US795881A - Musical or other instrument employing perforated sheets. - Google Patents

Description

PATENTED AUG. 1, 1905.

. 0. H. ARNO. MUSICAL 0R OTHER INSTRUMENTEMPLOYING PBRFORATED SHEETS.

APPLICATION FILED NOV.. 21,1903.

3 SHEETS-SHEET 1.

WH'NEEEES- 11611111 PATENTED AUG.Y1, 1905.

0. H. ANNO. MUSICAL 0N OTHER INSTRUMENT EMPLOYING PBRPORATED SHEETS.

APPLICATION FILED NOV. 21.1903.

s SHEETS-SHEET `2.

fnl.

v/ITNEEEIEE- No. 795,381. PATRNTRU AUG. 1, 1905` o. H. ARNo. MUSICAL 0R oTHRR INSTRUMENT RMPLUYING PRRFQRATRD sRRRTs.

APPLICATION FILED HOV. 21. 1903.

HnlllllllllV/l//M .lllll 3 SHEETS-SHEET 3.

fig-E- UNITED STATES PATENT OFFICE.

OLIVER H. ARNO, OF BOSTON,- MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO ALEXANDER STEINERT, OF BOSTON, MASSACHUSETTS.

MUSICAL OR OTHER INSTRUMENT EMPLOYING PERFORATED SHEETS.

Specification of Letters Patent.

Patented Aug. 1, 1905.

. Application filed' November 21,1903. Serial N0- 182,150.

To all whom it may concern:

Be it known that I, OLIVER H. ARNO, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Musical or other Instruments Employing a Perforated Sheet, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The invention relates to the herein-described improvement in musical or other instruments employing a perforated sheet in connection with a tracker-board and pneumatic system, all combining for the actuation of said instruments; and it relates with more specific reference to a means or instrumentality for governing the movement of such sheet that upon its lateral displacement it may be restored to and so be maintained at a true normal center of position relatively to the tracker-board, when said sheet will track right with respect to said tracker-board.

Inasmuch as the instrument or device comprising my invention is especially adapted to its passage being laterally retained by the fianges of the respective spools. 'Owing to theinaccuracies naturally resulting from such mode of lateral retention, the sheet is very likely to become laterally displaced from its normal true center of position relatively to the tracker-board when its perforations will not track with the wind channels or ways in said tracker-board, and the instrument accordingly fails to operate properly, and this is especially true by reason of the fact that the paper comprising the perforated sheet is eX- tremely sensitive to atmospheric conditions, either swelling' or contracting from its normal proportions, when it will either wear against the flanges of the rolls or spools and be displaced thereby, when the paper is swollen, or

upon a contraction of the paper the spoolflanges will become practically inoperative in laterally controlling the paperthat is, in so far as its proper tracking is concerned relatively to the channels in the tracker-board.

In View of such considerations it is within the purpose of my invention to provide the perforated sheet with such auxiliary means of control that it will be maintained to run straight and true relatively to the trackerboard, any tendency to displacement thereof, however occasioned, being accompanied by a counter effect which restores the sheet to its normal true position. Such means with general reference consists in providing the sheet throughoutits lengthwitha lineof perforations which when the sheet is tracking right relatively to the tracker-board are destined to pass between separate adjacent chambers or windpassages of those formed therein; but immediately upon the sheet becoming laterally displaced the line of perforations at some point will pass over one or the other of these channels, depending as its displacement is to the one side or the other, with the effect that the y one or the other of separate sets of means are thereby pneumatically actuated to move the rolls or spools around which the sheet is passing in a direction counter to the direction of its displacement, which movement of the spools or rolls has of course the eect of restoring the sheet toward its normal true position, and such counter movement of the rolls or spools is continued until the line of perforations in the sheet` again track between the adjacent holes or wind-passages in the tracker-board, when further lateral movement of the rolls or spools immediately ceases, and the paper proceeds in its running until its further displacement requires a repetition of such counteracting operation.

