US1572974A - Music-leaf turner - Google Patents

Description

Feb. 16 1926. 1,572,974

A. J. TUNER MUS IC LEAF TURNER Filed July 25, 1924 2 Sheets sh9et 1 INVENTOR.

2 ,t Mits ATTORNEYS.

Feb. 16 1926. 1,572,974

A. J. TUNER I MUSIC LEAF TURNER Fil@d July 251 1924 2 Sheets-Sheet 2 IN1/amm cf. Tun/eil* A TTORNEYS.

?e.tented Feliu l, QZ.

RTNT @Filltl AXEL JULIUS TUNR, OF GOTTENBORG, SWEDEN.

BSIG-LEAF TUR-NER.

Application fied my 25, 1924. serial No. 728,233.

To all til/icm may conce/rn:

Be it known that l, AXEL JULrUs TUNR, a subject of Kingdom oi Sweden, residing at Gottenhorg, Sweden, have invented certain new and useful improved willusie-Leal` rfurncrs, of which the following is a specilication.

rllhis invention relates to apparatus for turningv over the leaves in a music book mechanically, when pla-ying', so that the per 'former need not interrupt his execution for the purpose of turning` the leaves by hand. 'ihe object 01' this invention is to provide apparatus ol the class mentioned, which s ready lier use and easy to operate hy neans of the toot or by the knee.

Another object or" the invention is to pro* vide a leaf turning apparatus, which is quick, reliable andsilent in its operation. A further object of the invention is tc provide an apparatus of the class mentioned, which is rather cheap in construction and which can be easily applied on any music stand, such as usually used by n violin player as well as music stands on pianos or the like. Further advantages ol the improved music leaf turner will he clearly understood trom the following` description and 'the drav-.fings relating thereto.

An embodiment of the invention is illustrated in the accompanying drawings, wherein 'Figzl is a side view elevation of a music stand of the common type with the improved device applied.

Fig. 2 is in a larger scale a view ol the rear side oit the music stand snowing the new apparatus attached.

Fig. 3 shows the same parts as in Fig. 1out l'roin the iron' side und with the i1- paratus during' the lirst stage of op ation.

Fig. 4 is the same view Fig. 2, hut with the apparatus in position to turn oacA a leal. in order to 'play the same piece a second time.

Fig. .5 is a plan view or Figure ihowing,l the apparatus in a somewhat later .stage of operation than in Fig'.

6 is n View ofthe saine character as Fig. V5, but illustrating the 'position ol the apparatus hetero the completion ol the turning movement.

Fig. 7 is a side View ot the apparatus proper, and

Fig'. 8 is a sectional view ol Fig.2.

on the 1ine S-S 9 is a fragmentary plan detail 0l a means for re fers/ely turning the leaves.

ln all the iio'ures the same references relier to seine par s.

'the music stand is shown of the common type, comprising a stancnion 1 on three 'leet 2 and carrying a table 3 'for the music hook Un the rear side e'j the table the mechanical leat turner 5 is attached and be operated by the loot o'l" the perhy means of a pedal 6, connected the horizontal VL' 7 te one ol the @nchion feet 2 and connected to the apatus hy means orn a cord 80. he upper edge or' each leal of the music l es fl, which is to he turned over inechanicallr, provided with a little hook 9 some thin and stil"T material such us .neet metal, card board or the like, which hoek cour-rises a tongue 9 projectino horizontally a id parallel to the leal e e and crossing a narrow slot- 10 in the said edge. 'like hoek 9 an he attached directly to the leal proper by means o1 small barbs 11 drawn through tue paper and clinched on vg1 rear side f lerect' or in any other conent way. lt is also advantageous to ap- A the hooks 9 and the slots 1G upon narrow strips 12 of paper, which are attached to the leaves along' the upper enge thereof by means et glue or the like, hy which device toe leaves are. saved trom being injured by the cuts i0 as well as thel harias 11. Such as 12 armoured with the l aolcs 9 then he kept iu store hj; f-i dealers and sold ready 'for u purchaser neel meisten the glued :ruf-s und spil the leaves oi'thc" nusic books. Fig'. lui-trates such an urn'ioured and Aglued strip.

