Year: 1888

page_text: I, GEORG SCHMIDBAUER of Passau, in the kingdom of Bavaria and German
Empire, Engineer, 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 apparatus constructed according to these Improvements is intended for turning
over the leaves of music by the agency of a magnet or electromagnet.
In the accompanying drawings
:-
Fig. 3 shows the apparatus in front elevation.
Fig. 2 shows a plan seen from underneath.
Fig. 1 represents a section.
Fig. 4 shows the spring clamp r in elevation.
The roller b which is fitted with a projection c (Fig. 3) turns around the pin a
(figs. and 3).
To the projection c is hinged an arm d, on the outer end of which is arranged a
magnet e. The magnet attracts the metal plates f which are secured to the lower outer
corners of the leaves either by means of glue or by means of spring clamps or pins,
and turns together with arm d through a semicircle to the left, when d is actuated by
means of the cord g. One end of the cord g is wound upon a roller h which is firmly
connected to the roller b while the other end is passed over the rollers i and k and
secured to one of the pedals. As soon as the pedal is depressed, the cord g actuates
the roller and with it the roller b. The arm d which is secured to the projection c
of the roller 6 participates in this movement and takes the magnet with the attracted
leaf with it. On the left side of the plate l, which also serves as a support for the
book, a cam m is fastened which disengages the magnet e from the metal plate secured
to the leaf after each half revolution of the arm d which pivots round n. The small
metal plates on the leaves are shown dotted in Fig. 3.
A spring o which is in contact with a pin p on the arm d brings the latter into
its original position after the leaf has been turned over.
This return movement of the arm d is effected by an elastic cord which is partly
wound round the roller a and secured to the arm d. By depressing the pedal this
I Dries G621

page_text: cord is put under tension. As soon as the pressure on the pedal is released, the
arm d returns into its original position and the magnet is attached to the next leaf
and turns it over in the same manner.
The bar s arranged on the left side of the plate l prevents the leaves from following
the downward movement of the magnet when the latter is detached from the leaf.
If the leaves are not bound or secured together in any manner a vertical pin q is
inserted into the roller b. On this pin are arranged spring clamps (Figs. 3 and 4)
which turn freely round 9 and hold the single leaves on their upper and lower ends.
An electro-magnet is used in place of the ordinary magnet, when an electric current
either from a battery or a dynamo is available. The apparatus is in this case in all
other respects exactly the same as when an ordinary magnot is used.
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) In apparatus for turning over the leaves of music; the combination and
arrangement of a magnet or electro-magnet attached to an arm capable of being
moved through a semi-circle by means of a cord, magnetic plates secured to the
leaves of the music, and a cam for detaching the magnet from the leaf after it
has been turned; substantially as hereinbefore described and as illustrated by the
accompanying drawings.
(2) In apparatus for turning over the leaves of music; the construction arrange-
ment and combination of the vertical pin q inserted in the roller b, and the spring
clamps substantially as. and for the purpose hereinbefore described and as
illustrated by the accompanying drawings.
871 1
A D 1000
WILLIAM E. HEYS,
Agent for the Applicant.