IMPROVEMENTS IN MINERAL OIL LAMPS.
Year: 1860

page_text: LETTERS PATENT to James Robson, junior, of North Shields, in the County
of Northumberland, for the Invention of "IMPROVEMENTS IN MINERAL
OIL LAMPS.".
Sealed the 31st May 1861, and dated the 8th December 1860.
PROVISIONAL SPECIFICATION left by the said James Robson at the
Office of the Commissioners of Patents, with his Petition, on the
8th December 1860.
I, JAMES ROBSON, junior, of North Shields, in the County of Northum-
berland, do hereby declare the nature of my said Invention for "IMPROVE-
MENTS IN MINERAL OIL LAMPS," to be as follows:-
The object of my Invention is to prevent the frequent breakage of glass in.
the ordinary chimney of a mineral oil lamp, by substituting for the same a.
combination of metal and glass, whereby the glass is more removed from the.
flame, and rendered less liable to break.
My Invention consists in making a burner of the ordinary description used
for mineral oil lamps, but instead of the usual perforated gallery, I substitute
one of metal plate without openings or perforations, with a rim and screw of
the ordinary description to receive a glass globe or cylinder. To this gallery
I fix rods or pillars, upon which I support a chimney formed of a metallic
tube. The bottom of the chimney is bell-mouthed, notched to receive the

page_text: rods or pillars, and fixed a short distance over the flame, leaving open the
lower part around the flame from the bottom of the chimney to the gallery.
A few holes are made in the chimney nearly level with the top of the glass
globe or cylinder, to carry off any steam or gass that may be formed in' the
said globe or cylinder. A metal plate or rim with an inner flange is closely
fitted round the chimney, to slide up and down the same, and to rest on the
top of the globe or cylinder, and cover the space between the chimney and top
of the glass globe or cylinder. This plate or rim in some cases may be
fitted tightly to the top of the glass globe or cylinder, so as to secure the
metallic chimney without the rods or pillars.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Robson in the Great Seal Patent Office on the 6th
June 1861.
-TO-ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
ROBSON, junior, of North Shields, in the County of Northumberland, send-
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of December, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs.and successors, give and grant unto me, the said
James Robson, junior, Her special licence that 1, the said James Robson,
junior, my executors, administrators, and assigns, or such others as I, the
said James Robson, junior, 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 MINERAL OIL LAMPS," upon the condition (amongst others)
that I, the said James Robson, junior, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, 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 James Robson, junior, do hereby declare
tre nature of my said Invention, and in what manner the same is to be per-

page_text: formed, to be particularly described and ascertained in and by the following
statement:-
The object of my Invention is to prevent the frequent breaking of glass in-
the ordinary glass chimney of a mineral oil lamp by substituting for the same.
a combination of metal and glass, whereby the glass is more removed from the
flame, and rendered less liable to break.
:
In order that my Invention may be fully understood, I have hereunto:
annexed a Sheet of Drawings, with letters of reference marked thereon, and
corresponding with letters of reference in this Specification.
THE FOLLOWING IS A DESCRIPTION OF THE DRAWING.
The Drawing shows the lamp partly in section, and partly in elevation,-
and consists of a reservoir or oil vessel A, wick B, burner C, screw c, to
raise or lower the wick; perforated casing D for admission of air; perforated
plate E, for air. to pass through; dome F, with slot or hole f, for flame to
pass through; gallery G, to carry glass globe and legs of chimney; rim g,*
tightening screw g', metal chimney II; bell-mouth h; perforations h', for
emission of gas or vapour; metallic legs or pillars I, I, to support chimney;
glass globe K; metallic plate L, to cover space between globe and chimney;
flame, M.
The nature of my Invention consists in making a lamp with a reservoir or
oil vessel A, wick B, burner C, air casing D, and screw c for raising the
wick of the ordinary description used for burning mineral oil, but instead of
the usual perforated gallery, I substitute one of metal plate G without open-
ings or perforations, with a rim g, and tightening screw g¹ to receive a glass
globe K or cylinder. To this gallery I fix metallic rods or pillars I, I, upon
which I support the chimney H formed of a metallic tube. The bottom of the
chimney his bell-mouthed and notched to receive the legs or pillars I, I, and
fixed a short distance over the flame M, leaving open the lower part around
the flame, from the bottom of the chimney to the gallery, for the light to pass
through. A few holes h' are made in the chimney nearly level with the top
of the glass globe or cylinder, to carry off any steam or gass that may be formed
in the said globe or cylinder. A metal plate or rim L, with an inner flange 1,
is closely fitted round the chimney to slide up and down the same, and to rest
upon the top of the globe or cylinder, and cover the space between the
chimney and top of the glass globe or cylinder.
The plate or rim L may in some cases be fitted tightly to the top of the
glass globe or cylinder, so as to secure the metallic chimney without the rods
or pillars f, I.

page_text: Having thus described the nature of the said Invention, and in what
manner the same is to be performed, I would have it understood that I make
no claim to the several parts above described and referred to when taken
separately, nor do I claim the lamp and such parts as are herein described as
of the ordinary description for burning mineral oil; but what I do claim is,
the combination of a metallic chimney and glass globe or cylinder applied to
a mineral oil lamp, as herein set forth and described.
In witness whereof, I, the said James Robson, junior, have hereunto
set my hand and seal, this First day of June, in the year of our
Lord One thousand eight hundred and sixty-one.
JAMES ROBSON, JUNIOR. (L.S
(L.S.)
Witness,
THOMAS GRIEVES MABANE,
13, Eleanor St., So. Shields.