US983422A - Automatic piano-playing mechanism. - Google Patents

Description

G.P.BHAND. AUTOMATIC PIANO PLAYING MBGHANISM. AlPLIOATION FILED 33.10, 1906.

983,422. I Patented Feb. 7,1911.

4 BHEETSBHEET l.

4 SHEETS$HEBT 2. 1

" Eli, I

1 1 .1 fi xmsms. 1 1 I 1 1 1 Xxwmim:

G; P. BRAND.-

AUTOMATIG PIANO PLAYING MECHANISM. APPLIOATIQN PILLBDTEB. 10, 1906.

983,422. Patented Feb. 7, 1911.

4 SHEETSr-SHEBT 3.

G. P. BRAND.'

AUTOMATIC PIANO PLAYINGIMIBUHANISMH APPLIOATION rI-Lm) FEB. 10, 1906.

Patented Feb. 7, 1911.

4 MEETS-$2331 4.

to which the power is applied, so that the latter will be augmented by the leverage to impart. a short, quick powerful movement to the wippen C, when the actuating pneumatic l) is deflated, thereby having the advantage. of cutting down the size of the neumatics to go in a smaller space without any loss of.

power, thus insuring a practically lnstantaneous. blow and retraction of the. hammer. Not the least important. function'of the mul tip'lying lever E, however, consists in the' means which it affords for effecting the accurate and delicate adjustment of the role! tion and connection between the piano action A as a whole, and its actuating'pneumatic I), so as to obviate all looseness, lost mot on .or play, andeliminate, or reduce to the minimuin, all sliding, frictional contact of parts,

thereby avoiding unnecessary. wear and tear.

The contaet e, may obviously be made adj ustable by the use of.various'mechanical expedients. rigidly attached to the end of an adjusting screw e passing through the free end of the I multiplying lever E, so that by turning said screw 0 more or less, in one direct-ion or the other, the position of the wippen G, and connections may be regulated with accuracy with relation to the point of, support afford ed by the head 0?, of the. thrust rod 03, or: the actuating pneumatic D. In efi'ecting this relativeadjustm'ent of th parts, 'I prefer to use a taut bridle strap 0 as shown in Fig.

1, to insure the instantaneous return of the hammer shank b to the hammer rail H, after the full or normal stroke of the hammer;

Each actuating pneumatic rod d, passes through a guide rail G; which except when the pneumatic D is deflated, supports the head pl, and hence also-the multiplying lever E wippen C and connections-when the'action 4 d, d which engage with. the-armor extenis at rest. Each pneumatic D-is provided with an. internal stop or punching d,'-for limitingits extent of deflation. The lower endfof each pneumatic "thrust -rodtd,.= is" threaded and carries two, adjusting nuts sion d, on the movable member (Z o-f each actuating pneumatic D. Thus the extent to which the latter maybe inflated'whenthe.

'parts'.are in ,theirnormal positions as shown in Fig. 1, i'sset primarily by thenutsd 03*.

It is obvious that if under these conditions,

the guide rail G, be raised slightly the 'extent to which each actuating pneumatic 1),

may be inflated will be decreased to the extent Ito which the said guide ra'il G is raised, thereby ,shortQnirig the thrust of the pneu-. matic rod 'cZ,' and'at thesame time causing the multiplying lever E to -raiset'he wip penC and connections, so as to vfollow the hammer butt as the hammer-is raisedbythe rail H,

to bring the hammer nea'rer', and thisis aco pli h d, wi 1 rippin l e requirements of. pianissimo playing. The

In the, drawings, it is shown as At the same time the spoon a, rocks the damper lever .F, and removes the damper from the string, as illustratedin Fig. 2, in which position theaetion is adapted'to the guide rail G is thus raised from the primary position shown in .Fig. l, to the secondary position shown in Fig. 2, by means of one" or more (preferably two) neumatics I ofsuitable size, connec tedeither directly Snot shown) or indirectly Withsaid guide rai G.

secondary position shown in Fig. 2.

