IMPROVEMENTS IN LAMPS
Year: 1853

page_text: LETTERS PATENT to Joseph Hart Mortimer, of 1, Chester Place,
Old Kent Road, in the County of Surrey, for the Invention of
"IMPROVEMENTS IN LAMPS."
Sealed the 13th October 1853, and dated the 17th August 1858.
PROVISIONAL SPECIFICATION left by the said Joseph Hart Mor-
timer at the Oflice of the Commissioners of Patents, with his
Petition, on the 17th August 1853.
I, JOSEPH HART MORTIMER, of 1, Chester Place, Old Kent Road,
in the County of Surrey, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN LAMPS " to be as follows:-
The object of this Invention is to construct a lamp more suitable
for burning tallow or fatty matters than those heretofore made for such
purposes, and consists of applying a small cup or vessel around the
burner within the general receptacle for the tallow or fat, and com-
bining therewith a hollow or dished instrument to direct the air to the
flame, and to throw the heat down to the fat below, leaving the space
between the under surface of this instrument and the tallow or fat
below it as open as may be, by which the lamp may be readily lighted,
and by reason of the comparatively small quantity of tallow or fat in
S

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Hart Mortimer in the Great Seal Patent
Office, on the 17th February 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
JOSEPH HART MORTIMER, of 1, Chester Place, Old Kent Road, in the
County of Surrey, sond greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of August, in the
year of our Lord One thousand eight hundred and fifty-three, in the
seventeenth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Joseph Hart Mortimer, Her
special licence that I, the said Joseph Hart Mortimer, my executors,
administrators, and assigns, or such others as I, the said Joseph Hart
Mortimer, 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 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
"IMPROVEMENTS IN LAMPS," upon the condition (amongst others) that T,
the said Joseph Hart Mortimer, 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 per-
formed, 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 Joseph Eart Mortimer, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof (that is to say):
The object of this Invention is to construct a lamp more suitable for
burning tallow or fatty matters than those heretofore made for such

page_text: purposes, and consists of applying a small cup or vessel around the
burner within the general receptacle for the tallow or fat, and com-
bining therewith a hollow or dished instrument to direct the air to the
flame and throw the heat down to the fat below, leaving the space
between the under surface of this instrument and the tallow or fat
below it as open as may be, by which the lamp may be readily lighted,
and by reason of the comparatively small quantity of tallow or fat in
the cup the same becomes quickly melted, and a constant supply will
be obtained to the wick.
Having thus stated my Invention, and the manner of carrying the
same into operation, I will proceed to describe the accompanying
Drawing, and refer to the figures and letters marked thereon. The
letters in all instances indicate the same parts in each of the Figures.
cup
Figure 1, is a section of so much of a lamp having my Invention
applied thereto as will serve to show its peculiarities. Figure 3, is
another section of similar parts of a lamp, but having my Invention
applied somewhat differently to what is represented by Figure 1.
Figure 2, shows some of the parts separately. a, is the body of the
lamp; b, the air tube; c, the revolver; and d, the cup; e, is the dish
or hollow instrument to direct the air to the flame, and throw the
heat down to the fat in the cup d, below. The upper portion of the
d, is on a level with the upper portion of the body a, of the lamp.
The advantage gained by this form of lamp arc, that by the cup d,
passing down into the body of the lamp it becomes filled with the
tallow or fatty matter at the same time as the body of the lamp. The
fatty matter is to be poured in in a liquid state, and as that portion of
the fatty matter in the cup d, is not covered, it is subjected to con-
siderable heat refracted from the metallic cone e, by which arrangement
the lamp can be lighted withont material injury to the cotton, and
obviates the necessity of using hot water heaters or other such like
apparatus for effecting the same object. The dish or cone e, may be
fixed by screws, or, by being provided with holes for that purpose, it
may be dropped on to the pins f. f, attached to the gallery g, as shown.
In Figure 3, I have shewn the parts c, d, e, f, g, as separate and re-
movable from the body u, and air tube , which is in sone instances

page_text: the preferable manner of making those parts. By my Invention I, at
the same time, prevent the heat from being refracted on the whole
body of fat or other inatter contained in the lamp.
Having thus described my Invention, and the best means I am
acquainted with for carrying the same into practice, I wish it to be
understood that I do not intend to confine myself to the precise forms
or dimensions of any of the parts herein described, as the same may
be varied without departing from my Invention. But what I claim is,
the application of a small cup or vessel around the burner within the
general receptacle for the tallow or fat, and combining therewith a
hollow or dished instrument to direct the air to the flame, and throw
the heat down to the fat below, as herein described.
In witness whereof, I, the said Joseph Hart Mortimer, have
hereunto set my hand and seal, this Seventeenth day of
February, in the year of our Lord One thousand eight hundred
and fifty-four.
Witness,
FRED HARRIS.
JOSEPH HART MORTIMER. (L.S.)