US844879A - Valve for pneumatic musical instruments. - Google Patents

Valve for pneumatic musical instruments. Download PDF

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US844879A
US844879A US28920805A US1905289208A US844879A US 844879 A US844879 A US 844879A US 28920805 A US28920805 A US 28920805A US 1905289208 A US1905289208 A US 1905289208A US 844879 A US844879 A US 844879A
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valve
musical instruments
ports
chamber
pneumatic
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US28920805A
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Eugene De Kleist
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Eugene De Kleist
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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10FAUTOMATIC MUSICAL INSTRUMENTS
    • G10F1/00Automatic musical instruments
    • G10F1/02Pianofortes with keyboard

Description

No; 344379. PATENTED FEB.19, 1907. E. DE KLEIST.
VALVE FOR PNEUMATIG .MUSICAL INSTRUMENTS.
APPLIOATION I'ILED NOV. 27. 1905.
J'i L' x//lllllllllllllllllllllllllylllllllllllllllll o five/ii?? ;7 527165 ses:
EUGENE DE KLEIST, OF NORTH TONAW ANDA, NEW' YORK.
VALVE FOR PNEUIVIATIC IVIUSlCAL lNSTRUIVIENTS.
Specficaton of Letters Patent.
Pate nted Feb. 19, 1907.
Application filed November 27, 1905. Serial No. 289.208.
To a, whmn ?It 77%:1 con/067%:
Be it known that I, EUGENE DE KLEIsT, a citizen oi' the United States, residing at North Tonawanda, in the county of Niagara and State of New York, have invented a new and useful Improvement in Valves tor l Pneumatic Musical Instruments, of which the following is a specification.
This invention relates more particularly to that class of valves which are employed in pneumatic pianos, piano-players, and other pneu natic musical instruments and which are capable of' a limited swiveling action to enable then to adapt themselves to any i1nperfections of their seats, due to warping or other causes, thus insuring a reliable closure ot the same under all conditions.
It is the object of ray invention to provide a simple and reliable valve of this kind which can be cheaply produced.
In the accompanying drawings, Figure 1 is a fragmentary vertical section or" an automatic piano enbodying my invention. Fig. 2 is a side elevation of the duplex valve.
Similar letters of reference indicate corresponding parts throughout the several views.
In the drawings but a single unit of the pneumatic action is shown, as the general organization of such instrumente is Well understood by those skilled in the art, an example being found in Letters Patent of the United States No. 726,'701, granted to me April 28, 1903.
A indicates one of the motor-pneuinatics of the action, and B the sticker, which transmits the motion of the same to the pianohammer or other sound-producing part. (Not shown in the drawngs.) The motorpneumatic is connected by a duet or channel c with a Valve-chamber D, preferably arranged in the top board of the wind-chest E. This valve-chamber communicates at its upper end With the atmosphere by vent-porte f, while its lower end communicates by ports g With the eXhaust-chamber E ot the Windchest. These ports are formed in guideplates l g', secured to the upper and lower ends of the valve-chamber. The vent and exhaust ports are controlled by a double puppet-valve arranged in the valve-chance ber. The upper member h of this valve is adapted to seat against the upper plate f' for closing the vent-ports, and the lower member h' is adapted to seat against the lower plate g' for closing the eXhaust-ports, the arrangement being such that the eX- haust-valve is opened when the vent-valve is closed, and vice ver-sa, as is usual in this class of pneuinatic actions.
The upp ervalve member h is provided with an upwardlv-extending aXial stern i, guided in a central opening of the top plate 7", while the lower valve member h has a similar stem i', passing downwardlv through the lower plate g' and provided at its lower end with an adjustable nut or button j, which rests upon a 'llexible diaphragm K. The upper valve member rests looselv upon the lower member, and the contiguous faces of the two members are resp ectively concave and conveX. In the preferred Construction (shown in the drawings) the upper member is provided in its bottom with a conical socket Z and the lower member has a conical upper end Z' fitting into said socket, the conical contact faces of the two members being of di'fl'erent angles or pitches to allow each valve member to swivel in all directions on the other. This construction permits the valve members to seat squarely against the ends ot the valve-chamber and to adjust themselves to any imperfection or unevenness ol the valve-seats, such as is sometimes caused by the warpingof the parts, due to atmospheric changes. The straight front ends of the valves are provided with the usual facings of leather or other suitable material. The flexible diaphragm K covers an air pocket or chamber IC, which is connected With one of the ducts m of a tracker-board M and which also communicates with the eXhaustchamber E' by the usual small duet or pinhole n. As is common in this class of pneumatic actions, the diaphragm K is permitted to descend under the weight of the valve members h h' when an imper'forate portion of the customary music-sheet closes the duct m, thereby cutting ofi" communication between the motor-pneunatic and the eXhaust-chamber E' and placing it in communication with the atmosphere, while when a perforation of the music-sheet registers with said duet the diaphragm is elevated and reverses the valve members, thereby collapsing the motorpneumatic and Operating the corresponding sound-producing part.
I claim as my invention 1. In a pneumatic music al instrument, the combination of a chamber having opposing ports, and a duplex valve comprising opposing valve-heads coperating with said ports, one of said heads having a concave back and the other a convex back bearing against said IIO concave back, said heads being free to move at an angle to each other, substantiaily as set forth.
2. In a pneumatic muscial instrument, the combinat on of a chamber having opposing ports, and a duplex valve comprising opposing valve-heads coperating With said ports, one of said heads being provided in its back With a conicai socket and the other With a concal rear end fitting into said socket, the contguous faces of the two heads being` of difi'erent pitches. substantially as set forth.
3. In a pneuinatic musical instrument, the cembination of a Wind-chest, a vaive-chamber having exhaust and vent ports communic-ating respective] y With the Wind-chest and &14,879
the atmosphere, a duplex valve conprisng eXhaust and vent heads or members arranged in said chamber and controliing the corresponding ports thereof, one of said members being provided in its back With a conical socket and the Other With a conical rear end seated in said socke't, and means for guding said valve members, substantially as set forth.
itness m v hand this 18th day of November, 1905.
EUGENE DE KLEIST.
VVi tnesses:
C. F. GEYER, E. M. GRAHAM.
US28920805A 1905-11-27 1905-11-27 Valve for pneumatic musical instruments. Expired - Lifetime US844879A (en)

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