The hammer rail H may-be moved inde pendently by'pneumatic means, if preferred, syi'ichronously with the movement of the. the guide rail. That is to say, the stroke of the hammers may be restricted by the use of 1 pneumaticmeans for moving the hammer. railH in conjunction with. pneumatic means for moving the guide rail G provided both rails are moved sin1utaneously, 'whether-each is moved by -independent-means, as: in the modification illustrated in Fig. 5 orw'hether both are coupled together and moved in, uni

so'n the same'pneumatic means as'shown in the other figures of the accompanying drawings. In the lattery the han'imer rail H Y is supported upon one or more arms 71.,

(preferably by'such an arm at either .eXa tr'emit-y of the rail H.) pivotally'secured. to a stationary part-or parts h, and is coupled toguide rail G, by one or'more'connecting rods g, the alinement of the gu'ide-rail'Gg'.

' being maintained by one or more guide .rods

9, 'rigidly'secured to said guide rail G and sliding in a suitable rigid bearing .or'bearin'gs 9 The hammer. rail H connected by. means 301'" the pitma ni'z', with'the extension or arm 6; upon the movable member 5 of'the f pneumatic I, and this pneumatic and connection for the support and n'iovement the' hammer rail H may obviously be'duphcated,

I so that I-confine myself therein simply to the description of one such pneumatic and con-f The pneumatic I, is collapsed ligamentresistance of an internal SPIlIlgflF, which also assists-in expanding. the pneumatic when communication with the tension chamber is 'closed- #:iflis apunching or stop which limits the inward Idefiation,-- thus gaging the upward thrust ditthepjitman p fThe ilowerendiofthe'pitman','1s threaded to receive the 1', i, "for -eng'ga-gement' with the -armor e-ii'terisi'ont of the movable T phragm is restricted to afiord a tion of the actuatln the jacks (r, in touch with the hammer butts the port 77,- of the pneumatic ri-ctlv into the valve chamber 7',

member if. of pneumatic I. By thismeans provision is made for regulating .and a'd-' justing the normal position of the movable nici'nber i with relation to the punching i so as to increase or diminish the thrust ofthe pitniau i. and consequently movement of the hammer rail H. with relation to the strings. i

The valve chest work for operating the pneumatic I. and the actuating Pneumatics i), may he of any known or desired construction. .l'. have'hcrein by way of illustration only.

claimed in my concurrent application No. 246.86% filed Febyi 23, .905. although 1 do not restrictmyself thereto. \ihen this combination of parts is used,

in which is situated the valve 7.:, mounted upon the rod in, which is supported in guides 7'', 7' The valve chamber has two seats, one j opening to the atmosphere, the other 3', opening into the tension chamber J. The position of the. valve 7., controlled by the diasituated in the secondary dia phragm chamber j, which communicates through the port f, and passage 1, with the primary chamber 1, in which is situated the diaphragm. Z controlling the action'of the valve Z, upon the ing normally upon end of the passage}, so as to exclude the atmosphere from the passage 5F, and Z, and from diaphragm cl'iambers j, and 1'. When air is admitted to the phragm I? is lifted from its seat Z'hso that atmospheric pressure, acting upon the diaphrz'igi'n will transfer the valve putting theinterior of the pneumatic l, in communication withthe tension chamber J. and causing the deflation or collapse of said pneumatic l. against the res' :tance of its internal spring i As a result, the arm or extension 1', of the movable member 91 of the, pneumatic l, raises the pitman '5 thereby rockiiig the hammer pivotal support, and sin'iultaneously raising the guide rail G through the medium of the connecting rod g, the parts assuming and maintaining the relative positions illustrated in Fig. 2, in which the stroke of the hammers soft pedal effect,

aclion the partial deflao pneumatic-s D caused by the raising of thi; guide rail G, kceping or to quicken the and maintaining essentially the same relation of parts as that whlch exists 1n the'norinal position, so that upon out loss of time or motion, and the recovery the extent of,

hown the use of chest work like unto- .l'hat described and 1, opens diofa button valve on,

rod Z, said .valve 1, restthe seat 1 at the upperunderside of the dia-' through the duct Z, the valve Z",

Z, to the scat ji, thereby rail upward upon its further defiation each actuating pneumatic 1), effects the stroke'of the hammer Tnstantaneously, with- 7 between blows may. be reduced to the minnnum a conslde M1011 of practical importance in automat-ic piano players, ac-

intervals tuated by a perforated 'music sheet and tracker bar. 'By providing for the shorten ing of the stroke of. the

actuating or hammer pneumatics l am also enabled to attain a: quicker repetition of the action with a softer blow of the hammer against the str1ngs,-dehcacy ofaction combined with qulck repetition being a desirable feature: in

