US651788A - Automatic piano. - Google Patents

Description

No. 65|,788. Patented June 12, I900. J. WIESEB.

AUTOMATIC PIAQNO.

(Application filed June 22, 189B. Renewed Dec. 6, I899.) -(llo lodol.) 8 Shasta-Shoot l.

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No. 65,788. Patented June 12, [900.

- J. WIESER.

AUTOMATIC PIANO.

(Application filed June 29, 1898. Renewed Dec. 8, 1899.)

8 8heets-Shoei 2.

(No Model.)

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u: NORRIS PETERS o0, PuoTc-umo WASHINGTON. r.v c.

No. ssmss.

Patented June' l2, I900. J. WIESER.

AUTOMATIC PIANO.

(Application filed June 22, 1898. Ranawed Dec. 6, 1899.)

8 Sheets-Sheet 3.

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.1. WIESER.

AUTOMATIC PIANO.

(Applicatipn filed June 22, 1898. Renewed Dec. 6, 1899.)

Patented lune l2, I900.

8 Sheets-sheaf 4.

(No Modal.)

THE uonms PETERS coy, PHOTOUTNQ. WASHINGTON. n. c.

0- 0 H m.) e n u I. d e t n e t a P R E S E W L 8 8 H 6 D N AUTOMATIC PIANO.

(Application filed June 22, 1898. Renewed Dec. 6, 1899.)

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(No Model.)

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m: NORRIS PETER$ 00.. PHOTO LITHO., WASHINGTON. u. c,

No. 65!,788. Patented lune l2, I900. J. WIESER.

AUTOMATIC PIANO.

(Application filed June 22, 1898. Renewed Dec. 6, 1899.)

8 Sheets-Sheet 6.

(No Model.)

INVENTO R ATTORNEYS.

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No. 65!,788. Patented June 12, I900.

, J. WlESEB. AUTOMATIC PIANO: (Application filed June 29, 1898. Renewed Dec. 6, 1899.)

8 Sheets-Shoat 7.

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' m mmal v No. 65I,788. Patanted lune |2-, |9oo.

J. WIESEB.

AUTOMATIC PIANO. (Application filed June 22, 1898. Renewed Dec. 6, 1899.)

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(No Iodol.)

ATTORNEYS m: Norms PETERS cov wuofmumcu WASHINGTON, o. c.

1 UNITED STATES PATENT OFFICE.

JOSEPH WIESER, or DOLGEVIL'LE, NEW YORK, ASS'IGN'OR, BY MESNE ASSIGN- MEN'l-S, or ONE-HALF TO HERMANN LEONARD, on NEW YORK, N. Y.

AUTOMATIC PIANO.

sPEcIFIcA'LrION forming part r Letters Patent No'. 651,788, dated June '12, 1900.

Application filed June 22, 1898. Renewed December 6, 1899. Serial No. 739,431. No model.)

matically-operateddevices controlled by a perforated music-sheet, a pneumatic-motor,

and a suitable wind-chest and suction appar ratus and in'which'the expression is produced by the action of the pneumatic mechanism, likewise controlled bythe perforated music-sheet, without requiriu g any personal exert-ion; and the invention consists of ,cermm features of construction and combination of parts to be hereinafter described and then particularly claimed.

In the accompanying drawings, Figure 1 represents a front "elevation of an upright piano in which the lower part of the case is broken 'off, so as to show the pneumatic-operating mechanisms. Fig; 2isa horizontal section on'line 2 2, Fig. -1, of my improved au-. tomatic .piano, showing the dilferent'mechanisms, arranged partlyinside and partly outside of the case, by which the piano-actions are operated. Fig. 3 is a vertical transverse section through the key-beds, musicsheetcarrier, and wind-chest, drawn on a 5 larger scale and showing the primar valveaction and pneumatics for operating the key levers and piano-actions. "Figs. 3 and 3 are details of the locking mechanism for the music-sheet carrier. Figs. 4 and 5' are re- 0 spectively a detail vertical transverse section on line 4 4, Fig. 6, and a rear elevation of the k'cy-lever-operatin g pnenmatics and litterrods. Figs. 6 and 7 are bottomfviews of the music-shcet-winding'up mechanism shown,

5 respectively, in. its normal position for use and in position for rewinding. Fig. 8 is a vertical transverse section through the piano, showing the means for pneumatically actuating thehammer-restrail. Figs. Qand 10 are detail side views of the mechanisms for ac- :tuatingt-he hammer-rest rail, showing the pedalp'iieu matics is given.

same in normal position and in shifted position for reducing the strokes of the hammers. Fig. 11 is also a vertical transverse section throughthe piano, showing the mechanism for pneumatically actuating the dampers. Figs. 12 and 13 are detail views, drawn on a larger scale, of said damper-actuating mechanism, showing the damper respectively in normal position on the string and in position after being removed from the string; and Figs. 14 and 15 are details of the'auxiliar-y valve-actions and pneumatics employed for setting theexpressiou mechanisms.

