Year: 1886

page_text: I, CHARLES MARSHALL LUNGREN, of the City, County and State of New York,
United States of America, Civil 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 :-
The object of this invention is to provide an improved construction of regenerative
gas lamps of the type in which the air to supply the interior of the flame is intro-
duced into it through passages leading across the escape flue. The great difficulty
experienced with lamps of this form has been the clogging up of the gas burner
portion of the apparatus by overheating.
In the present lamp I remedy this defect by placing the gas burner below the flame,
and arrange air passages around and through it in such relation to the external air
that the gas burner and tip are bathed by currents of comparatively cool air. The
highly heated air conveyed through the passages crossing the escape flue and the air
heating chamber within the flame does not come in contact with the burner or tip, but
is thrown upon the flame at a point above the tip.
In the drawings: :―
Fig. 1, shows a lamp partly in elevation and partly in vertical section, embodying
my improved construction.
Fig. 2, shows a plan of the gas burner below the line u, v, and Fig. 3, a cross section
on the line X, Y, of the air cross tubes.
Fig. 4, shows a modification of certain details.
In Fig. 1, C, is an annular gas burner shown as consisting of two eccentric cylinders
filling in the ring G₁, which is attached to the central gas supply pipe by three arms g.
This part of the lamp may be constructed of a ring of tubes if desired, and the gas may
burn from perforations or a slit located either on the top of the burner as shown in
Fig. 1, or around its periphery at its upper end as shown in Fig. 4.
In suspended lamps it is preferable, on account of compactness and cheapness of
construction, to carry the gas supply pipe G, up through the center of the burner and
escape flue, but this pipe may enter the burner at or near its lower end at the sides or
directly from below. When a center suspension pipe is used, the stop cock S, may be
placed in the position shown.

page_text: The burner is preferably surrounded by an air casing D, to deflect air upon the
flame on its under side at the root, and insures the cooling of the tip. This casing may
be supported by the shell E³, which is perforated at its upper end to admit a further
amount of air upon the lower side of the flame.
Above the burner tip there is arranged a circular deflector b, which serves to divide
and direct the currents of air passing up through the center of the burner, and passing
down through the air heating chamber A. This deflector need not be a separate piece
but may be formed by the lower surface of the perforated metal piece a, as shown in
Fig. 4.
The air to supply the interior of the flame is admitted through passages r, which are
arranged across the escape flue. From the passages it passes downward into a
chamber A, located within the flame from the lower end of which it issues upon the
flame, preferably through a number of fine apertures, such as is provided by a suitably
shaped piece a, of perforated metal.
The cross air passages and the outer and inner walls of the escape flue are preferably
cast in one piece and the whole structure may be designated to distinguish it from the
air chamber A, the regenerator. This is shown in vertical section at R, in Fig. 1, and
in cross section in Fig. 3.
A downward cylindrical extension R³, serves to continue the air channel down to the
air chamber A. This latter being with the flame is preferably constructed of a
material having a white reflecting surface, such as porcelain, though it may be made of
motal provided with a whitened surface.
The flame is enclosed in a glass globe H, which may rest as shown, upon a
cylindrical casing E², by means of three off sets o, the bead upon the lower end of E2,
being cut away in three points to allow E, to be removed for taking off the glass.
To protect the glass from the heat of the flame, the opening of the escape flue
is arranged some distance inward from the edge of the globe and a current of
air is allowed to enter between the neck of the globe and the wall J, of the escape flue,
which serves the keep the globe neck cool and to aid in sweeping the tips of the
flame inward away from the glass and into the escape flue.
A casing I, surrounding the regenerator serves to protect the ends of the cross
passages r, from draughts.
H', is the chimney, H³, a sheathing which may be of ornamental design, and P, an
ornamental crown.
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. The combination of an annular burner having an air passage through it, which
passage communicates with the external air at its lower end, an air heating
chamber located above the burner tip and having an outlet for air at its lower end and
an inlet for air at its upper end, an air passage or channel leading across the escape flue
and communicating with the upper end of the air heating chamber, an enclosing
globe, an escape flue, the inlet end of which surrounds the upper end of the air heating
chamber, and an air passage between the wall of the escape flue and globe, substantially
as specified.
2. The combination of an annular burner having an air passage through it, which
passage communicates with with the external air at its lower end, a deflector arranged
above the burner tip, an air heating chamber located above the deflector, and having
an outlet for air at its lower end and an inlet for air at its upper end, an air passage or
channel leading across the escape flue and communicating with the upper end of the
air heating chamber, an enclosing globe, an escape Hue, the inlet end of which
surrounds the upper end of the air heating chamber, and an air passage between
the wall of the escape flue and globe, substantially as specified.
3. The combination of an annular burner having an air passage through it and an
air casing around it, both of these passages communicating with the external air at
their lower ends, an air heating chamber located above the burner tip, and having
an outlet for air at its lower end and an inlet for air at its upper end, an air

