US1584282A - Music-roll-feed mechanism - Google Patents

Description

May 11 1926.

J. 0. FOWLER nusxc ROLL FEED uqcmmzsm Filed March 14, 1921 -2 Sheeis-Sheet 2 fi I l 1| u l nl llu I- |H|l ||||n|- Q h M mm d .m \m w k ....,fi..u..,...........nnflufihuan m a an MN Q fi Patented May 11, 1926.

JONATHAN O. FOWLER, OF NEW YORK, N. Y., ASSIGNOR '10 GEORGE MESSIG, OF

BROOKLYN, NEW YORK.

mus'rononnrnnn MECHANISM.

Application filed March 14, 1921. Serial No. 452,206.

This invention relates to musical instruments preferably automatically operated by a motor which may be energized by the closing of an electric circuit either manually or by a coin-actuated device in the well known manner.

I preferably employ music-roll magazines or carriers adapted to carry a series of music-rolls whereby, without changing the latter by hand, the instrument may be enabled to play the selections of each roll separately at will, or to play the entire number of selections on all the rolls seriatim as a continuous performance.

I provide a new self-playing instrument arranged so as to permit the use of interchangeable music-rolls whereby any one of the tune sheets may be brought into operative position, simultaneously with the advance movement of the winding or take-up roll in order to draw the tune sheet over a tracker-board and to cause the operation of the music instrumentalities and then to afterward automatically rewind the tune sheet upon its roll after the tune has been played. Means are meanwhile provided for advancing the roll carrier a step after playing and rewinding each roll, to bring another roll into playing position.

lVith the above objects, and others which will be set forth below, in view, the invention consists in novel features and elements and combinations of the same; and a practic-able embodiment of the invention is represented in detail in the accompanying drawings forming a part of the specification, and in which- Figure 1 is an elevation of an instrument constructed according to my invention;

Figure 2 is a similar view showing some of the elements in different positions, the casing being omitted;

Figure 3 is a view in detail showing the music-roll rewinding mechanism;and Figure t is a front elevation of the entire device modified in some particulars and the operating mechanism at the right of the lower rolls being omitted'for clearness of illustration of the other parts and the entire drawings being somewhat diagrammatic.

In this invention I use a music-roll carrier or magazine 9, such as is in common use, comprising a horizontal shaft and spaced heads in which are mounted music-rolls 10 in a circular series, the said rolls having the ordinary means for detachable engagement with the roll carrier.

The roll carrier is revoluble but is only intermittently and automatically driven or moved by the turning of the slotted wheel 8 attached thereto at such time as the latter is driven by the pin 6 of the wheel 2 as explained below.

The numeral 1 denotes a continuously running shaft which may be connected with and actuated by a' suitable source of power as an electric motor (not shown) which latter may be started in operation by any preferred means, as for example, a manually actuated switch or coin-controlled device such as are now in common use in instruments of this type for this purpose. A friction belt 5 serves to connect a pulley mounted on and driven by the shaft 1 with a wheel 2. This wheel is constructed and arranged to rotate and at every revolution on its shaft 42 to cause the roll carrier to be advanced a certain predetermined distance so as to bring the tune sheet 11 of a. music-roll 10 in position to be played, during which movement the said wheel may be held in a' stationary position by means of a dog 3 controlled by a spring 3 and having a short projecting part as shown in Figure 1 or being made with a long extension 3 as in Figure 4 engaged with a notch 4 in the periphery of the wheel 9 at which time, or locked period of the wheel, the belt 5 may slip over the said wheel without rotating the same. After the tune sheet is played the dog 3 is released from the wheel 2 as hereinafter described. One end of the spring 3 may be attached to the pin 3 on the dog 3, the other end thereof being secured to the casing.

In operation, a pin 6 of the wheel 2 enters one of the radial slots 7 of a wheel 8 attached to the shaft 9" of the roll carrier 9-there being as many of these slots as there are music-rolls 10 in the roll carrierwhereby the slotted wheel 8 is caused to make a partial revolution and the said roll carrier will be thereby rotated a sufficient distance to bring one of the music-rolls into operative playing position with respect to the transfer arms 14 carried by shaft 14?, the said carrier 9 beingh-eld in its new position by suitable locking means as a spring cont-rolled dog 12 which enters a notch 1n the same and hold it stationary except when the wheel. 8 is being turned by the pin 6.

