Improvements in Lamps for Burning Paraffin, or similar Oils or Liquids.
Year: 1897

page_text: Date of Application, 29th June, 1897-Accepted, 28th Aug., 1897
COMPLETE SPECIFICATION.
Improvements in Lamps for Burning Paraffin, or similar Oils or
Liquids.
We, DAVID GRIFFITI LEWIS, of 29; Beaufort Street, Brynmaur, Breconshire,
Grocers' Manager, and JOHN DAVIES, of 24, Boundary Street, Bryumaur, Miner, 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:-
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Our invention relates to certain improvements in the kind of lamp which is
the subject matter of Patent 20587/94. In the specification of the said Patent,
the vents are in the form of short upwardly curved tubes or nipples closed at
the upper ends by screw or other caps, having in them a number of perforations.
These vents only extend a short distance into the reservoir. Further the burner
was attached by a bayonet joint. Our improvements consist in extending the
vents" (hereinafter called "air-tubes") so that they are of such length that they
may be curved round within the reservoir. The total length of all the tubes may
be about equal to the internal circumference of the reservoir. The inlet ends
of the air-tubes are covered with gauze over which is fastened by screwing or
otherwise a perforated cap or thimble. The burner is screwed into the reservoir
in order that so far as the burner is concerned, there may be no communication
between the interior and exterior of the reservoir, except by way of the wick tube,
the usual holes each side of the wick tube of duplex lamps, being also omitted.
The air-tubes may dip downwards from the inlet end, so that no oil may rest in
them. In order that our invention may be the more readily understood, we make
reference to the accompanying sheet of drawings in which, Fig. 1, is a plan
shewing the direction of the air-tubes, and Fig. 2; a vertical section through the
inlet end of an air-tube.
a is the reservoir, the screwed opening for the burner. c the air-tubes curved
round the inside of a. As already explained, these tubes are intended to be
somewhat lower at the end d in order that oil may not rest in them.
e are the
air inlets, screwed at f. Above ƒ may be a gauze cover g or several gauze covers.
These tubes and
Over is screwed the perforated cap, thimble, qu rose h.
accessories are preferably made of metal.
We do not confine ourselves to the precise configurations, relative proportions
or disposition of parts as shewn in the accompanying drawing or described in the
above specification, as considerable variation is possible without departure from
the spirit of our invention.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
Providing the reservoirs of lamps for burning paraffin and other oils or liquids,
with an air-inlet or with air-inlets, the said inlet or inlets communicating with
an air-tube or with air-tubes, preferably curved to follow the contour of the

page_text: interior of the reservoir, the exterior end, or ends of the said air-inlet or air-inlets
being covered with gauze over which is placed a perforated thimble, rose or cap,
the whole substantially as described in the above specification, and exemplified
in the accompanying drawings.,
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HUGHES & YOUNG,
23, Coleman Street, London; E.C., Agents for Applicants.