A NEW AND IMPROVED METHOD AND APPARATUS APPLICABLE TO PIANOFORTES and Music Stands for Turning over the Leaves of Music
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Alexander Browne at the Office
of the Commissioners of Patents, with his Petition, on the
6th September 1875.-A communication from abroad by Emile
Henri Demaret, Pianoforte Manufacturer, of Paris, in the French
Republic.
I, ALEXANDER BROWNE, of the Firm of Browne and Company, Patent
Agents, of 5; Southampton Buildings, Holborn, in the County of
Middlesex, do hereby declare the nature of the said Invention for
"A NEW AND IMPROVED METHOD AND APPARATUS APPLICABLE TO PIANOFORTES
and Music Stands for Turning over the Leaves of Music," a communication
from abroad by Emile Henri Demaret, Pianoforte Manufacturer, of Paris,
in the French Republic, to be as follows:
-
This Invention relates to a new and improved method and apparatus,
applicable to pianofortes and music stands for turning over the leaves of
music.
The apparatus is fitted on to an ordinary music or book stand, and is
so constructed that by means of a pedal suitably connected thereto the
leaves of music or books may be easily turned over quickly or slowly
without using the hand. This apparatus, which is placed at the lower
part of the music rest, is composed of a series of lovers furnished at

page_text: one end with clips, between which the leaves are previously placed and
held, the said levers are taken hold of by a driver which brings them
round one after the other, and thus turns over the leaves held by the
olips.
In order to explain this Invention more fully reference is had to the
illustrative Shects of Drawings accompanying this Specification, and to
the numeral figures and letters of reference marked thereon.
Figure 1 (Sheet 1)' is a front view of an ordinary music rest furnished
with the improved apparatus for turning over the leaves of music.
Figure 2 (Sheet 2) is a side view of the same.
Figure 3 (Sheet 3) is an under side view of the apparatus; this Figure
shows clearly the different mechanical parts which act on the levers for
turning over the leaves.
Figure 4 (Sheet 3) is a longitudinal end and under side view of the
smallest lever furnished with a clip.
Figure 5 (Sheet 3) is a. longitudinal end and under side view of the
largest lever furnished with a clip.
Figure 6 (Sheet 2) is a plan, end view, and longitudinal section of the
driver which acts on the levers.
Figure 7 (Sheet.3) is a portion of the music rest, which shows the
spring hook for preventing the levers going back to their original
position.
Figure 8 (Sheet 3) is a front and side view of 'the transmitting parts
of the apparatus.
In the above named Figures similar letters are used to denote corrc-
sponding parts.
a is a music rest hinged at 6 to a panel c of a musical instrument or
piece of furniture; d, levers or arms mounted on the same axis e; these
levers are made of thin steel blades, and are furnished at their free ends
with clips f, into which the leaves of music to be turned over are
previously placed.;-9,-pinion_revolving loosely_on_the_axis_e_but_fixed to
a plate h, to which is fixed a plate i in connection with the driver j.
k, notch provided in the driver j for taking hold of the levers d one after
the other for turning over the leaves; l, mortice which serves to limit
the distance travelled by the driver j; m, coiled spring, one end of which
is fixed to the plate h and the other to a hook n on the plate i;
o, movable hook screwed to the driver ; for laying the leaf flat when
'

page_text: By the
turned over; p, projection or inclined plane which when the driver j
turns round is depressed and serves to lift up the hook o which carries
the levers d to the end of their course; q, projecting pieces on the levers d,
each of which are made larger than the one before, so as to form steps
when all the levers are one against the other, thus allowing the driver j
to take only one lever at a time; r is a toothed quadrant which
transmits motion to the pinion g; this quadrant is keyed on the
spindles supported by the plate t and socket u; v, lever fixed on the
shafts which passes, through a slot x cut out of the panel c.
above arrangement the transmitting parts are placed out of sight;
y, springs which prevent the levers getting out of position before they
are taken up by the driver j; %, spring for keeping the levers d in the
position to which they are brought by the driver j; w, lever having its
fulcrum at 1; 2, plate screwed to the panel c; 3, rod connecting the
lever w with the lever v; this rod has two pins 4 which fit into holes
provided for that purpose in the lug 5 and lever v. The lug 5 is
movable on the lever w so as to allow the free motion of the rod 3;
6, string for connecting the lever wo to a pedal for giving motion to the
apparatus.
MODE OF OPERATION.
The manner by which leaves of music may be turned over by means
of the above apparatus is as follows:-Pressure is applied to a pedal
provided for that purpose, but not shown in the Drawings, which is
connected with the lever to by the string 6; the said lever w being
depressed acts by the rod 3 on the lever v, by which action the shaft s
will rotate and with it the quadrant r, which transmits its motion to the
pinion g carrying the plates h and i and driver j; the driver j in going
round takes with it by means of the notch k and projecting pieces q, one
of the levers & with the leaf held by one of the blades f.
When the leaves are not bound together or are fly leaves they must
be fixed on the rest a by means of two small clips.
If required the transmitting parts of the apparatus may be so
arranged that the leaves can be turned back without the necessity of
using the hand.