US1647112A - Spool mechanism for musical-instrument-player devices - Google Patents

Description

Oct. 25, 1927. c. H GREEN SPOOL amen/ms! FOR MUSICAL mswnmmur PLAYER nsvrgns Filed Oct. 5, 1923 3 Sheets-Shea?- 1 fimzo CLIFFORD HG E &

mm" MN mwh i mm M nwwmw min fiuw E a,

Oct. 25,1927. c. GREEN 7 SPOOL MECHANISM FOR MUSICAL INSTRUMENT PLAYER DEVICES Filed 001. a, 1923' s S&eets-Sheet 1, Q 1 G 1 1 N; E m R E-Z- Q (3 JR/e CLlFFORD H. GREE Oct. 25, 1927. c. H. GREEN SPOOL MECHANISM FOR MUSICAL INSTRUMENT PLAYER DEVICES Filed Oct. 5, 1923 s sheets-sheets higgiillllll/llr/l nnnnnn'. nnnnnnnnnnnnnnngnm [5 O f g; 49 '51 473L 21 2297 4 6 22 2 716 72101, yd/wa CLIFFORD H. GREEN Patented Oct. 25, 1927.

run?! ran STATES retina cnrrronn H. ennnn, orenarrn BABIPE MIQHIGANQASS'IGNOR,BY.MES1\TE ASSIGN- EN Z To AU aria usic an Ins'rnuiirnNjr centenary, or erman narrns,

vrronrean, A conronarron or nnrewaan.

SPOOL mnormnrsivr ron AMUSICAL-INSTRUMENT-PLAYER nnvrons.

Application .filedL0ct0'b6T-3, 1923. Serial No. 666,220.

My present invention relates 'to playerdevices of therein-controlled type, and 'has more particular reference to-the' mechanism which unwinds gthQ record-sheet past the 5 tracker-board fromthespool containing the same while the musical selection is :being played and which, after the selection :has been played will re-wind the record-sheet upon the original. spool and stop (the sheet .1 in. a position where the1t1'acker-boa-rd may, if desired, 'be again brought into contact therewith, close to the,first' pei'foi'atio11s ad j acent to the startingvendj of the recordssheet.

In this connection, 1 have provided devices l5 l'lltl'f-WVl'll he automatically brought intooporation to govern the speedofthe reTWiHCling operation; and to slow up and stop such operation at the proper time and'inthe proper manner to stop the sheet in I the ,laforesai'd position, connected to :the taken-up spool, ready for a repetition; of-the nnwindinganid revinding operation. (I have also; provided devices which in the event the ire-Winding mechanism fails to; perform its ;functions at the end oftheselection, ill'operate automatically to prevent the record-sheet :fIOII] being torn or damaged @ELIlCl-WhlCll, if such an emergencyarises,:Will operate automatirally to prevent jamming or straining of any part of the mechanism. :This structure also containsa novel brake device that-is actuated automatically to stop the rewvind oftherrecord sheet and which issetin operation througln the medium of the re winding mechanism. a

It will beobvious thatiamong the objects of my invention are ,the provision of amechanism, having the above-mentioned chanacteristics which is so compact in constr-uction that: itmay be placed 5 in g the space allotted to it i-n a drum or magazine containing a plurality of-suchinechanisms. :It is also simple; in: the"arrangement of its parts, so that there is; nothing to; -get out of; order, an d; it is dependable anrl effective in operat-ion.

'1 prefer .to carry out my [invention in substantially (the manner -;hereina'fter "described,referencebeing had to the acriompanying drawings that form-a part of this 56 specification.

T11) the drawings "Figure .1 is autop plan of oneof my improved spool-mechanism .units of a coincontrolled player-device detachedxfrom the 5 cylinder or drum upon which a plurality of suclrunits areusually mounted.

igQ 2 is ,a sectional view, looking at the right-hand end of v the structure shown in Figure 1, with the .adjacentside plate for journaling orsu-pporting the elementsre moved but shownin'broken lines.

Fig. 3is an end viemiloolringl.at;tl1e lefthandiend ofthe structure shown iii-.Figure 1, witha .portion of the adjacent v journaling andsupporting plate'broken away.

".Fig. 4 is a longitudinal side elevation. looking at the left side of the structure shorvndnliigure*2, showing one part of the automatic throw-off mechanism in detail.