A continued revolution of the wheel 2 (before it has reached its limit of movement) produces a further automatic movement of the parts and causes its stud 13 to engage a dog 34 and to move it suffic ently (by turning the arm 14 of the shaft 14 as in Fig. 4 or by direct contact as in Figs. 1 and 2) to depress the transfer arms 14 one being mounted under tension (by spring 14 the ends of which are respectively secured to the arm 14 and to the casing) on said shaft on each side of the instrument the ends of which arms are superposed over the rod 11 at the free end of a tune sheet 11 of an adjacent music-roll 10 with which the free end of tune sheets used in instruments of this type is provided. 14 segmental rack bar 15 (a side view of which is shown in Fig. 2 and an edge view thereof in Fig. 4) is attached to the spring arm 14 and by its descent serves to rotate a gear 16, the pulley 16 of which turns by a belt 21 the pulley 17 to which the ratchet wheel 18 is secured, the two last named elements being fastened together but loose on the end face of the take-up roll 19 and held from independent movement in but one direction by the pawl 20 carried by said roll 19. The ratchet wheel 18 of the pulley 17 carries around the pawl 20 (fixed to the take-up roll 19) thereby rotating the latter at the same time that the active music-roll coinmences to be rotated on its shaft 42 by the tune sheet rod 11 being carried down by the arm 14.

By the operation of the last named parts the take-up roll is caused to make half a revolution, thus bringing the lower hook 22 formed in the flange 19 of the roll to its highest position (as shown in Figure 2) at the time the rod 11 of the tune sheet has been carried downwardly so that the tune sheet rod 11 will lie in front of and be delivered to the said hook, by which arrangement of elements the engaging meansas the hook 22of the takeup roll and the engaging means-as the rod 11of the tune sheet concurrently advance one toward the other, and the take-up roll 19 and the active musicroll 10 rotate or are driven simultaneously or in unison with an even and uniform movement.

As illustrated, during this operation the music-roll will move clockwise while the take-up roll moves anti-clockwise.

The said descent of the spring controlled transfer arm 14, which works in a slot- 28 in the upper part 28 of a movable rod 24, also causes the engagement therewith of the projection 23 at the lower end of the said slot whereby the rod 24 is caused to fall, and by the consequent operation of the therewith connected bell crank 24 (pivoted at 24 to throw a clutch 25 in a closed relation in respect to its gear 27 and the teeth 19 of the roll 19, whereby the continuously rotating shaft 26 will rotate the gear 27 which meshes with the toothed takeup roll and causes the latter to continue to revolve anti-clockwise in unison with the rotation of the clockwise moving active musicroll, and thus to wind the tune sheet 11 on the said take-up roll 19, thereby overlaying the rod 11, the shaft 26 carrying a gear 26 and being connected by gears 26 and 26 of the shaft 1 with the latter (which gear 26 moves anti-clockwise) the shaft 26 moving clockwise, the pawl 20 meanwhile slipping over the ratchet teeth 18 of the pulley 1'? as it is carried around by the roll 19 and the friction caused thereby and the engagement of the gear 16 and the teeth of the segment 15 serving to hold the pulleys 16 and 17 stationary and to thus prevent the transfer arm 14 from being raised by its spring 14 The tune sheet is now caused to pass across the usual tracker-board 10 and the selections of said sheet are played by the instrumentalities of the said apparatus in the ordinary manner.

At the time when the tune sheet 11 is nearly unwound from the roll 10 a perforation 11 in the face of the tune sheet serves in the well known manner to operate a suitable device for rewinding the tune sheet on its roll, as a pneumatic 10 (or an ordinary electric connection controlling my switching mechanism) whereby suitable movable means, as the bar 40 may be operated as by being moved to the left by the pneumatic, which bar by its depending lever 41, pivoted at its lower portion, may serve to close and operate the clutch 48, 42 and operate the parts in the following manner The said switching mechanism controlled by the pneumatic 10 may cause the bar 40 to be moved to the left, the said movement serving to push the pivoted lever 41 a sufficient distance to cause the clutch member 43 keyed to the constantly rotating shaft 44 (which may be connected by a belt 44 with a pulley on the shaft 1) to engage the clutch member 42 of the stripped musicroll shaft 42 that happens to be adjacent to and aligned with it, thereby rotating the clutch 42,

latter shaft in a direction contrary to its former movement (or anti-clockwise) and thus winding up the said tune sheet from the take-up roll 19 on its roll again, the tracker-board being now rendered inoperative in the customary manner.