page_text: passage or channel leading across the escape flue and communicating with the
upper end of the air heating chamber, an enclosing globe, an escape flue, the
inlet end of which surrounds the upper part of the air heating chamber, and an
air passage between the wall of the escape flue and the globe, substantially as
specified.
4. The combination of an annular burner, having an air passage through it, which
passage communicates with the external air at its lower end, a central gas suspension
pipe, an air heating chamber surrounding the central gas pipe and located above the
burner tip, said chamber having an outlet for air at its lower end and an inlet for air
at its upper end, an air passage or channel leading across the escape flue and communi-
cating with the upper end of the air heating chamber, an enclosing globe, an escape
flue, the inlet end of which surrounds the upper part of the air heating chamber, and an
air passage between the wall of the escape flue and the globe, substantially as specified.
5. The combination of a burner having an air passage through it conveying air
upwardly to the interior of the flame, an air passage leading across the line of the
escaping products of combustion and conveying air downwardly to the interior of the
flame, an escape flue, an enclosing globe, and an air passage leading to and opening
into the globe, at or near its top, substantially as specified.
6. The combination of a burner having an air passage through it conveying air
upwardly to the interior of the flame, an air passage leading across the line of the
escaping products of combustion and conveying air downwardly to the interior of the
flame, a deflector located above the burner tip, an escape flue, an enclosing globe,
and an air passage leading to and opening into the globe at or near its top, substantially
as specified.
7. The combination of a burner having an air passage through it conveying air
upwardly to the interior of the flame, an air passage leading across the line of the
escaping products of combustion and conveying air downwardly to the interior of the
flame, an air passage surrounding the burner conveying air upwardly to the outside of
the flame, an escape flue, an enclosing globe, and an air passage leading to and
opening into the globe at or near its top, substantially as specified.
8. The combination of a burner having an air passage through it conveying air
upwardly to the interior of the flame, an air passage leading across the line of the
escaping products of combustion and conveying air downwardly to the flame, an air
passage surrounding the burner conveying air upwardly to the outside of the flame, a
deflector located above the burner tip, an escape flue, an enclosing globe, and an air
passage leading to and opening into the globe at or near its top, substantially as specified.
9. The combination of a burner having an air passage through it, which passage
communicates with the external air at its lower end, an air heating chamber located
above the burner tip and having an outlet for air at its lower end and an inlet for air at
its upper end, an air passage or channel leading across the escape flue and communi-
cating with the upper end of the air heating chamber, an enclosing globe, and an
escape flue, the inlet end of which surrounds the upper part of the air heating chamber.
10. The combination of a burner having an air passage through it, which passage
communicates with the external air at its lower end, a deflector located above the burner
tip, an air heating chamber located above the deflector and having an outlet for air at
its lower end and an inlet for air at its upper end, an air passage or channel leading
across the escape flue and communicating with the upper end of the air heating
chamber, an enclosing globe, and an escape flue, the inlet end of which surrounds the
upper part of the air heating chamber.
11. The combination of a burner having an air passage through it, and an air
casing around it, both of these passages communicating with the external air at their
lower ends, an air heating chamber located above the burner tip and having an outlet
for air at its lower end and an inlet for air at its upper end, an air passage or channel
leading across the escape flue and communicating with the upper end of the air heating
chamber, an enclosing globe, and an escape flue, the inlet end of which surrounds the
upper part of the air heating chamber.

page_text: 12. The combination of a burner having an air passage through it, and an air casing
around it, both of these passages communicating with the external air at their lower
ends, a deflector located above the burner tip, an air heating chamber located above
the burner having an outlet for air at its lower end and an inlet for air at its upper end,
an air passage or channel leading across the escape flue and communicating with the
upper end of the air heating chamber, an enclosing globe, and an escape flue, the
inlet end of which surrounds the upper part of the air heating chamber.
Dated this 17th day of August 1886.
HERBERT J. ALLISON,
Agent for the Applicant.