Improvements in Apparatus for Turning Over the Leaves of Music or other Books.
Year: 1895

page_text: Date of Application, 10th May, 1895-Accepted, 15th June, 1895
COMPLETE SPECIFICATION.
Improvements in Apparatus for Turning Over the Leaves of Music
or other Books.
I, FRIEDRICH MULLER of 23 Gr. Inschgraben, Frankfurt aM. in the
German Empire, Merchant, do hereby declare the nature of this invention and in
what manner the saine 18 to be performed, to be particularly described and
ascertained in and by the following statement -
This invention relates to apparatus for turning over the leaves of music oi
other books and consists in an improved construction of said apparatus and parts
thereof.
On the drawing appended hereunto,
Fig. 1 shows a front view partly in section and Fig. 2 a side view of the improved
apparatus,
Figs 3, 4 and 5 shewing details and
Fig. 6 the developed surface of the slotted tube hereinafter described.
In carrying out my invention I arrange a number of horizontal aims a turning
freely on a tube b by means of eyes at their ends as shown by Fig. 6, but separated
and held in a vertical direction by plates or prongs projecting from a block Z
attached to the frame. The aims are bent up at their free ends at a right angle
to different heights, each lower arm being turned up for a shorter length than the
one above it, and carry fixed to them descending wires a which are pushed between
the different leaves one after another so that on turning the aims a round b
Successively a leaf is turned over each time On the diawing one of such wires
only 18 shown attached to the lowest arm, the others being omitted to show how
the vertical parts of the levers a are ranged one behind the other.
The essential novel part of my invention consists in the arrangement of the
tube 6 and the sliding spindle with finger d. The tube is shit from the top
with a stepped helical slot as shewn on the Figs. 1 and 2 and on the developed
s face of the tube represented by Fig. 3, the houzoutal parts of the slot
extending half round the tube and the length of the vortical steps being equal to
the difference in the lengths of two successive vertical arms a. The finger à fixed
in the spindle e passes outwards though the slot. The tube is guided in three
bearings e, f, and g of the frame of the apparatus and can tuin freely in them, and
19 held longitudinally by means of a pin h. By moving the finger d downwards
from step to step of the slot in the manner hereinafter set forth, it is successively
brought behind the vertical part of each aim a so that when turned to the left by
180 degrees it carries each time that one of the aims behind which it happens to
be, along with it.
The turning of spindle c and finger d 18 effected by means of a driver or bush.
upon which a band pulley is fixed by means of a square on the driver and-a nut k.
The spindle c can slide longitudinally in this driver but 18 constrained to turn with
it by a set screw screwed into the driver entering a slot A or bearing against
a flat on the spindle, or by a key or feather or equivalent ordinary means.
The
driver is turned by means of a cord fixed to the band pulley and passing over
suitable guide pulleys, by 180 degrees from the night to the left, the movement
being limited by a stop l, and is turned back by means of a spring m fixed at one
end of the square on the driver and at the othei cud to a case it fixed or formed on
the frame as shewn by Fig. 3 When turned from right to left, the finger d takes
the tube and one of the aims a with it, while when the finger is turned back by

page_text: the
sping, the tube b remaius in its position being held by a brake o' attached to
a spring o or an equivalent brake. In consequence the finger d when turned back
to the left 16 placed above one of the vertical slots in the tube and descends by the
weight of the spindle upon the next horizontal step of the slot and is placed behind
the next shorter arm a, so that when turned again to the left by pulling the cord,
it carries this arm round and turns another leaf over.
By turning the tube in the reverse manner by meaus of the finger d and
lifting the latter by hand in the vertical steps of the slot the finger can be
returned to its highest position and the apparatus made ready for repeated use.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is.
1. The general arrangement of leaf turning apparatus or combination of the
parts thereof substantially as heretubefore described and illustrated by the
drawings.
2. In apparatus for turning over the leaves of music and other books the use
and arrangement of a tube with a stopped helical slot in combination with a
spindle sliding and turmug in said tube and carrying a finger projecting through
said slot, a brake acting on said tube and means for turning the sliding spindle
forwards and backwards for half a revolution, substantially as herembefore
described and illustrated by the drawings.
Dated the 9th day of Mar 1905
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.