Year: 1888

page_text: A communication from OSOAR LANGE, Watchmaker, and WILHELM HELBIG, Gentleman,
of Dresden, in the German Empire, Manufacturers.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex, M.I.M.E.
do hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The present invention relates to an apparatus for turning the leaves of music and
other books and consists essentially in the mounting of the arms which turn the
leaves in combination with a peculiar mechanism for disengaging the said arms
which are under the influence of springs.
On a frame a which may be fastened to the Music stand by means of the screws b. b.
or otherwise are mounted a series of arms d (six being shown in the drawings) which
turn round the fixed spindle c. These arms à are each provided with two long pins e
on or against which are placed the several leaves to be turned. To the short ends of
the arms d are fastened springs or india-rubber bands f the other ends of which are
fastened to the frame a, while the long ends of the arms are under the influence of
the springs f fastened to the frame a (see fig. 2.)
These india rubber bands or springs f and springs fi tend to turn the arms d to the
left as they are bent when the arms are turned to the right. The india-rubber bands f
draw the short end of the arm and the springs f¹ press against the long end of
the arm.
When turned to the right the arms d are retained in the notches or grooves h of tho
plate by a slide 9. The outside of this slide g is provided with pins
one for each
arm d. Next to the slide g a second slide is suspended by the spring m and this
slide carries a pawl n which serves to draw the slide 9 down for a distance equal to
space between two of the pins k when the slide lis drawn down, for the purpose of
disengaging one of the leaf turning arms which then will be turned to the left under
the influence of the springs f,f'.

page_text: Instead of the springs ƒ¹ (fig. 2.), coiled springs ƒ2 (fig. 3.) may be fixed to the
spindle c and the long end of the arms d.
The operation of the apparatus is as follows:-When all the arms d are on the left,
the lowest is turned to the right until it enters its corresponding notch / in the plate i
and the slide g is then moved over it to retain it. To move the slide g upwards the
pawl n must be lowered, for the passage of the pin k, by pressing its arms on one
side. The last leaf to be turned is placed against the long pins e of this arm.
When the lowest arm is thus in position the next one is turned and so on until all
arms are in position.
When tho uppermost leaf is to be turned a pedal is pressed down which is connected
with the slide by a rod or a cord o. The slide is thus drawn down and the pawl n
engaging with one of the studs k and prevented from turning upwards by a suitablo
stop will draw the slide 9 down until the latter has disengaged the highest arm d
which is turned to the left under the influence of the springs ff carrying with it the
leaf resting on its pins e.
When the pressure on the pedal ceases the slide is returned to its normal position
by the spring m the pawl n being movable downwards as far as the pin passing the
next stud and the slide lis again in position to draw down the slide g for the
purpose of disengaging the next arm d to turn the next leaf.
Having now particularly described and ascertained the nature of the said Inven-
tion, as communicated to me by my foreign correspondents, and in what manner the
same is to be performed, I declare that what I claim is :-
1. In an apparatus for turning the leaves of music or other books the leaf turning
arms d turning on the fixed spindle c the short ends of said arms being drawn by
springs or india-rubber bands while the long ends are being pressed by springs f
substantially as described and illustrated in the accompanying drawings.
2. In an apparatus for turning the leaves of music or other books the mechanism
for retaining and disengaging the leaf turning arms d consisting of the slide 9 which
retains the said arms and which is drawn down by its studs by means of the
pawl n of a slide 1 drawn down by the rod or cord o for the purpose of disengaging
one of the arms d after which operation the slide 7 returns to its normal position the
whole constructed and operating substantially in the manner described and illustrated
in the accompanying drawings.
:ני
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