'lle turning' apparatus proper comprises a screw-threaded nieinller 13, the tln'cads oi which have a rather large pitch such a; known from drills or the like. @n the upper portion 1lot the memher 13 tl e pitch et the threads is inlinite, so that the threads on this portion act merely as a `guide tor a nut 15, mounted upon the screw 13 and provided with a downwardly directed strap 1G ot a double bent wire or the like. The screw member 13 is carried in a collar 1? by a base plate 1S, which is attached to the rear side ot the table 3. rlhe lower end et the screw member 13 rests upon an apron 19 projecting from the base plate 18 and forining a thrust bearing for themeinber 13. The nut 15 is provided with a downwardly projectingl portion 20 with a trunnion 21, upon which is piroted a lever 22. A spi-ral spring 113 encircles the screw member 13 and is disposed between the nut 15 and the projection 19 so as to keep the nut yieldingly in its upper position illustrated in Figs. 2 and 7.

The lower arm of the lever 22 is tapered so as to form an inclined plane V23, which cooperates with a stud or a roller 21, proiectingv from the base plate 18. The upper arm of the .lever is forked so as to forni two lingers and 22 for the purpose delscribed below, and a clock spring 25 around the fulfcrum of the lever 22 tends to keep the lever ncri'nally in such a position, that the ta pei-ed` end portion rests against the stud or roller 2-1 such as shown in Fie'. 2.

Another lever is pivotally mounted ou the base plate 1S by means ofy a stud 27, and by the influence of a spring 28, which is supported by a stud 29 on the base plate 18, is kept normally in the position shown in Fig. 2. lVhen the nut 15 is lowered to the position illustrated in F ig. t, a projection 29" on the nut 15 cooperates with the lower arm 26 of the lever 26 so as to push the upper arm of said lever against the action of the spring 28 to the rightaccording to Fig'. f1 for the purpose described below.

. The upper end 13 of the screw member 13 carries a sleeve 30 with an axial slot 31', and within said sleeve there is slidably mounted a turning armV 32, which projects horizontally along the hook provided upper edges of the leaves ofthe music book 4 when in position on the table 3. The turning arm 32 on the end portion within the sleeve. 30 is provided with a linger 33, which projects through the slot 31 and serves for several purposes. One of these purposes is to keep the turning arm 32 in proper position within the sleeve 30, so that the turning arm is prevented from rotation around its axis, and another purpose is to limit the sliding amplitudes of the turning arm within said sleeve.

The free end 3-1 of the turning arm 32 is bent downwards at right angle to the turning arm proper, and the uttermost end 35 of said end portion is bent outwardly to form a hook which extends from the table 3, when the rod 32 is in its normal initial position as illustrated'in Figs. 2 and 7. At some distance from the double bent end portion 311, 35 the turning arm 32 is provided with another hook shaped member 36, 37 of mainly the same shape as the double bent portion 34, 35, but with the-hooked end 37 directed oppositely to the hooked end 35.

The described apparatus operates as follows.

`When playing from the notes appearing on the leaf of the music bookv 1 ust being opened the pedal 6 is left untouched and thereby held in its upper position as shown in Fig. 1 by the influence of the spring 113 and the cord 80. 1n this position the turning arm 32 remains in the position illusthe member 13, which consequently remains 'Y stationary, but the said descending motion of the lever 22 causes the inclined plane 23 to slide along' the stud or roller 2-1, and by means thereo'tl said lever 22 swings on its pivot- 21 to the position shown in Fig. 3. By this motion thelinger 22 coacts with the linger and by means thereof pushes the turning arm to the right in Fig. 2 or the position illustrated in Fig. 3. As a result the hooked end 34.- is positioned below the hook tongue 9', so that, when the downward motion ofthe nut 15 is continued by a further depression of the pedal 6, the nut 15 is caused to cooperate with the operative portion of the threads of the member 13, whereby said screw member is caused to revolve, bringing` with it the sleeve 30 and the turning arm 32, said arm catching the leaf ot the music book al. by the hook 9, 9 and brings said leaf to be turned as illustrated in two stages by Figs. 5 and 6 respectively, the arrows in said figures showing the moving direction of the turning arm In the position shown in Fig. 6 the leaf in question falls down into its reversed position by its own gravity, whereby the hooked end 31 of the turning arm passes by freely through the'slot 10.

is soon as the leaf has been reversed, the pedal 6 is released, and the spring 113 pushes the nut 15 upwards li'liting the pedal 6 into its initial position and` causing' as well the turning arm 32 to be swung back into the position of Fig. 2, whereby the lever 22 is released from the stud or roller 24, so 'that the clock spring 25 is able to swing back the lever 22, whereby its linger 22 releases the linger 33, and the finger 22 comes into contact with the end 32 of the turning arm 32 pushing said rod back to the initial position shown in Fig. 2 ready for turning the ext leaf.

