An Improved Gas Lamp.
Year: 1893

page_text: Date of Application, 14th Mar., 1893
Complete Specification Left, 12th Dec., 1893-Accepted, 13th Jan., 1894
PROVISIONAL SPECIFICATION.
An Improved Gas Lamp.
I, FREDERICK SIEMENS, of 10 Queen Anne's Gate, Westminster, in the
County of London, Engineer, do hereby declare the nature of this invention to be
[as follows:
My invention relates to an arrangement of gas burners, globe or lantern, and
chimney constituting a lamp,, in such a manner as to obtain great brilliancy of
illumination.
I employ two flat flame burners side by side, somewhat inclined towards each
other, so as to produce a single flame, placed within a glass globe or lantern, under
a reflector which covers the globe or lantern, and which, at its outer edge, has
perforations, slits or other openings for admission of air. The air descends along the
interior surface of the globe or lantern and rises to supply the flame. The products of
combustion pass up-to a chimney through a hole in the reflector, which, in order to
ensure steadiness of combustion, should be approximately of the same shape as the
flame is in plan; in the case of a generally round chimney there should be in it a
diaphragm having an opening so shaped. The downward direction of the air
entering at the edge of the reflector is promoted by giving a suitable form to the
inlets. In such a lamp, cold air or air heated by a regenerator may be supplied for
feeding the flame, and in the case of hot air being used, the brilliancy of the light
will be increased. Instead of one duplex burner several of these may be arranged
in one globe or lantern, the openings to the chimney being suitably shaped.
Dated this 14th day of March 1893.
ABEL & IMKAI,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Gas Lamp.
I, FREDERICK SIEMENS of 10 Queen Anne's Gate, Westminster, in the
County of London, Engineer, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described aud
ascertained in and by the following statement:-
My invention relates to an arrangement of gas burners, globe or lantern and
chimney constituting a lamp, in such a manner as to obtain great brilliancy of
illumination. The accompanying drawing is a vertical section of a lamp according
to my invention.
I employ two flat flame burners A side by side somewhat inclined towards each
other, so as to produce a single flame, placed within a glass globe or lantern B
under a reflector C, which covers the globe or lantern and which, at its outer edge,
has perforations, slits or other openings D for admission of air to the globe. Cold
air might be thus admitted but I prefer to heat the air by causing it to pass along
annular channels E and F surrounding the chimney G, operating as a regenerator.
The air descends along the interior surface of the globe or lantern B and rises to
supply the flame. The products of combustion pass up the chimney G through a
hole H in the reflector, which, in order to ensure steadiness of combustion, should
be approximately of the same shape as the flame is in plan; in the case of a

page_text: generally round chimney there should be in it a diaphragm having an opening so
shaped. Instead of one duplex burner, several of these may be arranged in one
globe or lantern, the openings to the chimney being suitably shaped. The burners
are supplied with gas by pipes K which serve also to suspend, the lamp, and which
branch from one supply pipe L furnished with stop cock. By a bye pass M the
burners are supplied with a small quantity of gas to keep a small light burning
when the cock in L is closed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. A gas lamp having a duplex flat flame burner, or several of these, arranged
within a globe or lantern, under a reflector having at its outer edge openings for
admission of air to the globe or lantern, and having about its middle an opening or
openings of shape suited to the flame or flames, for passage of products of
combustion to a chimney, substantially as described.
2. In a gas lamp such as is above referred to, annular regenerator channels
surrounding the chimney, substantially as described.
Dated this 12th day of December 1893.
;
ABEL & IMRAY,
Agents for the Applicant..