US1248520A - Music-leaf turner. - Google Patents

Description

F. MARGERT v MUSIC LEAF TURNER. APPLICATION manna. 19.1916.

- Patented Dec. 4, 1917..

2 SHEE TSSHEET. 1.

F. MARGERT.

MUSIC LE'AF TURNER. APPLICATION FILED APR. 19. 1510.

Patented D60. 4, 1917..

2 SHEETS-SHEET 2 m. w M

FRANKMARGERT, OF MILWAUKEE, WISCONSIN.

MUSIC-LEAF TURNER.

Specification of Letters Patent.

Patented Dec. 4, 1917.

Application filed April 19, 1916. Serial No. 92,158.

To all whom it may concern: v

Be it known that I, FRANK MARGERT, a citizen of the United States, and residentof Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Music -Leaf Turners, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

This invention has for its object to provide a music leaf turner which will becapable of turning the leaves of sheet music, or a book, either to the right or to the left.

Another object of the invention is to provide a music leaf turner which will be independent of motor springs for swinging the leaf turning arms.

Another object of the invention is to provide a music leaf turner which will be simple and inexpensive in its construction and which will be strong and durable in its op eration, easily controlled and quiet in its action.

With the above and other objects in view the invention consists in the music leaf turner as herein claimed and all equivalents.

Referring to the accompanying drawings, in which like characters of reference indicate the same parts in the different views,

Figure 1 is a front view of a music stand provided with a music leaf turner constructed in accordance with this invention;

Fig. 2 is a side view thereof;

Fig. 3 is a front view of the main portion thereof with the casing sectioned;

Fig. 4 is a plan view thereof with the cover of the casing removed;

Fig. 5 is an enlarged detail view of the parts of the anchor pawl and the series of ratchet leaves, only one set of ratchet teeth being shown to avoid confusion;

Fig. 6 is a perspective view of one of the ratchet leaves; I

Fig. 7 is a detail sectional plan view of the spring for returning the anchor pawl to its normal position after being moved in either direction; and,

Fig. 8 is a sectional view on theplane of line 88 of Fig. 4.

In these drawings 10 indicates the base of a music stand, and 11 the easel or broad fiat surface against which the music sheets are spread as usual. Theledge 12, against which the music leaves abut, is slidable on the easel to accommodate it to the length of the music leaves in order that the upper edges of the music leaves may be engaged by clamps on the leaf turnii'ig arms, to be later described. At the upper edge of the easel 11 is secured a base plate 13 carrying a cylindrical casing 1a in the center of which is a shaft 15 journaled in a bracket 16 removably secured to the base plate. This shaft forms a pivotal support for a number of ratchetleaves 17 there being six of'them in the construction shown, though the number may be more or less. These ratchet leaves 17 are of the shape shown in Fig. 6, thoughtheir dimensions necessarily vary in order that they may nest together and be pivotally mounted on the shaft. As shown in this figure, the ratchet leaf consists of a plate of sheet metal with its inner edge bent outwardly at right angles thereto to form a flange 18, and the ends of such flange bent over at right'angles to the flange to form parallel pivot cars 19 with openings at their ends which fit around the shaft 15. The length of the flange 18 and the length of the pivot arms 19 vary with the successive ratchet leaves in order that they may nest together in the manner shown in Fig. 3, and theparts are so positioned on the base plate 13 that the ratchet leaves 17 travel through a semi-circular opening in the bottom of the casing. Each ratchet leaf at its outer lower portion has a pivotal connection 20 for one of the leaf turning arms 21 which may thus be swung upwardly but which is limited in its downward swing to a horizontal position by the engagement thereof with a stop lug 21 bent out from the pivotal connection. Spring clips 22 are carried by the leaf turning arms 21 to engage the upper edges of the music leaves so that swinging movements of the arms 21 will be imparted to the music leaves, and each ratchet leaf 1? furthermore has an upper ratchet tooth 23 and a lower ratchet tooth 24:, the former turned in one direction and the latter turned in the opposite direction.

