Automat Mers for Lamps.
Year: 1887

page_text: Date of Application, 25th Aug., 1887
Complete Left, 25th May, 1888
Complete Accepted, 27th July, 1888
Improv
Automat Mers for Lamps.
I, FREDERICK WILLIAM DURHAM of No. 27 Leadenhall Street in the City of
London, Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to extinguishers for oil lamps so arranged that on the lamp
being tilted or upset, the flame is automatically extinguished.
For this purpose when I apply my invention to a circular wick lamp I construct
the lamp with additional sliding tubes one on the outside and the other on the inside
of the wick tube. When applied to a flat wick lamp, I construct the lamp with an
outer tube entirely surrounding the wick tube.
Below these additional tubes I place light springs which are compressed by their
weight.
When the lamp is tilted or upset the springs are relieved of some part of the weight
of the additional sliding tubes which are thus projected outwards and thus form
continuations of the wick tube extinguishing the lamp in the same manner as if the
wick had been turned down within its usual wick tube.
TIL
C
1007
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, FREDERICK WILLIAM DURHAM of No. 27 Leadenhall Street in the City of
London, Engineer, 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 extinguishers for oil lamps so arranged that on the lamp
being tilted or upset the flame is automatically extinguished.
For this purpose, when I apply my invention to a circular wick lamp, I construct
the lamp. with additional sliding tubes one on the outside and the other on the inside
of the wick tube. When applied to a flat wick lamp I construct the lamp with an
outer tube entirely surrounding the wick tube.
Below these additional tubes I place light springs which are compressed by their
weight.
When the lamp is tilted or upset the springs are relieved of some part of the
weight of the additional sliding tubes which are thus projected outwards and thus
form continuations of the wick tube extinguishing the lamp in the same manner as if
the wick had been turned down within its usual wick tube.
Fig. 1 of the accompanying drawings is a vertical section and Fig. 2 is a plan of a
circular lamp burner provided with an automatic extinguisher according to my.
invention. Fig. 3 is an elevation and Fig. 4 a plan shewing a similar extinguisher
applied to a duplex flat wick burner.
Referring to Figs. 1 and 2, W is the cylindrical wick tube having outside of it the
usual air.cone C and having the central air deflector D. Outside and Inside of the
wick tube I fit freely sliding tubes E and F, which rest on springs S usually in
the position shewn in Fig. 1, their weight so far compressing the springs that they do
not rise above the top of the wick tube.. When however the lamp overturned or.
even seriously canted, the springs are so far relieved from the direct vertical weight
of the tubes E F, that these tubes are caused to slide upwards, the outer tube E'till it
is stopped against the cone C and the inner tube F till it is stopped against the
deflector D. The lower part of the flame being thus enclosed in the annular space
between the tubes E and F so as to receive an insufficient supply of air, is at once
extinguished.
Referring to Figs. 3 and 4, each wick tube W is fitted with a freely sliding tube H,
and these are rigidly connected by a cross piece which is engaged in the fork of a
lever L connected to a volute spring in a barrel S, this spring being so adjusted as to
balance the weight of the tubes H in the position shewn in Fig. 3. When the lamp
is seriously canted so that the weight of the tubes H no longer acts directly, the spring
in S causes them to rise, enclosing and extinguishing the flames in the same manner
as the tubes E, F, in Fig. 1. The tubes H may be plain at the top, but I, prefer to
provide them, as shewn, with hinged shutters K made with wing pieces so that,
as the tubes H ascend, these wings bear against the interior of the cone C and

page_text: the shutters are thus caused to fold over the wicks. The projecting end of the
lever L is made to receive the pressure of the finger when the light is to be
purposely extinguished.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:
An automatic extinguisher for a lamp wherein tubes enclosing the wick tube and
resting on springs are clear of the flame when they are vertical, but, when, owing
to canting of the lamp, their weight does not act vertically, they are pressed up
by the springs so as to enclose the root of the flame, extinguishing it, substantially
as herein described.
ABEL & IMRAY,
Agents for the Applicant.