Fig. 5 is a longitudinal side elevation, loolgingfat the right side of the structure shown inFigureQ showing another pa rt of the automatic throw-off mechanism in de taihavhichpart also;serves as part ofthe means. forslorving up and stopping the re- Winding operation. V

;E- ig., 6,is abottom: plan of the device shown in l?i.gure-1, the parts beingin normalcposition forislowing up vand stopping the rewinding operation. a

iFlgUTlS a view similar. to Figure .6, drawn schematically and showing the a relative positions of tlieiparts when the mechanism for slowing up and stopping the reewinding is thrown out of operation.

:Inz the drawvingasl have. employed similar referencev characters todesignate the same parts "wherever they occur 1 in [the several views and, by referring tosaidgdrawings, itiwill be seenthe structureis of aunitary character and, comprisestwo side a plates 10 and :11, it respectively, that are connected together :hy j'parallel, longitudinally, disposed tie-rods '12, .13 and 54, two Of WhlCh tlQ-I'OdS, 95 asmwill hereinafter ,appear,- act as guides for therbifurcatedvarmsor lateral extensions of certain traveling blocks or threaded. sleeves record-carrying spool.

used in connection with the throw-off mechanisms and with the mechanism for slowing up and stopping the re-winding operatlon. Adjacent one of the upper corners of the plates and 11 are mounted the spindles 1 1 and 15 of the take-up spool 16 which is of the [usual type, being cylindrical in form and having end flanges 17 to guide the paper record-sheet as it winds thereon from the One of the flanges 17 has a large gear 18 secured to it outside of the cylindrical portion of the spool 16, while the opposite flange of said spool has an enlarged hub or axial embossment 19 that is acted upon by a suitable brake-arm 20, as will hereinafter be described. I

Suitably mounted in the upper portions of plates 10 and 11, opposite the take-up spool 16 are the devices for receiving and journalling the removable record spool 21,

which is also of theusual type, having end flanges 22, and which has wound upon it, when placedin-the unit, the perforated recordsheet 23. The spool receiving and journaling devices just above mentioned, comprise a retractable bolt 24, mounted in a cylindrical housing projecting outwardly from the side plate 10, the projected end of said bolt passing through the plate 10 and I entering an axial aperture or recess in the adjacent end of the spool 21, and a pinion 26, mounted to turn upon a short shaft 27 projecting inwardlyfrom plate 11, which pinion has a pair of clutch-pins 28 projecting from the hub thereof that enter correspondin apertures in the adjacent end of the spool 21 when they are brought into alinement therewith. The pinion 26 is provided with an annular groove 26" and is maintainedupon shaft 27 by means of the depending flange 29 on the upper horizontal arm of an inverted L-shaped bracket 30, secured to the side plate 11 so as to overhang the pinion so that the flange 29 projects into the annular groove 26 as seen at the rightpinion 26, when rotated during the re-wind- 7 ing of the record-sheet, will thus rotate the 28 and removed from the unit.

spool 21 and, by retracting bolt 24, the spool 21' may be withdrawn from the clutch-pins By retracting bolt 24 the spool 21 may be removed.

The gear 18 of the take-up spool 16 is engaged and driven/by a rotatable spur-gear 31, whichderives its motion from any suitable source of power and is moved bodily by certain pneumatics or other elements of the have not been disclosed herein and therefore i need not be further described.

The pinion 26 meshes with a large gear 32 mounted on a longitudinal rod 33 conn-ecting the side plates 10 and 11. A comparatively long coiled spring 34 surrounds this rod 33 practically throughout its length and has one end connected to the hub of the gear 32, while its. opposite end is connected to a block 35 which is mounted to turn on the opposite end-part of the rod and to which block the brake-arm 20 is rigidly connected. The spool 21 containing the record-sheet is not connected directly with the take-up spool 16 except through the medium of the recordsh-eet 23 and, when the take-up spool 16 is rotate'd'by the spur-gear 31 it will cause a rotation of the spool 21 by the unwinding of the record-sheet therefrom. This actuates pinion 26, which drives the gear 32 and winds up the spring 34 upon the rod 33. The winding of the spring 3 1 is for the purpose of creating and storing the power or motive force by which the record-sheet may be rewound upon its spool 21. Under normal conditions, when the last of the sheetperforations have been reached, the aforesaid certain pneumatics or other elements of the player-devices-raise the spur-gear 31 so thatno further winding motion of the spool 16 is had. The lifting of spur-gear 31 leaves the spool 16 free to rotate, and it is then turned in a reverse direction through the action of the spring 34 which now begins to rewind the record-sheet, the latter being driven through the large gear 32 and pinion'26.

