US2407572A - Music leaf turner - Google Patents

Description

Sept. 10, 1946. c. w. Moss 2,407,572

MUSIC LEAF TURNER Filed June 8, 1945 2 Sheets-Sheet 1 IN V EN TOR.

' Cum/s W. Moss.

. armlwgx Sept 1m, 1946. c w oss 2 407 572 MUS IC LEAF TURNER Filed June 8, 1945' 2 Sheets-Sheet 2 IN V EN TOR.

Cum/s W. Moss.

MM- M ATTOPNEX Patented Sept. 10, 1946 UNlTED STATES PATENT QFFHCE.

4 Claims.

The leaf turner of my invention is of the kind that is to be actuated by a foot pedal from which a cable or other connecting means extend to the respective parts of the mechanism, adapted to turn sheets of music.

The purpose of my invention is to provide a light, compact device which can be easily applied to a conventional music stand.

Another object of my invention is to make my device simple in construction and economical to make, so that it can be turned out in quantity at a low cost.

I shall now describe my improvement with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of a music stand with sheets of music thereon, the view disclosing the location of my music leaf turner on said stand.

Fig. 2 is a plan view of a bracket to be affixed to the music stand and adapted to support essential parts of my turner.

Fig. 3 is a side elevation of said bracket.

Fig. 4 is a perspective: view, partly exploded for better illustration, of the mechanism of turner, with a View of a leaf holding clamp.

Fig. 5 is a perspective view, partly broken off, of the same mechanism, shown from a different angle.

6 is the bottom view of a holder which houses the mechanism of my turner.

Fig. 7 is an enlarged side elevation of elements forming a part of the mechanism of my turner.

Fig. 8 is a top elevation of the same mechanism, the top plate of the holder being removed. or a better View.

Fig. 9 is a side elevation of a leaf clamp and means to support it.

Fig. 10 is an end elevation of the clam-13 and supporting means shown in Fig. 9.

Similar numerals refer to similar parts throughout the several views.

The position of my turner with respect to a music stand is shown in Fig. 1 where the stand it supports a music sheet rack H and where my turning mechanism is identified by numeral l2. The mechanism is adapted to be actuated by a pedal device It, connected with mechanism l2 by means of a cable enclosed in a sheath 13. The mechanism is contained in a holder !9, mounted on a bracket l5. Said bracket has: a flat shank it provided with ears Hia, said shank being adapted to be fastened to a central upright member 58 of rack I I. This is done by means of cross bands [1, said member 58 being sandwiched between the shank and the bands, which are L,-

afiixed to ears 16a by screws IS.

The main part of the mechanism; of my leaf turner is contained in a holder I!) which includes a back wall 20 abutting the bracket 15, a horizontal top 26 and a horizontal base 26a, spaced therefrom. Rotatably mounted on back wall 23 by means of a pin 22, is a segment of a crown wheel, which hereinafter shall be briefly referred to as a crown wheel. The crown wheel is provided at a point close to its outer periphery with a loop 23, the loop serving as a means of attachment to a flexible cable 2-; passing downwardly through aperture in base The cable, enclosed by sheath I3, extends to a pedal device it, as mentioned above. This responds to pressure applied by foot, transmitting a downward pull on cable fi l. Mounted on the above mentioned pin 22 is a spool 23. A spring 2%, coiled thereon, is affixed at one end to the rim of the crown wheel 2!, while the other end 3!} bears against the upright surface of base 23a, to yieldingly resist the rotation of the wheel in response to the pull of cable 2 The teeth of crown wheel 2;! are meshed with rungs of pinion 33, the shaft 3 of which is journalled in the top it of holder i9. The said top is omitted from views shown in 4, 5 and. 8, for clearer display of parts of the mechanism disclosed therein.

The drum-like member 35 of pinion is provided with a pair of parallel arms 33, disposed radially with respect to said member. Pivotally supported by the arms by means of a pin id, is a claw 3? extending downwardly and including at its upper end a lug 39. A coil spring 38, disposed betweeen the body of member 35 said lug, causes the lower end of the claw to bear inwardly towards the axis of the pinion. At the lower end, the pinion is journalled in an annular member G2 on top of a plate ll, to which said annular memher is integrally connected. The plate has a outline of a cam of a spiral eccentric formation and includes a radially disposed contact face 5 for engagement with claw 3'5. The plate is capable of being rotated around its axis on the surface of a similar cam-like plate 5i, provided with a radial contact face 52. This is best shown in Fig. 8.

A shaft t? extends from the center of the annular member $32, downwardly through plates i 1, 5i and base 25 of holder it. The shaft is disclosed in Figs. 5, 6 and '7. At its upper end, the shaft is held securely within said annular member i2 by means of a screw i l. At its lower end the shaft supports a rod Mi, which extends radially from the shaft and supports a leaf clamp ll.

