US1048615A - Valve for pneumatic piano-players, &c. - Google Patents

Description

J. A. WESER.

VALVE FOE PNEUMATIC PIANO PLAYERS, (m.

APPLIGATION FILED D3012, 1911.

1.048.615. Patented De0.31,1912.

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,the invention, however,

JOHN A. WESEB, or NEW YORK, m

VALVE FOB PNEUMATIC PIANO-PLAYERS, 8w.

Specification of Letters Patent. Patented Dec. 3111912.

Serial No. 665,363.

Application filed December 12, 1911.

of felt somewhat stiffer than the body, or of other suitable material, and contact pieces f" and f of thin leather, for contact with To all whom it may concern Be it known that 1, JOHN A. Wnsnu, a citizen of the United States, residing in the borough of Manhattan of the city of New the valve cups or rings 1) and c. The con York, New York county, State of New .tact piece or cover f adjacent to the dia- York, have invented certain new and .usephragm, is preferably imperforate, as fol Improvements in Valves for Pneumatic shown, while the contact piece or cover f on the opposlte end of the valve, is perforate, as at f, having an aperture of relatively small diameter to cooperate with the guide pin hereinafter referred to. The body of the valve, including the caps, is recesse as at f, the recess havinga diameter relatively. greater than that of the guide pin. The valve may therefore tiltwith respect to the stationary guide pin andlso adapt itself to the position of the valve ring D or c as the case may be. The valve is guided in its movements by a stationary guide pin ,g which is suitably supported so as to enter Piano-llayers, &c., of which the following is a specification, reference being had to the accompanying drawing, which forms a part hereof.

The invention relates to valves such as are commonly used in pneumatic playing devices for musical instruments and for other purposes, and has for itsvobjeet to improve the construction and operation of such valves, to reduce the cost of manufacture and to enable them to be placed in position and adjusted readily.

The invention will be more fully eX- lained hereinafter with reference to the accompanying drawing in which it is illustrated and in which the single figure is a detail view a valve the recess 1n the valve tself through one side, In the construction shown'it enters freely through the aperture f in the cover f, which is nevertheless of such small diameter that the valve is maintained substantially in axial position in its movein section illustratlng structure such as is commonly employed in the pneumatics of pneumatic piano players, embodying the improved valve.

It will be obvious, as this description proceeds, that the improved valve may be employed in any valve structure in which it is possible to .use a valve of similar type. For convenience in explanation'of the nature of it is shown in the drawing as applied to an ordinary form 0 valve structure, commonly employed in the pneumatics of pneumatic controlling devices of piano pl aycrs. This structure comprises, as shown, a valve casing (1, having in its top an aperture in which is mounte frictionally ring I) with a central portb' and in the other side a valve cup or ring 3 with a central port 0, the port 7) usually opening to" atmosphere and the port 0 to the vacuum system of 'the player, a iaphragm chamber (Z with its diaphragm (1,- and a. button 0, provided with an adjusting screw 6, by which the movement of the diaphragm controls the valve which is placed within the valve chamber a.

The valve f is suited in form tothe particular use for which it is designed. In the form shown it comprises a central body f, which may be of very light and .soft felt or other suitable material, top and bottom caps f and f which are sufficiently large in diameter to cover the valve ports and may be enough to-penetrate the valve completely in any position of the valve, the opposite end of the recess f being preferably closedby /the imperforate :cov-er f so that there is no leakage of air through thevalve itself. The recess 7" however, is sufliciently large to per mit the valve to tilt with respect to the any relative position of the valve seat. The guide pin is preferably formed of a bent wire. and secured in the valve ring'b.

The wire-"g, which forms the guide pin, being-bent in .U shape, as shown, is readily secured; in place by driving theshort menibe; into the-valve ring 6 and does not project above the-upper surface of the casing nor require screws or'cross-bars or other devices to hold it in place. the valve ring before the latter is placed in position it is itself placed in position with the valve ring and requires no fur-thermani'pulation. The upper valve ring 7),as will be observed, is larger in diameter than the valve f-so that the latter can be dropped into place through the aperture in which the valve ring is subsequently placed. Further- -more, through the placing of the button 0 on the diaphragm and the location of the relatively Being secured to ment. The stationary guide pin is not long "guide pin and therefore to adaptitself to adjusting screw 6 in the top of the button 7 the necessary adjustment to regulate the lifting of the valvecan be effected before the valve and the upper valve ring are put in place. 'And moreover, since the button is fixed with respect to the diaphragm, usually being glued thereto and the point of contact between the button and the valve is in or above the plane of contact between the valve and the lower valve ring, the valve itself will be moved more easily and more certainly in to its desired position, since it bears directly with free rocking movement on the top of the button, than would be possible if the valve were provided with a stcm'extending downward below the plane of contact between the lower valve ring and the valve to the surface ot the diaphragm.

I claim as my invention:

1. In a valve structure of the character described the combination of a valve casing having opposite ports, a valve within the casing, said 'alve comprising an imperforate bottom, a recessed body and a perforate top, a stationary guide-pin entering the valve freely from above, a diaphragm to control the valve, abutton on the diaphragm, and an adjusting device supported by the button.

2. In a valve structure of. the character described, the combination of a valve casing, a valve ring inserted in one side of the easing and forming a. valve seat, a valve therefor located in the casing, and a U-shaped wire having one member driven into the valve ring and having its other member extended centrally into the valve casing to form a stationary guide-pin for the valve. 4 This specification signed and witnessed this 8th day of December A. 1)., 1911.

. JOHN A. VYESER.

Signed in the presence of \V. B. GREELEY, lVon'rnmc'rox CAMPBELL.

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