automatic players, and one not heretofore satisfactorily attainedfl Air may be admitt Z.'to the underside of the pr mary diaphragm F, to effect the deflation of the pneumatic I, to'restrict the stroke of the hamn'iers as he'reinbefore' set forth, either by means shown in Fig. 3, and which may be depressed manually, or by perforations in,

the valvem, is held open longas the pianissimo or prestissimo effect is desired, the release of the valve m, mospheric pressure from the underside of the primary diaphragnn so that the parts return to their normal positions, itlbeing understood that theusual bleed holes are formed in. the diaphragms. In the other case in which the restriction'of the stroke of thehammers isefi'ected by perforations in the music sheet a, I prefer to 1nterpose between the tracker barU, and the duct 6 of the primary. diaphragm chamber Z, the controlling mechanism set cation No. 296,313 filed January 16th 1906.; and shown in this connection in Figs. 1 and 2, for thepurpose of maintaining the pianissiino or prestissimo effect for a definite period prescribed by the distance on the ll'tllFllC sheet between the setting and releasiiig holes. Thus in Fig. 1, the perforations a, in the music sheet -n,'admit air through the hole 0, in the tracker bar 0, andthrough the duct 79, to the-underside of the diaphragnrp", thereby causing the rod 7)", to raise the controller lever g, in which position it is locked by the springilatchg. As a consequence the valve R is-raised, admitting air through the ductr, to the underside of the'primary diaphragm 1?, (Fig; 4) and thereby defiatingthe pneumatic I, and rewill be maintained until, as shown in Fig. 2,

admits air through the hole 0 in the tracker side of'the diaphragm 8, thereby depressing -the latch 'q, through the medium ofthe rod which is returned by its spring 7?, to its norclose. The closing of the valve R', relieves shutting olihthe at- I forth in my concurrent applr stricting thestroke of the hammers here- I 'inbefore set forth, and this condition of affairs bar 0; andthrough the duct 8, to the upper 125 s", and releasing the controlling lever q,

mal position and allowing the valve R to d through the duct I the niusic sheet 1 ,-passing over the tracker bar. ()5. In the first case a second perforation n, in thc-;- 1nusic sheet a,

' bination -of a plurality of. piano actions,--

" described. Y

4. In an automatic piano playerthe com-I the primary dia 'ahragnr F, of atmospheric pressure, and the fluted and the parts returned tothe position shown in Fig. 1, as hereinbefore described.

I 5 The construction and arrangement is such that the parts are accessible for regulation and adjustment from the front of the player,

which is a'practical advantage in both the .manufacture c, on the multiplying levers E is of special 'i-mportance in that 'it provides for the accurate and delicate regulation and supportof each piano action as related to the thrust rod ofits actuating pneumatic, sons to avoid looseness or contact.

play and unnecessary frictional In this-connectlom. also. maybe noted the, importance of the adjustment ofthe movable members of the puenmatiics upon their thrust rods and with relation to piano actions, tor the purpose described 2. In an automatic piano player, the com bination of a pluralityot piano actions,-

pneumatics for actuating the same, aham-v actions, and automer rail common to all the maticmcans for simultaneously adjusting thehammer rail to the strings and the stroke of the 'pneumatics with relation to the tions, for the purpose describedj,

3. 'In-an automatic piano player, the compneumatics foraotuating'the same. a hammer rail common to all the actions, and pile-lunatic means tor automatically and simultaneouslyadjusting the hammer rail in position with relation to the strings and th e stroke of the actuating. pneumatics with re,- lation to the piano actions, tor the purpose v bination of a pneumatics for ni'er rail common'to all the actions, a guide :rail supporting the thrust rods of said no tuat-ing pneumatics. said thrust -'rods, and

' means for simultaneously raising and lot-cering the hammer rail and said guide rail, for the purpose described. fif'In an automaticpiano 6'5 binati'on of a plurality 0 plurality of piano actions,

layer, the compiano actions, i

pneunnitic I isagain in-,

and. the. subsequent use ofthe 10 apparatus, The adjustment of the contacts the requirements of the case.'

piano player, thecomin position with relation" actuating piano ac-1 actuating the same, a ham-.

ing said hammer rail and rods on said actuating -u'1th pneuma'tics for actuating the same, a ham iner rail common to all the actions, a guide rail supporting the thrust rods of SaidilCiZlF- ating neumatics, said thrust rods, and pneu- V matic'means for simultaneously raising and (lowering the hammer rail andsaid'guide I raihfor the purpose described.