lVhile the spring 341 is being wound tighter, the brake-arm 20 is being pressed with increasing friction against the hub 19 of the spool 16. This, however, does not effect the driving of the spool 16 by the spur-gear 31 while the music is being played, as the spurgear is actuated by a motor strong enough to overcomethe friction of the brake-arm but upon the completion of the selection and the disengagement of spur-gear 31, the spool 16, except for the action of the brake-arm 20, would rot-ate too rapidly and, at the end of the re-winding; action the momentum of the spool would tend to carry it'beyond the desired stopping point and wind the record-sheet reversely thereon. The brake-arm, however, exerts a compensating action frictionally against the hub 19, the greatest pressure being applied at themoment rewinding is started and gradually decreased as the rewinding continues. such decrease being due to the slacking of the spring 34:.

In order to stop the re-winding action at the desired time without causing a sudden jar or jerk upon the record sheet, I have provided a novel mechanism which will now be described. Mounted in the side plates 10 and 11 isa rotatable screw 36, which is of alength to extend from one side plate to the other, the endparts thereof being reduced and projecting through said plates, as seen in Figure of the drawings. Shoulders 37-and 38 are formed by reducing the 1 '1 36 is rotated while the record-sheet is being wound upon said take-up spool. YVhile the screw 36 is rotating, it feeds a traveling block 40 carried thereby, whichblock is bored and interiorly threaded to provide for this movement and is provided with a lateral extension 41 that is bifurcated so as to pass upon opposite sides of thecross-bar or tie rod 13. The tie-rod 13 thus prevents rotation of the block 40 while it is being moved longitudinally upon the screw 36. Interposed between the traveling block 40 and the pinion 39' is a short coiled spring 42 that surrounds the screw 36, and a leafspring 43 presses against the outer end of said screw adjacent said pinion to maintain the screw in itsfnormal position, with the pinion 39 in mesh with the gear 18. When the end of the selection has been reached, the traveling block 40jwill have been movedto some position alongthe screw'36,'as shown "in dotted lines in Figure 6. The driving.

spur-gear 31 having been disengagedfrom the gear 18 onthe take-up spool, the power from the tightly coiled spring 34 begins to unwindthe reoordl-sheet from the spool'16 which, through the gear 18 and pinion 39, rotates the screw 36 in the opposite direction and returns the traveling block 40 to normal tpositioinand in doing so presses the same against the interposed spring 42, com? pressing it until the friction of the spring acting between and upon-therotating pinion 39 and the non-rotatable block40 is sufficient to-counteract the re-Winding action of the power-spring 3i, whereupon the entire mechanism will stop. This will be at such a point on the record-strip that the initial perforations therein will be in a position to be again'engaged by the tracker-board whenever the selection is to be played; V

If, for any-reason, the spur-gear31 should not be disengaged from the large gear 18 when the end of the record-sheet had been reached, after the selection had been played. the record-sheet would continue to be-wound upon the take-up spool 16 and would be torn from the spool 21. In such a contingency, in order to avoid such tearing of the record-sheet, I provide a longitudinal slot 44 in the record-spool 21' and insert therein a tape 4'5, secured to and extending from the end of the record sheet :23, such structure being illustrated in Figure 7 of the drawings. a, This method of securing the recordsheet to its spoolpermits the sheetto be entirely withdrawn from the spool when the end of the sheet has been reached, and the connection hetween the talie up spool 16 and the record spool 21 maythus be broken with out damage to-the sheet. Obviously, however, the record-spool would-then Ebefree to bedriven in a reversed direction, asin .re-winding, by the power-sprinsgi34, th'e'pinions 26 and gear 32, and the continued driving of the take-up spool 16, :by the spur-gear 31, would continue the rotation of thescrew 36 and result in jannniingthe traveling block 4:0 against the side plate 10. In order to avoid this, I arrange to disconnect the pinion 39 from the gear'18, and to this end' I have provided a threaded rod L6, which extends from one side plate to the other and is journaled therein so that it may be rotated; A pinion 47 is fast on this rod, preferably beyond the threaded portion thereof and is in 'HlQSll with the gear 32 that is actuated by the unwinding of the powerspring-34. During the playing of the selection and the unwinding oftherecord-sheet from the spool 21,the threaded rod 1-6 is rotated and a traveling bloclr48 carried thereby is moved from adjacent one end'of the rod toward the other end thereof.

