US871123A - Cut-off for pneumatic musical instruments. - Google Patents

Description

.N 871,123. f PATENTED Nov. 19, 1907.

T 1;. DE KLEIST. GUT-OFF FOR PNEUMATIC MUSICAL INSTRUMENTS.

APPLICATION TILED JAN. 1a, 1906.

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GUT-OFF FOR PNEUMATIC MUSICAL INSTRUMENTS.

APPLICATION FILED JAN. 1a, 1906.

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No. 871,123. PATENTED NOV. 19, 1907. E. DB KLEIST. CUT-OFF FOR PNEUMATIC MUSICAL INSTRUMENTS.

APPLICATION nLnn JAN. 13. 1906. V a SHEETS-SHEET a.

M h'dyara flito r 11. e310 UNITED STATES PATENT ()FFHIE.

CUT-OFF FOR PNEUMATIC MUSICAL INSTRUNCENTS.

Specification of Letters Patent.

Patented Nov. 119, 1907.

Application filed January 1351906. Serial No. 295,915-

To all whom it (my concern:

Be it known that I, EUGENE DE KLEIs'r, a citizen of the United States, residing at North Tonawanda, in the county of Niagara and State of New York, have invented a new and. useful Improvement in Cut-Oil's for Pneumatic Musical Instruments, of which the following is a specification.

This invention relates to the cut-off devices employed in pneumatic pianos and other automatic musical instruments for cutting oil communication between the main bellows and the wind-chest during the automatic rewinding of the perforated music sheet. I

It is the object of my invention to provide a reliable device of this character which shall be simple in construction.

In the accompanying drawings consisting of three sheets 2 F igure 1 is a fragmentary front elevation of an automatic piano embodyihg the invention. Fig. 2 is an enlarged front elevation of the cut-ofi device. Fig. 3 is an end view thereof. Fig. 4 is a vertical longitudinal section of the same in line 4-4, Fig. 3. Fig. 5 is a transverse section inline 55, Fig. 2, showing the automatic suction regulating valve; Fig. 6 is a diagrammatic transverse section, on an enlarged scale, of the wind chest and the tracker mechanism.

Similar letters of reference indicate corresponding parts throughout the several views.

' A indicates the wind chest containing a pneumatic action of any suitable construction and A Fig. 6, the motor pneumatics which operate the customary stickers a which in turn act upon the piano-action, not shown.

B indicates the customary tracker board; C the perforated music sheet wound on .the rollers c c, D the air motor and E the driving gear of ordinary construction by which motion is transmitted from the motor to said rollers and which contains the usual reversing means controlled by the tracker board and music sheet, for automatically rewinding the latter after the last tune on the sheet has been played.

F is the 'tube or conduit which leads from the main suction bellows F and between which and the wind chest the cut-off device is interposed. This device consists of a box or case Gdivided by a horizontal partition 9 into two chambers G G", the lower one G being connected with the suction lows by the tube F and the upper one with the main exhaust cliannel of the rin-d chest A by a tube 9. These chambers com municate with each other by means of a port h formed in the partition (7 and con trolled by a valve h, preferably of the rock- The arm is suitably hinged at to the upper side of the case G and preferably )IOVlClGd on its under side with a strip j of cather or similar material which covers the hole through which the sticker lc passes, thus effectually excluding the outer atmosphere at this oint-when the arm is lowered, as shown by 1111 lines in Fig. 4.

The pneumatic I is secured horizontally to the underside of a bracket or support I and provided with. an expansion spring i of ordinary construction which normally causes its movable board to depress the arm 7', so as to hold the valve h cnen, said spring being more powerful than tile valveclosing spring h The pneumatic I is constantly connected with the lower chamber G of the cut-off case by a tube 1,, Fig. .2, so that the pneumatic is collapsed as soon as the main suction bellows is operated and remains in that 'conditionas long as the iii-- strument plays,

M is a-locking device for retaining the 7' in its depressed position so as to keep i valve it open durin the time that the pneumanic I remains col ape d. This locking device preferably consists of an upr' arranged above the arm j ,tween ,its ends to the i'JlftGli.

