US2647430A - Muting bar for electrical musical instruments - Google Patents

Muting bar for electrical musical instruments Download PDF

Info

Publication number
US2647430A
US2647430A US186659A US18665950A US2647430A US 2647430 A US2647430 A US 2647430A US 186659 A US186659 A US 186659A US 18665950 A US18665950 A US 18665950A US 2647430 A US2647430 A US 2647430A
Authority
US
United States
Prior art keywords
muting
bar
chimes
frame
actuating
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 - Lifetime
Application number
US186659A
Inventor
Arden L Schilling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US186659A priority Critical patent/US2647430A/en
Application granted granted Critical
Publication of US2647430A publication Critical patent/US2647430A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • G10D13/00—Percussion musical instruments; Details or accessories therefor
    • G10D13/01—General design of percussion musical instruments
    • G10D13/08—Multi-toned musical instruments with sonorous bars, blocks, forks, gongs, plates, rods or teeth

Definitions

  • 1 invention relates to the class of musical instruments and more particularly to electrically actuated chimes and the like.
  • An object of this invention is to provide simple means which may be readily installed on the framework from which opposed rows of chimes depend for actuating the chimes.
  • Another obiec. of this invention resides in the provision of a simple though highly efficient muting bar for use in muting opposed rows of chimes.
  • Still further objects of the invention reside in the provision of the means for simply and easily installing solenoid actuated structure means for actuating a set of chimes.
  • Figure 1 is a side elevational View of the pre- I ferred form of the invention
  • Figure 2 is an end elevational view of the device, shown in Figure 1;
  • Figure 3 is a sectional detail as taken along line lie-i3 in Figure 1;
  • Figure 4 is another vertical sectional detail as taken along line 44 in Figure 1
  • Figure 5 is a horizontal sect1onal detail as taken along line 55 in Figure 1;
  • Figure 6 is a sectional detail view showing the construction of the solenoids for actuating the striker members.
  • Figure '7 is a perspective view showing the construction of one of the striker members.
  • The-solenoids .22 and 2.4 dependfrom the support member 2.6 and are secured to plates 2% and .30 respectively.
  • the member 26 is hingedly secured to the frame III by means of the plate 32 which is detachably secured about the frame it, the frame 1L0 being received within recess it formed in one end of the member 25.
  • the other end of the member 26 is provided with a notched portion as .at 36 so that the extension 38 of the member ZB'may engage another portion of the frame 10 when it is desired to rotate the member -26'to lock it in place.
  • 'A' plate 40 and bolts 42 are provided for lockingly holding the member 28 in engagement with the other portionof the frame Ill.
  • the strikers I 8 and Marc secured to the support member "26 by means of individual hinge elements 44 and 46 through which hinge elements there are attached springs 48 and 51] for continuously urging the strikers out of engagement withthe chimes "l4 and 16.
  • the strikers Hand 2 0 eachconsists of disks 52 of similar material which are secured to the ends of the shafts 54.
  • a keyboard 56 for actuating the solenoids and the keyboard is electrically operatively connected to the solenoids and to a suitable sourceol. electrical power.
  • One of the :keys in the keyboard 56 is provided for actuating the prime mover comprising an electrical motor as indicated at '58 which is mounted on a horizontal support plate 59 which is provided with apertures 60 through which the chimes l4 and f6 extend.
  • the motor 58 is provided for actuating the muting bar 62 which is mounted on a shaft '64 'rotatably journaled in the frame 1 0.
  • a lever GB' is secured to the muting bar '62 and has one end-of a line 68 secured thereto, :the .otherend of the line being secured to a drum :70 driven by the-motor 58.
  • a spring 12 is terminally secured tothemuting bar and to the plate '59 to continuously urge: the muting bar t2 out of engagement with the chimes.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of saidchimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, and electrical circuit means including said keyboard switch means for activating said solenoids and said muting bar.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured tosaid shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, electrical circuit motor carried by said frame, a drum driven by said motor, and a line terminally secured to said drum and to said lever.
  • An electrically actuated musical instrument comprising a tubular frame having dependingtherefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting'bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, electrical circuit means including said keyboard switch means for activating said solenoids and said muting bar, a horizontal support plate secured to said frame, said chimes extendin through apertures in said plate, said means for actuating said muting bar including a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor and a line terminally secured to said drum and to said lever.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, a horizontal support plate secured to said frame, said chimes extending through apertures in said plate, said means for actuating said muting bar including a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor, a line terminally secured to said drum and to said lever, said resilient means including a spring terminally secured to said muting bar and said plate.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members rigidly securing said member to said frame.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members rigidly securing said member to said frame, said means for actuating said muting bar comprising a lever attached to said muting bar, a motor carried by said frame, a drum driven by said motor, and a line terminally secured to said drum and to said lever.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urgin said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members rigidly securing said member to said frame.
  • said means for actuating said muting bar comprisin a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor, and a line terminally secured to said drum and to said lever.
  • An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members 6 rigidly securing said member to said frame, a horizontal support plate secured to said frame, said chimes extending through apertures in said plate, said means for actuating said muting bar comprising a lever attached to said muting bar, a motor carried by said plate, a drum

