US829383A - Musical instrument. - Google Patents

Description

PATENTED AUG. 28, 1906.

F. s. BRASOR. MUSICAL INSTRUMENT.

APPLICATION FILED SBIT.19. 1905.

- UNITED STATES.

PATENT oEE oE.

FREDERICK! SU NER BRASOR. or MARIETTA, omo, ASSIGNOR or ONE- THIRD 'ro FRANK ASHLEY PILCHERAND ONE-THIRD T SAMUEL .s.

: PORTER, OF M ARIETTA, OHIO.

MUSICAL INSTRUMENT.

Specification. of Letters Patent. application 9d September 19,1905; Serial No. 279.119.

Patented Aug. 28, 1906.

T0 dllwyhohti it may concern:-

"Be itiknown that I, FREDERICK SUMNER Bimsoma citizen of the United States, residr t'rol and preferably is applied throughout the whole range of instruments which are in any wise mechanically struck or exposed to presi sure in orderto produce tones. In using. the

rinciple in a iano-player o erated by a perihrated roll I ave a box wit a middle board down its length, a valve in this middle board for every note that is to be played, and a tube to the corresponding pneumatic from every valve. Upon the middle board I rovide suction and below the middle-boar I provide blast.- I then run tubes oneway to the tracker board to control the valves and, as already stated, from the valves to the pneumatics to control the ke -strikers.' By this 39 means I am enabled to ghspense with all the primaries and their accompanyin complications which are found in many 0 the piano and organ players in use prior to my application. It is my intention tov have high and 5 low pressure in the suction-box of my main movement all the time, providing a stop action-and valves controlled thereby to let one or the other pressure into the said box.

I My invention willbe fully understood from the accompanying specific description anddrawing,.in which the figure shown is a sectional view through the suction and blast 'boxes and showing in full lines the valve in normal or unv'ented position and in dotted lines the valve in the opposite or vented po-.

sition.

Referrin to the drawing, which illustrates the princip es of my invention, 1 represents a rectangular box divided into two: com artments- 2 and 3, which will be'desi ated ereinafter asthe suction. and ast boxes. These boxesjor compartments are separated by a" partition 4, w fch' is provided with a recess 5, which connects b narrow openings 6 and 7, respectively, wit 1 the suction and blast boxes and in which a two-part valve 8 is adapted to operate, one part to close the conduit 10, which connects the aperture 5 andtube 9. At theopposite end of the tube 9 is a pneumatic 11 of any suitable type reed, or striker, as the case may be.

The blast-box is provided on its inside with a dia hragm 12, to which is connected a rod 13'an which in turn is connected to the valve 8. The compartment 14, whichis made 'by this (liaphragm,'has communication with the blast-box 3 by bleeding-duct 1 5 and is connected to the key or tracker board 16 by a tube 17, the function of-Which will be described later on. I

The numerals 18 and .19 represent, res ectively, the suction and blast pipes w 'ch make communication with the suction and blast boxes 2 and 3 from the suction and blast bellows.

It will be clearly understood that I may use the diaphragm 12 on the outside of the suction-boxes and have the suction and blast box transposed. This construction would make the operation the reverse of that'shown and the diaphragm 12 would be normally.

collapsed instead ofex anded.

In the operation of t e device, thevalve 8 is normally made to close the openingfi by reason of the blast of air from the i e 19 working back of diaphragm 12 throng leeding-duct 15. Now when the tube 17 and the com artment 14 are vented at the key or Mac er board the blast in compartment against the diaphragm more than equals the pressure exerted on the valve and the diawhich is adapted to operate upon the pipe,

phragm is depressed, carrying with it the valve-rod 13 and valve 8, thus closing the opening 7, and cutting off the blast to the pneumatic 11 and allowing the air thereinto 1 e sucked out. This action is very rapid, and

:the pneumatic is closed with a snap. When the .105

I iaphragm is returned its normal posi ion, the blast in chamber 3, acting through the bleeding-duct l5, restores the valve to its normal position.

'lhe operation in an instance where the blast and suction boxes are reversed as to the pos tion. shown in the figure would. be the same as regards pneumatic ll but the normal position of diaphragm '12 would be the opposite to that shown in full lines in the figure. When the tracker-board is vented by reason of one of its ports coming in communication with an aperture in the note- 1. A device of the class described comprising a suitable source of pressure, suction means, a single pneumatic connected to said pressure and said suction means, means for controlling said pressure and said suction, and means for alternately releasing the pressure and suction whereby they can act succcssively 0n the pneumatic.

2. A device of the class described comprising a suitable source of pressure, suction means, a pneumatic having a single connection with said pressure and said suction, a prossuremperated device, and a valve controlled by said pressure-operated device whereby the pressure and suction are adapted to alternately act on said pneumatic.

3. A device of the class described comprising a suitable source of pressure, exhaust means, a single pneumatic directly connected to said exhaust and said pressure, a pressureoperated diaphragm, and a double-acting valve connected to and operated by said diaphragm whereby it is alternately operated to admit pressure and allow exhaust.

4. In an automatic piano-player, the combination with a suitable receptacle, of pressure means connected to said receptacle, exhaust means connected to said receptacle, a hollow partition dividing said receptacle, exhaust and pressure ports in said partition, a valve adapted to alternately close each port, and means for automatically operating said valve.

5. In a device of the class described, the combination with a suitable receptacle, of pressure means connected to said receptacle, exhaustmeans connected to said receptacle, a hollow partition dividing said receptacle, exhaust and pressure ports in said artition, a valve adapted to alternately c ose each port, and a pressure-operated diaphragm connected to said valve and adapted to oper-' ate the same.

6. In a device ofthe class described, the combination with a suitable receptacle, of pressure means and exhaust means both connected to said receptacle, a partition dividing said receptacle, exhaust and pressure ports in said partition, a valve adapted to control the pressure and the exhaust, a pressureoperated diaphragm connected to said valve and adapted to operate same, and a single pneumatic operated by said pressure and said exhaust to alternately expand and contract as the valve is operated.

In testimony whereof I affix my signature in presence of two witnesses. I

FREDERICK SUMNER BRASOR.

Witnesses:

A. D. FoLLE'r'r, S. B. HOOPER.

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