USRE6637E - Improvement in organ reed-boards - Google Patents

Description

UNITED STATES PATENT OFFICEo ALFRED W. VVILCOX, OF WORCESTER, MASSACHUSETTS.

IMPROVEMENT IN ORGAN REEDBO'ARDS.

Specication forming part of Letters Patent No. 140,750, dated July 8, 1873 reissue No. 6,637, dated September 7, 1875; application filed August 7, 1875.

DIVISION A.

To all whom it may concern:

Beit known that I, ALFRED, W. WILoox, formerly ot' New Haven, Connecticut, now of l'fVorcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Organ Reed-Boards; and I do hereby declare that the following is a full, clear, and exact description thereof, that willl enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specication, in which- Figure 1 represents a vertical transverse section through the reed and sound or valve the reed-chamber proper', an auxiliary airchamber, so arranged and constructed as to communicate with the Vformer at or near its open end, it being otherwise completely closed, except at that opening.

To enable those skilled in 'the art to make, construct, and use my improvement, I will now proceed to describe its parts in detail, omitting a description of such parts of the Ainstrument as may not be essential to a full understanding oi' the invention.

The sound-board A may be made in any of the known ways, but I prefer to make it of thinstrips or sheets of veneers, laid and glued together crosswise of the grain to each other, so as to free it from all tendency to warp; but as this Vfeature forms the separate subjectmatter of Division B of this reissue, it is not deemed necessary to further describe it in this.

The sound-board is provided with the usual slits or valve-openin gs a, beneath which are arranged'the valves B, and which may be operated in the ordinary or other suitable and kno wn way. C represents the reedboard proper;

D, the reed cells or chambers; and E the reeds, lthe latter two being constructed and arranged substantially as in common use. Above the reed-cells D, however, the reedboard is provided with a series of auxiliary air-chambers, F, corresponding in number with chambers D, each of which is provided with an opening, b, which communicates with one of the latter, at or near its mouth. Preferably, each of these auxiliary chambers F is formed of about the same size or capacity as its chamber D, with which it communicates.

The auxiliary chamber F may not only be applied to the chamberD of thelower reeds, but may also be, with nearly equal advantage, applied to all.

The operation is as follows: The valve B being opened, air rushes into chamber D and past opening b, and thence down through the reed E. In passing opening b the inliowing air draws air from chamber F until the quantity of air therein is reduced equal to the draft. therefrom from the inflowing air. The vibrations of the reed naturally create a tremor or somewhat interrupted flow to the air, causing the remaining air in the 4auxiliary chamber-and which, to a certain extent, now forms a partial vacuum-to vibrate' in unison or harmony with the vibrations ofthe reed, therebyimparting a better, smoother, and stronger tone to the latter than in cells of the usual construction.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. An auxihary air-chamber, F, provided with an opening, b, in combination with a reed cell or chamber, D, of a musical-instru-- ment, substantially as and for the purpose set forth.

2. A reed or tube board, C, provided with l cells D and auxiliary communicating-chambers F, substantially as set forth.

In testimony that I claim the foregoing, I have hereunto set my hand this 7th day of July, 1875.

ALFRED W. WILCOX.

Witnesses: 4

DAvID MANNING, J r., ALFRED D. WARREN.

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