At the time the bar 40 is moved to the left as described, the inclined projection 38 of the latter lifts up the rod 37 thereby raising the same and rocking the shaft 36 by the link 35 intermediate of the same. This movement of the shaft 36 will cause its arm 39 to bear against the pin 39 of the bell crank 24 on the opposite side of the instrument and cause it to rock on its pivot 24 thereby disengaging the gear 27 from the teeth 19 of the take-up roll 19, the said release movement taking place at the time the tune sheet rewinding operation begins. As soon as the clutch 25 is opened by the rod 37 and incline 38, and the rod 24 thereby raised the spring 14 of the transfer arm will raise the latter and the segmental bar 15 and the gear 16 and pulley 16 will turn clockwise as well as the pulley 17 which latter is now moved as before by the belt 21. The engagement between the pawl 20 and ratchet teeth 18 is such that the pulley 17 will carry around the take-up roll and commences its movement in a clockwise direction which movement of the latter occurs simultaneously with the closing of the 43 and the'consequent anti-clockthe active music-roll 10, both of the rolls 10 and 19 moving coincidently in a reverse direction to that of their former movement, the gears 27 and 29 being disengaged. In this case also the unwinding take-up roll is the rewinding music-roll commences to rotate on its shaft 42, both of said movements occurring in an even and uniform manner.

IVhile the active roll 10 is being rewound the now released ascending tune sheet rod 11 in its rewinding movement (shown in its upper position in Figure 4) will push upward the pin 33 of the spring controlled dog 33 and cause the wedge end portion 33" of the said dog to enter between the said clutch members 42, 43 and to thereby separate the same. When the roll carrier 9 is advanced again the rod 11 will move away from the pin 33 of the dog 33 and the latter and bar 40 will be moved to their original positions by the springs attached to the same, the music-roll rewinding operation having been completed and the pneumatic 10 then being in an inoperative condition.

The shaft 29 of the roll 19 is preferably made with a crank 31 by means of which, together with the spring 30, it will be normally held in its original position so as to ordinarily hold a hook 22 adjacent to a tune sheet rod 11 of the nearest music roll. In its upward movement the transfer arm wise rotation of turned at the same time that raises the rod 24 with it to its highest position. At the same time a projection 47 of said rod at the upper part 28 of the same is raised high enough to move the adjacent arm of a bell crank 32 upwardly whereby the other arm 32 thereof Will swing downwardly on its pivot 32 and withdraw the dog 3 from out of the notch 4 of the wheel 2, thereby releasing the said locking means on the return stroke of the transfer arm and placing the said wheel 2 in position to commence another operation of shifting theroll carrier and unwinding another music-roll, all of the parts of the instrument having been meanwhile restored to their original positions. If desired, a bell crank with long arms as 32 32 and pivoted at 32 as shown in Figure 4, may be used in place of the bell crank 32, 32 illustrated in Figure 2. In the meantime, the dog 34 will have been returned to its normal position by its notch 34 having become aligned with the pin 13 and thus allowing the said pin to pass therethrough and permitting the spring 34 to carry the dog 34 backward to its original locking position once more.

In case it is desired to stop the operation of the instrument afterthe playing of a single music-roll, the said movement of the bell crank 32 by the projection 47 may be dispensed with, in which case the locking dog will remain entered into the notch 4 of the wheel 2 and the further operation of the parts will cease, whereby, by the insertion of a coin, or otherwise, the bell crank 32, 32 may be again operated and the dog 3 released (in the well known manner usual in coin controlled devices) and the instrument thereby set in operation in order that single music-rolls may be operated separately and, if so desired, consecutively.

It will be noted that in accordance with my invention not only do the engaging means at the free end of a tune sheet and the engaging means of the take-up roll advance simultaneously toward each other the driving means of the take-up roll and the driving means of the music-roll operating coincidentlybut that I also disclose means for simultaneously driving one mem- 1 her of each pair of rolls (comprising the take-up roll and one of the music-rolls) eonsecutively, the said engaging parts in all cases traveling synchronously with an even and uniform movement throughout their entire operation. I thus provide automatic means for automatically driving the roll carrier, and alsoautomatic means for simultaneously driving the take-up roll and each of the music-rolls consecutively, the said concurrent movement of each of the said pairs of rolls occurring both at the winding and also at the unwinding operations of the same.

I wish it to be understood that I do not 1 desire to be limited to the particular use or the eXact details of construction shown and described, for obvious modifications will occur to persons skilled. in the art.

lVhat I claim ,as my invention is 1. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls, a take-up roll, means for driving the take-up roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, and automatic means foradvancing the roll carrier.

2. In a device of the class described, a music roll having a tune sheet, a roll carrier therefor, means to move the latter, a takeup roll having engaging means, and a com mon interlocking means to directly actuate and cause the take-up engaging device and the tune sheet to simultaneously radually approach each other until they become operatively engaged whereby the two said rolls will be rotated in opposite directions.

3. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls, a take-up roll, means for driving the take-up roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, the parts traveling with an even and uniform movement, and automatic means for advancing the roll carrier.

4. In a device of the class described, a music roll having a tune sheet, a roll carrier therefor, means to move the latter, a takeup roll having engaging means, and a common interlocking means to directly actuate and cause the take-up engaging device and the tune sheet to simultaneously gradually approach each other until they become operatively engaged whereby the two said rolls will be rotated in opposite directions, and also means whereby the said rolls may be simultaneously rotated with a movement contrary to their former ones, in combination with means for intermittently rotating the carrier.

'5. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls, a take-up roll, means for periodically driving the take-up roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, and automatic means for intermittently advancing the roll carrier between each of said periodic movements.

(3. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls, a take-up roll having an engaging device, means for periodically driving the take-up roll and each of the music-rolls carrying a tune sheet consecutively to respectively wind and unwind each of said pairs of rolls, coacting means to cause a tune sheet and the take-up engaging device to gradually approach each other until operatively engaged and both members of each of said pairs of rolls being driven concurrently both at the winding and unwinding of the take-up roll, and automatic means for intermittently advancing the roll carrier between each of said periodic movements.

7. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls, a take-up roll having an engaging device, means for periodically driving the take-up roll and each of the music-rolls carrying a tune sheet consecutively to respectively wind and unwind each of said pairs of rolls, coacting means to cause a tune sheet and the take-up engaging device to gradu ally approach each other until operatively engaged and both members of each of said pairs of rolls being driven concurrently, the parts traveling with an even and uniform n'iovement, and automatic means for intermittently advancing the roll carrier between each of said periodic movements.

'8. In combination, a rotatable roll carrier adapted to contain a plurality of music-rolls, a take-up roll, means for periodically driving the take-up roll and each of the musicrolls consecutively to respectively'wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, and automatic means for intermittently advancing the roll carrier between each of said periodic movements, and also means for locking the roll carrier'in position after each movement thereof.

9. In combination, a rotatable roll carrier adapted to contain a plurality of music-rolls having tune sheets, a take-up roll, means for driving the takeup roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, and automatic means for advancing the roll carrier, and also transfer means for delivering the end of a tune sheet tc the take-up roll.

10. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls havin tune sheets, a take-up roll, means for driving the take-up roll and each of the music-rolls consecutively to wind and unwind each of said pairs of rolls, both members of each of said pairs of rol s being driven concurrently throughout their entire operation, and automatic means for advancing the roll carrier, and also transfer respectively i means for delivering the end of a tune sheet to the take-up roll, the parts traveling with an even and uniform movement.

11. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls having tune sheets, a take-up roll, means for driving the take-up roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, and automatic means for advancing the roll carrier, and also transfer means for delivering the end of a tune sheet to the take-up roll, the said transfer means being also adapted to be moved by the music-roll.

12. In combination, a rotatable roll carrier adapted to contain a plurality of musicrolls having tune sheets, a take-up roll, means for driving the take-up roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation, and automatic means for advancing the roll carrier, and also transfer means for delivering the end of a tune sheet to the take-up roll, and locking means for the roll carrier controlled by the transfer means.

13. In combination, a rotatable roll carrier adapted to containa plurality of musicrolls having tune sheets, a take-up roll, means for driving the take-up roll and each of the music-rolls consecutively to respectively wind and unwind each of said pairs of rolls, both members of each of said pairs of rolls being driven concurrently throughout their entire operation. the parts traveling with an even and uniform movement, and automatic means for advancing the roll carrier, and also transfer means for delivering the end of a tune sheet to the take-up roll, the said transfer means being also adapted to be moved by the music-roll, and locking means for the roll carrier controlled by the transfer means.

14. In a device of the class described, a take-up roll having engaging means, a plurality of music-rolls with tune sheets having engaging means at their free ends, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, and means to cause the engaging means of a tune sheet and the engaging means of the take-up roll to travel toward each other concurrently until they become operatively engaged.

15. In a device of the class described, a take-up roll having engaging means, a plurality of music-rolls with tune sheets having engaging means at their free ends, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, and means to cause the engaging means of a tune sheet and the engaging means of the take-up roll to travel toward each other concurrently until they become operatively engaged with an even and uniform movement.

16. In a device of the class described, a take-up roll having engaging means, a plurality of music-rolls with tune sheets having engaging means, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, and for driving the latter and one of the music-rolls simultaneously so that the engaging means thereof shall travel evenly toward each other and coincidently with each other until they become operatively engaged.

