Improvements in Lamps.
Year: 1891

page_text: Date of Application, 13th Jan., 1891-Accepted, 25th Apr., 1891
Improvements in Lamps.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the
General Patent Office, No. 4, South Street, Finsbury, in the County of Middlesex,
Patent Agents, do hereby declare the nature of this invention (a communication
from abroad by Fritz Deimel, of 50, Kommandanten Strasse, Berlin, in the
Empire of Germany, Silver Chaser), and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in lamps and consists in providing the
lamp with an air chamber at the top connected to a metal chimney gallery in such
a manner as to allow highly heated air to flow into the top of the lamp where it
comes into contact with a ring which is kept highly heated by the flame and by
means of which the current of air which supports combustion becomes divided into
two parts entering the interior of the lamp in approximately opposite directions one
part of the said air current thereby causing the other part which impinges upon
the flame to flow more slowly and be kept long enough in contact with the flame to
prevent it from flickering the fresh air being supplied in just sufficient quantity to
effect a complete combustion.
In order to enable the invention to be fully understood I will describe how it can
be carried into practice by reference to the accompanying drawing which represents
a vertical section of a lamp constructed according to this invention.
The lamp burner A is provided with a globe A¹ above which is a support B for
a flame spreader a suspended therefrom and a gallery C for a metal chimney B' as
usual.
a² is the air heating chamber with which I provide the lamp the said chamber
being connected to the gallery C and carrying the support B and having fixed to it
the hereinbefore mentioned ring c which is kept highly heated by the flame of the
lamp. The chamber a¹ is constructed of two shaped plates forming walls the outer
of which is provided with openings to admit the outside air to the interior of the
heating chamber a¹. The bottom of the chamber a¹ is also provided with openings
which are screened by the ring c in such a manner that the air from the heating
chamber a' is partly conducted upwards direct towards the chimney B' and partly
downwards towards the flame as indicated by the arrows.
When now the lamp is alight the outer air flows through the openings in the outer
wall C into the heating chamber a' from which the now highly heated air flows
towards the ring c. In striking against the latter it becomes divided and while one
part of it flows directly into the chimney the other part flows downwards to the
flame and effects the complete combustion of the gas.
By dividing the air current and causing the two currents to strike against the hot
ring c and then to flow in approximately opposite directions, not only is a very
highly heated air current obtained but the speed of the current is reduced to such
an extent that a perfectly steady and even flame is maintained.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A lamp having its top part provided with a heating chamber formed at the
lower part of the chimney gallery and having openings leading towards the flame of
the lamp which openings are screened by a ring e highly heated by the flame, in
such a manner that the air as it enters the lamp from the heating chamber is divided
into two currents flowing in approximately opposite directions substantially as and

page_text: for the purposes hereinbefore described with reference to the accompanying
drawing.
2. The improved lamp hereinbefore described and illustrated in the accompanying
drawing.
Dated the 13th day of January 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.