IMPROVEMENTS IN LAMPS
Year: 1852

page_text: LETTERS PATENT to Samuel Sedgwick, of Piccadilly, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN
LAMPS."
Sealed the 14th January 1853, and dated the 18th November 1852.
PROVISIONAL SPECIFICATION left by the said Samuel Sedgwick
at the Office of the Commissioners of Patents, with bis Petition,
on the 13th November 1852.
I, SAMUEL SEDGWICK, of Piccadilly, in the County of Middlesex,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN LAMPS to be as follows:-
This Invention is chiefly applicable to lamps to be used in India,
where the punker is employed, though it is also applicable in other
cases where the air is liable to be agitated; and consists in sur-
rounding or inclosing what is called the cup, and the lower tube,
and causing the air supplied to the exterior and interior of the
flame to be conducted from a distance to the inclosed space or
chamber, and thence to pass partly into the cup and up the burner

page_text: SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said Samuel Sedgwick in the Great Seal
Patent Office, on the 13th May 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
SAMUEL SEDGWICK, of Piccadilly, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth 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
successors, give and grant unto me, the said Samuel Sedgwick, Her
special licence that I, the said Samuel Sedgwick, my executors,
administrators, and assigns, or such others as I, the said Samuel
Sedgwick, my executors, administrators, 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
night make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN LAMPS," upon the condition
(amongst others) that I, the said Samuel Sedgwick, by an instru-
ment 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 Samuel Sedgwick, 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 thereof (that is to say):
This Invention is chiefly applicable to lamps to be used in India,
where the punker is employed, though it is also applicable in other

page_text: ΠΟ
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And in order that my said Invention may be more fully under-
stood, I will proceed to describe the means of construction pursued
by me.
DESCRIPTION OF THE DRAWING,
which represents a section of a pedestal lamp constructed according
to my Invention, the stem of which is hollow and is open at the
bottom, as is shown, for the passage of air, which passes up the
hollow stem, as is indicated by the arrows; and when it arrives at
the
cup a, part of the air rises up outside the burner tube, and part
passes into the cup, and thence up through the burner tube; hence
all the air for supporting combustion is from a distance, the air in
the immediate vicinity of the burner being excluded from the
burner. At the upper part of the glass shade, I apply a metal cap b,
perforated with numerous holes, and also several short tubular
openings or passages for the heated air and products of combustion.
By the arrangement or construction of lamps above described, the
effects of currents of air, in a room or place in which a lamp is
burned, are neutralized.
Other forms of lainps, such as bracket lamps, may be arranged
in a similar manner, and have the air brought from a distance by
enclosing the cup and burner tube, and supplying the air exteriorily
and interiorily to the burners from a distance, by having the stems
hollow, and open at a distance from the burners, for the passage of
air through the stems into the inclosed chambers surrounding the
cups and the burner tubes.
Having thus described the nature of my Invention, and the
manner of performing the same, I would have it understood that I

page_text: do not confine myself to the details herein shown and described, so
long as the peculiar character of my Invention be retained; but
what I claim is the mode herein described of constructing lamps.
In witness whereof, I, the said Samuel Sedgwick, have hereunto
set my hand and seal, this Thirteenth day of May, in the
year of our Lord One thousand eight hundred and fifty-three.
Witness,
FRED. HARRIS.
SAMUEL SEDGWICK. (L.S.)