Improvements in Lighting and Heating Apparatus.
Year: 1895

page_text: Date of Application, 12th Jan., 1895-Accepted, 23rd Mar., 1895
COMPLETE SPECIFICATION.
Improvements in Lighting and Heating Apparatus.
We, CARL RIEMANN, of Niemannsweg No. 19, Kiel, Doctor of Philosophy, and
CHRISTIAN STOLDT, of Jagerstrasse No. 50, Hamburg, Gentleman, 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:
'
This invention consists in a petroleum lamp which can be used for lighting as
well as for heating purposes, and in which the petroleum is forced from its reservoir
to the burner automatically, by the expansion of the air in a vessel especially
provided for it. In such appliances hitherto employed, this has been effected by
compressed air pumped into the petroleum vessel.
The accompanying drawing illustrates the invention in cross section.
The petroleum vessel a has on the top a cupola shaped air chamber b, with air
spaced between which is spirit vessel c.
A pipe e leads from near the bottom of the petroleum vessel a up through air-
chamber band spirit vessel c branching into two pipes f, which terminate in the
hollow ball g.
The two pipesh extend in a downward direction, and unite in vessel c, being
provided with an opening i. The pipes h are fixed on the hollow ball in such a
way that their open ends protrude slightly.
As
When the lamp is put into action the vessel e is filled with spirit which is then
ignited, by means of which pipes h h and air-space d surrounding the vessel • get
warmed. The air in d conducts heat into chamber in which the air expands, causing
pressure upon the surface of the petroleum which thereby ascends in pipe e.
soon as it has entered pipe branches f, it evaporates and passes in hollow ball
through pipe h, escaping through opening i and then ignites. The flame touches
the hollow ball g and reaches above it, so, that the lamp may be used for cooking
purposes or (by putting upon part g suitable chemicals, as for instance "Drummonds
lime," or "Dr. Auer's incandescent fabric ") for lighting purposes.
g
When the spirit vessel c is burnt out, no alteration in the effect of the lamp is to
be noticed, as the heating of the air and oil pipes is done by the petroleum flame
itself.
The protruding of the pipes h above the bottom of the hollow ball 9 prevents
petroleum entering these pipes, in case it should have got into part 9 through too
much pressure.
To prevent over pressure in petroleum vessel a, it is provided with
valve regulated by screw and spring.
This valve may easily be unscrewed, and serves also for admission of petroleum
into vessel a.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we hereby declare that
what we claim is :-
CLAIMS.
1. In petroleum lighting and heating apparatus the air chamber con-
nected with the petroleum vessel a connected with air space d surrounding spirit
vessel C, for the purpose of warming the air in air chamber b, and using the
expansion thereof to force the petroleum vapour through the pipes / h, into the

page_text: burner, substantially as hereinbefore set forth and described and illustrated by
the accompanying drawings.
Dated this 11th day of January 1895.
HUGHES & YOUNG,
23, Coleman Street, London, E.C., Agents for the Applicants.