An Improved Automatic Extinguisher for Lamps.
Year: 1890

page_text: Date of Application, 20th Oct., 1890
Complete Specification Left, 20th July, 1891-Accepted, 5th Sept, 1891
PROVISIONAL SPECIFICATION.
An Improved Automatic Extinguisher for Lamps.
I, JOHN WILLIAM PRICE, of Barrowgate Road, Chiswick, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention to be as
follows:-
My invention relates more especially to mineral oil lamps and it has for its object
a novel device by which if the lamp is inclined sufficiently from its proper vertical
position the flame is automatically extinguished.
For this purpose, I arrange and fix round the opening above the wick through
which the flame of the lamp passes a spherical surface of sufficient extent having a
central opening coinciding with the opening for the flame. Upon this spherical
direction upon the
surface I fit a hemispherical cap which can move freely in
fixed spherical surface described. The lower edge of the cap has preferably a wire
or beading round it, and the centre of its spherical surface has an opening through
it also corresponding with the opening for the flame.
any
When the openings coincide and the lower edge of the hemispherical cap is
horizontal, the flame burns freely, but if the lamp falls or is inclined sufficiently in
any direction, the hemispherical cap falls over in the same direction, turning upon
the concentric spherical surface and at once closing the opening and extinguishing
the flame.
I arrange outside the moveable cap, guides which keep it in its position and
prevent it from falling off. These guides may be in the form of a sufficient number
of wires fixed to the lamp at their lower ends and curved so as to fit round the
outside of the cap which can move freely inside them.
Or a fixed ring may be used fitting freely round the moveable cap at a sufficient
distance above its lower edge, so as to keep it in its place whilst allowing it to move
freely for the purpose described.
Stops may also be arranged to limit the movement of the cap, and projections
may be arranged between the spherical surface and the cap to reduce the friction.
The improved device is very simple, cheap, and efficient for the purpose required,
and may be applied to any kind of lamp.
Jon of otober 1800
EDWARDS & Co.,
35, Southampton Buildings, Chancery Lane, London,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Automatic Extinguisher for Lamps
I, JOHN WILLIAM PRICE, of Barrowgate Road, Chiswick, in the County of
Middlesex, Gentleman, do hereby declare the nature of the said invention and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement and accompanying drawing, that is to say :---
My invention relates more especially to mineral oil lamps, and it has for its
object a novel device by which if the lamp is inclined sufficiently from its proper
vertical position the flame is automatically extinguished.
For this purpose, I arrange and fix round the opening above the wick, through
which the flame of the lamp passes, a spherical surface of sufficient extent having

page_text: a central opening coinciding with the opening for the flame. Upon this spherical
surface I fit a hemispherical cap which can move freely in any direction upon the
fixed spherical surface.described. The lower edge of this cap may have a wire or
beading round it, and the centre of its spherical surface has an opening through it
also corresponding with the opening for the flame.
The accompanying drawing 'is in illustration of my invention :-
Figure is a side view of a lamp having my, invention applied to it, and
Figure 2 is a similar view partly in section.
Figure 3 shews separately the spherical surface upon which the hemispherical
cap fits, and
Figure 4 shews the cap separately.
Figures 5, 6, and 7, shew the cap in different positions.
The same letters of reference indicate the same parts in the different figures.
a is the body of the lamp, and 6 is the fixed spherical surface through which the
flame passes, and upon which the loose hemispherical cap c fits. d is the central
opening in the cap, and e are guides or guards which allow it to move freely but
prevent it from falling off altogether. When the lamp is in its proper position, as
shewn in Figures 1 and 2, the cap c is arranged as shewn in Figure 5, with its
central opening d coinciding with the opening for the flame through 6 but if the
lamp falls or is tilted to one side in any direction, the cap c falls over, as shewn in
Figures 6 and 7, covering the opening in b and instantly extinguishing the flame.
I prefer to make the upper edge of the hole through b very slightly raised so as to
project a very little into the hole in the cap c. By this means the lamp may be
carried about safely without risk of the cap e falling over and extinguishing it, but
if it should be sufficiently inclined or should fall over in any direction, the cap cat
once falls and extinguishes the flame.
Instead of the guards e a fixed ring may be used fitting freely round the moveable
cap c at a sufficient distance above its lower edge, so as to keep it in its place whilst
allowing it to move freely for the purpose described.
Stops may also be arranged to limit the movement of the cap, and projections
may be arranged between the spherical surface and the cap to reduce the friction.
Figures 8, 9, and 10, shew my invention applied to a lamp of the kind in which
an inner burner is surrounded by an outer fixed sheath having one or more openings
through which the flame passes. Figure 8 is a transverse section, shewing the
moveable cap or extinguisher in its central position, Figure 9 shews it inclined,
80 as to extinguish the flame, and Figure 10 is a side view of the external
sheath.
In this form of arrangement the loose cap c is situated between the burner 6, and
the outer sheath f, and is prevented by the latter from falling off. The upper part
of the outer sheath f may be hinged to the lower part, as shewn in Figure 10, to
facilitate the introduction and adjustment of the cap c when necessary, and the
inner sides of the sheath fare curved so as to prevent them from interfering with
the proper falling over of the loose cap c, when necessary, for the purpose of
extinguishing the flame.
The improved device is very simple, cheap, and efficient for the purpose required,
and may be applied to any suitable kind of lamp.
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. The loose hemispherical cap e having an opening d through it, in combination
with the fixed surface arranged and operating substantially as described and
shewn.
2. In combination with the loose cap chaving an opening d, the slightly
projecting edge round the opening through the surface b, as described and
shewn.

page_text: 3. In combination with the spherical surface b, and the loose cap c, having the
opening d, the guides or guards e for retaining the cap c, substantially as described
and shewn.
Dated this 20th day of July 1801
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.