US650390A - Pneumatic-coupler for organs. - Google Patents

Description

No. 650,390. Patented May 29', I900.

E. c. HISCOCK.

PNEUMATIC COUPLER FOR URGANS.

IApplication filed Feb. 1, 1900.\

(No Model.)

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EMORY C. HISCOCK, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE IV. W.

KIMBALL COMPANY, OF SAME PLACE.

PN EU MATIC-COUPLER FOR ORGANS.

SPECIFICATION forming part of Letters Patent No. 650,390, dated May 29, 1900.

Application filed February 1, 1900. Serial No. 3,559. (No model.)

To (LZZ whom it may concern:

Be it known that I, EMORY C. HISCOOK, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Pneumatic-Couplers for Organs, of which the following is a specification.

This invention relates to that class of pneumatic-couplers by which the motor-supply channels of two notes adapted to be sounded together may be coupled so they will be thus sounded, and particularly to that variety of such couplers in which the channel of one of the notes is provided with an opening in its side leading to the outer air and through which its motor may be exhausted and with a valve or valves controlled when the coupler is being used by a membrane in the other channel and acting both to close said side opening and to prevent the escape of air from the source of supply while the motor is exhausted, the valves being also provided with an eXteriorly-located controlling-motor which prevents their operating unless the couplerstop is pulled. As heretofore constructed these couplers have been subject to one serious difficulty-viz, the leakage of the air around the valve-stems at the points where they pass through the side walls of the channels to their junction with said stop-motors. As the latter are normally inflated and as a large number of the couplers are usually embodied in an organ the leakage produces a humming or buzzing noise, which is very obj ectionable, and, moreover, it tends to nullify and render sluggish the exhaustion of the motor-channels when the keys of the channels are struck. To remedy this difficulty, I have been led to make the present invention, in which I locate the stop-motor between the valves and the companion channel and in such relation as to obviate the leakage referred to.

The nature of my invention is fully set forth in the subjoined description and illustrated in the accompanying drawing, in which is shown a vertical section of a part of an organ embodying my invention.

In said drawing, A represents one of the keys of the great-organ series, B the corresponding air-channel, leading to the motor valves to the key.

controlling the speaking-pipe of said key, and C and D are valves controlling said channel and connected by a stem common to both The valve C is the exhaust-valve and is normally closed, while valve D is normally open and is located in compressed-air-supply chamber F and prevents ihe escape of air therefrom when valve C is opened.

Gis one of the keys of the swell-organ series,

and H its corresponding motor-channel, leading to the motor of the pipe of key G.

J and K are valves similar to valves C and,

D, and M is the compressed-air-supply chain ber similar to chamber F of the other key.

In one side of channel II is a port H, opening directly to the. outer air and closed by valve 0, mounted on stem 0, supported at one end and operated in one direction by membranes P and P and supported at the other end in a blind opening 0 in the wall of chamber H. The membrane P is located in a chamber formed at the side of channel B and is inflated by air therefrom, and of course is deflated when that channel is deflated. The membrane P, which is the stop-membrane and under the control of the player by means of the coupler-stop, is located, as shown, between the valve and membrane P, with its outer surface exposed to the outer air and its inner surface normally inflated by the air-trunk T. This trunk deflates whenever the coupler-stop is pulled so as to allow the valve to shift. The trunk is located upon one side of a wall P and the chamber of membrane P upon the other side thereof. In the chamber of membrane P and back of said membrane is a blind space P having no outlet, and the stem of the valve emerges in this space from said wall. In channel II is an offset forming a seat for a second valve 0 also mounted on stem 0 in such relation that it moves to its seat when the stem is shifted in opening valve 0. When thus closed, the valve 0 prevents any access by the compressed air from chamber M to that portion of channel H lying beyond said valve.

The operation of the device is substantially that of previous constructions and will be fully understood from the patent to Hedgeland, No. 590,545, of September 21, 1897, ex-

cept that the leakage around the valve-stem in the Hedgeland construction is prevented, inasmuch as said stem instead of passing from trunk T into channel H passes in my improved construction through the Wall separating trunk T from the blind space in the chamber of membrane P, so that all injurious leakage around the stem is prevented.

1. A pneumatic-coupler for coupling two motor-channels, one of which has an exhaustport in its side, a valve closing said port and astop-motor for normally closing the valve, a stem connecting said valve and motor and passing through a wall separating the Windtrunk of said motor from a blind chamber at the other side of the wall, in combination with said blind chainbensubstantially as specified.

2. In a pneumatic-coupler, the combination of valve 0, a stem for said valve, a mem brane P to which the valve-stem is joined, said stem passing from the wind-trunk of said membrane through the Wall separating said trunk from a blind chamber at the other side of said wall and said blind chamber, substantially as specified.

I 3. The combination with the valve controlling the coupling of the channels and means for operating the valve, of the Wall P through which the stem of the valve passes, the compressed-air chambers at one side of said wall,

and a blind chamber at the other-side thereof, substantially as specified.

4. In a pneumatic-coupler, a valve-stem O in combination with motor-channels B and H, membrane P and membrane P and windtrunk for controlling said membrane, said wind-trunk being located at one side of a wall through which said stem passes, and a blind chamber at the back of said membrane Pat the other side of said wall, substantially as specified.

5. In a pneumatic-coupler, the combination with the coupled channels and the valvestem and the wall through which it passes, of a compressed-air passage at one side of said wall and a blind chamber at the other side thereof, whereby injurious leakage of the compressed air around the stem is prevented, substantially as specified.

6. The combination with the valve-stem and the wall through which it passes, of a compressed-air passage or chamber at one side of said wall, and a membrane-motor at the other side thereof, the latter being joined to said stem and having a blind chamber at its back, substantially as specified.

EMORY C. IIISCOCK.

\Vitnesses:

H. M. llIUNDAV, L. E. CURTIS.

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