Patent GB-190825951-A (GB)
Title: An Improved Apparatus for Turning the Leaves of Music and the like.
Inventor: LYTTLETON WESTCOTE RAYMOND
Filed: 1908-12-01
Granted: 1909-07-29
Abstract: 25,951. Lyttleton, W. R. Dec. 1. Leaf - turners. - A leaf-turner comprises a series of arms 60, 61, 62, 63 pivoted in a slotted bracket 68 within a slotted casing 47 and having at their pivoted ends slotted disks 71 and projections 73, which are adapted to be engaged in succession by the toe-piece 58 of a "driver" 57 mounted on a spindle 54 concentric with the spindle on which the arms are mounted. The spindle 54 is pressed upwards by a spring 50 so that the toe-piece 58 of the driver passes through the slots of the disks and engages each of the projections 73 in succession. In order to put the driver out of engagement with the lowest turning-arm, it may be engaged with a notch in the bracket 68. Thedriver 57 is actuated by a spring - returned pulley 45 rotated by a cord 42. When the apparatus is employed in connexion with a piano, the cord 42 passes round a guidepulley 44 and through a guide-tube 43, and is attached to the lower end of a spring-controlled rod 38 contained within a tubular standard 7. To the rod 38 is attached a cord 31 which passes over pulleys 28, 29 mounted on a cross-piece on the standard 7. The cord passes down within the piano casing and is attached to a bell-crank lever, Fig. 4, having arms 33, 35 connected by a stopped joint and provided with a knee-pad 34 adjustable along the arm 35 of the lever. The standard 7 is secured to the piano by a bracket 26, and is attached at its lower end to a frame 1, 2, 3, 4 by means of a bracket 8. A plate 10 pivoted to the bracket 8 carries a vertical pin 9 and has a spring adapted to engage beneath the base 1 of the frame. In order to hold the top of the book, a sleeve 17 sliding on the standard and engaged therewith by a spring 21 carries a finger 16 which falls between two wires 19, 20, and is adjusted by an arm 18. When employed on a music stand, the upper part of the apparatus is dispensed with and the cord 42 passes over the pulley 44 to a pedal. In order to allow a page to be turned back for repetition, the arrangement shown in Fig. 8 may be employed in connexion with one or more of the turning-arms. A pawl 77 is pivoted beneath the arm 63, which is pivoted eccentrically in the guide 47, and is formed with a shoulder 79 adapted to be engaged by the toe-piece 58 of the driver and a tail-piece 82 which may be engaged by a recess 83 in the driver, a shoulder 80 which engages a pin 81, a projection 90, and a hook 84. A slide 86, adapted to be moved round the interior of the guide 47 by a handle 88, has a cam 85 adapted to be engaged by the projection 90 when moved into the position shown in full lines. When it is desired to repeat a sheet of music, the slide 86 is moved so as to cause the engagement of the projection 90 with the cam 86 when the arm 63 is turned, with the result that the tail-piece 82 is moved inwards and is engaged by the toe-piece 58 on its return stroke, so that the arm 63 is brought back. At the same time, the hook 84 engages the cam 85, and returns the slide to the position shown in dotted lines.