AN IMPROVEMENT IN SHADES FOR LAMPS AND OTHER LIGHTS
Year: 1826

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, VALENTINE
BARTHOLOMEW, of Great Marlborough Street, in the Parish of Saint James,
Westminster, in the County of Middlesex, Gentleman, send greeting.
WHEREAS His most Excellent Majesty King George the Fourth, by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-first day of December, in the seventh year of His reign, did,
for Himself, His heirs and successors, give and grant unto me, the said Valentine
Bartholomew, His especial licence that I, the said Valentine Bartholomew,
my executors, administrators, and assigns, or such others as I, the said Valentine
Bartholomew, my executors, administrators, and 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 "AN IMPROVEMENT IN SHADES FOR LAMPS AND OTHER LIGHTS;"
in which said Letters Patent there is contained a proviso obliging me, the
said Valentine Bartholomew, by an instrument in writing under my hand and
seal, particularly to describe and ascertain the nature of my said Invention,
and in what manner the same is to be performed, and to cause the same to
be inrolled in His Majesty's High Court of Chancery within two calendar
months next and immediately after the date of the said recited Letters Patent,
as in and by the same, reference being thereunto had, will more fully and at
large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Valentine Bartholomew, do hereby declare that the nature of my said
Invention, and the manner in which the same is to be performed, is described
and ascertained as follows, that. is to say:-
My Invention consists in applying or affixing a ventilator over the chimney
or chimnies of Argand or other lamps, or the frame of other lights, and
attaching the said ventilator to a glass, paper, or other shade, with which I
surround such lamps or lights, and producing, by means of the current of
heated air passing through the leaves of the ventilator, a rotary motion of the
said shade, by which the various drawings and figures of any ornamental
design delineated or described on the said shade, or the various parts of any
model or form in which it may be thought proper to make it, may be alter-
nately exhibited or presented to the eye. The Drawings in the margin of
these Presents more particularly exhibit the precise nature of my Invention,
but I do not of course intend to confine myself to the exact mode therein
shewn of supporting or affixing the ventilator, as circumstances and experience
in the manufacture will doubtless offer various modifications or alterations in
the method of supporting or affixing the same, but I give them as an example
of the best means of carrying my Invention into effect that at present occur
to me. Figure 1 represents the section of the improved shade applied to an
Argand lamp with one burner; Figure 2 shews the improved shade applied
to a suspended Argand lamp; and Figure 3 is an exterior view of the shade
complete. The same letters refer to the same parts in each Figure. A, A, is
an iron or other suitable stand, resting on the rim or reservoir of a lamp, to
support an inverted metallic or other cone B and cylinder C, on which rests
the cup D, to receive the pivot E of the ventilator F, F, F, which cone and
cylinder in lamps of single burners are used to radiate or throw out the
current of heated air to the extremity of the ventilator. G, G, G, G, shews a
cross bar, by which the ventilator may be readily attached to the shade H, H.
In lamps of two or more burners, unless the said burners are placed very near
to each other, the cone B and cylinder C may be dispensed with, and in that
D
cup may be supported by a stem or staff rising from the centre
of the said lamp, equidistant from the said burners, or by any other suitable
means best adapted to the form and structure of the lamp to which it is
intended to be applied.
case the
"
In witness whereof, I, the said Valentine Bartholomew, have hereunto
set my hand and seal, the Twentieth day of February, in the year of
our Lord One thousand eight hundred and twenty-seven.
VALENTINE (L.S.) BARTHOLOMEW.

page_text: AND BE IT REMEMBERED, that on the same Twentieth day of
February, in the year above mentioned, the aforesaid Valentine Bartholomew
came before our Lord the King in His Chancery, and acknowledged the
Specification aforesaid, and all and every thing therein contained, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute in that case made and provided.
Inrolled the same Twentieth day of February, in the year above written.