Year: 1887

page_text: I, FREDERICK SIEMENS of No. 12 Queen Anne's Gate, in the County of Middlesex,
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 a construction and arrangement of a regenerative gas lamp,
having a horizontal flame fed with air heated by its passage over surfaces that are
heated by the combustion.
Fig. 1 of the accompanying drawings is a vertical section and Fig. 2 is a sectional
plan on X X of a lamp according to my invention. Within a transparent or trans-
lucent globe G, is fixed a slit burner B giving a flat horizontal flame F. In order
to prevent the flame from spreading too widely as it issues from the slit of the burner,
I provide on the burner, immediately behind the slit, projecting ears 1, or it might be
a ring of similar section extending all round.
The products of combustion pass up through a slot S into a cavity R and thence by
orifices to the chimney E. Air from without enters by orifices Z into a casing
surrounding the base of the chimney, passes under the cavity R and issues by a number
of small holes o through a perforated reflector H.
By passing over the heated surfaces at the base of the chimney E and under the
cavity R and through the holes of the reflector H, which is highly heated by radiation
from the flame, the air thus supplied is itself highly heated. Some of the heated air
supplies the upper side of the flame F keeping the flame quite clear of the reflector,
and some of it, passing behind and at the edges of the flame, into the globe cavity
below, supplies the under side of the flame which is thus caused to burn with great
brilliancy. The reflector may be flat or may be more or less concave or convex
according as it may be desired to distribute the light.
For the purpose of starting the lamp into action and of lighting the flame F, a small
gas jet is directed through one of the air orifices Z into the cavity R. This jet,
being lighted from without, starts the draught in the chimney E, and then the gas
being turned on for the burner B the main flame F is ignited by the jet x, which can
then be extinguished. There is thus no opening or removal of the globe G required
for lighting the lamp.

page_text: Instead of a slit burner B, another form of burner giving a flat flame may be used,
and instead of a single burner there might be several radiating from the gas pipe, each
giving a flame supplied with air through a reflector and discharging the products of
its combustion through one chimney or separate chimneys as above described, the
globe G being in that case enlarged so as to enclose all the flames.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed I declare that what I claim is :-
A regenerative gas lamp having a horizontal flat flame within a globe, supplied
through holes of a perforated reflector above it with air heated by its passage along
surfaces heated by the products of combustion on their way to the chimney, and by its
passage through the reflector heated by radiation from the flame substantially as herein
described.
ABEL & IMRAY,
Agents for the Applicant.