My invention in its physical embodiment, together with its various incidents of construction which make the device more perfect, can best be seen and understood by referenceA to the drawings, wherein-l Figure 1 shows in front elevation a portion of a piano-player fitted with my improved device for governing the perforated sheet thereof, the device showing mainly in longitudinal vertical section. Fig. 2 shows the same in plan. Fig. 3 shows in' end elevation will hereinafter be made.

enlarged detail of a portion of the structure shown in Fig. 2 to which reference will here- 7 ina'fter be made. Fig. 5 shows in lu'n'izontal cross-section the pneumatic system, to which reference will hereinafter be made. l `igs. G and T show enlarged details of portions of the structure shown in Fig. 2, to which reference will hereinafter be made. F'g. 8 shows in vertical cross-sectioll a detail of construction, to which reference will also hereinafter be made.

vIn the drawings, A represents a box which for the purposes of illustral.ion may bedesignated the music-box," so called, of a pianoplaying instrument.

A' rejn'esents the paper-roll, and A the takeup roll, 'from the one to the other of which runs the perforated or music sheet A over the end ofthe tracker-board A". The respective rolls A A, instead of being mounted Vin the usual manner in bearings relatively lixed to the sides of the music-box, are mounted in bearings laterally movable, wherefore the spools or rolls moving together likewise have a certain deg'ree or amount of lateral play. Such movement is obtained by lixing the respective bearings through a series ol connecting-arms to a coilnecting piece or plate extending crosswise the back of the music-box, and which plate, supported by suitable side pieces or hangers hinged to the sides of the music-box, is capable of a certain degree or amount of lateral play.

The bearings 'for the music-roll are designated B l and for the take-up roll B2 B". These respective bearings do not difler in their construction from those now in use, and their construction is so well known in the art that for the sate of expediency general reference is thus made to them.

l5" represents the connecting piece or plate to which the respective bearings are joined. The plate B" is of a relatively thin structure and has any suitable configuration. It sits in close to the back of the music-box, across which it extends, and its ends extend slightly beyond the same at either side. `lt also may have to advantage one or more reinforcingstrips This plate B supported to have lateral movement by being pivoted to the swinging sides or hangers B" l, Vlt is to be noted that the respective ends of the plate, which extend, as just stated, beyond the sides of the music-box, are provided at the top and bottom with sets of inturned lugs lf o, carrying pins o bil/1" between which pins serving as a pivotal connection are hung the respective swinging sides or hangers /f 1;, which are hinged to the sides of the musicbox near the front by being Illing between sets of pins /f set in lugs /f 7 s bs, lixed to the respective sides of the music-box, and it isalso to be noted that these pins supporting the swinging sides or hangers are preferably adjustably combined with the respective lugs in which they are contained in order that there may be a certain adjustment of the meinbers in respect to their relative positions. Such adjustment may be obtained bythe simple mecl'ranical expedient of having the pins set into holes in said lugs and held therein by a set-screw, which screw for all the pins may be designated lt is also to be noted that the bearings B and B forthe roll A pass through the swinging sides or l'iangers BZ .15", (see Fig. 1,) the Vformation of the sides permitting el this passage. lnasmuch as the bearings B"I l of the take-up roll Af coule below these swingingl sides, no provision need be made. There is no interference.

As said above, the ends of the movable piece or plate l'l1 project slightly beyond the line of the sides otsaid music-lam, and tl'lese projecting ends of the plate are preferably further extended by portions /;)//1',\vllich portions are provided, respectively, with the vertically-externling' ribs /"i 6', to which are secured the arms which combine the respective bearings of therolls with said plate and to which rib especially on the one side, are secured other attachments, as will hereinafter be explained. Referring, therefore, to these connections on the one side, the bearing B is joined to the rib b of the movable back piece or plate by a connecting-arm l1, (see Fig. 2,) while the bearing is joined to said rib by the arm N. (See Fig. l.) )n the other side the bearing B is joined to the rib /lof the plate B| by the arms /"l/J", (see Figs. 2 and 4,) a wide support being provided by these arms in order that a certain rewinding mechanism which ordinarily connects with such bearing may here be provided, and the bearing B" is secu red to said rib /wby the arm 0", this arm practically being extended to form the said bearing or support therefor. Upon the lower extended end of said rib J there is borne crosswise a hanger tu', carrying in its turned end pins ff" b21, respmztively, (see Fig. 7,) between which pins is hinged the structure comprising the arms (fn/1", which carry the winding n leclianism X", having on.

