21 as is the case with all other lower bellows such as bellows 37' shown compressed or at rest condition. Also bellows 37 connected for operation ~
`~A ' by button C are placed so as to make contact with those of strings -;
, 24 in the second, fourth and fifth positions from the left.
j! When pressure on button 11 is released and is returned to the rest position shown by button 12, the disk 14 is raised :
through the action of springs internal to beLlows 35 so as to ~ -return the bellows to the position shown by bellows 35'. Although the spring action is exerted against upper deck 18, the hermetic sealing of bellows 35 is made through conduits 36 and through deck 21 to bellows 37,37' with the reaction of the lower bellows :
. 104;~41 ~
37,37' being applied against lower deck 21 and thereby causing ~ ~:
. them to contact strings 24 when in the extended position depicted ~' by bellows 37. The return of bellows 35 to the exbiended position A`i denoted by 35' removes the fluid from bellows 37 thereby returning them to the compressed position shown by bellows 37' and in turn releases the pressure from strings 24. Other buttons may then be pressed down depending upon the harmony or chord on the : . . .
musical scale to be produced.
. It is apparent that such a device of the present 'l 10 invention facilitates the learning and playing of a musical , .
stringed instrument, for example, such as the guitar.
.~, It will be obvious to those skilled in the art that .-~ : .
f. various changes may be made without departing from the scope :~ of the invention and the invention is not to be considered limited ,; to what is shown in the drawings and described in the specification.
.. . . ..
.,~ ~,7,-. , ' ~
:' ... .
Claims (6)
1. Apparatus for use with a stringed instrument comprising:
a frame supported on the stringed instrument;
means to support said frame on the stringed instrument including means to adjust the compression of said frame against the stringed instrument;
said frame having upper, middle, and lower surfaces supported over a stringed portion of the stringed instrument;
a plurality of pushbutton means each adapted to receive the pressure applied to the stringed instrument by a single finger and designating a chord to be played, said pushbutton means positioned by said upper surface, and said middle surface in opposition to the force on said pushbutton means applied by the finger;
a plurality of hermetically sealed closed systems supported by said frame;
each of said hermetically sealed systems including a first bellows connected to each of said pushbutton means having one end attached for movement with said pushbutton means, a plurality of second bellows each smaller than said first bellows and formed to be in a contracted state when at rest position, and conduit means for fluid pressure transmission connecting each of said second bellows to said first bellows;
said lower surface of said frame supporting said second bellows over the strings of the stringed instrument positioned so that each of said second bellows presses against a string when said second bellows is in an expanded state;
and spring means to hold said first bellows in an expanded state in its rest position and oppose a compressing force from said pushbutton means.
a frame supported on the stringed instrument;
means to support said frame on the stringed instrument including means to adjust the compression of said frame against the stringed instrument;
said frame having upper, middle, and lower surfaces supported over a stringed portion of the stringed instrument;
a plurality of pushbutton means each adapted to receive the pressure applied to the stringed instrument by a single finger and designating a chord to be played, said pushbutton means positioned by said upper surface, and said middle surface in opposition to the force on said pushbutton means applied by the finger;
a plurality of hermetically sealed closed systems supported by said frame;
each of said hermetically sealed systems including a first bellows connected to each of said pushbutton means having one end attached for movement with said pushbutton means, a plurality of second bellows each smaller than said first bellows and formed to be in a contracted state when at rest position, and conduit means for fluid pressure transmission connecting each of said second bellows to said first bellows;
said lower surface of said frame supporting said second bellows over the strings of the stringed instrument positioned so that each of said second bellows presses against a string when said second bellows is in an expanded state;
and spring means to hold said first bellows in an expanded state in its rest position and oppose a compressing force from said pushbutton means.
2. Apparatus in accordance with claim 1, further characterized by:
said conduit means being of flexible material.
said conduit means being of flexible material.
3. Apparatus in accordance with claim 1, further characterized by:
said second bellows being of relatively soft rubber-like type of material.
said second bellows being of relatively soft rubber-like type of material.
4. Apparatus in accordance with claim 1, further characterized by:
said second bellows having an end opposite the end contacting the string of the stringed instrument pressed against said lower surface at least when said second bellows is in an extended position.
said second bellows having an end opposite the end contacting the string of the stringed instrument pressed against said lower surface at least when said second bellows is in an extended position.
5. Apparatus in accordance with claim 1, further characterized by:
fluid in said conduit means being a gas.
fluid in said conduit means being a gas.