Sometimes it happens, that some notes already played must be repeated, and if such notes appear on a leaf already turned over, said leaf must be reversed. Such an operation also can be performed by means of the present apparatus. For this purpose all the leaves of the music book 1 or at least those of them, which must be able to be reversed,

are provided with a further hook 109, 109 of the very same appearance as the hook 9, 9 but applied in a reversed position as shown in Figs. 2-t5 and 9. rlfhese hooks also must be provided with a slot 110 of the same type as the slot lO and they can be applied either directly on the leaves of the music book l or on the strip l2. rlhe lioolis 109, 109 are provided to cooperate with the hook member 56, 37 on the turning arm 32, which' occurs, when the nut l5 by aid of the pedal 6 is pushed downwards so far, that the projection comes in cooperation with the lever arm 2G', whereby the lerer 26 is caused to swing around its fulcrum E? as shown in Fig. Ll. T hen the upper end of the lever arm 26 contacts with the end 3L of the rod 32 or with a linger 32 thereupon, causing the rod 3Q, to be pushed to the right in accordance with Fig. l to such an extent, that the hook 36, 37 is positioned beloiv the hoolr tongue 109. The pedal G is released, so that the turning arm 32 can be sivung back into its initial position in Fig. 2, the turning arm 82 bringing the leaf of the music book 4l With it back, so that the notes on its proper sidewvill appear once again for the performer.

I rEhe small hooks 35 and 37 respectively have for their objects to prevent the hook 'tongue 109 respectively to slip down from the grasp of the hook 34, 36 respectively.

It is evident, that the constructive performance of the various parts can be designed in a plurality of forms Without exceeding the scope of this invention, and I do not Want to limit myself exactly to the design shown in the drawings and here described in detail. Such variations, however, can easily be understood by every one skilled in the artl` and therefore they need not be described or illustrated.

`What i claim is:

l. ln a music leaf turner, in combination, hooks on the leaves, a hoolt shaped turning arm provided to coact With said hooks, a screw threaded member carrying said turning arm, an axially movable nut cooperating with said screw threaded member so as to revolve said member, a double armed lever pivotable around a fulcrum and connected with said nut, the one end of said lever formed as an inclined plano, a stationary member coacting with said inclined plane so as to swing the lever around its fulcrum, the other of said lever coacting with the turning arm so as to slide the saine transversely of the axis of the screw threaded member, and means operable by the legof the performer for imparting axial movement to the nut to effect operation of the turning arm.

ln a music leaf turner, in combination, hooks on the leaves, a hoolr shaped turning arm provided to coaet with said hoolis, means to bring the turning arm in coaction with said hooks, means to revolve the turn ing arm so as to turn over a leaf, means to slide said turning arm transversely to the revolving axis of the same, other hooks on the leaves directed reversely with respect to the first mentioned hooks, another hook on the turning arm provided to cooperate with said reversely directed leaf hooks and means to move the turning arm so as to bring its last mentioned hook to coact with -said reversely arranged leaf hook for the purpose to reverse a previously turned leaf.

3. ln a music leaf turner, hoolrs at the upper edges of the leaves, said edges of the leaves having slots crossed by the hooks, a Soren7 threaded member journalled parallel to the turning edge of the leaves, a nut slidable along the screv7 threaded member so as to revolve same, a spring tending to keep said nut in its upper position, pedal operated means to cause said nut to descend against the spring action, a turning arm mounted on the upper end of said screw threaded member, a hook at the end of said turning arm provided to coact with said hoolrs on theleaves, a lever provided to descend together With the nut, an inclined plane on the one end of said lever, a stationary member coaeting with the inclined plane so as to push the turning arm into coaction with said leaf hoolrs when said nut descends, and to push said turning arm in the opposite direction when the nut ascends, and means to automatically bring said turning arm back into its initial position.

in testimony whereof I have hereunto affixed my signature.

AXEL JULiUs TUNER.

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