US1002072A - Pneumatic action. - Google Patents

Description

H. MEYER. PNEUMATIC ACTION.

APPLICATION FILED AUG, 1, 1908. 1,002,072. Patented Aug. 29, 1911.

2 SHEEN-SHEET 1.

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HERMANN MEYER, OF NEW YORK, N. Y.

PNEUMATIC ACTIQN.

1,092,032, Specification of Letters ?atcnt. Fatgnted Aug, 29, 1911,

Appli'cation filed August 1, 1908. Serial No. 446,458.

the tracker board. Each of the pipes K for the several pneumatics A extends-through a suction chamber N, connected with the main suction chamber or the suction device in any suitable manner, and each pipe K is provided with a bleed or leak hole K", opening into the suction chamber N, Fig. 1. Into the bleed hole K K extends the pointed end 0' To all whom it may concern:

Be it known that l, HERMAN}: Marian, a citizen of the United States, and a resident of the city .of New York, borough o the Bronx, in the county and State of New York, have invented a new and Improved Pneumatic Action, of which the following is a full, clear, and exact description.

' The invention relates to self-players, selfof each pipe of a screw 0,

playing pianos and like musical instruments, screwing in the front wall of the suction and its object is to provide a new and imchamber N, so as to extend to the outside proved pneumatic action having a bleed hole thereor, to permit the operator to turn the adjustment, to permit accurate and quick screw 0 from the outside with a view to move the pointed end 0 farther in or out in the bleed hole K, with a view to vary the size thereof, according to the direction in which the screw rod 0 is turned. when the screw rod 0 is screwed inward, the size of the bleed hole K is diminished, and when the screw rod 0 is screwed outward the size of the bleed hole Kis increased. When the size of the bleed hole is diminished, itrequires a lon er time for air to exhaust from the pipe K into the suction chamber N than when the opened more fully on screwing the screw rod 0 outward. In the diaphragm G screws the threaded stem P of a valve P, adapted to be seated on valve seats Q and Q, of which the valve seat. (,2 is fixed in the valve casing and the other seat Q is adjustably connected to the valve casing and is connected with a flexible portion A of the movable member A of the pneumatic A, as more fully shown and described in the application for Letters Patent No. 408,292, filed by me on December 27, 1907, so that further detailed description regulation of the diaphragms and valves from the outside, with a view to insure proper opening and closing of the pneumatics. 1

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claim.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specificatlon, in which similar characters of-reference indicate corresponding parts in both views.

Figure 1 is a cross section of the improvement as arranged within a piano; and Fig. 2 is a front elevation of the same.

The pneumatics A'are arranged in tiers and have their fixed members A attached to the rails B, and their movable members A connected with a lifter rod C, mounted to slide in suitable bearings arranged on the top.board D, secured to the front board E, which also supports the rails B. The upper end of each lifter rod C engages the under side of the front end of a corresponding jack rocker F of the piano action, so that when a pneumatic A collapses, then a swinging motion is given to 'the corresponding jack rocker F to actuate the corresponding hammer, with a view to sound the desired string. The diaphragm G foreach pneumatic A divides its chamber into an air chamber H and a suction chamber H, connected with the main suction chamber 1, in the front' board E and connected with a suction device of any approved construction. The air chamber H for each pneumatic is connected through the suction chamber 1 and connecting at its upper end formed in the top board 1), the end of the channel D being connected with a short pipe or nipple K, connected by the usual flexible tube L, with an opening in understood that other valves may be used in connection with the present improvement without deviating from my invention.

. The operation is as follows: tracker board opening is uncovered and air passes through the tracker board opening, the tube L, the pipe K, the channel D and the pipe J into the air chamber H, then the diaphragm G moves downward and consequently the valve P is moved from the seat Q, onto the seat Q, to cut off atmospheric air from the interior of the pneumatic A. At the same time the interior of the pneumatic A is connected with the suction cham- 1 her H, so that the pneumatic is collapsed and consequently the lifter rod C of this pneumatic actuates the corresponding jack rocker F for actuating the hammer an of this valve is not deemed necessary, it being as indicated in v Thus bleed hole K is l When a' sounding the proper string. As soon as the tracker board opening is again covered by the note sheet, then the diaphragm G returns and with it the valve mechanism to a normal position, as shown in Fig. 1, that is, the valve P moves back to the seat Q, thus discoi'inecting the interior of the pneumatic from the suction chamber H and connecting the interior of the pneumatic A with the at- 18 mospl'zere, to allow atmospheric air to pass to the previously collapsed pneumatic-to turn the same to open position. \Vhen the note sheet disconnects from the tracker board opening, air is drawn out of the pipe by way of the bleed hole K opening into suction chamber N, so that the pressure on. the top of the diaphragm G is reduced itlltl the diaphragm now returns to its origiposition shown in Fig. 1, so that atmosair -nasses into the pneumatic and ini' s the same. Now by having the bleed adjustment as shown and described, the time for reducing the pressure on the dialn'agm can be regulated to the minutest c it being understood that the flexiot the diaphragms varies, and by vary- .m the size of the bleed holes and causing quicker or slower reduction of the pressure in the air chamber H, the diaphragm is caused to act accurately and the action is rend red very sensitive.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent:

A pneumatic action for self-playing mu- 35 sical instruments having pncumatics provided with suction 'clmmbersand air pressure chambers, rails carrying the fixed members of the said neumatics, a front'board supporting the said rails and having main suction chambers connected withthe suction chambers of the said neumatics, pipes extending through the said main suction chambers and connected with the air pres sure chambers of the said neumatics, a top board having channels connected with the said pipes, an auxiliary suction chamber on top of the said top board, pipes extending through the said auxiliary suction chamber amil'connected with the said channels and with the tracker board, the said auxiliary suction chamber pipes having bleed holes opening into the said auxiliary suction chambenand pointed screws screwing in a wall of the said auxiliary suction chamber 55 and controlling the said bleed holes.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERMANN MEYER,

Witnesses TI-IEO. G. Hos'rnn, EvEnAnn B. MAnsHALL.

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