6. 'In an automatic piano player, the combination o f the hammer rail, piano actions and pneumatlqstor actuating the same,

thrust rods on said actuating pneumatics for'ined' with heads adapted to rest upon a rod, and means for guide rod, said guide v andlowering said simultaneously raising hammer rail and saidgu'ide rail, for the purv pose described.

7 Inan. automatic piano player,- the coniguide rod, said guide rod, and pneumatic means for. simultaneously raising and lower said guide rail, for the purpose described.

8. In an automatic piano player, .thecombination, of the actuating the same, thrust rods on said actuating I pneumatics formed 'with heads adapted to rest upon a guide rail, said guide rail, means for raising and lowering the said guide, rail, a hammerrail and means for" simultaneously varying the position of the the strings, for 'thejpurposedescribed. 5 f

hammer rail with relation to 9. [In an automatic piano player,: the coinbination of thepiano actionsan'd pneumatics for actuating thesame, thrust rods 0n'-said actuating pneui'natics formed with beads adapted to rest upon. a gulderail, said gu de rail, pneumatic means for raising and loweringthe said guide rail, a hammer rail andpneumatic-means for s multaneously vary-- ing the postion of the hammer rail with relation to the strings, for .t'hepurpose described.-

"10. In an automatic piano player, the combination of the piano actions and pneu- -mat1c's for actuating-the same, a guide rail,

a *pivotally supported hammer rail, thrust *heads'adapted to rest upon a guide rail, sald guide'rail, means for supporting said guide rail upon and suspendingit fronr said hammer rail, and means connected with said pivotally supported hammer rail and arranged to-.va-ry the position of the latter with relation to the strings and to simultaneously change the positionot the said guide rail, for the purpose'described.

11. In an automatic piano player, the combination of the piano actions" and pneumatic-s for actuating the same, thrust rods on said'actuating pneumatics formed with heads adapted to restupon a guide rail said; rail, means for supporting said um raii pianoactions and pneumatics pneumatics formed bination of the hammer rail, piano actions, and ,pneumatics for actuating the same, thrust rods on said actuating neumatics .formed with heads'adapted. to rest upon a ice upon and suspending it from a pivotally supported hammer rail,'said hammer-rail, and

deflation of said pneumatic,

pneumatic means connected vith said pivotally supported hammer rail and arranged to vary'theposition of the latter With relation to the strings and to simultaneously change the position of the said gu1de rail,

for the purpose described.

12. In an automatic piano player, the combination of a piano actidn and pneumatic for actuating the same by means of a thrust rod, said thrust rod, a punching or stop arranged Within the pneumatic to limit the extent of and "adjustable means upon the thrust "rod of'the pneumatic for regulating the extent to Which said pneumatic may be inflated, forthe purpose. described.

13. In a pneumatic piano player, the co1n'- bination of piano player action andpneu: matic tor actuating the same by means of a thrust rod, said thrust rod, a head or lateral shoulder on said thrust rod for engagement with a guide rail, and adjustable means upon said thrustrod for regulating the extent of movement of the movable member of the. pneumatic when the shoulder or headon the thrust rod is in engagement with the guide rail together with said guide rail, for the .tion of a piano action purpose described.

14. In a pneumatic piano player, the combination of a piano action and pneumatic for actuating the same by means of a thrust rod, said thrust rod, ahead or lateral shoul der on said-thrust rod for engagement with a guide rail, said i. guide rail, pneumatic.

means for raising and lowering the guide rail, and adjustable meansupon said thrust rod for regulating the extent of movement of the pneumatic.

of the movable member when the shoulder or head of the thrust rod is in engagement with the guide rail, for the purpose described. l i

15. In a pneumatic player, the combination of a plurality of piano actions and pneumatics for actuating the same by means of thrust rods, said thrust rods, lateral pro jections on said thrust rods for engagement with said guide rail, said guide rail, means. for raising and lowering said guide rail, and means for. varying and regulating the extent of motion of said guide rail, for the purpose described.