'zontal, pin .or screw 7l't,'iil6 lower arm of the ssed arm in the lever bearing upon the de normal vertical position of the lever. This lever is controlled by'a ne'umatic or bellows N 'which has its mova l'e board unected with the upper arm of the lever This neumatic is controlled 1) spending valve mechanism of the pneumatic action and a perforation of the music sheet 55 tions and permitting the use of a small perh.. Fig. "6 shows this valve -mechanism which preferably comprises the customary double puppet valve 1', r controlling the I usual air and exhaust ports 1' 1'? which com-j municate respectively. with the air chamber R and the exhaust chamberaR, the latter. chamber being connected with the upper chamber G of the cut-foil ,boxb y t-he tube 9'. The pneumatic is connected by a' tube 0 with the exhaust and flushing channel 1" of the corresponding valve mechanism. When the perforation of the music sheet corresponding to the pneumatic N registers with 'the com-; panion duct-of the tracker board, thepuppet valve 1", r is raised in a well known manner,

placing said pneumatic incommunication with the exhaust chamber R and collapsing it, while when said duct is covered. by the music sheet, the puppet valve descends, placing the pneumatic in communication with the air chamber R and expanding it. y p

The operation of the cut-oil device is as follows :When the instrument is not in operation, the pneumatics I and N are both expanded and the lever M occupies its locking position as shown by full lines in Figs. 3 and 4, thereby holding the cut-off valve it" open and placing the wind chest A in communication with the main suction bellows F; -When the latter is operated the pneumatic I is collapsed, as hereinbelore described, but the cut-off valve is held open by the locking lever- M. The parts remain in this position until the tune on the music sheet has been finished, when the perforation thereof whichcontrols' the-'cut-ofl' device registers with the corresponding tracker-duct and causes the un-i locking pneumatic N to collapse, thus disengaging the locking lever from the valve-operating arm j, allowing the valve h to close and cutting off the wind chest iromthe main suction bellows during the rewinding of the music sheet, which is efiected by the automatic reversal of the driving mechanism E, in a common manner. The lever Mis held in its unlocked position by contact with the adjacent edge of the elevated valve-operating arm j, thus preventing the unlocking pneumatic N from expanding under these condiforation or short slot in the music sheet for cont-rolling this pneumatic. After the music sheet has been rewound, the operation. of the main suction bellows ceases and the restoring pneumatic I therefore expands under the reaction of its spring z', its movable board depressing the arm and-causing the same to open the cut-oil valve h preparatory to the next operation of the instrument. The de-- vpressionoi the arm j releases the deflected ocking lever which is now returned to its locking position bv -the, expansion of' the pneumatic N ther eby holding the, cut-ofi valve open during the next operation of the instrument as hereinbefore described:

' Anautoniatic valve 0 is preferably combined-with the cut-off box or case'G for regulating the intensityof the vacuum produced in the same and the wind chestand hence the force with which the hanuners of the plane I action strike the strin s,

inner side 'of this port and preferably hinged to the outer wall of its case. It is yieldingly held closed by a spring-p appliedto its stem between a fixed bridge piece q extending across the outer side oi the port 1) and a screw nut or adjustableibutt-Qn qsmounted'. on the stem on theouter side of thebridgepiece. The spring pis so tensione'tl as torresist opening of the regulating valve 0 by the I atmospheric pressure under a-nprmal vacu; um in the wind chest, but soas to-permit the As shown in Fig. 5, I this valve isarrangerlm a case P-secured to valve to open to a greater or less extent when the vacuum becomes excessive,.the resistance of the valve being increased byscrewished by screwing it outwardly. Iclaimasmy invention: r

'1. A cut-off for'pneumatic musical instruments, comprising a case containing two ing the regulating nut q inwardly and dimin- I chambers connected by a passage, one of: said chambers having an air-inlet and the other an air outlet, a cut-off valve controlling-said passage, a pneumatic for opening said valve, retaining means [or holding saidrvalve open.

and a second pneumatic controlling said 1etaining means, substantially as setforth.

2. A cut-off for pneumatic musical instruments, comprising a case containing two chambers connected by'aipassage, one of said chambersha'ving an airinlet-and the rother an air outlet, a cut-off. valve controlling said passage, a pneumatic for opening sa1d valve, a locking lever for holding-said valve'open,

and a second pneumatic controllinp saidlocking lever, substantially as set forth.

