US1193594A - James o connor - Google Patents

Description

J. O'CONNOR.

PUMP ER BELLOWS.

APPLICATlON FILED MAR 16, 1914- 1 ,1,93,594. Patented Aug. 8, 1916.

Witnesses: Inventor:

, his Attorney.

UNITED STATES PATENT OFFICE.

JAMES OCONNOR, OF NEW YORK, N. Y.

PUMPER-BELLOWS Application filed March 16, 1914.

To all whom it may concern Be it known that I, JAMES OCoNNon, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Pumper-Bellows, of which the following is a specification.

This invention relates to pumper bellows and has for its object to provide a device of the class specified, of high power and great promptness of response in operation.

To these ends my improvements comprise parts and combinations of parts illustrated in their preferred form in the accompanying drawing wherein Figure 1 is a vertical sectional elevation of a pumper bellows including my improvements. Fig. 2 is a fragmentary front elevation of a part of What is shown in Fig. 1, and Fig. 3 is a similar fragmentary front elevation of another portion of what is shown in Fig. 1. Fig. 4 is a sectional elevation similar to Fig. 1 illustrating the opera tion of the device. Figs. 1, 2 and 3 are to the same scale, and Fig. 4 is to a smaller scale.

Before describing the invention in detail, I desire to have it understood that the invention is not limited to the particular construction and arrangement of parts which I have illustrated and shall hereinafter describe, and that various changes may be made in the mechanism shown without departing from the spirit or scope of the invention, and that the phraseology which I employ is for the purpose of description and not of limitation.

My improvements are particularly applicable to the exhausting mechanism of player pianos, and in the figures of the drawing I have illustrated my improvements as applied to one of the well known types of pumper bellows, which are employed for exhausting the air from the operative mechanism of said player pianos.

Referring particularly to Fig. 1, the usual tension box 2 is provided with pipe 3 which may connect said tension box with any apparatus from which it is desired to exhaust the air. Bellows wall 4 is affixed to said tension box and may form one wall thereof. The second wall 5, movable relatively to wall 4, may be hinged at (3, in a well known Specification of Letters Patent.

Patented Aug. 8, 1916.

Serial No. 824,852.

manner, to said wall 4. Connecting said two walls 4 and 5, is the usual collapsible wall 7. For moving wall 5 toward and from wall 4, I afiix to wall 5 the usual ear 8 having pivotally connected thereto ooperating link 9. Ailixed to wall 4 is bracket 10, having stop 11 thereon for limiting the stroke of wall 5, and spring 12 is provided for urging wall 5 toward wall 4. Each of said walls 4 and 5 is provided with one or more air passage ports therethrough, and for alternately closing and opening said ports, the usual valves 13 and 14 respectively, are provided. These valvesmay be made of leather or other suitable material, and are illustrated as attached at one end thereof to the bellows walls respectively, and constrained to their operative positions by the usual spring, as 15 for valve 14. Heretofore, in devices of this character it has been customary to make the area of the ports in one wall substantially the same as the area of the ports in the other wall. \Vhen constructed with this equality of area. valve 13, over the ports in the fixed wall, is relatively slow or sluggish in closing, when the movable wall 5 starts on its return move ment toward wall 4. This slow closing of valve 13 is caused by the lack of suflicient pressure within the bellows to close said valve with desirable promptness and thus there is considerable leakage of air into the tension box, whereby the efficiency of the pumper bellows is materially stultified.

In accordance with my improvements, wherein the aggregate area of the ports through wall 5 is materially less than the aggregate area of the ports through fixed wall 4, there is, upon the commencement of the return stroke of wall 5 toward wall 4, an immediate pressure available in bellows 16, for closing valve 13 with great promptness, whereby leakage from said bellows into the tension box, or from the outer air through the bellows into the tension box, is prevented. By this arrangement, greatly increased efliciency is attained and the degree of vacuum maintained in tension box 2 is relatively high.

As illustrated in the drawings, the aggregate area of ports 40 in wall 4, is about three times the aggregate area of the ports 50 in wall 5. While I have found this to be a desirable proportion, said proportion may be varied, but the area of the openings in wall l should be materially greater than the area of the openings in wall 5.

In Fig. 1 I have illustrated the device with me ablewall 5 traveling in clockwise direction and nearing the end of its outer movement, valve 1st being closed and valve 123 of wall 4 being open. In Fig. at I have illustrated wall just starting on its return or anti-clockwise movement, whereby valve 13 is promptly closed by the pressure of the air within the bellows, and valve 14 has just opened to permit the air of the bellows to escape.

I claim:

1. Pumper bellows including in combina' tion a tension box, a bellows wall fixed to said tension box, another bellows wall mov able toward and from said fixed wall, means for moving the movable wall toward and from the fixed wall, an air inlet port leading from within the tension box to within the bellows, an air outlet port leading from within the bellows to without the bellows, an air inlet valve to said inlet port and an air outlet valve to said outlet port, said inlet port having a preponde 'ance of area over the area of said outlet port whereby when the movable wall is moved toward the fixed wall an augmentation of pressure is produced within the bellows for accele'ating the closing of said air inlet valve.

2. Pumper bellows including in combination a tensionbox, a bellows wall fixed to said tension box, another bellows wall movable toward and from said fixed "all, means for moving the movable wall toward and from the fixed wall, a plurality of inlet ports leading from within the tension box to within the bellows, a plurality of outlet ports in the movable wall leading from within the belle to without the bellows, an air inlet valve to said inlet ports and an air outlet valve to said outlet ports, said inlet ports having a preponderance of area over the area of said outlet ports whereby when the movable wall is moved toward the lixed all an augmentation of pressure is produced within the bellows for accelerating the closing of said air inlet valve.

Signed at New York, Bronx borough, in the county of Bronx and State of New York, this 13th day of March, 1914-, before two subscribing witnesses.

JAMES OCONNOR.

\Vitnesses ARTHUR COURON, Guns. P. BOGART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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