CERTAIN IMPROVEMENTS IN CIZANDO SHOW Drimpo OUND LIGHTING GLASSES, SHADES, AND SMOKE PLATES USED IN GAS AND OTHER LIGHTING
Year: 1854

page_text: LETTERS PATENT to Ernest Radigon and Raimond Gabriel de Grimou-
ville, both of Paris, in the Empire of France, and of 16, Castle Street,
Holborn, London, for the Invention of "CERTAIN IMPROVEMENTS IN
CIZANDO
SHOW Drimpo
OUND LIGHTING"
PROVISIONAL SPECIFICATION left by the said Ernest Radigon and
Raimond Gabriel de Grimouville at the Office of the Commissioners of
Patents, with their Petition, on the 23rd May 1854.
We, ERNEST RADICON and RAIMOND GABRIEL DE GRIMOUVILLE, both of
Paris, in the Empire of France, and of 16, Castle Street, Holborn, London,
do hereby declare the nature of the said Invention for "CERTAIN IMPROVEMENTS
IN GLASSES, SHADES, AND SMOKE PLATES USED IN GAS AND OTHER LIGHTING," to be
as follows, & consists of slitting the said articles longitudinally, so as to allow
for the expansion and contraction to which the vitreous matter is subject.
The slit or fissure may be made during the process of manufacturing or
blowing the said articles, or may be cut subsequently in the glass with a
diamond, or by other suitable means.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Ernest Radigon and Raimond Gabriel de Grimouville in the
Great Seal Patent Office on the 22nd November 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ERNEST
RADIGON and RAIMOND GABRIEL DE GRIMouville, both of Paris, in the Empire
of France, and of 16, Castle Street, Holborn (City), London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of May, in the year of our Lord
One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Ernest Radigon and Raimond Gabriel de Grimouville, Her special
licence that we, the said Ernest Radigond & Raimond Gabriel de Grimou-
ville, our executors, administrators, and assigns, or such others as we, the said
Ernest Radigon & Raimond Gabriel de Grimouville, our executors, adminis-
trators, and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter, during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for CERTAIN IMPROVEMENTS IN GLASSES, SHADES, AND SMOKE PLATES
USED IN GAS AND OTHER LIGHTING," upon the condition (amongst others) that
we, the said Ernest Radigon & Raimond Gabriel de Grimouville, by an
instrument in writing under our hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner the saine
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 we, the said Ernest Radigon & Raimond Gabriel
de Grimouville, 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 :-
The object of our improvements is to render less frequent-the-breakage_of_
glasses, shades, and smoke-consuming plates used for gas and other lights.
This we effect by slitting the above articles longitudinally, or in any other suit-
able direction, so as to allow for the expansion and contraction to which vitreous
matter is subject upon heating and cooling. The slit or fissure may be made
during the process of manufacturing or blowing the above articles, or else it
may be subsequently cut in the glass.
Fig. 1 of the annexed Drawings shews an elevation of a glass or chimney

page_text: intended for an argand burner. a, b, is the slit, which being supposed to be
made entirely with a diamond is represented with a ragged edge. The slit
may also be produced by any other suitable mechanical or other means; thus,
when it is desired to produce a smooth edge, the slit may be made during the
manufacture of the glass by any means applicable to separating glass in a soft
state. Figs. 2 & 3 shew the application of this system, which we call the
ante-fissure principle, to "omnibus" and elbow glasses or chimneys of oil or
other lamps. Fig. 4 is a fumivorous or smoke-consuming plate, having the
preserving slit or fissure a, b. The ante-fissure principle is also applicable to
any other glasses, shades, and crystals exposed to the heat of the flames of
gas, oil, tar oil, schist, or other lamps. The fissures shewn on the Drawing in
firm lines a, b, are straight, and lic in a plane which passes through the axis of
the glass or smoke plate; but they may also deviate in any convenient manner
from the straight direction, or from the axial plane; they may, for instance,
be slightly inclined to the axis, as is shewn in dotted lines in the Figures of the
accompanying Drawing.
Having thus described the nature of our Invention, and the manner in
which the same is or may be carried into effect, we wish it to be distinctly
understood that what we claim as novel, and being secured to us by the herein-
before in part recited Letters Patent, is,-
The application of a longitudinal or other suitable slit or fissure to glasses,
chimneys, shades, and smoke plates used in lighting apparatus of any descrip-
tion, for the purpose of allowing said glasses, &, &, to expand and contract
without breakage.
In witness whereof, we, the said Ernest Radigon and Raimond Gabriel
de Grimouville, have hereunto set our hands and seals, this 20th day
of November, in the year of our Lord 1854.
ERNEST RADICON.
R. DE GRIMOUVILLE.
(L.B.)
(L.S.)
ERNEST RADICON.
(L.B.)
R. DE GRIMOUVILLE. (L.S.)