The upper ratchet teeth 23 of the successive leaves are progressively longer, while the lower ratchet teeth 24 are progressively shorter. Thus, when the. leaves are assem bled in any one position they present two serie of stepped ratchet teeth with their stepped arrangement inclining in opposite directions. A sleeve 25 is loosely mounted on the extension of shaft 15 and is provided with oppositely extending arms 26 with spring pressed hooks or dogs 27 at their ends to form an anchor pawl. The spring pressed hooks or dogs 27 are desirably limited in their pivotal movements on. the arms 26 by a pin and slot connection 28 between them, as shown in Fig. 5. As seen in Fig. 3 the hooks 27 are not in the same plane, but the one 011 the left is in the plane of the series of ratchet teeth 23, while the one on the right is in the plane of the series of ratchet teeth 2 1. The sleeve 25 carries a pinion 29 which meshes with a segmental gear 30. A partition 31 extends across the rear portion of the casing where it is seated on screw posts 32 and to it is riveted an upstanding post 33 upon which the segmental gear 30 is rotatably mounted. The segmental gear 30 has a normal central neutral position in which it is held by spring action and from which it may be turned in either direction. Such spring action is produced by a coil spring 3% surrounding the hub of the segmental gear 30 with its oppositely extending ends engaging studs 35 projecting downwardly from diametrically opposite parts of the segmental gear wheel 30. These oppositely extending ends of the spring 34L also engage stationary pins 36 projeoting upwardly from the partition 31 on opposite sides of the post 33, as shown in Figs. 7 and 8, and when the segmental gear 30 is moved in either direction one of the studs 35 moves away from the end of the spring, leaving it held by the pin 36, while the other stud 35 carries the other end of the spring away from its pin 36, as shown by dotted lines in Fig. 7. In this manner the segmental gear is returned to its neutral or normal central position by the spring 34L after it has been moved in either direction.

Projecting from the upper part of the segmental gear 30 is a flange 37 having looped or rounded ends and openings there through near the loops through which are passed the knotted ends of a pair of cords or cables 38, the knots thereof becoming seated behind the loops. These cords or cables are passed out through the back of the casing over a curved lip 39 and extend down to oppositely projecting arms 10 on a rock shaft 41 which is journaled on a bearing strip 42 of the base, a double treadle 43 on said rock shaft 41 is adapted to be engaged by the foot of the musician to turn the rock shaft in one direction or the other, and thus pull upon one cable or the other to turn the segmental gear 30 to the right or left as the case may be.

In operation the pressure of the foot on the left side of the treadle exerts a pull on the left cable causing the segmental gear-30 to turn in a clockwise direction, as viewed from above. This ives an anti-clockwise movement to the pinlon 29 to cause the left arm 26 to swing forwardly and bring its hook 27 into engagement with the ratchet tooth 23 of the foremost ratchet leaf 17, causing said ratchet leaf to swing and turn the front leaf of music from left to right, the anchor pawl carrying the parts for a greater portion of their are of travel which is completed by the momentum of the parts and the action of gravity owing to the inclined position of the easel. The release of the treadle permits the spring 34: to restore parts to their normal positions, the end of the dog 27 beyond the hook portion thereof being rounded to permit it to ride past the ratchet teeth and be in position to engage the end ratchet tooth upon the next operation of the treadle.

The direction of the operation as described happens to be such as will turn the leaves backwardly, but is the operation which will be best understood from the drawings. For turning the leaves forwardly from right to left the right side of the treadle is depressed, causing all parts to op erate in the opposite direction to that previously described and bringing the right arm 26 forwardly so that the right hook 27 by engaging the ratchet tooth 24 of the front ratchet leaf will swing it around to turn the leaf as before described. Thus the leaves may be turned in either direction, and because of the stepped arrangement of the ratchet teeth 23 and 2 1, only the front leaf will be turned in either direction of operation. The turning movement of the leaves may be made as quickly or as slowly as de sired, depending upon the character of the pressure on the treadle, as such pressure constitutes the motive power and the spring only serves to restore the parts to their normal position after the operation.

The two sets of ratchet teeth 23 and 24; form advancing and returning ratchets respectively, and the anchor pawl constitutes a common means for operating upon either ratchet according to whether it is swung to the right or the left of its normal position. This makes the device simple in its construction and inexpensive to manufacture though it is eflicient in its operation and not liable to get out of order.

