US228600A - And john m - Google Patents

Description

W. 8: J. M. BURKART.

Leaf-Turner.

N 228,600. Patented June 8,1880.

- WITNESSES I... II!" VIIIIIIIIIIIIIIIIII/ qTTORNEYS.

N. PETERS, PHOTOlITHDGRAPHER. WASHINGTON. DV 0.

UNITED STATES PATENT OFFICE.

WILLIAM BURKART, OF SMITHVILLE, INDIANA, AND JOHN M. BURKART, OF CANTON, KANSAS.

LEAF-TU RN ER.

SPECIFICATION forming part of Letters Patent No. 228,600, dated June 8, 1880.

Application filed January 6, 1.880.

.To all whom it may concern:

Be it known that we, WILLIAM BURKART, of Smithville, in the county of Monroe and State of Indiana, ,and JOHN M. BURKART, of Canton, in the county of McPherson and State of Kansas, have invented a new and Improved Music-Leaf Turner, of which the following is a specification.

The object of our invention is to provide an attachment for organs, pianos, and other simi lar musical instruments, by which the leaves of music can be turned without the necessity of removing the hands from the key-board.

The invention. consists of a plate to be applied to the music-rest, fixed fingers to hold the covers, open movable fingers to grasp the leaves, levers for operating the movable fingers, cords running from said levers to a kneelever under the keyboard, and tension devices for regulating the movement of the levers, all arranged so that by pressing against the knee-lever the leaves of music are successively turned.

In the accompanying drawings, Figure l is a perspective view of an organ-case with our music-leaf turner applied to it. Fig. 2 is a bottom view of the organ key-board, showing the kneelever and the cords connecting the knee-lever with the finger-levers. Fig. 3 is a sectional detail of the end of the finger-levers to which the cords are attached. Fig. 4 is a perspective view of one of the fingers and its lever; and Figs. 5 and 6 are views of a device used in connection with the music-leaf turner when applied to a piano.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A is the organcase. B is the key-board, and O is the musicrest. D is the plate of the music-leaf turner, which is intended to be attached to the musicrest 0. Said rest is provided with a ledge, a, to support the music-book E, as shown.

Below ledge a, midway ot' the length of plate D, are two projections, b 11, between which are pivoted grooved pulleys c c, and to these pulleys are attached the power ends of levers d (1, each of which, with its grooved pulley, is adapted to turn independently of the other. Through pulleys c c are made segmental holes 6, for the passage of the cords which run to the knee-lever. On levers d d are slides f, from which project upward at right angles'double fingers By the slide attachment of the fingers g with levers d d the double fingers g, which are designed to clasp the leaves of the music, can be moved back and forth on said levers, so that they can be made to clasp the leaves at points where they will least obscure the notes, and said slides also permit the fingers to be adjusted in position to the width of the leaves of music.

To plate I), below the ledge a, and at each end of said ledge, is attached one end of the fingers 7b, the opposite ends whereof project upward at right angles. Fingers h are fixed, and they are designed to hold the book-covers open, and also the first leaf of the music to be played.

Levers (l (1 and fingers g are adapted to turn freely on their fulcrums in the grooved pulleys c c, from right to left and left to right, as may be desired, and these movements are produced in the following way:

Through segmental hole a in pulley c is run a cord, '13, one 'end, j, whereof is run around said pulley, thence, parallel to the music-rest O,

to a pulley, 7., near the back edge of the end I of the case A. Around said pulley kit is carried to the front over another pulley, l; thence it is carried down through a hole in the keyboard under cleat m, and from there it is carried under the key-board 13, and attached to an elastic cord, m, and elastic cord m is c011- nected by a cord, m with a pin, a, inserted in the adjacent side of the knee-lever F, which is fiileruu ied under the key-board in position to be easily reached and operated by theknee of the performer,in the same manner as the lever of a knee-swell. The other end,j, of cord i is carried in the opposite direction to end P of the organ-case, where it is run over pulleys Z 1 thence down through the key-board un der a cleat, m and thence itis carried and attached directly to a pin, a, inserted in the knee-lever F on the side opposite pin n.

t is a second cord run through hole 0 of pulley 0. One end, 0, of said cord is run to tached to a pin, q, inserted in the adjacent side of the knee-lever F. The other end, 0, of cord 43 is carried to the end Z of the organcase, around pulleys 12 19 down through the key-board under cleat m", and it is then connected to one end of an elastic cord, m, which in turn is connected by a short cord, m with a pin, q, on the side of knee-lever F opposite pin q.