Similar letters of reference indicate correspending parts. In my improved automatic piano any approved construction of upright piano may be employed, the pneumatic-operating mechanisms being arranged. in connection with the key-levers of the piano-actions, said key-levers beingactuated by means of operatingpneumatics, which are arranged ,outsideof the regular wind-chest, and controlled by a series of primary valve-actions that are 10- 1 cated in the wind-chest and connected with a tracker arranged below the kcy-bed'of the piano. The piano isoconstructed with the usual piano-actions A, sounding-boand-B, strings S, and supporting-frame F. On the rear part of the frame F is supported an'electric or other motor of any'approved construction, by which motion is imparted to a pair of suction-bellows SB, which are arranged in the lower portion of the piano-case, respectivcly above and below'a hollow shelf,

as shown in Fig. l. A pneumatic-motor M is also arranged at the rear part of the frame F, said motor furnishingthe power for driv; ingthe music-sheet and rewinding the same 0 at the proper time.- The suction-bellows SB are connected by ducts with anauxiliary bellows FB, which is again connected by'a flexible tube 0' with the wind-chest O, which,

is located below the key-bed -K of the piano, 5

and with the auxiliary pneumatics P,by which .the expression devices are operated, said auxiliary'pneumatics performingthefunction of the piano-pedals when the piano is played automatically. To these pneumatics the term zoo The pedalpneurnatics are operated by the auxiliary 5 that surrounds the wind-chest.

Patr cia, Jim: \weil bellows, one for-shit ting the ham mer-rest rail of the. piano-actions and the other-for operis played manually in connection with the T he pedal operated' expression devices. wind-chest O' is exhausted by the action of the auxiliary bellows FE and suction-bellows "SB. Below the wind-chest 0, outside of the 'same, are arranged, preferably, three rows or tiers of bellows, whichjgrm the operatingpneumatics OP'for the lifter-rods 1 oi the key-levers 'L, said lifter-rods being applied,

. by means of pins Z, to the movable projecting members of the pneiimatics OP, as shown in Fig. 3. The upper ends of the litter-rods engage shorter intermediate lifter-pins which are guided in' suitable keepers at the rear part of the key-bed, said intermediate lifterpi-ns being retained in their position, so as to permit the removing or replacing of the lifterrods 1. The operatingpneumatics OP are connected by suitable ducts and leader 0 with the windchest, within which are arranged the primary or controlling valve-actions V, which are connected by flexible pipes t with the ductsof the tracker T, said tracker 0 being ar ranged on the under side of a horizbntal slide-frame T, that is guided in suitable ways 10 below the key-bed. To the slidefra ne T is attached, at right'angles thereto, apartition T which carries the wind-chest 5 G and theoperating-pneumati-cs OP, so that the tracker, wind-chest, operating-pneumatics, and lifter-rods can be moved in forward y direction when the lower front wallof the piano-case is removed and'detached bodily '40 from the piano whenever it should be HSCGSf sary for inspection and repair.

The primary orcontrollingpneumatic valveactions V are arranged at the interior of the wind-chest C and are composed of flexible diaphragms d, arranged'on a horizontal bed (1, the space below the same being connected by channels and flexible tubest with the ducts of the tracker. On each diaphragm dis su penlarged lower end of a stem (2 of r d, bywhich the connection of the 1 wind-chest with the. leader (D -is opened or closed. The valve-stein (2 passes through an opening in the top of the wind-chest (J and through a'cap (Z in the top'of the leader 0 The valve (1 is located above the opening in the top of the wind-chest, the flushing of the diaphragm lifting the valve-(Z so as to establish the connection between the wind-chest-and the leader and close thefycap d, which serves to guide the upper end of the valve-stem. The cap d is perforated, so as to permit the atmospheric air to enter into the leader C as soon as the valved is returned to its normal po siti'on to close the opening in the top of the wind-chest. As soon as the diaphragm is flushed the connection of the Windches't with the leader is established, while the conned tion of the leaderwith theatmosphere is closed, and,-vioe versa, when the connection of the wind-chest and leader is interrupted by the valve'the leader is connected with the,

atmosphere. Each valve (Z can be adjusted on its stem so as to produce the reliable opening and closing of'the openings-or parts in the wind-chsta-nd leader. The d-iaphragms, valves, and guide-caps are arrangedin three rows, corresponding, to the three rows of operating-pneumatics, one diaphragm, valve,

