Improvements in the Construction of Oil Lamps.
Year: 1894

page_text: Date of Application, 2nd Oct., 1894
Complete Specification Left, 20th Nov., 1894-Accepted, 12th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Oil Lamps.
EDWARD JOHN SHAW Hatherton Street Walsall, Glass and Lamp Manu-
facturer, do hereby declare the nature of this invention to be as follows:-
Outside and on the top of the ordinary metal oil container of a petroleum or
other oil lamp, I fix a small metal cap and in this cap I insert a small piece of
clear glass. Connected with this cap is a metal tube which descends into the oil
Inside this tube is a loose ball or disc, made of light material, to act as
container.
a float.
.
When the lamp container is empty, this float falls to the bottom of the tube,
but on the oil being poured into the oil container the float rises inside the tube, and
is presently seen through the glass covered aperture in the metal cap. By this
means the height of the oil in the coutainer is indicated. I arrange the bottom of
my tube so that the oil has free ingress.
Dated this 1st day of October 1804
Pimprove the struction Lamps,
EDWARD JOHN SHAW of Hatherton Street, Walsall, Glass and Lamp Manu-
facturer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:-
My invention relates to improvements in the construction of oil lamps but may
also be applied to oil stores, oil and water tanks and other purposes in which the
use of a floating indicator is desirable for ascertaining when the containing vessel is
full of fluid.
It consists of a glass covered aperture formed in the top of the metal oil
coutainer of the lamp or other vessel; and a metal tube one end of which is fitted
in the aperture while the other end extends downwards for a certain distance inside
the vessel and is perforated at top and bottom, a colored ball or disc of cork,
hollow metal, glass or other suitable light material being arranged to rise and fall
within the tube with the fluid in the container, and thus acting as a floating
indicator.
On the accompanying drawings illustrating the application of my invention to an
oil lamp,
Figure 1 is a vertical section of an oil lamp to which my improvements are
applied.
Figure 2 being a similar view shewing the position of the float when the container
is filled with oil.
In carrying out my invention, I fix outside and on top of the ordinary metal oil
container A of a petroleum or other oil lamp, a small metal cap B, and in this cap
1 insert a small piece of flat or dome-shaped glass C, secured in position by cement,
or by means of a screw ring or by any other suitable method. Connected with the
حزم:

page_text: metal cap B by screwing or otherwise, is a metal tube 1), which extends downwards
through an aperture into the oil container for any distance short of the bottom,
or, I may attach the tube D to the top of the container A, instead of to the metal
cap B.
Inside the tube D I arrange a loose ball or disc, E, of cork, wood, vulcanite,
hollow metal or other suitable light material to act as a float. A small hole Fis
provided near the top of the tube for the passage of air, and one or more
perforations G are formed' at its lower end for the admission and egress of oil.
In action when the lamp container is empty or nearly so the float E falls to the
bottom of the tube D, as shewn on Figure 1, but on a fresh supply of oil being
poured into the container A, the float E will rise with the oil inside the tube Ď
and become visible through the glass covered aperture C in the metal cap B. By
this means the height of the oil in the container A is indicated, and can readily be
observed when desired.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In resorvoirs or tanks for mineral and other oils the indicator consisting of a
metal cap B, having a glazed sighthole C, and dependent tube D perforated at top
and bottom, within which is arranged a coloured float E, as and for the purposes
described:
2. A reservoir A having a glazed sight-hole C, dependent tube D, perforated at
top and bottom, and enclosing a float E, substantially as and for the purposes
described and illustrated upon the accompanying drawings.
Dated this Twentieth day of November 1894.