Improvement in Petroleum or Paraffin Lamps to Prevent the Bursting of the Reservoir.
Year: 1887

page_text: 1887
Date of Application, 15th Feb.,
Complete Left, 14th Nov., 1887
Complete Accepted, 16th Dec., 1887
PROVISIONAL SPECIFICATION.
Improvement in Petroleum or Paraffin Lamps to Prevent the
Bursting of the Reservoir.
EMIL SUNDBORG 22 Mundella Road New Road Battersea Watch and Clock Maker
do hereby declare the nature of this invention to be as follows:-
:―
In order to prevent the Bursting of the Reservoir through any explosion, there is
provided a safety opening on the top of the reservoir provided with a spring valve,
or other valve or friction tight cover to the opening, or other covering, for the purpose
of preventing the liquid contents from running out if the Lamp be upset. The
spring valve or other covering to be so arranged that any pressure from sudden explo-
sion inside the lamp would open it, relieve the pressure, and there would be no fracture
and no conflagration. The Reservoir made of Metal, Glass or China. Old Lamps may
be fitted with this Safety Valve and New Lamps of all forms may be made with it.
Dated this Fourteenth day of February 1887.
WILLIAM WYNN WESTCOTT,
Agent for Emil Sundborg.

page_text: COMPLETE SPECIFICATION.
Improvement in Petroleum or Paraffin Lamps to Prevent the
Bursting of the Reservoir.
I, EMIL SUNDBORG of 61 George Street Portman Square in the County of
Middlesex Watch & Clock Maker 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 said invention has for its object the prevention of the bursting of the oil
reservoirs of Petroleum or Paraffin lamps caused by the explosion of the gases
generated therein. This object I attain according to my invention by providing at
the top of the oil reservoir above the oil a safety or release valve fitted with a spring
valve or other cover to provent the oil escaping through such safety or release valve
if the lamp be upset. The spring valve or other cover fitted to the safety or release
valve is so arranged that the pressure upon it consequent on any explosion within the
reservoir at once removes it and thereby the pressure within the reservoir is relieved
and no fracture of the reservoir or conflagration results. And in order that my
invention may be more completely understood reference is made to the accompanying
sheet of drawings.
Fig. 1 is a side elevation of a lamp constructed with a safety or release valve fitted
with a spiral spring valve according to my invention. The various parts composing
this mechanism are shown separately in Figs. 2 and 3-Fig. 2 is the safety or release
valve to be fitted to the reservoir by soldering or other suitable means. Fig. 3 is the
spiral spring valve which is fitted at the top of the safety or release valve and retained in
its place by the hook A (shown in Figs. 1 and 3) which is adjusted on the bar B
(shown in Figs. 1 and 2) fixed across the lower extremity of the safety or release
valve. The spring may be of any strength so long as the resistance it would offer in
the event of an explosion is less than that offered by the walls of the reservoir.
Fig. 4 is a side elevation of a lamp constructed according to my invention with a
safety or release valve fitted with a top of a cheaper and somewhat different construc-
tion to the spiral spring valve shown in Figs. 1 and 3. In this case the safety or
release valve is fitted to the Lamp in the manner previously described but instead of
using the spiral spring shown in Fig. 3, I use a plain flat spring (Figs. 5 and 6)
screwed or rivetted or otherwise fastened to an excrescence or projection (c) made on
the lamp for the purpose as shown in Fig. 4.
If preferred and for the purpose of very cheap lamps the safety or release valve
may be fitted according to my invention with an ordinary friction tight moveable
cover fastened to the lamp by a chain as shown in Fig. 7. I prefer however to employ
the mechanism illustrated in Figs. 1 to 6.
According to my invention the safety or release valve and its cover may be made
of metal china glass or other suitable material and the safety or release valve may be
fitted to the lamp reservoir by soldering or other suitable means or (in the case of

page_text: new lamps) it may be made in one piece with and as an essential part of the
reservoir.
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
The application to petroleum or paraffin lamps of a safety or release valve fitted
with a spring valve or other cover substantially as and for the purposes herein before
described.
WILLIAM WYNN WESTCOTT,
396, Camden Road, London, N.,
Agent for Emil Sundborg.
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