An Improvement in Overhead Regenerative Gas Lamps.
Year: 1895

page_text: Date of Application, 26th Apr., 1895-Accepted, 1st June, 1895
COMPLETE SPECIFICATION.
An Improvement in Overhead Regenerative Gas Lamps.
We, THE LAMP MANUFACTURING COMPANY LIMITED, of 12 and 14 Leonard
Street, City Road, in the City of London, and WILLIAM HENRY ISAAC WELCH,
of 68, Coborn Road, Bow, in the County of London, Lamp Maker, 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 :-
This invention relates to a compact and effective construction and arrangement
of the passages for the entering air and the issuing products of combustion in an
overhead regenerative gas lamp as we shall describe referring to the accompanying
drawings.
Fig. 1 is a vertical section and Fig. 2 is a sectional plan on the line X X of
Fig. 1 of a lamp according to this invention with the passages adapted for a
circular flame.
Fig. 3 is a vertical section and Fig. 4 is a part vertical section on a plane at
right angles to that of Fig. 3, and
Fig. 5 is a sectional plan on X X of Fig. 4 of a lamp with the passages adapted
for a flat flame.
In all the figures like reference letters are employed to denote corresponding
parts.
The passages for the entering air and for the issuing products of combustion are
formed in a casting A having an upper side a and a lower side a integral with a
number of tubular bosses B connecting them. Air entering to supply the flame
flows through the bosses B while the products of combustion flow around and
through between the bosses B on their way to the chimney C. When the flame is
circular as in the lamp shewn in Figs. 1 and 2 the heated air passes into a casing D
and through a perforated shell E to supply the upper side of the flame of the gas
issuing from the perforations of the circular burner F. The casing D is held up
to the casing A by the shell E which is screwed on the gas pipe G. The air to
supply the underside of the flame enters by perforations H of the flange of A and
flows into the interior of the glass globe K. The products of combustion flow
through an annular opening of a reflector L, ascend outside the shell D, and flow
through between and around the bosses B to the chimney C. The casing D, and
casting A being heated by the products of combustion impart heat to the air
entering to supply the flame. The casting A has hinged to it at M the ring N
which carries the globe K, and which is held up by a latch O, on disengaging
which the ring and globe can be turned down giving access to the interior parts of
the lamp and to the interior of the globe.
When the lamp has a flat flame as shewn in Figs. 3, 4 and 5 the products of
combustion flow through an elongated aperture p into an arch P, thence each way
and up, then between and around the bosses B to the chimney C, while the air
enters through the bosses B, descends on each side of the arch P into a space
above the reflector L and flows thence through perforations of the reflector into
the globe K, being highly heated on its way. The arch P is formed through a
cylindrical boss 9 projecting upwards from a horizontal disc Q to which the
reflector L is fixed, and which has a flange q' resting on the internal flange of an
outer casing R.
The casting A is screwed on the boss q, its edge being thus made to bear tightly
on the surface of Q. The casting A and all the parts attached to it can be lifted

page_text: ont, giving access to them and to the interior of the globe, from which also the gas
burner F and pipe G can be raised by turning the pipe on its joint S.
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 :-
1. An overhead regenerative gas lamp having the passages for entering air and
issuing products of combustion formed in a casting the upper and lower sides of
which are integral with a number of tubular bosses connecting them and adapted
for inflow of the air through them and outflow of the products of combustion around
and between them, substantially as described.
2. In a lamp such as is above referred to, in combination with the casting having
passages for inflow of air and outflow of products of combustion, a central perforated
shell and casing surrounding it, adapted for flow of air to a central circular
burner, and an annular passage around the said casing adapted for flow of products
of combustion from the burner, substantially as described.
3. In a lamp such as is above referred to in combination with the casting 'having
passages for inflow of air and outflow of products of combustion, a horizontal
disc with cylindrical boss projecting up from it through which is formed an arch
with an opening at bottom adapted for flow of the products of combustion through
the arch, and for downflow of the air on each side of the arch, and a reflector
perforated for flow of air into a globe containing a flat flame burner substantially
as described.
Dated this 26th day of April 1895.
ABEL & IMRAY,
Agents for the Applicants.