Improvements in Gas Lamps.
Year: 1890

page_text: Date of Application, 17th Dec., 1890
Complete Specification Left, 15th Sept., 1891-Accepted, 17th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in Gas Lamps.
I, ADAM WIGHTMAN CLARK, Junior, of 22 Abbotsford Place, Glasgow, in the
County of Lanark, North Britain, Brassfounder, do hereby declare the nature of
this invention to be as follows that is to say :-
My said invention relates to gas lamps of the kind having an inverted annular
burner from which the gas jets descend and converge into a central uptake tube;
and my object is to simplify and improve the construction of such lamps.
In carrying out my invention I employ a single upper pendent gas supply pipe
which at its bottom diverges in a pair of symmetrical branches either both com-
municating with the main burner, or only one doing so and the other communicating
with a small permanent or pilot burner for lighting the main jets..
The body of the lamp is carried by the two branch gas supply pipes, which have
fixed to their lower ends an upper ring having fixed to it the upper part of the
central uptake or chimney tube. At a little distance below the upper ring there
is an annular chamber which receives the gas through one or more tubular parts
connecting it to the upper ring; and to the inner and lower part of the annular
chamber there is screwed a burner piece in which an annular series of jet orifices
are formed. This burner piece can be easily detached for cleaning or for being
replaced by a new or different one. The downward continuation of the uptake or
chimney tube consists of a bottom piece with flared mouth of porcelain or other
suitable refractory material, and which is fixed to a metal tube capable of being
screwed into the upper ring.
The parts which have been described are encompassed by an ornamental external.
shell into the lower part of which the external air has access. The air enters
over a cylindrical shell into a space around and above the annular gas chamber,
and a part passes over the top edge of an inner cylindrical shell formed or fixed on.
the chamber, and descends between that shell and the uptake or chimney, and
reaches the inside of the gas jets by passing down between the burner piece and the
lower part of the uptake or chimney. The air thus supplied is highly heated by
contact with the uptake or chimney. Another portion of the air passes down
outside of the annular gas chamber, and through orifices in an annular flange or
plate below that chamber, so as to be directed upon the outside of the gas jets. A
glass globe is fitted in a usual manner so as to enclose a space under the burner...
Dated this Sixteenth day of December 1890.
EDMUND HUNT,
Applicant's Agent,
COMPLETE SPECIFICATION.
Improvements in Gas Lamps.
I, ADAM WIGHTMAN CLARK, Junior, of 22, Abbotsford Place, Glasgow, in the
County of Lanark, North Britain, Brassfounder, 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, that is
to say :-
My said invention relates to gas lamps of the kind having an inverted annular
burner from which the gas jets descend and converge into a central uptake tube;
5 and my object is to simplify and improve the construction of such lamps.

page_text: And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings
to be hereinafter referred to and showing my improved gas lamp in sectional
elevation.
In carrying out my invention I employ a single upper pendent gas supply
pipe, A, which at its bottom diverges into a pair of symmetrical branches, B 1, 132,
one B2, communicating with the main burner and the other, B1, communicating
through a stopcock, C, and small pipe, D, with a small permanent or pilot
burner; E, for lighting the main jets. Or both the branch pipes, B1, B2, may
communicate with the burner the one, B1, communicating also, as described, with
the pilot burner, E.
The body of the lamp is carried by the two branch gas supply pipes, B1, B2,
which have fixed to their lower ends an upper ring, F, of angle-shaped section,
having fixed to it the upper part of the central uptake or chimney tube, G. At a
little distance below the upper ring, F, there is an annular chamber piece, H,
which receives the gas through one (or more) tubular part, J, connecting it to the
upper ring, F; and to the bottom of the inner part of the annular chamber
piece, H, there is screwed a burner piece, K, in which an aunular series of jet
orifices are formed; each of these jet orifices having fitted in its upper end
a. short tube, L, to prevent any tarry matters which may deposit out of the
gas from choking the orifices. This burner piece, K, can be easily detached
for cleaning or for being replaced by a new or different one. The downward
continuation of the uptake or chimney tube, G, consists of a bottom piece, G 1,
with flared mouth of porcelain or other suitable refractory material, and which
is attached to a metal tube, G 2, capable of being screwed into the upper ring, F.
The parts which have been described are encompassed by an external ornamental
--shell, M, into the lower part of which the external-air-has-access-as-indicated by
the arrows. A perforated conical (or it might be-a-cylindrical)-shell, N, extends
between the upper ring, F, and an extension of the-plate forming the top of the
annular chamber, H. The air enters through the perforations into a space around
and above the annular gas-chamber, H, and a part descend's between the burner
piece, K,.and the lower part, G1, of the uptake or chimney. The air thus supplied
is highly heated by contact with the uptake or chimney. Another-portion_of_the_
air passes down through holes, P, in the part of the top plate of the annular
chamber, H, extending-outside-of-that-chamber, and through orifices in an annular
flange or plate, K 1, formed in a piece with the burner piece, K, so as to be directed
upon the outside of the gas jets. A glass globe, Q, is fitted in a usual manner so
as to enclose a space under the burner; and the branch pipe, B 2, is fitted with the
usual stopcock arrangement, R, for turning the gas on and off.
Having now particularly described and ascertained the nature of my said inven-
tion and in what mauner the same is to be performed, I declare that what I
claim is-
-
The combination of parts forming my improved gas lamp as hereinbefore
described and as shown in the accompanying drawing.
Dated this Fourteenth day of September 1891.
EDMUND HUNT,
Applicant's Agent.