The lower plate 5i includes an annular hub jcurnalied in base Elia of holder as shown in Fig. 6, and supports another rod carrying at its outer end another leaf clamp d'i. It must be pointed out that the contact face in the rotary plate ti is somewhat more remote from the axis of the plate than the similar contact face on the lower plate 5i. As a result of that, when claw 3'! bears against the contact face 45 in the upper plate, it cannot reach the contact face of the lower plate. In other words, when the bearing faces of the respective plates are aligned, that is, when they are substantially one above the other, the claw will engage the [ace of the upper plate but not that of the lower plate. However, when the upper plate had been swung around its axis by means of said claw and the claw had been returned to its original position, said claw, inclined inwardly at its lower end by means of spring 38, will engage the contact face of the lower plate and thus wil1 serve as a means to impart a rotary motion thereto.

As already pointed out, each rod, that is, rod 45 and supports a leaf clamp 4'5, the latter being suspended from a conveyor 58, including rollers d9 riding on the respective rod. The con-- veyor and the clamp t? are loosely connected by a r ember fill. The clamp, which is normally dis, need in the plane of the conveyor, is capable of being turned horizontally at an angle to the plane of said conveyor.

I shall now describe the operation of my leai turner. Assuming that a book of music is placed on rack ll of stand it and is open for reading by a musician, and that one or two leaves will have to be turned in the course of said reading, a clamp on rod 453 is aflixed to one leaf and another clamp on red 54 is affixed to another leaf, in order of pages. When it is desired to tic-e first page, the pedal device i is deeffects a pull on cable 24, actuating the crown wheel 2i against the tension of spring The pinion. 33 driven by the crown wheel is made to turn around its axis, whereby the claw mounted from arms on member 35 of said pinion engages the contact face of the upper cam plate, causing it to swing around its axis to about 180 degrees from its original position. As shaft 13 extending downwardly through base 26a of holder it, rotates with said upper plate and as clamp 42, affixed to a leaf in the music book, is carried by a rod extending radially from said shaft, the rotation of the plate serves to turn over leaf. This time the next leaf may be similarly turned by again depressing the pedal device 24. Each time when the claw has swung around the respective plate, it is made to return automatically by said coil spring 29, acting upon crow wheel 2! and by means thereof upon pinion 33.

If the operation of turning of said leaf is to be re eated, the leaves with clamps attached to them may be turned back manually to their original position.

It will be seen that the turner does not have to be limited to two leaves, but that it may be made to include three or larger number of superimposed plates each having a contact face for a claw, but each of said faces being in succession from top down a little closer to the axis of the pinion so that the claw will successively engage the respective faces one by one from top down, thus causing the rotation of rods controlling the respective leaves of a music book.

It will be understood that some changes may be made in the construction of my leaf turner without deviating from the inventive principle disclosed herein.

What I. therefore, wish to claim is as follows:

1. A leaf turner of the kind described, comprising, a plurality of rotary, cam-shaped plates,

aligned axially, each having a radial contact face but each succeeding face, from top down, being closer to the common axis of rotation than the preceding face, each plate being connected to a radially disposed rod supporting at it end a clamp for attachment to a leaf of a music book, a rotary member axially aligned above said plates but remaining in a fixed relation longitudinally to said axis of rotation, a downwardly extending claw pivotally mounted in said member, said claw being adapted to engage the contact face of each of the plates, successively from top down, and gear means responsive to a pull of a cable to apply said claw to the respective contact face to swing the respective plate around its axis.

2. A leaf turner of the kind described, comprising a plurality of cam-like plates disposed parallel to each other and adapted to rotate individually around a common axis, each plate having a radially disposed contact face, but each succeeding face from top down being closer to said common axis than the face of the plate above, an axially disposed pinion above the uppermost plate, arm extending radially from the base of the pinion, a downwardly extending claw pivotally nted in said arm, spring means urging the lower end of the claw inwardly into engagement with the face of the respective plate, successively from top down, to turn the respective plate around its axis to the extent approximating 3.86 degrees, a rod affixed to each plate and extending therefrom in a plane spaced therefrom, a leaf clamp pivotaily suspended from the outer end of each rod, gear means to impart a rotary motion to the pinion and pull cable means to actuate said gear means.

3. A leaf turning device of the kind described comprising a plurality of horizontally disposed cam-like plates adapted to rotate around a common axis, each plate having on the marginal portion thereof a radially disposed contact face but each succeeding face, from top down, being closer to the common axis or rotation than the face above, a claw pivotally mounted above the top plate for rotation around said axis, spring means causing the claw to bear inwardly from its pivoted connection towards said axis to engage successively each of the radial faces to rotate the respective plate, a rod affixed to each plate and extending radially therefrom, means on each rod to be ailixed to a music leaf, means to impart a rotary motion to said claw in one direction, and spring means to return the claw back to its initial position.

4. A music leaf turner including a casing, a vertical shaft journalled therein, a rotary member mounted on the upper end of the shaft, a claw pivoted in said member and extending downwardly thereof, spring means urging the claw towards the shaft, a plurality of cam-like plates mounted thereon. for rotation around said shaft, each of the plates having on its outer margin means for engagement with said claw, said means being progressively closer to the shaft, with each plate following the top plate, downwardly cable means to cause the claw to rotate each plate in succession, spring means to return the claw to its initial position upon rotation of each plate and a rod extending from each plate radially, for connection with an individual music leaf.

CURTIS W. MOSS.

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