its end the pinion lf", engaging' with thegezn' 0, situated upon the take-u p roll in the usual manner. lhere is also provided in connection with this winding mechanism the usual means by which the same turning at the point of its hinged connection, as before men? stated` the rolls or spools are thus supported to have lateral play in order that they may be moved in one direction or the other te correct any displzitcement of the perforated sheet passing' between them, the rolls or spoolsE pneumatically governed, and this primarily,

through a line of perforations C, extending longitudinally the length of the perforated i sheet and preferably cut along or near its center. These perforations when the paper is tracking right or running normally true with respect to the ways or channels in the tracker-board are destined to pass, so as not to uncover certain ways or channels C U2 therein; but immediately upon the sheet becoming laterally displaced the line of perforations in said sheet will uncover the one or the other of these holes, depending as the displacement of the sheet is to the one side or to the other, with the effect that certain primary impulses are set in operation which through certain interniediate pneumatic instrumentalities have the effectof moving-a lever D in one direction or the other. The lever is pivoted at the point Z to a structure D', preferably containing these pneumatic instrumentalitie's, and is connected by a suitable arm d with the E.sw-inging structure bearing the rolls, wherefore the movement of said lever is imparted thereto to laterally move said rolls in one direction or the other, and so restore the sheet to its proper position relatively to the trackerboard, and it is to be noted that in order for this effect to be obtained the lever must be operated by the pneumatic instrumentalities to have such movement that the rolls affected thereby will move in directions reverse to the direction of the displacement of the perforated sheet, and which movement shall immediately cease upon the shcets being restored to a correct tracking position. 1t is also to be noted that the arm d preferably makes an adjustable connection with the end of the lever D and at its other end connects with the swinging support for the rolls by connection with the arm L of such structure.

Referring now moreI specifically to the pneumatic instrumentality or means of pneumatic influence, which operated upon by onel primary wind impulse or another,dependent upon the direction of displacement of the perforated sheet, moves the lever D to. help effect the restoration of such sheet, and referring to Figs. l, 2, and 5, where the construction can best be seen, E E' designate pneumatics fixed to the pneumatic structure D upon either side of the lever D, the movable sides of which pneumatics facing said lever are joined by a link e, which by engagement with said lever moves it in one direction or the other, dependent as the one pneumatic or the other is l collapsed.

of lateral position by the pneumatic E2, which pneumatic has upon the top of its movable side a shoe e', which engages with the bottom The lever D is held at any point end of said lever so holding the same in position, the shoe being normally made to engage with the lever by means of the tension-spring e2, with which said pneumatic is provided. Of course upon the contraction of this pneumatic E2 the shoe e', carried thereby, will be withdrawn from the lever D, when the lever is free to move in the direction governed by the pneumatic E or E. The pneumatics E, E', and Ez'are collapsed or controlled by an exhaust obtained from any suitable source of exhaustion, the pneumatics E and E' being exhausted separately, whereby the lever D becomes moved in the direction of one or the other; but either pneumatic is collapsed simultaneously with the pneumatic E2, this in order that the lever D may be freed from the normal engagement of the shoe c', when it may be moved in the direction ofthe controlling-pneumatic, and, moreover, it is so arranged that the exhaust is controlled to operate or collapse the sets of pneumatics E and E2 or E and E2, dependent upon tne direction of the displacement of the perforated sheet, and this by the line of perforations C therein at some point within their line uncovering one or the other of said channels O/ or C2 in the tracker-board, depending as the sheet is displaced to the right or left when the air in the music-box is permitted to enter said channels normally exhausted of air by connection with the exhaust,

and the impulse resulting therefrom operates certain valvular connections which open a passage for the exhaust to either one or the other of said sets of pneumatics, with the effect that the lever D being released is moved in the direction of its controlling-pneumatic and the rolls laterally controlled thereby and tends to restore the sheet to its normal true position. For these purposes, referring first to the chambers and passages of the exhaust, the pneumatic structure is provided with the respective exhaust-chambers F and F, joined by the pipe F2 and all in communication with any suitable source of exhaust, as through the pipe or connection F3. Thbse respective chambers, through by-passages f and f and the pipes f2 and f3, communicate with the respective ways or channels C and (12in the trackerboard, whence said ways and channels and the connections leading' therefrom will be normally exhausted of air. Above these respective chambers, through ports fifr, are chambers or passages]L16 andf?, respectively, which lead to the respective vertical passages f and f, which in turn extending upward lead, repectively, through passagesfw and f (which passages are controlled as will hereinafter be explained) to the pneumatics E and E, and extending downward the said channels lead to the channels f12 and fm, extending horizontally and connecting by the passagef and f15 with a common exhaust chamber or passage f1, controlled by the respective hinged valves f and f, The common chamber or passage f1 leads horizontally through a channel fm, thence vertically by a passageff to connect with the pneumatic The portsfLl and which connect the exhaust-chambers F and li" with the respective chambers f and f7, are controlled b y the respective valvesfi" and fi, said valves being normally kept closed by the suction of the exhaust, w herefore the exhaust is normally kept shut oil from the respective sets of pneumatics E and Ele and E and E2 correspond ing with said cham bers. These valves lfnand fi, controlling the portsf'L and f" are o )ened however whereby the exhaust 7 7 5 spective pipes f and f, which at one end.