Description

A. L. SCHILLITQG 7,
MUTING BAR FOR ELECTRICAL MUSICAL. INSTRUMENTS 2 Sheets-Sheet l Aug. 4, 1953 Filed Sept. 25, 1950 Arden L. Schilling INVENTOR.
BY Quad-3:...
W /ma A. L. SCHILLING MUTING BAR FOR ELECTRICAL MUSICAL INSTRUMENTS 2 Sheets-Sheet 2 Aug. 4, 1953 Filed Sept. 25, 1950 Fig.7
Arden L. Schilling INVENTOR.
Patented Aug. 4, 1953 MUTING BARFOR ELECTRICAL MUSICAL INSTRUMENTS Arden L. Schilling, Decatur, :Ind;
Application September 25, 195. Serial No. 186,659
8 Claims.
1 invention relates to the class of musical instruments and more particularly to electrically actuated chimes and the like.
An object of this invention is to provide simple means which may be readily installed on the framework from which opposed rows of chimes depend for actuating the chimes.
Another obiec. of this invention resides in the provision of a simple though highly efficient muting bar for use in muting opposed rows of chimes.
Still further objects of the invention reside in the provision of the means for simply and easily installing solenoid actuated structure means for actuating a set of chimes. 1
Other objects of the invention reside in the provision of an electrical musical instrument that is simple in construction, strong, durable, highly efficient in operation, capable of be ng played from a simple keyboard, and which instrument is relatively inexpensive to manufacture.
These, together with the various ancillary objects of the invention which will become apparent as the following description proceeds, are attained by this electrical musical instrument, a preferred embodiment of which has been 11- lustrated in the accompanying drawings, by way of example, wherein:
Figure 1 is a side elevational View of the pre- I ferred form of the invention;
Figure 2 is an end elevational view of the device, shown in Figure 1;
Figure 3 is a sectional detail as taken along line lie-i3 in Figure 1;
Figure 4 is another vertical sectional detail as taken along line 44 in Figure 1 Figure 5 is a horizontal sect1onal detail as taken along line 55 in Figure 1;
Figure 6 is a sectional detail view showing the construction of the solenoids for actuating the striker members; and
Figure '7 is a perspective view showing the construction of one of the striker members.
'l/Vith continuing reference to the accompanying drawings wherein like reference numeralsin rows as indicated at 22 and 24. The-solenoids .22 and 2.4 dependfrom the support member 2.6 and are secured to plates 2% and .30 respectively. The member 26 is hingedly secured to the frame III by means of the plate 32 which is detachably secured about the frame it, the frame 1L0 being received within recess it formed in one end of the member 25. The other end of the member 26 is provided with a notched portion as .at 36 so that the extension 38 of the member ZB'may engage another portion of the frame 10 when it is desired to rotate the member -26'to lock it in place. 'A' plate 40 and bolts 42 are provided for lockingly holding the member 28 in engagement with the other portionof the frame Ill.
The strikers I 8 and Marc secured to the support member "26 by means of individual hinge elements 44 and 46 through which hinge elements there are attached springs 48 and 51] for continuously urging the strikers out of engagement withthe chimes "l4 and 16. The strikers Hand 2 0 eachconsists of disks 52 of similar material which are secured to the ends of the shafts 54.
There is provided a keyboard 56 for actuating the solenoids and the keyboard is electrically operatively connected to the solenoids and to a suitable sourceol. electrical power. One of the :keys in the keyboard 56 is provided for actuating the prime mover comprising an electrical motor as indicated at '58 which is mounted on a horizontal support plate 59 which is provided with apertures 60 through which the chimes l4 and f6 extend.- The motor 58 is provided for actuating the muting bar 62 which is mounted on a shaft '64 'rotatably journaled in the frame 1 0. A lever GB'is secured to the muting bar '62 and has one end-of a line 68 secured thereto, :the .otherend of the line being secured to a drum :70 driven by the-motor 58. Hence, upon actuation of-the motor 58 rotation of the drum 10 will cause, the muting bar to engage the chimes ill anddfi. A spring 12 is terminally secured tothemuting bar and to the plate '59 to continuously urge: the muting bar t2 out of engagement with the chimes.
of the coils I4 in order thatwhen the solenoid :is actuated sand the core 15 pulled inwardly, the
.core ".lfi willnotcontact a rigid member so as to create .an. unpleasant noise.
:Since fromtheforegoins the construction and advantages of this electrical musical instrument are readily apparent, further description is believed to be unnecessary.
