Improvements in Reflectors for Piano Illumination.
Year: 1892

page_text: Date of Application, 22rd Dec.. 1892-Accepted, 11th Feb., 1893
COMPLETE SPECIFICATION.
Improvements in Reflectors for Piano Illumination.
We JULIUS FIEDLER, Engineer, of 23 Englischestrasse, Charlottenburg, and
CARL ULRICH, Manufacturer, of 28 Englischestrasse, Charlottenburg, both in the
Empire of Germany, 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:-
This invention relates to reflecting apparatus for piano illumination and has for
its object to light up the music sheet whilst the player sits in the shade, and also
to enable the player to observe the position of the mouth during singing practice.
In the accompanying sheet of illustrative drawings
Figure 1 represents a side elevation of an apparatus constructed according to this
invention and
Figure 2 is a plan of the same.
b
A plate resting on india rubber feet a has at one side an upright carrying and
guide plate c for the reflector holder, comprising a tube provided with a non-
circular bore, and the adjustable rod e fitting therein. The tube d is fixed to rotate
about the point f in the plate c and engages, by means of a screw bolt g, through
a circular shaped sloth in this plate. A screw i serves for fixing in any desired
position. The sliding rod e which may be fixed by a second screw k is connected
at its free end by a pivot joint with the reflector 7. A third screw m serves to fix
the reflector in respect of the rod e.
When required to be used the base plate is placed centrally on the top of the
instrument and any desired lamp put thereon. The tube d, rod e, and reflector
are rotated or adjusted until the music sheet n is well lit. The rays of light fall
from the source of illumination o on to the reflector 1, and from that on to the
music sheet n, whilst the player remains in the shade.
In Figure 1 for example two rays of light o, o' are shown, with the reflected
rays o, o at equal angles. The single parts b, c d,l of this adjustable reflector may
be produced in castings with ornamental reliefs.
For singing practice two further small mirrors p, 9 are combined with the large
mirrors and serve for the observation of the positions of the mouth of the singer..
For this purpose arms rare fastened under the reflector between which the
mirrors p, 9 are rotatably arranged on a common axis s and may be fixed by a
screw t. The mirror surfaces are turned toward the singer. One mirror p, which
may be replaced by a prism, receives the rays of light, either direct from the
source of illumination o, or from the first mentioned mirror 1 by reflection, and
throws them on to the singers mouth; thence they reach the second mirror q which
on its part makes visible the image received of the position of the mouth.
Figure 1 for example a reflected ray of light o o³ o oo is in this way shown.
In
The mirrors p, q can also be separated from each other, the one p being rotatably
fixed to the reffector and the other g to the base plate b, in which case the latter.
would hang over the music holder. The method shown on the drawing is however
preferable, as this shows the image of the mouth at a reduced distance and conse-
quently more clearly.
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. An adjustable reflector for piano illumination consisting of a base plate b
taking any desired lamp and of an extending arm de rotatably connected thereto
so that it may be firmly fixed. and which carries the suitable reflector / also.

page_text: connected so that it may be rotated or fixed, so arranged that the latter after
suitable adjustment lights up the music and key board, leaving the player in the
shade substantially as described.
2. In connection with the reflector described in Claim 1 the use of two further
mirrors p, q turned towards the singer, and of which the one p throws the rays
received direct from the source of light o, or those reflected from the first mentioned
mirror l, on to the mouth of the singer, letting them thence reach the third
mirror g in which the singer can then observe the position of the mouth, substan-
tially as described.
3. The arrangement and construction of reflectors for piano illumination, substan-
tially as described with reference to the drawings.
Dated this 22nd day of December 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.