connect with the respective channels of the trackenboard, connect at the other ends directly with the exhaust-chambers F and F by passages ff and f. These passages are closed by diaphragnis fuif, on which rest or to which arev attachei'l the valvular stems or connections finf, joined to the respective valvesff and fig, with the effect that when the wind impulse comes down from the one or the other channel in the t'.1'acker-board, accoi-ding to the direction of displacement of the perforated sheet` the air will press upon and raise the diaphragms f2 01 ,/"fl corresponding therewith, which diaphragms through the intermediate connections will raise, and so open, the corresponding valvesjfi21 orf when the exhaust has free passage to the one or the other of the sets of pneumatics, as before explained. Upon the replacement of the perforated sheet the channel in the tracker-board previously uncovered will again become closed and exhausted of wind by an ordii'iary bleeder in the dizuihragm, when the air-pressure upon the respective dizuiihragms will be released and the valves fil br ft" closed, as aforesaid, by the suction of the exhaust and the diaphragms, through the stem connections, pressed down in placement Vfor Vfurther operation. llt is also to be noted that the valvesfil1 and f* carry stems fi and f3, upon which are arranged valves fm and f3, controlling' portsf fi, opening through the walls of the respective chambers or passages f" and f7 to the air. Y rlhese valves just mentioned move simultaneously with the valves fil f, becoming closed when said valves are opened, whereby there will be a closed passage for the exhaust to the pneumatics, or becoming opened when said other set of valves becomes closed, whereby the exhaust then sluit olf :from the pneumatics they maybethereupon filled with air and prepared for any further operation.

lt is perhaps unnecessary to refer with detailed description to the operation of my device, inasmuch as the functional relatioi'iship of its various parts has already been so specilically explained. The respective rolls are so hung or supported that they will have a certain amount or degree of lateral play in either direction from a normal center ol' position and so the perforated sheet carried by said rolls be correspondingly moved relatively to the tracker-board and, as said before, apart 'from this consideration, the respective rolls, their bearings,and,in a musical instrument,the various winding, rewinding, and other attach ments are of the usual construction and mode of operation. ',lhe rolls in the lirst instance are adjusted tovsuch lateral position that the perforated 'sheet will be in a normally correct position relatively to the tracker-board or so as to track right with respect to the channels thcreo'f. lVhcn the sheet is in this position, its line of perforations C will run between without uncovering the channels or ways C b2 of the tracker-biliard. Now immediately upon the sheet becoming displaced `from its said normal center of position ruhe tively to the tracker-board, as it may in the running or for reasons before mentioned, one or the other of the said channels in the trackerboard will become uncovered by some portion of the line of perforations. Assuming, for the sake of illustration, that the sheet is displaced to the right, so that the channel T" becomes uncovered, at such moment the air in the music-box will pass into said channel normally in connection with the exhaust, as before explained, andthe wind impulse so ohtained passing through the connecting pipes or channels will raise the diaphragm ff and through the medium of the connecting-stoms open the valve fi and close the valve fi", when a clear passage will be obtained for the exhaust in the chamber F to operate through the port f, the chamber or passage f7, thence through the channel or passage j, upward upon the pneumatic .lC/ and downward through the passages fmf'l'r, and through the chamber fl, (the valvej"s leailing to this chainber being drawn open by the exhaust while the complementary valve f" is drawn closed by the saine,) the exhaust then operating from the chamber fw' through the passages fm fu" upon the pneumatic E. `Both pneumatica are collapsed by the exhaust, the pneumatic E', through the connecting-link w, acting to operate the lever l), and the collapse of the pneumatic E permits of such operation by the release of the end of the lever from the retention of the friction-shoe ff'. ..lhc lever D thus operated acts, through the connectingarm o, secured to` the movable suppm't or frame for the rolls, to draw the same laterally in a direction contrary to the displacement of the sheet, and they in turn act to correct the displacement of the samerelatively to the tracker-board. The action of the exhaust continues as long the valve fi is held open or so long as the perforation in the sheet permits air to pass from the music-box to the controlling-diaphragm. Immediately upon the channel C2 becoming closed, however, or upon the sheet becoming restored to its normally correct position relatively to the tracker-board the line of perforations C in the perforated sheet will again run between the channels C and C2 of said tracker-board and the other perforations in the sheet will track right relatively to the other corresponding channels in said tracker-board, and the said channel C will again become exhausted of wind and the air shut off from the diaphragm, the valve f 22 will become closed, and the valve f32 opened, when the exhaust will be shut off from the pneumatics and air admitted thereto. The pneumatic E with the shutting of of the exhaust will then cease to operate the lever D, and with the pneumatic E2 restored the said lever will be held to the point to which it has been adjusted by the engagement of the friction-shoe e on the spring-pressed movable side of said pneumatic E2, which shoe 'acts as a stop to said lever.

