US176724A - Improvement in pneumatic actions for organs - Google Patents

Description

T. WINANS.

- PNEUMATIC ACTION FOR OFRGANS.

No.176,724. Patented Apri12,1876.

N- PETERS, PHOTO-LITHOGRAFHER. WASHMGTON. D, C-

UNITED STATES PATENT- OFFICE THOMAS wInA vs, or tem-oat, MARYLAND. IMPROVEMENTINPNEUMATIC ACTIONS FoR ORGANS.

Specification forming part of Letters Patent No. 1 76,72 1, dated April 25, 1876; application filed April 5, 1876 To all whom it may concern:

Be it known that I, THOMAS WINANS, of Baltimore, Maryland, have invented certain new and useful Improvements in Pneumatic Actions for Organs, of which the following is a specification E My present invention relates particularly to the pneumatic lifters for the pallets or valves which control the admission of air to the organ-pipes; and it is an improvement on the pneumatic valve-lifters described in my Letters Patent No. 153,148, dated July 14, 1874,

and No. 162,450, dated April 20, 1875.

I now make use of an annular metal frame, provided at its base with laterally-projecting ears, to take screws or pins, by which it is fastened to the sound-board, and closed at one end by a flexible diaphragm, which carries internal and external piston-disks of different areas, as described in my Letters Patent No. 153,143.

The valve-lifter thus formed is applied directly to the inner or outer face, as the case may be, of the bottom of the wind-chest, the device being available for use whether located inside or outside the wind-chest.

.To obviate the necessity for a valve or pallet, which must be held in place by special guides for the purpose, as described in my Letters Patent No. 153,143, I fit to the sound-board, and within the wind-chest, an auxiliary cleat or strip, perforated to correspond with the admission-holes in the sound-board, and designed to decrease the distance between the valve or pallet and the aperture to be closed by it.

The accompanying drawing represents my improved valvelifter under two different arran gementsthe one applicable to valvelifters arranged inside the wind-chest, and the other to those outside the wind-chest.

The drawing represents each device in vertical central section. Only so much of the organ is represented as is needed to explain my present improvement.

In each example the valve-lifter consists of an annular metallic frame, A, with laterallyprojecting ears a, to take the screws 0, which bind it to the wind-chest, and it is closed at one end by a flexible diaphragm, b, carrying outer and inner piston-disks c d, of difiere'nt;

areas, substantially as and for the purposes set forth-in my Letters Patent No. 153,143..

The valve-lifter on the right of the drawing is arranged inside the wind-chest B, and is fastened directly to the bottom of the same, over the passage f, through which compressed air is supplied to or exhausted from the interior of the lifter. The case A contains a light spiral spring, g, which serves to press and hold the diaphragm upward when the airpr'essures'from above and below upon the diaphragm are equalized. To guide and center this spring the case A, for a portion of its length, has a diminished internal diameter, as

shown, andin this contracted part the spring is received.

The outer disk 0 serves as the pallet or valve to control admission of air to the pipe through the aperture h. This aperture is formed in the sound-board O, and also in the auxiliary cleat or strip G,which is added as a fixture to the under side of the sound-board, to decrease the distance between the valve and the pipe-opening h, for the purposes hereinbefore mentioned. The valve is'represented as open, and for this purpose air-pressure has been removedfrom below the diaphragm, thus permitting the pressure in the wind-chest to overcome the spring and depress the valve.

The device described is most compact, cheap,

and simple, and can be applied conveniently and rapidly to the wind-chest.

All parts of the device are contained Within the compass of the case.

The valve-lifter on the left of the drawing is arranged outside the wind-chest, and is fastened directly to the bottom of the same. This arrangement is the reverse of the one previously described, and necessitates reversing the position of the piston-disks, the larger disk at being outside. The valve, also, is lowered by the outward expansion of the flexible diaphragm, due to compressed air admitted through passage f to the interior of the case, which, bearing against the large piston-disk d, overcomes the resistance oifered by the spring '6, plus the pressure of the wind in the wind-chest against the under side of the valve or pallet 70. The valve k, in this instance, is

added to the lifter, and is supported by a stem,

j, which passes up through the bottom of the wind-chest, and is encircled by the spiral spring 2', confined in place between the valve L and the bottom of the windchest. The auxiliary cleat or strip 0 is, with this valve, brought down even nearer to the bottom of The Wind-chest an it is unde the other an ran g'e m ent.

What I here claim, and desire to secure by Letters Patent, is.

1. The pneumatic valve or pallet lifter, formed of an annular metal case with lateral ly-projecting ears or lugs, closed at one end by a flexible diaphragm carrying inner and outer piston-disks, as described, adapted for application to the bottom of the wind-chest, either outside or inside the same, as set forth.

2. The pneumatic lifter and valve, constructed and applied to the wind-chest, substantially as described, in combination with the sound-board and auxiliary perforated cleat or strip, attached to the sound-board, and located within the wind-chest, as and for the purposes set forth.

3; The annularmctallic case and its flexible .,dia1 )hragm and piston-disks, in combination with the spring, inclosed by, and held in the conbracted'portion of, said case, substantially as set forth.

In testimony whereofI have hereunto signed my name. this M11 day of April, .A... D, 1876.

THOMAS WINANS.

Witnesses:

' H D- HIsTLER, GEO. WQiwnINGT .Nt

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