3. A cut-oil for pneumatic musicaldnstruments, comprising a case containing two chambers connected by a passage, one of said chambers having an airjinlet and -the other an air outlet, a, cut-off valve controlling said passage, a pivoted arm arranged outside of said chambers and acting upon said valve to open the same,-a pneumatic acting on said arm, a locking lever cooperating with said arm, and a second ncumatic controlling said locking lever, su as set forth.

4. A cut-off 'fo'r pneumatic musical instrustantiallyments, comprising a case containing two chambers connected by a passage, one of said chambers having an air inlet and the other an air outlet, a cut-oil valve 'controlling said passage, a pivoted arm arranged outside of said chambers, a rod interposed between said arm and the cut-oil valve, .a valve-opening pneumatic having its removable board arranged to act on said arm, a locking lever cooperating with said arm, and a second pneumatic having its movable board connected with said locking lever, substantially as set forth.

5. 'A cut-oil for pneumatic musical instruments, comprising a case containing two chambers connectedby a passage, one of said chambers having an air inlet and the other an air outlet, a cut-off valve controlling said passage, a pivoted arm acting on said valve to open the same, apneumatic acting on said arm, a locking lever for said arm pivoted to swing at an. angle thereto, the lever when in iosition to unlock the arm being arranged to bear against the side thereof, and a second pneumatic connected with said lever, substantially as set forth,

6. In a pneumatic musical instrument,

the combinationwith a suction bellows, a.

wind chest and a pneumatic action, of a cutoll' comprising a case containing two chambers connected by a passage and connnunieating with the suction bellows and the wind chest, respectively, a cut-0H valve controlling said passage, a pneumatic for opening said valve, retaining means for lmlding said valve open, and a second pneumatic controlled by the pneumatic action and controlling said retaining means, substantially as set forth.

7. In a pneumatic musical instrument, the combination with a suction bellows, a wind chest and a pneumatic action, of cutoll' comprising a case containing two eham hers connected by a passage and communicating with the suction bellows and the wind chest, respectively, a cut-oil valve controlling said passage, a pneumatic constantly conununicating with. the suction bellows and arranged to open said valvewhen expanded, retaining means for holding'ibaid valve open, and a second pneumatic controlled by the pneumatic action and controlling said retaining means, substantially as set forth.

8. ln pneumatic musical instrument,

the combination'with a suction bellows, a wind chest and a pneumatic action, of a cutoff comprising a case containing two chambers connected by a passage and communicating with the suction bellows and the wind chest, respectively, a cut-oil valve controlling said passage, a pneumatic constantly com municating with the suction bellows and arranged to open said valve when expanded, a locking lever for holding said valve open, and a second pneumatic controlled by the pneumatic action and controlling said lever, substantially as set forth.

9. In a pneumatic musical instrument, the combination with the wind chest and the main suction bellows, of a cut-oil device interposed between the wind-chest and said bellows, and having a passage for the ad.- mission of the atmosphere, and an automatic regulating valve controlling the last-named passage, substantially as set forth.

10. In a pneumatic musical instrument, the combination with the wind chest and the main suction bellows, of a cut-off comprising a box or case containing two connected chambers communicating with the wind chest and said bellows respectively, a cut-off valve controlling the passage between said chambers, the cut-oil box having .a passage for the admission of the atmosphere, and an automatic regulating valve controlling the last named passage, substantially as set forth.

11. In a pneumatic musical instrument, the combination with the wind chest and the main suction bellows, of a cut-oil comprising a box or case containing two connected chambers communicating with the wind chest and said bellows respectively, a cut-off valve controlling the passage between said chambers, the cut-off box having a passage for the admission of the atmosphere, it regulating valve applied to thc last-named passage, a spring for resisting the opening movement of said regulating valve, and means l'or regulating the tension of said spring, substantially as set forth.

\Vitness my hand this 6th day of J anuary, 1906.

EUGENE Dr] KLEIST.

Vfitnesses C. F. GEYER, E. M. GRAHAM.

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