It will be, perhaps, unneccessary to further describe the detail of operation of my device.

the channel C will become uncovered, result ing accordingly in a mere reverse Inode of operationwviz., in the actuation of the pneumatic E operating to move the lever D in a direction reverse to that previously mentioned and accordingly acting to restore the perforated sheet in adirection reverse'to the direction of its dis placement, the pneumatic E2, carrying the friction-shoe, serving as a stop for the lever, acts simultaneously with the pneumatic E just as with the pneumatic E', with the difference that the exhaust coming from the chamber F opens the swinging valvej117 at the entrance to the chamber f1, leading to said pneumatic, and draws closed the valve fw, a mode of operation just reverse to that previously described. In this connection the expedient of three pneumatics influenced by two primaries is especially to be noted, one pneumatic being susceptible to the iniuence of two separate primaries, the passagev to the pneumatic being controlled by valves which become alternately closed or opened, depending as the exhaust comes from one primary or the other.

In connection with the operation of the device attention is also called to the fact that lest the pneumatics E and E operate too rapidly each is accordingly controlled by a controller G, placed in the respective passages fm and f, (see Fig. 1,) leading to said respective pneumatics, by which the amount of the exhaust controlling the same may be determined, wherefore the pneumatics may be made to operate by a rapid or slow movement, as may be desired. The controller G (see Fig.

8) comprises a tube g, so placed as to completely fill and to so form a portion of the passage from the exhaust to the pneumatic and having an opening g in its side through which the exhaust may operate. The tube practically acts as a sleeve, and into this is fitted a tubular arm g2, which is closed at one end and open at the lother for the passage to the exhaust. This arm has cut through one side an opening g3, which when the tubular arm is turned to a certain position registers with an opening in the tube or sleeve, through which opening the exhaust may operate, but which arm when turned into another position may entirely close the openingin the tube or sleeve, shutting off the exhaust, or by partially turning the arm the opening in the tube or sleeve may be partially closed when the passage to the exhaust is commensurately limited. The closed end of the arm is preferably turned to form an operating-handle g4. The controller is most ecient for the purpose to which it is put, and it is obvious that it might be used for controlling a wind-passage as well as the passage for an exhaust.

Another point is also to be noted. Reference has already been made to the fact that the line of perforations C in the perforated sheet are preferably placed longitudinally along the middle of the sheet, and this is for a distinct purpose. Of course when the sheet swells or contracts such contraction or expansion will naturally be equal for both sides of the sheet, so that with the controlling-line of perforations in the sheet placed upon one side thereof the effect would be to correct a displacement of only that side, which would not tend to correct the displacement of the other side of the sheet, but rather to increase the same. By placing the line of perforations in the middle of the sheet, however, it will be held to a true normal center of position, and whatever contraction or expansion there may be will be made equal for both sides.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United Statesl. In a musical or other instrument of the character specified, a paper-roll, a take-up roll, a perforated sheet running between the rolls, said sheet having a line of perforations, wind-channels over the end of which said perforated sheet is adapted to run and between which the line of perforations therein is adaptto pass when said sheet is running normally true, but which line of perforations upon displacement of said sheet is adapted to uncover one or the other of said wind-channels, and means set in operation by the impulses so obtained acting to restore said sheet to a relatively true position.

2. In a musical or other instrument of the character specified, a paper-roll, a take-up roll, a channeled tracker-board and a perforated sheet running between said rolls over the end of the tracker-hoard, which sheet is provided with a line of per forations adapted when the sheet is trackingI right to run between two adjacent channels of the trackerboard, but upon displacement of said sheetis adapted fio uncover one or the other of said separate channels in the trackei'l oard dependent upon the direction of its displacement.