'and guide-cap forming the connection of the wind-chest by the leader with its corresponding pneumatic OP.

' The action of the valve-actions V and of the pneu n atics OP controlled thereby is governed by suitable perforations of the musicsheet passing over the ducts of .t e tracker.

The flexible tubes 25, by which tl e trackerducts are connected with the ducts in thediaphragm-bed cl ofi the"wind-chest,' are lbcated'in a recess t jof the slide-frame T, as

shown in Figs. 2 and 3, conductedthroligh holes in said f raine, and connected with the channels or ducts below the flexible dia- .phragms; 'Each trackr dnct is ,thus c'o' n' nected with a controlling-diaphragm (landprimary valve-action, so as to cause the flushing of said diaphragms' and the'actuation ofthe valves supported thereon and ofelhe corresponding operating-pneumatic connected therewith. The operating-pneumatics OP. when connected with the exhaust-chest C by means of leader .0 are collapsed and actuate the lifter-rods Z; connected with theinmovable members, which lifter-rods operate the intermediate lifter-pins I? and actuate the key-levers L and by the samein the usual manner the piano-actions. The intermediate lit tor-pins I remain in positionwheu the slideframe-T is'removed, with the wind-chest-opcrating pneumatics and lifter-rods, and re- .snme their position on the lifter-rods when "the slide-frame, with the wind-chest, is replaced, so as to operate the key-levers and piano'actio'ns, as befo'redescribed. The piano-actions are thus operated by the combined action of the m usic-sheet, tracker, flexi-Y blc tubes, valve-actions, and operating-pneumatics in a reliable and efifective manner, while all thepart-s can be bodily removed with the slide-frame T from the piano-case for the convenient repairing and readjustingofthe same.

' T he expression merhanisms T he express,1-on,which is ordinary produced in playing the piano by touch of the fi'ngers on the'key's,

'as well as' by the dampers being removed from the strings by the damper-pedal, is-in my im-.

proved pneumatic-piano imparted by auxil-f iary valve-actions and pneumatics which areactuated by special perforations ranged, in the music-sheet and by primaryva ve-actions in the wind-chest. For this purpose twosep- 'arate valve-actions and pneumatics P P are required, one by which the h'ammenrest rail or other devices.

is set so that the strokes of the hammers are shortened and the strikin force of the same diminished and the other corresponding to the damper-pedal by which the dampers are removed from or reapplied to the strings. By these auxiliary'pneuznatic devices the expres sion devices are operated in an entirely automatic manner without any special manual devices for producing the action of the same. In other words, with the exception of the inserting of the music-sheet, looking or releasing its winding-up mechanism, and starting the-motor, the playing of the piece of music is accomplished automatically and without reqniringany manipulation of stops, swells,

has been inserted and started the entire piece is played automatically with all the forte, piano, and sostennto expressions reqnired, all being governed by corresponding perforations in the music-sheet and the auxiliary valve-actions and pnenmatics which actuate or release the expression devices. The anxiliary valve-actions and the mechanism for regulating the forte'and piano expression are shown in Figs. 8, 9, 10, and 14, and consist of a movable hammer-rest rail '1' and a pair of operating-pneumatics 1'' r which are actuated at the proper time in connection with an aux liary valve-action I P, arranged at the bottom of 'the case, as shown in F 1 mediate mechanism shown in Figs. 9, 10, and

and .14. Above the auxiliary valve-actionF '1'" being connected with the valve r so as to open the same andv establish direct .connec-- tion between the operating-pnenmatics r, and the suction-bellows SB by the flexible tube 1' channel or duct 1', and tube 0'. A direct powerful suction is thus exerted on the operating-pneumatic a" and the hammer-rest rail r, operated by the pull-rod r and the inter- 14. The pull-rod i' connect-s the operatingpneu ni atico'? with a pivoted lever N, which acts by an an-tit'riction-roller"r on a second fulcru med and spring-actuated lever 0", that is connected by a lifter-rod r with a stationary arm 9 on the hammer-rest rail. The harnmer-rest rail 1' is connected by pivot-links '1' with the action --snpporting standard and. moved by the action of its operating-pnen-.

