AN IMPROVED DIURNAL REFLECTOR.
Year: 1852

page_text: LETTERS PATENT to Charles Troupeau, of Paris, in the Empire of
France, for the Invention of "AN IMPROVED DIURNAL REFLECTOR.'
PROVISIONAL SPECIFICATION left by the said Charles Troupeau
at the Office of the Commissioners of Patents, with his Petition,
on the 8th November 1852.
I, CHARLES TROUPEAU, of Paris, do hereby declare the nature of the
said Invention for "AN IMPROVED DIURNAL REFLECTOR" to be as
follows:-
My improved reflector consists of a polished metallic mirror, throwing
out the most luminous rays. I use, preferably, a sheet of silvered or
tinned copper, which is fixed on wood, sheet iron, or on any other
suitable substance, and placed in a frame so that a pane or a sheet of
glass may be introduced, thus preserving the reflector from the injuries
of the atmosphere; or it may be coated with a transparent enamel.
The sheet thus prepared is then exposed to the light, according to
the requirements of the place. It should be inclined from 40 to 50

page_text: <degrees, and the numerous rays striking on it spread and radiate in all
the places that it may be deemed necessary to light. The best reflec-
tors would incontestably be silvered glass, were it not that the quick-
silver becomes damaged by the slightest damp; moreover the fragility
of glass, and the dearness of its price. render it too expensive for com-
I will give no detail of the shape of the reflector, nor of
that of its iron work; they naturally depend on the requirements of
the place. The metallic sheet may be undulated, striated, or what
is termed "gaufré" in French, instead of having its surface perfectly
smooth, light then being better reflected than with a perfectly smooth
surface. The metallic sheet may be covered with nails having the
shape of lozenges, these multiplying the reflecting surfaces; and the
whole may be covered by a sheet of glass sliding in two side grooves
fixed on the edge of the reflector and turned over, or in any other
suitable manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Troupeau in the Great Seal Patent Office
on the 7th May 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
CHARLES TROUPEAU, of Paris, in the Empire of France, send greeting.
WHEREAS Hor most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of November, in the
year of our Lord One thousand eight hundred and fifty-two, in the
sixteenth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said Charles Troupeau, Her special
licence that I, the said Charles Troupeau, my executors, administra-
tors, and assigns, or such others as T, the said Charles Troupeau, my
executors, administrators, and assigns, should at any time agree with.
and no others, from time to time and tall times during the term
therein expressed, should and lawfully might make, use, excreise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention of "AN IMPROVED
DIURNAL REFLECTOR," upon the condition (amongst others) that T.

page_text: the said Charles Troupeau, by an instrument in writing under
my hand and seal, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Troupeau, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, that is to say:
My reflector consists of a metallic or glass mirror. I employ in
preference sheets of copper, silvered or covered with a thin sheet of
silver. I fix it on wood or any other suitable substance, and place it
in a suitable frame in which there are grooves, to insert a sheet of
glass, to protect the silver or silvering or the polished metal from being
tarnished by the atmosphere; or the polished sheets of metal may be
covered with a transparent enamel adhering to it. Thus prepared this
reflector is placed in such manner as to catch the rays of light, and
throw them into the dark place which it is desired to render light.
The shape of the reflector, as well as the mode of attaching it, are
necessarily varied, according to the nature of the place where it is to be
set or fixed, The surface of the polished metal may be undulated in
such manner as to spread the reflected light more; thus the undu-
lations may be made in the shape of straight furrows, or inclined
furrows, or of a great variety of other shapes, resembling a shell, or the
rays of the sun. The metallic sheet being placed on wood carved in the
shape of the furrows or rays gives it great solidity and beauty.
In witness whereof, I, the said Charles Troupeau, have hereunto
set my hand and seal, this Seventh day of May, in the year of
our Lord One thousand eight hundred and fifty-three.
זז.
זזומתזAT .
CH. TROU
TROULEAU.
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