16. In an automatic piano, the COIIlbiDiP.

tion (at a piano action and a pneumatic for actuating the same, a thrust rod connected with the pneumatic, a pivoted lever interposed between the'thrust rod and the \vipp'en 'of said action, and a link pivoted at its ends to said lever and wippen and positively connecting said parts together, a guide rail, connections between the same, and the pneuinatics, a hammer rail, and connections whereby both rails are; simultaneously moved.

pen of said action, a link 17. In an automatic piano, the combination of a piano .action'and a pneumatictor actuating the same, a thrust rod connected With-the pneumatic, a pivoted lever interposed between the thrust rod and the vvipf pen of said action, a link pivoted at its ends to said lever and Wippen and pos1t1vely c011 nectmg said parts together, and an adjustable contact on said lever for engagement with stud thrust rod, a guide rail, connections between the same and the pneumatics,

a hammer rail, and connections whereby both rails. are simultaneously moved.

18. In an automatic piano, the combination of a'piano action and a pneumatic for actuating the:sa1ne,a thrust rod connected with the pneumatic, a pivoted lever interposed between the thrust rod and the wip pivoted at its ends to said lever and Wippen and positively connecting said-parts together, and an adjustable contacton said lever for engagement with said thrust rod, said link being disposed between thefulcrum of the lever and the thrust." rod,- a guide rail, connections be tween the same and theneumatics, a ham-' mer rail, and connections .ivhereby. both rails are simultaneously moved,

1 9. In an automatic piano, the combinaand a pneumatic for a thrust rod connected a pivoted lever interposed between-the thrustrod andthe wippen of said action, a link pivoted at its ends to said lever and Wippen and positively con necting said parts togetheig-and an adjustable contact on said lever for engagement with said thrust rod, a guide rail, connections between the same and the neumatics, a hammer rail, and connections whereby both rails are simultaneously moved.

20. In a pneumatic player, the'combinaactuating the same, with the pneumatic,

lion of a plurality of piano actions and actuating the same by means said thrust rods, lateral projections on said thrust rods for engagement "h a guide rail, said guide rail, pneumatic means for raising and lowering said guide rail, and-means for varying and regulating the extent of niotion of said guide rail, for the purpose described.

21. In a pneumatic player, tion of a plurality of piano actions and pneumatics "for actuating the same by means pneumatics for of thrust rods.

of thrustrods, said thrust rods, lateral proa JQCilUIlS on said thrust rods for engagement with a guide rail, said guide rail, a pneumatic and connections for raising and lowering said guide rail, a punching or stop arranged to limit the deflation of said p'neumatic, and means for regulating and adpisting the extent of inflation of said pneumatic, for the purpose described. 22.111 a pneumatic 'p-layer,; the combinationof a plurality of piano actions and the combinae pivotally supported and pneumatic, a punchin Pneumatics for actua projections ment with a gu t1ation thereof, and a punching or stop pneumatic action for I the jacks thefloiyer ends of the a hammer justing nuts and means for 'si pueumatics for actuatin of thrust rods, said thrust rods, a guide rail, rail, lateral projections on said thrust rods for engagement with rail, said guide rail suspended upon the hammer' rail,ja rod or pitmanconiiected with the hammer rail Wh connected with a or stop-arranged to said pneumatic and and adjusting the eX-' id pneumatic, for the limit the deflation ot means for. regulating .tent of inflation of sa purpose described.

' In a pneumatic playenthe combina tion of a plurality of piano actionsand ting the same by reat rods, said thrust rods, lateral on said thrust rods for engage.-

ide rail, saidguide rail sus-. pended upon the hammerrail, said hammer railpivotally supported and connected with a pneumatic by a rod or pitman, said pits man form'edwith athreaded portion, -adon said threadedportion for engaging. with the movable member of the -pneumatic and regulating the extent of in arpneuof said ranged to limit the deflation matic, for the purpose described.

Tlie'coin'binatiojn of a piano action, a, pneumaticaction,

and means for simultaneously shortening mers of the pneumatics.

'25. The combination of a piano action, a operatingthe same, for" simultaneously shortening v distance of the hammers-of the ano action and the. working movement-of e pneumaticsi 26. The combination pneumatic action for and means for simult the striking distance of the hammers of the piano action and the Working inovement'ofthe pneumatics and maintaining contact of and hammer piano action and their actuating and means the striking f-pi th of a piano actioina operating the same,

acti'on.-

'27, The combination of a piano action, a pneumatic action for operatingthe same,

the'striking. distance of piano action and the W the .pneumatics and ma thej jacks and hammer butts oft-he piano action and. of the said action and preventing h t met e 1 Y mechanical musical instrument havdevices, a movable striking vpneumatics by the pneumatics ain'd'a'c'tuating the sound producing device,

the hammers of the orkmg movement of inta-ining contact of nectedw'itli the fingersofthe pneumatics,