I tion of the pull-rod r and the operating pneumatic a", which is operated either in the strokes for the forte expression.

As soon as the music-sheet same manner as the pneumatic r, or, preferably, directly from a primary valve-action in the wind-chest, as the release and return of the ham mer-rest-rail operatin g parts requires less power than the upward moving or shiftin g of the same for piano expression. As soon as the pneumatic r is operated the T-shaped lever r is moved back into the recess on the lever r and the levers r and r returned to their form er positions, together with the hammer-rest rail, partly by gravity, partly by spring action, as shown in Fig. 1, so that the hammers then resume their former full The same actuating mechanism, but with the operatingpneumatics r a in re ersed position, is used for actuating the damper-levers of the pianoactions, so as to produce the removal of the dampers when sostenuto expression is reqnired. This mechanism is shown in Figs. 11, l2, l3, and 15, and consists likewise of two operating-pneumatics 1" 7- which are aciary valve-action P and operatingpneumatic P, In thiscase, however, the operatingpneumatics 1" r are reversedthat is to say,

they are so placed that their movable members are below the stationary members, so

0- and ush-rod r a crank-lever 1' andb Y the latter the damper-levers 1" are operated, and thereby the dampers removed from the strings, as shown in Fig. 13. When the damtions, the intermediate levers are returned to their former position, as shown in Fig. 12, by the-action of the second operating-pneumatic r and the T-shaped lever r in the same manner as before described in connection with the hammer-rest rail. 7

The music-sheet carrier.-.-The music-shes -is wound on a spool E, and the latter is supmusic-sheet spool is located in front and the winding-up roll at the rear of the tracker T.

' Both the music-sheet spool and the winding-up 'pers are to be returned to their normal posiroll E are supported in suitable bearings, the

bearings o f't-he former beingarranged in stationary brackets on the slide-frame T and the bearings for the latter in brackets that .are

attachedto the hinged U-shaped frame 1r,

which extends around the tracker T, The frame E is firmly locked in position at the under side of the slide-frame by means of a spring-catch e, that is clearly shown in detail in Figs. 3* and 3". The spring-catch e is fulcrumed to the under side of the slide-frame and actuated by the longer arm of an elbowlcver e, which engages a rearwardly-extending portion or heel c of the spring-catch e. The elbow-lever e is fulcrnmed to an ear e at the under side of the slide-frame T, its

short-er arm being connected by a stout wire or wire cord 6 with a second elbow-lever e, that is fulcrumed to the under side of the slide-frame, near one end of the same, said second elbow-lever being actuated by a slide- 'rod e from the front of the instrument, as

shown in Fig. 6. The sliderod e is guided bya slotted portion on a headed stud e at the under side of the slide-frame T, as shown in Fig". 6 and 7, so that when the slide-rod 1"? is pulled by taking hold of the knob or bur m at its front end the spring-catch eis .nih-

- slightly-inclined position.

gaging by a pin e the' slotted rear end of the fnlcrumed latch 6 so as to move 'it sidewise into a recess e at the edge of the carrierframe and permit the latter to' drop downward in-to inclined position, together with the winding-up roll, as shown in dotted lines in Fig. 3. When the winding-up roll is in this position, the loop at the end of the perforated music-sheet can be readily connected with the hook on the winding-u p roll E after the musicsheet'sp'ool has been inserted into the heads of jets or hangers.