3. ln a musical or other instrun'ient of the character specified, a paper-roll, a take-up roll, a perfprated sheet runningl between the rolls` said sheet having'a line of perforations along the middle thereof, wind-channels over the ends of which said perforated sheet is adapted to run and between which the liueof porfin-ations therein is adapted to pass when said sheet is running` normally true, but which line of perforations upon displacementof said sheet is adapted to uncover one or the other of said whirl-channels, and means set in operation by the impulses so obtained acting' to restore said sheet to a relatively true position.

4. In a musical or other instruinent of the character specified, the combination of a paper-roll, a take-up roll, aehanneled trackerboard, a perforated sheet, said sheet hav ing a line of pex'loi':'u;i ns along' the middle thereof which when the sheet is tracking' right relatively to said tracker-lniard is adapted to pass between two adjacent channels formed therein normally exhausted of wind, but which perf'orations upon lateral displaeementof said sheet at any pointof its unwinding are adapted te uncover one or the other of said channels in the tracker-lioard, dependent upon the direction of its displacement, and means operated by the pneun'iatic impulse so obtained acting to restore said sheet to its correct position relatively to said tracker-board.

ln a musical or other instrument of the character specified` the ccnnbination with a channeled tracker-board and perforated sheet adapted when in normal position to track right with respect to the channels of the trackerbo:nd, of means operating to restore said sheet at the moment of and continuing during' the lateral disi'ilacement of said sheet from its norlnally correct position, as aforesaid, a stop, pneumatic'ally operated, acting' at the moment of the restoration of said sheet, and means for operating' said stop.

(i. In a musical or other instrument of the character specified, the combination of a paper-roll, a take-up roll, laterally-movable hangers orsupports for said rolls, a channeled tracker-board, a perforated sheet running* between said rolls, said sheet havingl a line of perforations which when the sheet is tracking' right is adapted to run between two adjacentchannels of the tracker-board, but upon displacement of said sheet is adapted to uncover one or the other of said separate channels, and means operated upon by the wind impulses so obtained to move the hangers or supports of said rolls in a direction reverse to the direction of displacement of said perforated sheet, whereby said sheet will he restored to a relatively correct position with respect to said tracker-board.

'7. ln a musical or other instrmnent of the character specified, the combination with a channeled tracker-board and perforated sheet adapted when in normal position to track right with respect to the channels of the trackerboar l, of a lever `for changing in 4either direction the relative lateral positions of said members, whereby said sheet will be rester-ral to track right with respect tothe channels of the tracker-board, upon a displacement of said sheet, pneulnatics controlled by wind impulses for operating said lever, and a step adapted to automatically engage with and hohl said lever in different operative positions.

In a musical er other instrument of the characterspecified,a paper-rolha take-up roll, suitable supports or bearings therefor, a latorally-swinging frame to which the bearings or supports for said rolls are joined, whereby they may be moved laterally in either d irectiou, a lever connected with said frame for moving the same laterally in either direction, a channeled tracker-boartka perforated sheet carried by said rolls adapted when in normally correct position to` track right with respect to said tracker-board, means for operating said lever, whereby said frame and rolls carryiimr the perforated sheet may move in a direction reverse to the direction of displacement ot' said sheet.

9. 1n a musical or other instrument of the character specified, the combination with a channeled tracker-board and perforated sheet adapted when in normal position to track right with respect to the channels of the trackerboard, of a level' operating to change in either lateral direction the respective positions of said sheet and tracker-board, so acting to restore the sheet upon displacement thereof, means for operating` said lever` and a stop `for said lever acting at the moment of the restoration of said sheet.