"said striking neumatics having interior ereby the latter is the stroke" of the hamaneously shortening butts ofthe pianog the same by means I cushions 'tion of said or buffers for "limiting the exhausrail or guide, and mechanical means for said guide 29(A manually pneumatics and abst a'movable guide rail playingmechanism I said multaneously shortening abstracts being corn striking pneumatics and j for simultaneously partiallfy hammer rest, of striker ,pn'eu' moving theabstract rail rail simultaneously.

or mechanically operated ction including ippens,

and the movable piano having an a and a movable 11 action for operating the piano action said pneumatic action containing avmovable; ab

stract rail, 01" guide, mechanical means for movingthe abstract rail and the hammer railsimultaneously, .forthc purpose specified.-'.'-

30'. A manually or I mechanicallyoperated piano having an acti on including Wippens and a movable hammer rail or rest, striking racts operated bythe pneu'matics and actuating the piano action, said abstracts having stops combined wit-h 31. A manually. or piano having an. action with Wippens, pneu matic strikers having fingers, and abstracts for; operating said ip'pens, the abstracts aving stops which rest upon a movable guide rail, the movable guider'aili' the lower ,endsof the abstracts being connected with the pneumatic fingers.

a. suitabl piano action, consisting'of pneumatics and means for actuating'the same, push rods for said pneuinatics actuat' gly-engaging piano action, a movable push rod rail to raise said push rods andmeans for mov-' ing said push I'Od'rai'l. In a piano, the combination withthe hammers, .of means collapsing all of the-striking pneumatics be ore they areopen rated to move the hammers to soften [the striking blows of the hammers. 34. In a piano player, the combination with hammers and accessories, an adjustable hammer rest' and means for hammer rest, of strikerepneum'atics, means for operating thehammers froi'nthestriker pneumatics, and meansf for adjust-i the striker pneumaticscorrespondingly wig] the hammer rest, substantially as set forth.

35. In a pl With hammershaminerrest In a piano,

and accessories, an adjustable and means for adjusting the for operating the hammers from the striker pneumatics, and means for reducing the neously With the adjustment of the, hammer rest, substantially as set forth.

In a. player-piano, the combinat on with hammers and accessories, an adjustable: hammer rest and "means for adjusting the hammer rest, of striker-pneumatics, means for o crating the hammers from the'striker pneliiiiatics,fland ,means for adjusting the adjusting the.

matics, means pneumatics, a movable abstract amm'er rail, a pneumatic mechanically. operated ayer piano, the combination stroke of the striker pneumatics. simultastrikerneumatics by the same means 'th zit serve for adjusting' the hammer rest, sub, stantially as set forth. 1

37. In a player piano; the combination with hammersand accessuries, an adjustable han'urier rest and means for operating the; hammer rest, of striker neumatics, means for eperating the hammers frem the striker puleumaties, and means for}reducing ,the'

stroke of the striker neumatics by thejsame' me ns that adjust the'hammerrestysuhstential y-as set-forth. 5

I 38. In "aj player pianb," theeombihetihn with! hammers -a nd accessories, and anhdju'stable hammer rest, of a rod for the-shift- .ing of the hammer rest, striker neumatics,

means for opera-ting the hammers from the j striker neumatics and meansbperated by said rod for adjusting the striker pneu- 4:, nmtics, substantially asset forth.

39. In a player piano, the combination withhzunmers and accessoriesnand an.-ad-

,a dj ustehl deviee'jfor lifting sid means, and 1 neehenis m forv operating said lifting device simultaneously with adjusting the hammer rest adj stin means, substantially as set justabie hammer rest, ofa rod fo'r adjustitig assets :5" i '7 the hammer rest, striker neumatics, operating lii81=9lt8llding from the striker pneuf e; hammer operating dBVlCBS', an

forth. n v In a plziyer piano, the combination with hammers and aeeesseries, and an adiustable hammer-res Qj a rod adjusting" theh'animermest, striker neumatics, rods extending frp m the striker pneumaties to the hammer eperating devices, an adjustable meansifox lifting said rods, through which said 'rods pass freelyand mechanism fer bp'erati'ng said lifting device sii'nultaneously with the hammer rest adjusting means, substantially assetfnrth.

GEORGE P. BRAND.

Witnesses:

Gee. WLAILMIATT, D. GARDNER.

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