The term anchor pawl is used with its ordinary significance as being a pair of rocking arms each having engagement with successive ratchet teeth or the like when the arms are rocked to a position for that purpose.

The casing is desirably provided with a cover as through which the post 33 and the shaft 15 project, the latter preferably having a nut 45 threaded thereon to hold the cover in place.

The music leaf turner of this invention is of few simple parts inexpensive to manufacture and strong and durable and eflicient in use.

What I claim as new and desire to secure by Letters Patent is:

l. A music leaf turner, comprising a series of leaf members pivotally mounted on a common axis, two sets of engaging teeth on the leaf members, one set in ascending stepped relation and the other set in descending stepped relation to form advancing and returning ratchets, a rotatably mounted member, a pair of spring pressed pawls thereon for engaging the respective sets of engaging teeth, means for turning said member in either direction, means for returning said member to a neutral position, and means for connecting the leaf members to the music leaves.

2. In a music leaf turner, a series of leaf members pivotally mounted on a common axis, two sets of stepped engaging teeth formed thereon, the engaging teeth of one set being progressively longer and the engagingteeth of the other set being progressively shorter to form advancing and re turning ratchets, a suitably mounted anchor pawl having a pawl member for each set of engaging teeth adapted to engage said teeth respectively with the successive movements thereof, a pinion carried by the anchor pawl, a gear wheel meshing with the pinion, spring means for moving the gear wheel to a neutral position, means for turning the gear wheel in either direction away from its neutral position, and means for connecting the leaf members to the music leaves.

3. In a music leaf turner, a series of leaf members pivotally mounted on a common axis, two sets of stepped engaging teeth formed thereon, the engaging teeth of one set being progressively longer and the en gaging teeth of the other set being progressively shorter, a suitably mounted anchor pawl having a pawl member for each set of engaging teeth adapted to engage said teeth respectively with the successive movements thereof, a pinion carried by the anchor pawl, a gear wheel meshing with the pinion, a coil spring surrounding the hub of the gear wheel, stationary stops normally engaged by both ends of the spring, projections on the gear wheel for engaging said ends of the spring whereby the spring acts to move the gear wheel to a neutral position, means for turning the gear wheel away from its neutral position in either direction, and means for connecting the leaf members to the music leaves.

4. In a music leaf turner, a stand, a series of leaf members pivotally mounted thereon on a common axis, two sets of stepped engaging teeth formed thereon, the engaging teeth of one set being progressively longer to form an advancing ratchet and the engaging teeth of the other set being progressively shorter to form a returning ratchet through the series of leaf members, a suitably mounted anchor pawl having a pawl member for each set of engaging teeth adapted to engage said teeth respectively with the successive movements thereof, a pinion carried by the anchor pawl, a gear wheel meshing with the pinion, spring means for moving the gear wheel to a normal position, a pair of cables connected with the gear wheel, and a double treadle at the base of the stand to which the cables are connected, and means for connecting the leaf members to the music leaves.

5. In a music leaf turner, a stand provided with an inclined easel, a music rest adjustably mounted thereon, a casing secured to the easel, a fixed shaft passin through the casing, a series of leaf mem%ers pivotally mounted on the shaft, leaf turning arms pivotally mounted on the leaf members, spring clips thereon for engaging the music leaves, two sets of engaging teeth formed on the series of leaf members, the two sets being in stepped relation and in opposite order to form advancing and returning ratchets, an anchor pawl pivotally mounted on the shaft and provided with a pair of spring pressed pawl members, one for each set of engaging teeth and adapted to engage said teeth consecutively with the successive movements of the anchor pawl, a pinion on the anchor pawl, a gear wheel meshing with the pinion, a spring for moving the gear wheel to a neutral position, a pair of cables connected with the gear wheel on opposite sides of its center and passing out of the casing, a shaft mounted at the base of the stand, oppositely extending arms on the shaft to which the cables are connected, and a right and left treadle on the shaft.

In testimony whereof I aflix my signature, in presence of a witness.

FRANK MARGERT.

Witness:

R. S. C. CALDWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Estonian, Washington, D. G.

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