Mounted upon the rod, but not engaged by the threads thereof, is a compressible'sleevestructure consisting ofa coiled expansion free to move longitudinally thereonfindependently of the threads of said rod. Under normal operation of the device, the traveling :block 48 will not be moved toward this compressible sleeve far enough itofcontact with same, but whenever the hereinbefore' mentioned contingency arises, thislblock 48 will travel down into contact with the adjacent end of the compressible sleeve 4950 and carry the same to the end of the rod,

where-the opposite end of said compressible sleeve 4950 will engage with, a lateral pro- 7 jection or pin 51 carried upon the adjacent end of a rocker-arm 52,whic'h latter is ful'- crumedintermediate its .ends on the sideplate 10 and at its opposite end is engageable with the reduced projecting end 3630f the rotatable screw 36. The arm 52 will be rocked by the thrust of the compressible sleeve 49%50 and shift the screw 36 bodily in a lon itudinal direction, againstthe ten -r sion ofleaf-springAS, until. the pinion'39 has'been shifted out of mesh with thegear 18; the screw 36 will then nol'o-nger bee-r0:

tated by the take-up spool 16; the traveling block 40 will remain stationary upon the screw 36; and the structure-will be maintained in this condition without damage to any portion of the unit although in the meantime, the driving spur-gear 31 may 0011-.

. tinue to actuate the gear 18 and rotate the take-up spool 16 upon which the recordsheet has been wound. The traveling-block 48 on the threaded rod 46 has a bifurcated arm 53 that extends laterally therefrom into engagement with the tie-rod 1 connecting the side plates and 11, so that rotation of the block 48 is prevented in the same inanner asvis that of the block 40, heretofore described. The spring 49 of the compressible sleeve cushions the action of the block 48 and thus prevents a sudden jar to the mechanism, and gradually slowing down the further longitudinal movement of block 4-8 on the rod 46 and finally stopping the motion of the gearing and other mechanism that has been actuated by power-spring 34. 4

When a new spool is to be placed in position the attendant shifts screw 36 to disengage the pinion 39 from the take-up spoolgear 18, whereupon the record-sheet may be manually wound upon its, spool 21 and the latter removed by retracting the bolt 24;. The new spool is then inserted in position and the end of the sheet drawn therefrom andwound upon the spool 16 (with the pinion 39 still disengaged) until the first per-- forations are below the tracker-board whereupon the pinion 39 is moved back into mesh with gear 18. v V

I have herein disclosed my inventionin connection with a player-device of the automatic coin-controlled type, which is merely a typical embodiment, as it is apparent the structure with but slight alteration may be adapted for use in connection. with other types of player-devices and mechanically operated musical instruments. It will be un derstood that I vdo not herein limit myself to any particular type of device, and such changes or modifications as may be made are fully contemplated as coming within the V record-sheet is wound, a take-up' spool, andscope of the appended claims.

WVhat I claimis: 1

1. In a device of the class described, a record-sheet, a'record-spool upon which said record-sheet is wound, a take-up spool, and means-operated by said record-spool and acting upon said take-up spool to retard the re-winding of said record-sheet-upon said record-spool after it has been unwound therefrom by said take-up spool, i

2. In a device of the class described, a recordheet, a record-spool 'upon which said means operated by the unwinding of said record-sheet from said record-spool for storing power to retard the re-winding of said record-sheet upon said record-spool.

3. In a device of the class described, a record-sheet, a record-spool upon which said record-sheet is wound, a take-up spool, and

meansoperated by said record-spool andacting with variation upon said take-up spool to retard the re-winding of said recordsheet upon said record-spool after ithas been unwound therefrom by said take-up spool, such variation in the action of said means being proportionate to the amount of said record-sheet which is unwound from said record-spool.

4:. In a device of the class described, a record-sheet, a record-spool upon which said record-sheet is wound, a take-up spool, and meansoperated by the unwinding of said record-sheet from said record-spool for storing power to retard the re-winding of said record-sheet upon said record-spool, the de' acting upon said spool-retarding means and actuated by the unwinding of said recordsheet from said record-spool to increase the power stored in said power-storing means as said record-sheet is unwound from said record-spool. l

7. In a device of the class described, a record-sheet, a record-spool upon which said record-sheet is wound, a take-up spool, a geartrain actuated by the unwinding of said record-sheet from said record-spool,a powerspring operatively connected to said geartrain and wound by the actuation thereof, and braking means acting upon said takeup spool and operatively connected with said power-spring.

