AN IMPROVED LAMP
Year: 1873

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for the
Invention of "AN IMPROVED LAMP.”—A communication from abroad
by Thomas Howard White and Edgar Knight, both of Cleveland,
Ohio, United States of America, Manufacturers.
Sealed the 25th April 1878, and dated the 5th March 1878.
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 5th March 1878, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton Build-
ings, London, Doctor of Laws, send greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED
LAMP," and have petitioned Her Majesty to grant unto me, my execu-
tors, administrators, and assigns, Her Royal Letters Patent for the
same, and have made solemn Declaration that it has been communi-
cated to me from abroad by Thomas Howard White and Edgar Knight,
both of Cleveland, Ohio, United States of America, Manufacturers.

page_text: NOW KNOW YE, that I, the said George Haseltine, do hereby declare
that the following Complete Specification, under my hand and scal, fully
describes and ascertains the nature of the said Invention, and in what
manner the same is to be performed in and by the following statement,
reference being had to the accompanying Drawing forming a part of
|that the following Complete specification, under my manu and any any
describes and ascertains the nature of the said Invention, and in what
manner the same is to be performed in and by the following statement,
reference being had to the accompanying Drawing forming a part of
tinis Specification —
The object of this Invention is the production of a non-explosive lamp
for burning the ordinary carbon oils. The construction of the said lamp
and its operation are as herein-after described.
DESCRIPTION OF THE DRAWING.
Figure 1 is a side elevation of the said lamp; Figure 2 is a transverse
vertical section of the same; Figure 3 is a side elevation of a portion of
the said lamp detached. Like letters indicate the same parts throughout
the Drawing.
C represents the fount of the lamp, which may be of the shape shown, ]
or of any other desirable form; D is a chamber, provided with a broad
open mouth but closed at the bottom, as shown in Figure 2; from the
bottom and extending up through the chamber is an oil tubo E, the
lower end of which opens into the fount, whereas the upper end is raised
a little above it; in the upper end of the said tube is cut a screw, into
which is screwed the lower end of the wick tube F of the burner; above
the base of the burner is a perforated diaphragm G, from whose
periphery depends a plain skirt H, which when the wick tube is screwed
into the oil tube E surrounds the said tube, as shown in Figure 2.
The said skirt descends into the chamber below the top of the lamp, 1
as indicated by the dotted lines in Figure 2, but not so far as to touch
the bottom, there being a space between the bottom and the end of the
skirt for the admission of air to the inside of the skirt and thence to the
burner. Slits or openings may be made in the lower end of the skirt to
facilitate the admission of the air.
It will be observed that the burner is supported and held in a central
position relative to the body of the lamp by the base of the wick tube or
burner being screwed into the oil tube, as above described. The external
air which feeds the flame is admitted thereto from the chamber, which
as above described has a wide open top. The air passes down through ¦
the chamber, thence under the lower end of the skirt up around the oil
1

page_text: tube to the burner. By this device a current of cool air is caused to
flow about the entire length of the oil tube, thereby keeping it at a low
degree of temperature, preventing a generation of gas, and thereby
avoiding explosions, at the same time causing a steady and uniform
influx of air to the flame, preventing any sudden flashing and flickering
thereof.
The construction of this improved lamp is such that there can be no
direct communication of the flame with the bulk of the oil, the heat
being effectually cut off therefrom, hence there is perfect safety in the
use of the said lamp.
Having thus fully described the said Invention as communicated to
me by my foreign correspondents, and the manner of performing the
same, I wish it understood that I claim,―
First. The chamber D, oil tube E, and skirt H, arranged in combi-
nation with the fount O and a burner, as herein set forth and for the
purpose specified.
Second. Supporting the burner by securing the same to the oil tube E,
and arranging the skirt H to depend from the said burner down into the
chamber over the tube E, as herein set forth and for the purpose
specified..
Third. A lamp having a recess or chamber D in combination with the
depending skirt H, as herein set forth and for the purpose specified.
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and seal, this Fifth day of March, in the year of our
Lord One thousand eight hundred and seventy-three.
Witness,
JAMES EDWARDS,
8, Southampton Buildings,
London.
GEORGE HASELTINE. (L.S.)