17. Ina device of the class described, a take-up roll having engaging means, a plurality of music-rolls with tune sheets having engaging means, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, and for driving the latter and one of the music-rolls simultaneously so that the engaging means thereof shall travel toward each other coincidently with each other, in combination with means for intermittently rotating the carrier.

18. In a device of the class described, a take-up roll, a plurality of music-rolls hav ing tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so that each in turn shall be adjacent to the take-up roll, and automatic means for causing the latter to rotate in commencing its winding movement at the same time that the tune sheet of theadjacent music-roll is operated to cause it to commence its unwinding movement, the two said movements coinciding witheach other.

19. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so that each in turn shall be adjacent to the take-up roll, and automatic means for causing the latter to rotate in commencing its winding movement at the same time that the tune sheet of the adjacent music-roll is operated to cause it to commence its unwinding movement, the two said movements coinciding with each other, in combination with means for intermittently-rotating the carrier.

20. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, the latter and the adjacent tune sheet having engaging means, and a common means to cause the engaging means of the take-up roll and the engaging means of the tune sheet to simultaneously approach each other.

21. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, the latter and the adjacent tune sheet having engaging means, and a common means to cause the engaging means of the take-up roll and the engaging means of the tune sheet to simultaneously approach each other with an even and uniform movement.

22. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, the latter and the adjacent tune sheet having engaging means, and automatic means to cause the engaging means of the take-up roll and the engaging means of the tune sheet to simultaneously approach each other with an even and uniform movement.

23. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, the latter and the adjacent tune sheet having engaging means, and means to cause the engaging means of the take-up roll and the engaging means of the tune sheet to simultaneously approach each other, and also additional means for continuing the movement of the said engaging means.

24. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, the latter and the adjacent tune sheet having engaging means, and means to cause the engaging means of the take-up roll. and the engaging means of the tune sheet to simultaneously approach each other, and also additional means for continuing the movement of the said engaging means, and means for intermittently rotating the carrier and for locking the parts in position.

25. In a device of the class described, a take-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be in turn adjacent to the take-up roll, automatic means for causing the latter to rotate at the same time the tune sheet of the adjacent music-roll commences its unwinding movement, and automatic means comprising transfer arms for delivering the end of the tune sheet to the take-up roll.

26. In a device of the class described, a

take-up roll, a plurality of music-rolls having time sheet-s, a common carrier for the latter, means for advancing the music-rolls consecutively so as to to be in turn adjacent to the take-up roll, automatic means for causing the latter to rotate at the same time the tune sheet of the adjacent music-roll commences its unwinding movement, transfer arms for delivering the end of the tune sheet to the take-up roll, and locking means for the parts, the said transfer means controlling said locking means.

27. In a device of the class described, a take-up roll, a plurality of music rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to to be in turn adjacent to the take-up roll, automatic means for causing the latter to rotate at the same time the tune sheet of the adjacent music-roll commences its winding movement, the said Winding movement means being controlled by the tune sheet, transfer means for delivering the end of a tune sheet to the take up roll, means for holding the latter out of engagement with its actuating means and the tune sheet of a music-roll, said transfer means controlling the holding means.

28. In a device of'the class described, a talre-up roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be adjacent to the takeup roll, automatic means for causing the latter to rotate at the time the tune sheet of the adjacent music-roll commences its unwinding movement, transfer means for delivering the end of a tune sheet tothe take-up roll, and means for holding the take-up roll out of engagement with its actuating means and the tune sheet of a music-roll, said transfer means controlling the holding means.

29. In a device of the class'described, a takeup roll, a plurality of music-rolls having tune sheets, a common carrier for the latter, means for advancing the music-rolls consecutively so as to be adjacent to the take-up roll, automatic means for causing the latter to rotate at the time'the; tune sheet of the adjacent music-roll commences its unwinding movement, transfer means for delivering the end of the tune sheet to the take-up roll, means for holding the takeup roll out of engagement with its actuating means and the tune sheet of a music-roll, and locking means for the parts, said transfer means controlling both the locking means and the holding means.

30. In a device of the class described, a tune-sheet-roll, a take-up roll having an engaging device, means to automatically cause the latter and a tune sheet to approach each other evenly and gradually until they become operatively engaged and move the two rolls simultaneously in predetermined directions, means to automatically stop the rotation of the two rolls simultaneously at the end of their concurrent movements, means to automatically move the two rolls simultaneously in directions contrary to their former movements, and means to automatically stop the rotation of the two rolls simultaneously at the end of their last named concurrent movements.

Signed at New York, in the county of New York and State of New York, this 11th day of March A. D. 1921.

JONATHAN O. FOWLER.

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