8. In a device ofthe class described, a rec- V ord-sheet, a record-spool upon which said record-sheet is wound, a take-up spool, re-

leasable means for actuating said take-up spool to unwind said record-sheet from said record-spool, and means operated by such unwinding of said record-sheet for storing power increasingly as said record-sheet is unwound to re-wind said record-sheet upon 6. Ina device of the class described, a,

said record-spool and to retard such re-.

winding, whereby, when said take-up spool actuating means is released, said record-sheet will be re-wound upon said record-spool and v the decrease in the stored re-winding power,

whichv decreases as such reswinding progresses, will be proportionate to the decrease in-the power acting to retard such re-win'ding.

9. In a device of the class described, 'a record-sheet, arecord-spool upon which said record-sheet: is'wound, a take-up spool, releasable-means for actuating said take-up spool: toiun-windvsaid recorchsheetct'roni said, record-spool, a. power-springarranged to be wounctbysuch unwindingof said: recordsheet. and} tocfi'ect the rewindingf thereof,- when permitted,and=a brake acting. upon saidtake-up spool and actuated by said powerspring toiretard the rewinding of said recordsheet, whereby, when said: take-up spool. actuating means is released, said powerspring-Willa effect the re-winding of said-record-sheet upon said record-spool and will retard-such rewindingthrough the action of saidlbrakeupon said take-upspool, the retarding action of said power-spring being proportionate to; the lie-winding action thereof. a l

10. In a device of the class described, a record'-sheet, arecord-spool upon which said 7 record-sheetis wound, a take-up, spool, re-

power-spring operatively connected to saidgear-train and wound by: the actuation thereof, releasable means'for actuating said take-up spoolto unwind said record-sheet from said record-spool, and a hrakegopera tively connected with i said power-spring :and engaging said take-up -spool, wherebyg upon therelease of: saidtakeaip, spool actuating means, said record-sheet is re-woui-d upon said record-spool by said; power-spring, and gear-train and the braking efiectot said brake upon said take-up spool-is decreased.

12. In device of theclass described, a record-sheet, a record-spool upon which saidrecord-sheet is wound, a take up spool,

means for rotatingasaid take-up spool to Wind said record-sheet thereon from said record-spool, separate means for re-winding said record-sheet upon said recordfipool, a shaft, a traveling block movable along said shaft during"?- the re-zwind'ingofjsa'id record-sheet, a deviceactuated byuthe rotation of, said take-up spool, and, frictionmeans; in;

terposed, betweensaid, device and said block, whereby the movement a of said block along said shaft may causei'rictional engagement betwee'nsaid. device andsaid meansv l3. llnfandevice of the class described. a, record-sheet, arecordrspool upon which said reco'rdsheet:iswound, a take-up. spool, HlGaIISUfOI' rotating said takeup spool to wind said, record-sheet thereon from said record-spool, separate, means for, unwinding said record-sheet from. said ake- 19813001 and re-.win.ding it upon said recordf'spool, a, wormsshaft, traveling block propelled alongsaid, wor-lnrshaft as said. record-sheet is unwound from saidv take-up spool, a device carried upon said, worin shaft and: actuated by the rotation'of said takesup spool, and friction means interposed between said block andmsaid device,whereby,as said record-sheet is unwound from said take-up spool; said block will. travel along Said worm-shaft, encounter said friction means and cause itto, engagesaid device andthere by retard and subsequently stoptheunwinding of said record-sheet. from said take-up spool. I

1,4. In a, device of the class. described, a

record-sheet,v a record-spool; upon which said record-sheet is. wound, a take-upspool, means tor rotating said tal e-up, spool to wind said record-sheet thereon, separate means-for ire-winding said record-sheet up.- on-saidr record-spool, worm-sliaiit -a traveling block movable longitudinally thereon from; adj acentione endtowards the other end otsa d wor n shaft during thew-inding 0st sa -:1 record sheet upon, said take-up spool,a

device fixed on said wor1n-shat and actur ated by the rotation; of said take-up spool,- and means interposed between said device and sa-idblocls whereby to cause a frictional ns eementbetween said, evice, a said rlfiea-nswhen the latter is engagedby 'said ockr' 4 15; In} a device oi the-class desc 'sih'ed a record-sheet, record-.spool upon. which sa-idz record sheet is wound, a-take-up spool,

