CERTAIN IMPROVEMENTS IN REFLECTORS FOR LUMINARIES
Year: 1850

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JULES
FREDERICK MAILLARD DUMESTE, of the Sixth Divison of the Hotel National
des Invalides, at Paris, in the Republic of France, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-second day of
May (One thousand eight hundred and fifty), in the thirteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Jules Frederick Maillard Dumeste, my exors, adññors, and assigns, Her
especial license, full power, sole privilege and authority, that I, the said
Jules Frederick Maillard Dumeste, my exors, adiñors; and assigns, or sucli
others as I, the said Jules Frederick Maillard Dumeste, my exors, adñiors,
or assigns, should at any time agree with, and no others, from time to time
and at all times during the term of years therein expressed, should and
lawfully might make, use, exercise, and vend, within England, Wales, and the
Town of Berwick-upon-Tweed, my Invention of "CERTAIN IMPROVEMENTS IN
REFLECTORS FOR LUMINARIES;" in which said Letters Patent there is contained
a proviso that I, the said Jules Frederick Maillard Dumeste, shall cause a
particular description of the nature of my said Invention, and in what manner
the same is to be performed; by an instrument in writing under my hand and
seal, to be inrolled in Her Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said in part

page_text: recited Letters Patent, as in and by the same, reference being thereunto
had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, said Jules
Frederick Maillard Dumeste, do hereby declare the nature of my said Inven-
tion, and the manner in which the same is to be performed, are fully described
and ascertained in and by the following description thereof, reference being
had to the Drawing hereunto annexed, and to the figures and letters marked
thereon, that is to say:-
My Invention consists in obviating the shade in apparatus for illuminating,
and in multiplying the effect of light by means of corrugated glasses. The
same letters in the several Figures represent parts which are similar.
I construct the
Figure 1 is a vertical projection of a burner provided with the new reflector.
Figure 2 represents a horizontal section drawn through a plan passing from
A to B of Fignre 1, as seen when looking at the lower part of the reflector.
The improved reflector, as represented in this Drawing as being adjusted to
a gas burner a, having at its lower extremity a small jutting-out part 6 seen
in Figures 1 and 3. This jutting-out part b serves to receive a large ring
'or socket c jointed to a second ring d by means of three small arms or
supports e. One of the arms is elongated outside to enable it to support the
small rod f, which is strongly rivetted on the said rim e. Figure 3 shews
the two sockets c and d cut and placed on the burner; and Figures 4 and 5
shew their exterior, seen horizontally and in elevation.
sockets c and d, and the three small arms by which they are united, by casting
them together; but the second socket d must be made separately, and united
afterwards to the arm e by means of a rim or ring to enable it to be after-
wards joined to the second socket c. When these two sockets c and d are
properly adjusted to the burner, I adjust to the reflector or corrugated glass
socket g, represented in vertical section by Figure 6, and in plan by Figure 7.
I take care to cause the rod f to pass in the hole h of the reflector, which
has its edge corrugated upon one side, and may have its two sides corrugated
if required. The glass or chimney is placed upon the reflector g; that glass
is corrugated externally, but it may also be corrugated internally. It is main-
tained in its vertical position by the piece or holder k, which is represented
alone in a sectional elevation by Figure 8, and in plan by Figure 9. That
piece is provided with two projections i fitting into the top of the glass in
order to maintain it internally, the said glass being kept fast externally by
the part or nut t, through which the before-described rod passes, and to
which it is instantaneously fixed by means of the cramp screw m. By these
means the burner glass j is permanently fixed on the gas burner.

page_text: From what I have herein-before described it will be easily understood that
by my improved system I can construct reflectors of any form and dimensions,
and they can be applied to all kinds of gas burners, whatever be their form
and size. I must observe, however, that the mode of setting the reflector or
glass socket must vary according to the dimensions and the mode of con-
structing the burners. The same improvements can also be applied to the
construction of lamps of different kinds, by regulating the setting of the
reflectors and the currents of air according to the size and form of the burning
apparatus.
And having now described the nature of my said Invention, and the manner
in which the same is to be performed, I declare that I do not confine myself
to the precise details for constructing the improved apparatus herein-before
described, provided the general arrangement be similar to that laid down.
But what I do claim as my Invention and intended to be protected by the
aforesaid Letters Patent is,―
Firstly, the application of a corrugated glass socket or reflector for support-
ing the glass or chimney of gas burners, and their employment in conjunction,
for multiplying the effect of light as herein-before described, reference being
had to Figures 1, 4, 6, and 7 of the Drawings.
gas
Secondly, the mode of maintaining the glass or chimney of burners
in a vertical position as herein-before described, reference being made to
Figures 1, 6, 7, 8, and 9 of the Drawing.
In witness whereof, I, the said Jules Frederick Maillard Dumeste, have
hereunto set my hand and seal, this Eighteenth day of November, One
thousand eight hundred and fifty.
JULES FREDERIC (L.S.) MAILLARD DUMESTE.
Taken and acknowledged by Jules
Frederick Maillard Dumeste (party
hereto) at Paris, this 18th day of
November 1850. before me,

page_text: William Armand Gilbee, of 4, South Street, Finsbury, in the County of
Middlesex, Gentleman, maketh oath and saith, that he is acquainted with the
manner and character of the handwriting of Thomas Pickford, Her Britannic
Majesty's Consul at Paris, in the Republic of France. And this Deponent
further saith, that the signature "Thomas Pickford" set, subscribed, or
written in the margin of the Specification hereunto annexed marked A, and
dated the Eighteenth day of November instant, and purporting to be executed
by Jules Frederick Maillard Dumeste, of the 6th Division at the Hotel
National des Invalides at Paris, in the Republic of France, whereby it is
stated that the Specification was acknowledged by him, the said Jules
Frederick Maillard Dumeste, before the said Thomas Pickford, on the said
Eighteenth day of November, at Paris aforesaid, is of the proper hand-
writing of the said Thomas Pickford.
By Afft.
AND BE IT REMEMBERED, that on the oath of William Armand
Gilbee, the Specification aforesaid was enrolled word for word as above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Enrolled the Twenty-second day of November, in the year of our Lord
One thousand eight hundred and fifty.