the journal-bearings of the stationary brack- The hinged carrier-frame E is then returned into its normal position below the 'slide frame and the music-sheet stretched thereby over the du'c'tsin the face of the tracker. Asthe hinged carrier-frame is moved. in backward and upward direction its edge presses the spring-catch 6 back, so

as to permit it to pass beyond the same until it forms'contact with. the under side of the slide-frame. T, when the spring-catch will spring forward so as to reeu gage the rear edge of the carrier-frame and lock it into position. The slide-rod e is then pulled back-into its normal position, so that the latch e extend over 'the rear edge of the carrier-frame; as shown in Fig. 6; The music-sheet is then gradually wound on the winding-up roll by the action of the pneumatic-motor M, said motor being supplied with air from the auxiliary suction-bellows. The driving-shaft m of the pneumatic-motor M is provided with a balance-wheel m at one end and a driver pulley m at the opposite end, which latter is connected by a belt or cord m with a pulley .m on. an intermediate shaft m supported in bearings at the under side ofthe slide-frame, said shaft being provided with a pinion m, that meshes'with a gear-wheel m at one end' of the winding-up roll E.- As. soon as the winding-up roll E is returned to its normal position and the mnsic-sheet stretched over the tracker the electric or other motor M, by

which the suction-bellows are operated, is

as to impart by the-belt-and-pulley transmisup' roll E in the direction of the arrow shown in Fig. 3, so that the music-sheet is moved over the trackeruntil it is entirely transferred to the winding-up roll4that is to say,

As soon as the music-sheet is entirely unwound from itsspool a perforation at its end actuates a primary valve-action in the windchest and-a corresponding operatin -pneumatic OP, which latter operates the elbowlever e" by a connecting-rod e and Withdraws the locking-catch e from the carrier-frame, so as to permit it to drop on the recessed end of the latch e 'lhisslight drop motion of the carrier-frame due to the recessed latch moves the gear-wheel'm on the winding-up roll out of mesh with the motion-transmitting pinion m, so that no further rotary motion is imparted to the winding-up roll. Another perforation near theend ofthe music-sheet actuates next to and operates the sliderod c by its elbowlever e. and rod e, so as to shift the latch e and .drop the carrier-frame into inclined position. Simultaneously therewith the operating-pneumatic OP operates a fulcrumed lever e connected with the elbow-levcr cqand push-rod a so that a slide 6 in'the' suctiontube C of the wind-chest is closed thereby, so that the action of the wind-chest and primary valve-action is automatically interrupt- -ed. Before a new piece can be played itis played on the spool, so as to permit the removing of the same a d the replacing of the plished while the inged carrier-frame is in its inclined position below the music-sheetspool, as show'n in dotted line'sin Fig.3. Si-

.ri'er-frame the longitudinal slide-rod e moves a pin on on a clutch-pulley m splined to a clutch-pin m on the same, so as to impart rotary motion to the spool of the music-sheet by a belt m which passes over the clut h-pulley and a pulley m" on the shaft of the yielding head of the music-sheet spool, so that the music-sheet spool is turned in a direction opposite to its former unwinding motion, and thereby quickly rewound on the music-sheet roll. Ass00 sheet on the roll is accomplished the loopat its end is automatically detached from the hook on the winding-up roll. Themusicsheet spool is then removed from its heads and replaced by a new m'usic-sh'eet in case another piece is to be played. The loop at the end of this music-sheetis-then connected with the hook on the winding-up roll and it's carrierirame returned into its locked position below the slide frame in thef-manner' before deuntil the entire piece of musichasbeen playedj a primary valve motion in the wind-chest and an operating-pneumatic OP connected theresame by another mus c-sheet. This is accommultaneously with the dropping of the car the pneumaticunotor M is set in 1notion,so

sion described rotary motion to the windingnecessary to rewind the music-sheet vjust the intermediate shaft m into contact with as the winding of the musicl tem; w

. scribed, it being then immediately readyfor playing the next piece, as the hinged carrier- 'frame is not only relocked by its spring-catch,

but also rengaged by the latch. The return of the latcli'into its locked position (shown diate shaft andreturns the geanwheel 'm" on the winding-uproll into mesh with the driving-pinion m so that thereby the normal position of the parts is reestablished and the newmusic-sheet moved over the tracker. The

, latch-operating pull-rod e reopens the slide e, by which the tube leading to the windchest, is opened, so that the wind-chest can be exhausted and the. primary valve-action and operating-pneumatios operated by the music-sheet and tracker. The rewinding of the music-sheet takes place automatically as soon as the piece-of music has been played; while the pneumatics operated thereby, and consequently the piano-actions, are at rest. The resetting of the carrier-frame resets all the parts and starts the playing of the next piece.