neansi'f windisald recond-sheet thereon, a worm actuating said takeruppepool, to

shatt, a" traveling block HlOVfl'b16-lQ11gltl1; dinal y on said Worm-Shaf om; nd; t wards one end 7 thoreot during; the winding and unwinding of said record-sheet upon and "from said; itakeeup spool, respectively, a deviceifixedzon saidworm h fit: n a uated by-therotation ofinsaid take-upspool, and: acoiledexpansion-spr ng. utr imding said worm-shaft between said; devicezand said block, whereby, when said block 5 moves is compressed" into frictional enga ement I saidrecord-sheet is wound, a take-up spool, means for rotating said take-up spool to wind said record-sheet thereon from said record-spool, separate means for unwinding said record-sheet from said take-up spool and re-winding it upon said record spool, a worm-shaft having actuating means through which it is rotated by said take up spool rotating means, a traveling block engaged by said worm-shaft and moved thereby away from and towards one end thereof as said take-up spool is turned respectively in one or the other direction,- and a coiied expansionspring surrounding said wormshaft adjacent its actuating means, saidexpansion-spring being positioned to be engaged by said'block and compressed against saielactuating means to frictionally retard and subsequently: stop the re-winding- 01 said record-sheet upon said record-spool.

"17. In a device of the/class described, a record-sheet, a record-spool upon which said record-sheet is wound, a take-up spool, means for rotating said take-up spool to wind said record-sheet thereon from said record-spool, separate means for unwinding Said record-sheet from said take-up spool and re-winding it upon said record-spool, a worm-shaft actuated by said take-up spool rotating means, a traveling block engaged by said worm-shaft and reciprocable longi- 'tudinally thereon, a pinion fast on said worm shaft and engaged by said-take-up spool rotating means, and a spring surrounding said worm-shaft and adapted to be compressed between said block and said pinion when the former approaches the latter, whereby to frictionally retard and subsequently stop the rotation of said take-up spool at the end of the re-wlnding operation.

'1'8.In a device of the-class described, a record-sheet, a: record-spool upon which said record-sheet is wound, a take-up spool, a

first means for rotating said take-upspool to wind said'record-sheet thereon from said record-spool, asecond means for unwinding said record-sheet from said take-upspool 'andre-winding it upon said record-spool,

a third means disengageably connected with and operated by said first means, and a fourth means actuated by said second'means to effect the disengagement of said third from said first means.

19. In a device of the class described, a

record-sheet, a record-spool upon which said record-sheet is wound, a take-up spool,

means for rotating said take-up spool to pingthe unwinding of said record-sheet means for-retarding and subsequently. stopping the unwinding of said record-sheet from said take-up spool at the end ofthe re -i winding operation,a worm shaft actuated by said rewinding means, a traveling block engaged by said worm-shaft and reciprocablelongitudinally thereon,jand means whereby the-movement of said block beyond a given point will effect the disengagement of said retarding means from said rotating means, 1 I

21. In a device of the class described, a record-sheet, a record-spool upon whichsaid record-sheet is wound, a take-up spool, means for rotating said take-up spool to wind said record-sheet thereon from said record-spool, means for unwinding said record-sheet from said take-up spool and re winding it upon said record-spool, an end wise movable worm-shaft'actuated by said take-up spool rotating means, a traveling blockengaged by said worm-shaft and reciprocable longitudinallythereon, a pinion fast on said worm-shaft and engaged'by said take-up spool rotating means, and means actuated by said re-winding means for shifting said worm-shaft endwise to disconnect said pinion from said rotating means. i

22. Ina device of the class described, a record-sheet, a record-spool upon whichisaid record-sheet 'is wound, a take-up spool, means for actuating said take-up. spool whereby saidrecordsheet is unwound from said' record spool, a worin-shaft,-=a pinion v thereon rotated by said take-up spool actuating means, a traveling block carried upon said worm-shaft and reciprooated thereby, a friction element engaged by said block upon its movement in one direction, and means for bodily shifting said worm-shaft wherebysaidpinion is disengaged from its actuating element. I a

23; In a device of the class described, a record-sheet, a record-spool upon which said record-sheet is -wound, a 'take upgspool, means for actuating said; take-up "spool wherebyv saidrecord-sheet is unwound from said record-spool, a geartrain actuated by the unwinding. movement of said recordspool, a colled power-spr1ng operatively contake-up spoolion nected to said gear-train and Wound by the actuation thereof, a worm-shaft, a pinion thereon rotated by said take-up spool actuating means, a block reciprocated by said Worm-shaft, a friction element engaged by said block upon its movement in one direction, and means for longitudinally moving said Worm-shaft to disengage said pinion from its actuating means.

Signed at Grand Rapids, county of Kent 10 and State ofMi0higan, this eleventh day of September, 1923.

CLIFFORD H. GREEN.

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