However, since numerous modifications will readily occur to those skilled in the art after a consideration of the foregoing specification and accompanying drawings, it is not intended to limit the invention to the precise embodiment shown and described, but all suitable modifications and equivalents may be readily resorted to falling within the scope of the appended claims.
Having described the invention what is claimed as new is:
1. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of saidchimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, and electrical circuit means including said keyboard switch means for activating said solenoids and said muting bar.
2. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured tosaid shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, electrical circuit motor carried by said frame, a drum driven by said motor, and a line terminally secured to said drum and to said lever.
3. An electrically actuated musical instrument comprising a tubular frame having dependingtherefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting'bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, electrical circuit means including said keyboard switch means for activating said solenoids and said muting bar, a horizontal support plate secured to said frame, said chimes extendin through apertures in said plate, said means for actuating said muting bar including a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor and a line terminally secured to said drum and to said lever.
4. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, a horizontal support plate secured to said frame, said chimes extending through apertures in said plate, said means for actuating said muting bar including a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor, a line terminally secured to said drum and to said lever, said resilient means including a spring terminally secured to said muting bar and said plate.
5. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members rigidly securing said member to said frame.
6. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members rigidly securing said member to said frame, said means for actuating said muting bar comprising a lever attached to said muting bar, a motor carried by said frame, a drum driven by said motor, and a line terminally secured to said drum and to said lever.
'7. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urgin said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members rigidly securing said member to said frame.
a horizontal support plate secured to said frame,
said chimes extending through apertures in said plate, said means for actuating said muting bar comprisin a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor, and a line terminally secured to said drum and to said lever.
8. An electrically actuated musical instrument comprising a tubular frame having depending therefrom opposed rows of chimes, resiliently mounted strikers for each of said chimes, solenoids for actuating said strikers, a shaft journaled in said frame, a muting bar secured to said shaft, means for actuating said muting bar by urging said muting bar into engagement with said chimes, resilient means continuously urging said muting bar out of engagement with said chimes, keyboard switch means, circuit means including said keyboard switch means for activating said solenoids and said muting bar, said solenoids depending from a support member, hinge means for rotatably securing one end of said support member to said frame and locking means at the other end of said support members 6 rigidly securing said member to said frame, a horizontal support plate secured to said frame, said chimes extending through apertures in said plate, said means for actuating said muting bar comprising a lever attached to said muting bar, a motor carried by said plate, a drum driven by said motor, a line terminally secured to said drum and to said lever, said resilient means comprising a spring terminally secured to said muting bar and said plate.
ARDEN Li SCHILLIN G.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,034,001 Durfee July 30, 1912 2,456,321 Rhodes Dec. 14, 1948 2,463,543 Kunz Mar. 8, 1949 2,528,663 Mitchell Nov. 7, 1950 2,540,925 Zimmerman Feb. 6-, 1951
US186659A 1950-09-25 1950-09-25 Muting bar for electrical musical instruments Expired - Lifetime US2647430A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US186659A US2647430A (en) 1950-09-25 1950-09-25 Muting bar for electrical musical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US186659A US2647430A (en) 1950-09-25 1950-09-25 Muting bar for electrical musical instruments