Operation: The operation 'ofmy improved automatic piano is as follows The hinged carrier-frame on which the winding-up roller is supported is first released from its spring catch by the actuating-rod arranged for this purpose, so that the frame drops onto the reccssed end of the latch.- '.This latch is then released .from the hinged carrier-frame by pulling the second actuating-rod, so that the carrier-frame is dropped into its inclined positionf The music-sheet spool is then inserted into position in the heads of its brackets and the loop at the end of the music-sheet attaohed to the hook on the windin,2;-uproll.-

When this is-accomplished, the hinged carrier-frame is returned to its horizontal position below the slide-frame and automatically relocked by its spring-catch, after which the latch is returned into its former normal position. The return motion of the hinged car'- rier-frame brings the music-sheet acrossthe fac'eof the tracker, sothat its perforations are passed over the tracker-ducts when the music-sheetismoved by the rotating motion tions.

of the winding-up roller. The notor is now started and the pneumatic-actions set in op eration by the perforations of the music-sheet,

so that the music is played by the actuation of the pneumatic key-levers and piano-ac- The speed of the movement of the music-sheet over the tracker is regulated by a .prope'r adjustment of-the'air-admission slide 'sheet, so that the carrier-frame drops on its flushes the primary pneumatic valve-actions by which the corresponding pneumatics and their lifters are operated, the latter being forced against the rear ends of the key-levers, so as to force them upward, whereby the pianoactions are operatedin the usual manner as uthough the front ends of the keys were dere'ssed by the fingers. Thus as the'various perforations of the music-sheet are brought over their tracker-ducts the corresponding j pneumatics are operated and the various notes are sounded in accordance with the requirements of the piece of music to be played.

The expression is likewise automatically controlled by perforations of the music-sheet and 8o auxi iary pneumatics, so that'- either forte, piano, or sostenuto expression is produced,

as required. The expression-pneumatics res'pond'quickly as the perforationsin the music-sheet are passed over the hacker-ducts, so that the faithful reproduction of the piece of music is obtained. When'the music-sheet is entirely wound up on the winding-up roll, the carrierframe is automatically released from the spring-catch by the action-of the music- 0 latch, whereby its gear-wheel on the. wind-' ing-up roll is disengaged from the drivingpinion' and the motion of the winding-up roll immediately interrupted. The latch is then released and the'carrier-frame dropped automatically into inclined position. Simultaneo-usly the valve of the'wind-chest is closed 'by the latch-actuating rod, so that the oper..ting-pneumatics are set at rest. At the too same time the clutch pulley is placed by the latch-actuating sliderod in engagement with the belt-and-pulley transmission, of the -pneumatic-motoryso'that motion'is imparted to the musics sheet spool, and the music-, r95

sheet'is quickly unwound from the winding- 1 up roll and rewound on the music-sheet spool, its loop end detaching itself automat ically from the hook on the winding-up roll. The music-sheet, with its spool, is then reno mo ed and the winding-roll, with its carrierframe,.returned in its normal horizontal po- 1 sition below the slide-frame when the playing of the piano is to be discontinued. When the same or another piece is to be played, a

newmusic-sheet is placed in position in and connected with the winding-up roll and moved with the carrier-frame into normal position. In the former case the driving motor is stopped, while in the latter'ca se the motion 12o is kept up continuously, the next piec'e commencing to play aslsoon as the music-sheet is replaced in positic. rover the tracker.-

Having thus described my invention, I

. claim as newan'd desire to secure by Letters 125,

Patent-- 1. Thecoinbinatic ,with the-key-leversand piano-actions, ofa key-bed, a wind-chest be low said key-bed, primary valve-actions in said wind-chest,'opemlti g-pneumatics sup-. r 0

, ported outside of said wind-chest, a leader connecting said primary valve-actions with the operating-pneumatics, lifter-rods act-uatedby said pneu-maties, and intermediate lifter-pins guided on the rear end of said keybed in line 'tvith said lifter-rods, substantially as set forth. 2. The combination,wit h thekey-levers and piano-actions operated by said key-levers,'of

a key-bed for said key-levers, having guideways, a slide-frame guided lin said' ways, a

tracker attached to saidslide-frame, a winding'mechanism. for moving the music-sheet over said tracker, a wind-chest supported on said slide-frame, primary valve-actions-in said wind. chest, flexible tubes connecting --the tracker-ductswith the inlet-channels of saidprimary, valve-actions,operating-pneumatics supported at the rear part'of the wind-chest, aleader connecting said primary valve-actionswith the 'operating-pneumatics, a series of lifter-rods operated by said pneumatics and guided on said slide-frame, and litter-pins guided on the key-bed, the slide-frame with its trackergwindchest, primary valve-actions,

pneumatics and lifter-rods being adapted to -be removed bpdily from below the key-bed an replaced therein so as to resume its .normal position, substantially as set forth,