6. Apparatus in accordance with claim 1, further characterized by:
fluid in said conduit means being a liquid.
fluid in said conduit means being a liquid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MX15348774 | 1974-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1043141A true CA1043141A (en) | 1978-11-28 |
Family
ID=19745491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA234,171A Expired CA1043141A (en) | 1974-08-30 | 1975-08-26 | Apparatus for use when playing a stringed instrument |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5150719A (en) |
| AU (1) | AU502916B2 (en) |
| BR (1) | BR7505535A (en) |
| CA (1) | CA1043141A (en) |
| CH (1) | CH591736A5 (en) |
| DE (2) | DE2538366C3 (en) |
| FR (1) | FR2283500A1 (en) |
| GB (1) | GB1514778A (en) |
| IT (1) | IT1033974B (en) |
| NL (1) | NL7510205A (en) |
| SE (1) | SE7509554L (en) |
| ZA (1) | ZA755476B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5393925A (en) * | 1993-02-19 | 1995-02-28 | Wilson; Gary D. | Apparatus for playing a stringed instrument |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4283777A (en) * | 1979-05-14 | 1981-08-11 | Xerox Corporation | Optical memory having a parallel read out |
| DE3219590C1 (en) * | 1982-04-01 | 1982-12-09 | Volker 8080 Emmering Habicht | Device for string instruments for setting chords |
| CN105006225B (en) * | 2014-04-25 | 2018-09-25 | 周建峰 | A kind of guitar chord fingering device |
-
1975
- 1975-08-26 IT IT12764/75A patent/IT1033974B/en active
- 1975-08-26 CA CA234,171A patent/CA1043141A/en not_active Expired
- 1975-08-27 AU AU84332/75A patent/AU502916B2/en not_active Expired
- 1975-08-27 ZA ZA755476A patent/ZA755476B/en unknown
- 1975-08-28 NL NL7510205A patent/NL7510205A/en active Search and Examination
- 1975-08-28 JP JP50104478A patent/JPS5150719A/ja active Pending
- 1975-08-28 FR FR7526471A patent/FR2283500A1/en active Granted
- 1975-08-28 SE SE7509554A patent/SE7509554L/en unknown
- 1975-08-28 DE DE2538366A patent/DE2538366C3/en not_active Expired
- 1975-08-28 CH CH1113175A patent/CH591736A5/xx not_active IP Right Cessation
- 1975-08-28 GB GB35600/75A patent/GB1514778A/en not_active Expired
- 1975-08-28 DE DE7527271U patent/DE7527271U/en not_active Expired
- 1975-08-29 BR BR7505535*A patent/BR7505535A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5393925A (en) * | 1993-02-19 | 1995-02-28 | Wilson; Gary D. | Apparatus for playing a stringed instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7505535A (en) | 1976-08-03 |
| AU8433275A (en) | 1977-03-03 |
| DE2538366A1 (en) | 1976-03-11 |
| GB1514778A (en) | 1978-06-21 |
| IT1033974B (en) | 1979-08-10 |
| JPS5150719A (en) | 1976-05-04 |
| FR2283500B1 (en) | 1981-05-08 |
| CH591736A5 (en) | 1977-09-30 |
| FR2283500A1 (en) | 1976-03-26 |
| SE7509554L (en) | 1976-03-01 |
| DE7527271U (en) | 1976-12-02 |
| DE2538366B2 (en) | 1978-10-05 |
| AU502916B2 (en) | 1979-08-16 |
| ZA755476B (en) | 1977-09-28 |
| NL7510205A (en) | 1976-03-02 |
| DE2538366C3 (en) | 1979-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4030400A (en) | Chord playing attachment for a stringed instrument | |
| AU671705B2 (en) | A force feedback and texture simulating interface device | |
| US4566365A (en) | Chord playing attachment for stringed musical instruments | |
| US3933077A (en) | Converter for guitars | |
| CA1043141A (en) | Apparatus for use when playing a stringed instrument | |
| US2669151A (en) | Chord player | |
| US3776088A (en) | Chord playing attachment for string musical instruments | |
| US3995523A (en) | Devices for use with stringed musical instruments | |
| KR900008435A (en) | Piano keyboard | |
| US2203393A (en) | Musical instrument | |
| US4116107A (en) | Stringed instrument mute mechanism | |
| CN105845119A (en) | Intelligent palm musical instrument and performance method | |
| US3422717A (en) | Chord playing attachment for fretted musical instruments | |
| EP3701517B1 (en) | Device and method for damping of aliquot tones | |
| US4258477A (en) | Multiplication study device | |
| US10643585B1 (en) | Auxiliary device coupled to a stringed instrument | |
| US589658A (en) | Attachment for stringed musical instruments | |
| FR2376480A1 (en) | Keyboard for musical instrument - has keys in form of pads for operation by fingers or forearm | |
| US2906158A (en) | Stringed musical instrument of the percussion type | |
| EP0123898A3 (en) | Electronic accordion organ | |
| US3237503A (en) | Stringed musical instrument | |
| US1667925A (en) | Stringed-instrument player | |
| CN220753277U (en) | Compression-resistant keyboard | |
| CN215834238U (en) | Guitar auxiliary device | |
| US15401A (en) | Valve of accordions |