Knee-lever F is connected with one end of a spiral spring, G, the opposite end whereof is attached to the under side of key-board B.

Spring G serves to draw the knee-lever back against the stop H in the position it occupies in Fi s. 1 and 2, from whence it is moved to turn the leaves.

The operation of the invention is as follows: The book E is placed against plate D, with its lower edge resting on ledge (t, and being opened at the right place the fixed left-hand finger It is placed over the leaves at the coinmencement of the piece, or, if opened at the beginning, then over the cover, so as to hold the left sides of the book down, while the right-hand fixed linger h is placed over the right-hand cover, or over the leaves of music that follow the piece to be played. The positions of the fixed fingers are shown in Fig. 1. The leaves of the music to be turned are then placed between the double fingers g in the order that they are to be turned-that is to say, the first leaf to be turned is placed between fingers g of lever d, and the next leaf is placed between fingers of lever d. The cord t, connecting lever d with the knee-lever F, is shorter than cord 1?, connecting lever d with said lever. Now, when the first leaf is to be turned, the performer presses with his knee against lever F, so as to throw it in the direction of the arrow. The lever F draws on the end j of cord i, and said cord, acting on pulley 0, turns said pulley, and with it lever (I, fingers g, and the first leaf over from right to left, and thereby exposes a new page of the music. When the next leaf is to be turned the lever F is pressed farther in the direction of the arrow, the elastic cord m yields, allowing the lever to move, and the end 0 of cord 2" is drawn, thereby acting .on pulley c, lever d, fingers g, and the next leaf is turned from right to left. l/Vhen the lever F is relieved of pressure spring G draws it back, and the end 0 of cord 2" is caused to turn pulley e and lever (1 back from left to right, throwing the last leaf turned back first. Then, through end j, cord i is caused to throw lever d, and with it the first leaf turned back, from left to right. The purpose of the elastic cord m, attached to the end j of cord 2', is to permit the lever F to move farther after turning overthe first leaf,

cord-t" has to have an elastic cord, at, coir nected with it, so that it can yield and permit the lever F to move back snfliciently far to act on the end j of cord 2'.

For every leaf to be turned a separate fin gerlever, grooved pulley, and cord is required, and there must be elastic pieces inserted in all the cords except the one which is intended to turn the last leaf.

By means of the pins a a q q the tension of the cords is regulated, so that when the lever F is moved the cords are successively acted uponby the lever in the order of their connection with the fin ger-levers. Thus the first cord connected with the lever that turns the first leaf should be drawn taut, so that the knee-lever F will act directly on the said cord. The next cord should be slackened sufficiently to allow lever F to mox e far enough to turn the first leaf before acting on the sec ond cord, and so on, the several cords being slackened just enough to allow the lever to complete the turning of one leaf before acting on the next.

The cords which turn the leaves back should be slackened in the reverse order of those that turn the leaves forward.

lVhen the attachment is applied to a piano the cords are not run down through the keyboard, but a plate, H, is attached to the block at each end of the key-board, and on this plate is held a slide, 1', provided with a set-screw, s, for holding it in position.

011 the outer end of slide 1' are grooved pulleys. The cords are run from the pulleys to which the finger-levers are attached in both directions to the ends of thekey-board, thence down over the pulleys on plates 1' outside of the piano-case, and then down underneath the case, and thence their ends are carried to the knee-lever.

The slides r are thrown out sufficientl y far to allow the cords to clear the front of the case below the key-board.

When the piano is to be closed the cords are detached from the knee-lever and gathered up in the piano, and the slides 1' are pushed in far enough to allow the front of the case to go into its place.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. The combination of the fingers g, levers d d, pulleys o c, cords t t", and elastic cords m m, with a knee-lever, F, constructed and operating substantially as described.

2. The pins n a q q, combined with the cords t i, for regulating the tension of said cords, as specified.

WILLIAM BURKART. JOHN M. BURKART.

itnesses to signature of William Burkart:

D. O. SUTPHIN, Z. T. PARSONS.

l/Vitnesses to signature of John M. Burkart:

D. (J. LUsE, DAVID BITTER.

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