,3, The combination, with a stationary'keybed provided with guideways; of a detachable f slide-frame su pported by said'ways, a tracker,

- said primary .valve actions and operatingpneuinatics,and lifter-rods operatedby said pneumatics, all said parts being mounted on; the slide-frame so as to permit the convenient a"'music shee t-winding mechanism, a windchest,-primary valve-actions in said windchest,operatin'g-pnenmatics,a leader between removal of the same for repairs'and reinserting of the'sa'me without interfering with the key-levers and piano-actions, substantiallyasset forth.

4. The combination, vvith the key levers and piano-actions, ofia key-bed for said levers,

- v, provided with guideways,a slide-frame'gnided in said ,ways, a wind-chest attached to said chest, a leader connecting the primary valve,

slide-frame, a" tracker attached to said slide frame in -front of said Wind-chest, primary valve-actionslocated in said wind-chest, flexibletubes for connecting the tracker-ducts with the inlet-channels in said primary valveactions, said tubes being located in a fences or depression of the slide-frame; operating pneumatics supported at the rear of the wind actions with said operating-pneumatics, lifting devices for transmitting motion to said key-levers from said operating-pneumatics,

a perforated music-sheet passing over the tracker, and an exhaust-bellows connected with said wind-chest, substantially-as set forth.

5. The combination, with the piano-actions and'the key-levers foroperating the same, of

slide-frame guided below the key-bed for the key-levers, a tracker attached to the nnder side of the slideeframe, pneumatic-actions Toperatedbysaid tracker, also supported on "said slide-frame, and a music-sheet carrier,

tween the music-sheet spool and the windingup roll, a spring-catch for locking said carrier-frame,,a pivoted latch for said carrier- -frame, means for releasing said spring-catch so that the carrier-frame dropson the latch, means for actuating said latch so as to perm'it the dropping of the carrierframe with the winding-up roll, means for rotating the windrier-fra'me, and means for rotating the music- 'sheet spool after thetcarrier-frame is dropped,

so.as to rewind the music-sheet on its spool, substantially'as set forth. 7. The combination; with, the slide't'rame' supported below the key-bed, of a tracker in front of said tracker, a hinged carrierframe having .its hinge-joint between the ing-up roll before its'dropping with th'e'caron the same,a music-sheet spool supported music-sheet spool and the winding-up roll, a v

winding-up. roll supported on saidcarrier. frame back of .saidtracker, means for -lockin g said carrier-frame in normalposition, and means for rotating the'winding-up roll so as to move the music-sheet over the tracker, sub

stantially asset forth.

8. The-combination, with cated below the key-bed, of a tracker on said slide-tr'am'e, a rnusic sheetspool supported in front of said tracker, a hingedcarrier-frame, a winding up roll supported on the same backof said tracker, means for rotating the win ing up roll so as tomove the music-sheet over the trackena spri-ng-catchfor locking the carrier-frame, a latch for .saidcarrier frame, means for-releasi'ng'saitl spring-catch so as to drop the carrier-frame on the latch, and interrupt the Winding-up motion of the sheet, and means for releasing the latchand producing the dropping of the carrier-frame with the winding-uproll into inclined position, substantially as set forth.-

9. The combination, with a slide-frame 10- cated belowthekey-bed of,the piano, of a a, Slide-frame lotracker on said slide-frame,,amusic-spool I supported in front of said tracker, a hinged carrier-frame, a winding-up roll supported on.

said frame back of the tracker, mechanism for impartingrotary motion to said windihg-' up roll, means for pneumaticall; releasing said carrier-frame and interrupting the metion of the winding-11p r011, means for drop- 1 my invention Ibave signed my name in presping the earrier-frame-and winding-up roll ence of two SUbSCI'ibiDgWitHGSSGS. into inclined osibion, and means for ro'tating the, mnsic sheet spool after the carrier- V JOSEP H WIESER I 5 frame is-dropped so as to rewind the music- A Witnessesr sheet on. the spool, substantially as set forth. PAUL GOEPEL,

)In testimony that I cla i r-nthe foregoing as GEO. W. JAEKEL.

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