Improvements in Gas Lighting.
Year: 1890

page_text: Date of Application, 18th Nov., 1890
Complete Specification Left, 10th Aug., 1891-Accepted, 14th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Gas Lighting.
THOMAS ARTHUR GREENE and CHARLES MAYNARD WALKER both of
155 Cannon Street London E.C. Gas Engineers do hereby declare the nature of
this invention to be as follows:―
The present invention relates to the construction of that class of gas lamps in
which the air supporting combustion is superheated by the heat of the flame and
has for its objects the simplification of, and reduction of the parts of the lamp, and
increased convenience in use- -We construct a lamp preferably with a central gas
supply pipe running down the centre of the flue to a point below the glass of lamp,
on the lower end of this pipe we fit an upright "Argand burner" having a socket
into which the supply pipe passes, the bottom of this socket is left open aud may
be closed either by a tap or screw plug, surrounding the flue pipe at its lower end
is a conical air way reaching down to a convenient point towards the burner, a disc
is attached to the gas pipe at a convenient distance from the burner for the purpose
of deflecting the flame to the required shape-A glass preferably of an oval form
is fitted to the under side of the top of the air way and is supported at its lower end
by a socket-fitting surrounding the burner and is thus held into its position-the
annular space between the socket and burner may be used as a subsidiary air way
to the outside of the flame.-The lamp is lit from the inside of the burner the flame
passing upwards and around the deflector to the flue-the air passing upwards
through the centre of the burner supplies the inside of the flame-and a current of
air is also induced down the air-way from the top supplying the outer surface of
the flame.
10
T
COMPLETE SPECIFICATION.
Improvements in Gas Lighting.
We, THOMAS ARTHUR GREENE and CHARLES MAYNARD WALKER, both of
155, Cannon Street, London E.C., Gas Engineers, 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:-
Our invention relates to gas lamps of the kiud in which the air for supporting the
combustion is heated by the flame and products of combustion, and our object is to
simplify the construction of such a lamp and to secure efficiency and convenience in
its use.
The accompanying drawing is a vertical section of a lamp according to
our invention. H is the gas supply pipe the lower end of which is closed by a
Screw cap or plug E removable to clear out such matter as may be deposited from
the gas. Gas passes by several branches T to an elongated Argand burner C,
which is surrounded by a concentric jacket B, so that there is a narrow annular air
passage between the jacket and the burner tube. On the jacket which is held on
the burner tube by a bayonet catch, there is a flange F supporting the glass V.
Below the flange F there are perforations through the jacket tube by which air
can enter, some of it passing by perforations above the flange into the space
enclosed by the glass, but most of the air ascending between the jacket and the
burner and so becoming highly heated and issuing under the flame which is spread
outwards by a deflector D, and above the deflector turns inwards to the mouth of
the chimney G.

page_text: The chimney which is carried on the gas pipe H has its lower end surrounded by
a concentric casing A, the lower part of which is perforated with numerous holes.
Above the casing is a loose flanged ring K resting on the upper edge of the glass V
which is of an elongated bulbous form, enclosing the whole of the lamp except the
upper part of the chimney and the lower part of the Argand burner. The lamp
being lighted by introducing a taper or long match from below inside the Argand
burner, the flame is supplied with heated air, partly below from the jacket B and
partly above from the annular passage between the chimney and the casing A.
The ring K being loose covers the upper edge of the glass without strain,
notwithstanding expansion or contraction of the metal parts of the lamp within.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
A gas lamp having an Argand flame spread out below by a deflector and con-
tracted above towards a central chimney, and supplied with air partly from below
heated by conduction from the burner and partly from above heated by conduction
from the chimney, the burner and air passages all enclosed within an elongated
bulbous glass, substantially as described.
Dated this 8th day of August 1891
ABEL & IMRAY,
Agents for the Applicants.