1f). ln a musicalor other instrument of the characterspecified, a paper-roll, a take-up roll and suitable supports or bearings therefor, a laterally-movahle Vframe to which the bearings of said rolls are joined whereby they are laterally movable, a channeled tracktnsliozwd, a joierforated sheet adapted when in normally correct position to track right with respect to the channels of said tracker-board, means for generating' wind impulses upon a lateral displacement of said sheet, a lever operating to move said frame in a direction reverse to the direction of displaeenient of said sheet, and a stop for said lever.

l1. `In a musical er other instrument of the character specified, the combination with a channeled tracker-board and perforated sheet adapted when in normal position to track right with respect to the channels of the tracker-board, of a lever for changing in either lateral direction the respective positions of said members, whereby said sheet will be restored to track right with respect to the channels of the tracker-board, upon a displacement of said sheet, a stop for said lever, and pneumatics operating to control said lever and stop dependent upon the position of the perforated sheet. r

19,. In a musical or other instrument of the character specified, a structurehavingin combination therewith a paper-roll, a take-up roll, their bearings and attachments, a laterallymovable piece or plate, arms for securingl the bearings and attachments of said respective rolls to said piece o`r plate, and swinging sides or hangers hinged or pivoted to the respective sides of said structure Vfor giving laterallymovable support Vfor said piece or plate, substantially as and for the purposes set forth.

13. In a musical or'other instrument of the character specified, a paper-roll, a take-up roll, a perforated sheet running between the rolls, said sheet having a line of perforations,

- wind-channels over the ends of which said perforated sheet is adapted to run and between which the line of perforations therein is ad apted to pass when said sheet is running normally true but which upon displacement of said sheet is adapted to uncover one or the other of said separate channels, dependent upon the direction of displacement, pneumatics actingI to effect the restoration of said y sheet, channels or passages for an exhaust opmeans operated upon for-controlling said valves.

14. In a musical or other instrument of the character specified, a paper-roll, a take-up roll, a perforated sheet ruiming between the rolls, said sheet having a line of perforations, wind-channels over the ends of which said perforated sheet is adapted to run and between which the line of perforations therein is adapted to pass when said sheet is running normally true, but which line of perforations upon displacement of said sheet is adapted to uncover one or the other of said wind-channels, a lever connected to effect the restoration of said sheet upon such lateral displacenient, pneumatics controlling said lever, channels or passages for an exhaust for operating said pneumatics, valves normally closing the exhaust from said pneumatics, means operated upon by the wind impulses obtainedby the uncovering of said channels for opening said valves at the moment of and during the displacement of the perforated sheet, and astop for retaining said lever upon the restoration of said perforated sheet.

15. In a musical or otherinstrument of the character specified, a paper-roll, a take-upV exhaust for control ling said pneumatics, valves normally closing the exhaust from said pneumatics, passages leading from the chambers or passages of the exhaust to connect with the aforesaid channels, diaphragms closing the entrance to said passages, means connecting said valves and diaphragme, and by-passages leading from said chambers or passages of the exhaust to said passages connecting with said channels.

16. In a musical or other instrument of the character specified, the combination with a channeled tracker-board and perforated sheet adapted when in normal position to track right with respect to the channels of the tracker-board, of a lever for effecting the restoration of said sheet upon a lateral displacement thereof, pneumatics E and E connected to control said lever, a pneumatic E2 acting as a stop therefor, chambers and passages for an exhaust operating said pneumatics, and means for individualizing said pneumatics into the set E and E or E and E2, to be operated upon separately by thc exhaust dependent upon the direction of displacement of the perforated sheet.

17. In a musical or other instrument of the character specified, the combination with a channeled tracker-board and perforated sheet adapted when in normal position to track right with respect to the channels of the tracker-board, of a lever for effecting the restoration of said sheet upon displacementthereof, pneumatics E and E combining to control said lever, the pneumatic E2 acting as a stop therefor, chambers and passages for an exhaust operating said pneumatics, valves operated to control ports leadingfrom the respective chambers and passages of the exhaust to said pneumatics, means for individualizing the pneumatics into the .set E and E/ or E and E2, to be operated upon separately by the exhaust dependent upon the direction of .displacement of the perforated sheet, and valves controlling the ports for admitting air to said pneumatics upon the restoration of said sheet to its normal tracking position.

18. In a musical or other instrument, a combination of two pneumatics, means for directly and independently operating said pneumatics, a third pneumatic connected to be directly operated by thewsame operating means, and Valves likewise directly controlled by said opernting means, whereby said third pneumatic muy be operated simultaneously with either of said [irst two pneumatics.

1). l'n a musical er other instrument, the combination et three pneumuties, exhaustchambers with seperate passages er channels leading to connect with two ef seid pneumatics und leading by further extension et' sri-irl seperate channels or passages te connect in cernmon with a. third pneumatic, und outwardly- Opening valves in said passages ler centre]- ling` said third pneumatic.

OLIVER H. ARNO. In presence ofAm J. M. Denim, J. E. R. HAYES.

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