Publications (1)

Publication Number Publication Date
US2647430A true US2647430A (en) 1953-08-04

Family

ID=22685805

Family Applications (1)

Application Number Title Priority Date Filing Date
US186659A Expired - Lifetime US2647430A (en) 1950-09-25 1950-09-25 Muting bar for electrical musical instruments

Country Status (1)

Country Link
US (1) US2647430A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771407A (en) * 1972-08-18 1973-11-13 V Leonard Rhythm practice console
US3974731A (en) * 1974-12-30 1976-08-17 John Joslyn Musical toy
US7534949B1 (en) * 2006-05-23 2009-05-19 Roark Licensing, Llc Acoustic sculpture
WO2011026208A2 (en) 2009-09-02 2011-03-10 Alphonse Emile Van Leggelo Musical instrument mechanically activated
US20170278494A1 (en) * 2016-03-22 2017-09-28 Yamaha Corporation Supporter for supporting sound tubes to be hung therefrom and method of producing the same, and musical instrument

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1034001A (en) * 1911-04-22 1912-07-30 Walter H Durfee Bell-ringing apparatus.
US2456321A (en) * 1947-11-19 1948-12-14 Harold B Rhodes Piano dampening mechanism
US2463543A (en) * 1949-03-08 Jacob t
US2528663A (en) * 1950-11-07 String operated magnetoelectric
US2540925A (en) * 1945-11-10 1951-02-06 Zimmerman Harry Musical instrument of the xylophone type

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2463543A (en) * 1949-03-08 Jacob t
US2528663A (en) * 1950-11-07 String operated magnetoelectric
US1034001A (en) * 1911-04-22 1912-07-30 Walter H Durfee Bell-ringing apparatus.
US2540925A (en) * 1945-11-10 1951-02-06 Zimmerman Harry Musical instrument of the xylophone type
US2456321A (en) * 1947-11-19 1948-12-14 Harold B Rhodes Piano dampening mechanism

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771407A (en) * 1972-08-18 1973-11-13 V Leonard Rhythm practice console
US3974731A (en) * 1974-12-30 1976-08-17 John Joslyn Musical toy
US7534949B1 (en) * 2006-05-23 2009-05-19 Roark Licensing, Llc Acoustic sculpture
WO2011026208A2 (en) 2009-09-02 2011-03-10 Alphonse Emile Van Leggelo Musical instrument mechanically activated
US20170278494A1 (en) * 2016-03-22 2017-09-28 Yamaha Corporation Supporter for supporting sound tubes to be hung therefrom and method of producing the same, and musical instrument
US9916820B2 (en) * 2016-03-22 2018-03-13 Yamaha Corporation Supporter for supporting sound tubes to be hung therefrom and method of producing the same, and musical instrument

Similar Documents

Publication Publication Date Title
US2647430A (en) Muting bar for electrical musical instruments
US3769870A (en) Caroling bells
US2252290A (en) Toy
US3090273A (en) Musical swing
US1526045A (en) Mounting for electric motors
US2971424A (en) Vibrating bar type musical instrument having strikers
US2822717A (en) Electrically operated player for bass drums
US1565439A (en) Musical i
US2459103A (en) Musical instrument
US2705936A (en) Musical door movement signal
US3299762A (en) Music box
US2228249A (en) Tune indicating device for musical instruments
US3747459A (en) Musical toy
US3405584A (en) Apparatus for electrically actuating a musical instrument
US2873639A (en) Toy piano having key mounted tone bars
US2104963A (en) Electric door chime
US4092893A (en) Multiple selective bell console and instrument
US1540739A (en) Combined piano and practice instrument
US4023458A (en) Toy piano
US2414656A (en) Sdumd brobucing jnsmibmdent
US2861494A (en) Single string bass viol
US1761486A (en) Sounding device
US2569525A (en) Piano playing device
US2767607A (en) Electric and portable piano
US2722154A (en) Portable keyboard structure and music retainer