US894546A - Pneumatic-action for musical instruments. - Google Patents

Description

i m ml N.0.;894,5fl6. I PATENTE D JULY 28, 1908.

. E. A; STEEL.

PNEUMATIC ACTION FOR MUSICAL INSTRUMENTS.

APPLICATION FILED SEPT. 14.11907.

-"YW I IJVEW'TUH W06 EDWARD JTE.

EDWA RI) A.STEEL,

or DETROIT, MICHIGAN, Assieuon To run FARRAND ooMrANr, or

DETROIT, MIOHIGAN, A CORPORATION OF MICHIGAN.

PNEUMATIC-ACTION FOR MUSICAL INSTRUMENTS.

no. ceases.

, To all whom it may concern:

Be it knownthat I, EDWARD A. STEEL, a citizen of the United States of America, residinat Detroit, in the county of Wayne and State of Michigan, haveinverlted certain new and useful Improvements in Pneumatic-Actions for Instruments, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to pneumatic actions for self-playing musical instruments, and more particularly to that type known as metallic actions.

The invention consists in certain features of construction as hereinafter set forth.

In the drawingsFigure l is a vertical sec tion partly in crosssection of a'portion of the action; and Fig. 2 is a front elevation of the metallic wind chest.

In the constructions of metallic actions for self-playing pianos, it is' of the utmost importance to arrange the parts as compactly as possible, so as to avoid increasing the size of the outer case. With metallic actions heretofore constructed, it has been usual to form a metallic wind chest, which is arranged in a vertical plane, near the front of the case, with the power pneumatics ar-' ranged in rear thereof, and the primary and secondary pneumatics at the front. This requires a depth of case equal to the length of.

the power pneumatics plus the thickness of the wind chest and the space necessary for their primary and secondary pouches. With the present construction, I have condensed the arrangement of parts and diminished the total width of the action by substituting for the single metallic chest a tubular chest and by arranging the power pneumatics to extend between the tubes.

As shown A are the power pneumatics, Each of these is provided with a metallic plate B, which has struck up therefrom a portion constituting the valve cell controlling the said pneumatics. Projecting laterally from this cell O is a tubular shank D which at its outer end is threaded at E for engagement with the cell F of the sedondary pneumatic. threaded nipple G for engaging the shank and is formed of two cupped disks an I, having peripheral flanges J for securing them together- K is a across the memberl, and having a disk L" 1 Specification of Letters Patent. Application filed September 14, 1907. Serial No. 392,917.

This cell has an internally Patented July 28, 1908.

thereon, for bearing against the valve rod M for the valve N in the cell C.

O is an extension of the member I, which is transversely apertured for receiving the sleeve P, which is apertured for communication with the chamber in the extension 0. This sleeve P is threaded for engagement with the cell Q for the primary pneumatic,

which is similar in construction to the secondary pneumatic cellF,- and is provided with a diaphragm R for operating the stem T of the primary valve. The arrangement is such that the primary, secondary and power pneumatics are all mechanically, connected to each other.

The wind chest to which the pneumatics are connected comprises a series of parallel horizontally extending tubes S, whlch are. spaced from each other, and at their ends are connected with headers U. Thesetubes S have alined apertures V in the front and rear walls thereor through which (the tubular shanks D may be passed, said shanks having apertures D. therein through which air com: municationis established with the tube S. Thevalve cell C is arranged on one side of the tube S, and the cell F for the secondary pneue matic is upon the opposite while the power pneumatic A neath the tube. Thus the total width of the action is less than where the power pneumatics are arranged upon one side of the chest, and furthermore the width of the side of said tube,

extends bechest may be increased without increasing,

the total width of the action.

WhatI claim as my invention is: 1. A pneumatic action oomprisin a metallic wind chest consistingof aralle spaced tubes and a connecting end eader, power pneumatics extending between said tubes and projlecting valve celvs connected with said ower pneumatics, and projecting upward tiierefrom beside said tubes, tubular shanks on said valve cells extending through said tubes and communicating with the interior thereof and valve olperating pneumatics connected with said s anks upon the opposite side of said. tubes.

"2. A pneumatic action comprising a 'metallic wind chestconsisting of a plurality of arallel spaced tubes, of a connecting end eader, said tubes being provided w'thalined power neumatics extending betwppn said tubes and projecting beyond one sidiefthereofv apertures in the front and rearwalls thereof, flexible diaphragm extending beyond one side thereof, w

shanks ro'ectin lateral T from saidvalve P J g 3 havlng valve cells projecting upward there- 1 In testimony whereof I affix 'mv s from mtermedlate the ends thereof, tubular 1n preseime of two mtnessss.

v- ETF/V C -13D cells and extendlng through sald'ahned spew tures in the tubes of the chest, and pneu- Witnesses:

matics connected with said shanks upon the NELLIE .TDIINER opposite sides of said tubes from said. cells. JAMES P. B

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