Year: 1886

page_text: Date of Application, 6th Nov., 1886.
Specification Accepted, 7th Jan., 1887.
I, HERBERT JOHN ALLISON, of 52 Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention which has
been communicated to me from abroad by Charles M. Lungren, of the City, County
and State of New York, (114 Pearl St.) Civil Engineer, 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 improve the action and efficiency of regenerative
gas lamps, and the invention consists in certain combinations of parts resulting in a
novel organization and the attainment of a flame of high candle power for a
comparatively small expenditure of gas.
In the accompanying drawings:-
Fig. 1, is a vertical section of a form of lamp embodying my invention.
Fig. 2, shows in side elevation one form of burner that may be used in the lamp.
Fig. 3, illustrates a modified construction of the lamp.
Fig. 4, is a side elevation, and Fig. 5, a cross section of the portion of the lamp
constituting the regenerator or part that serves to heat the air supplied to the flame.
B, indicates an inverted gas burner provided at its lower end with openings for the
issuance of gas, as indicated. The burner is hung from a central gas supply pipe G,
and is surrounded by an air heating chamber F, through which the air to supply the
upper side of the flame and a portion of that to supply the outer surface of the flame
passes.
Air is introduced into the upper end of the chamber F, by means of passages R,
which cross the escape flue and which open into a common central space as indicated.
This portion of the lamp which may be termed the regenerator to distinguish it from
the air chamber F, is preferably cast in one piece and is formed as shown in elevation
in Fig. 4, and in cross section in Fig. 5.
Depending from the regenerator is a lip or flange to which the upper end of the

page_text: chamber F, is secured so that said chamber forms a continuation of the space or
chamber into which the cross passages R, open.
The gas pipe G, passes down through an opening formed in the regenerator as
indicated.
C, indicates a conical top or hood resting on the regenerator and formed with a
depending flange or lip extending down over the outer ends of the tubes R, but at
a distance from the ends thereof sufficient to permit air to pass up beneath the flange
and into the tubes. The hood C, rests on the regenerator R, as indicated. T, is the
top or closing plate of the lamp. It is formed of a vertical portion secured to the
regenerator and a horizontal portion perforated as indicated, to permit the ingress of
air into the space enclosed by the depending glass globe which latter is supported by
a metal ring fitting against or secured to the lower side of the horizontal portion of
the closing plate T. Secured to the plate T, so as to form a continuation of its
vertical portion, or cast in one piece therewith, is a plate P, preferably formed so as to
make an annular chamber or cavity into which the air passing through the horizontal
portion of the plate T, enters, from which space it enters the globe through an
opening between the upturned portion of the plate P, and the horizontal portion of
the plate T. The plate P, may be secured to the plate T, by screws as indicated; the
vertical portion of the plate T, together with the vertical inner portion of the plate P,
forming the outer wall for the lower portion of the
escape flue.
C¹, indicates the chimney resting upon the top of the hood or conical plate C, and
communicating with the upper portion of the escape flue.
C", indicates an ornamental casing surrounding the chimney, while S, is the stop
cock operated by chains as shown. The ring which supports the globe is shown
hinged to the plate T, but it might be supported by chains and counterbalanced, or be
hung by a bayonet joint.
The burner is preferably annular in form and may be constructed of concentric
shells having a space between them which communicates at its upper end with the
gas supply pipe. It is preferably constructed however of a ring of tubes slightly
separated from one another and all communicating with a chamber into which the gas
pipe G, opens.
The space between the burner and the lower end of the air chamber F, is closed by
a perforated disc M, by means of which the air is better distributed over the flame.
A part of the air entering the chamber F, is admitted to the central air
space
of the
burner through suitable perforations or through the spaces between the tubes making
up the burner, and passing down is deflected upon the under surface of the flame by
the button b, suitably supported in the position shown. This button is preferably
constructed of perforated metal, as the air is better distributed by this construction.
The deflecting surface H, formed on or attached to the lower end of the air
chamber F, the outer wall of said air chamber and the lower surface of the plate P,
are preferably whitened by any suitable means so as to form reflecting surfaces for
the flame.
With a lamp constructed as above described there is produced a sheet of flame of
the form of an inverted convolvulus of great intensity. It however, has a tendency
to redness at the ends due to an insufficient air supply at this part of the flame.
To remedy this I provide a further supply of air at the top of the globe as shown in
Fig. 1, or through the bottom as shown in Fig. 3. Air may however be admitted at
both points as shown in Fig. 3, on the right hand side.
It is desirable in admitting air into the top of the globe to have the passage well
protected so as not to interfere with the steadiness of the flame. To accomplish this
I allow the air to enter through perforations in the top plate T, into the annular space
in the plate P. From this space it passes into the globe through the narrow space
between the outer edges of the plate P, and the plate T.
In Fig. 3, the additional air is brought up through a tubular conduit and is
distributed upon the flame by impinging against the lower surface of the button b,
which is in this case solid. The right of the figure shows the admission of air both
at the bottom and top of the globe.

page_text: 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 inverted gas burner having downwardly directed
orifices for the emission of gas at its lower end, an air chamber surrounding the
burner, said chamber having an outlet for air at its lower end and connected at its
upper end to an air conduit leading to it from the outer air across the escape flue, an
escape flue the lower end of which surrounds the upper end of the air chamber, an
enclosing globe, and air inlets arranged between the outer edge of the globe and the
escape flue, substantially as specified.
2. The combination of an inverted annular gas burner having downwardly directed
orifices for the emission of gas at its lower end, and a deflecting button beneath its
lower end, an air chamber surrounding the burner, said chamber having an outlet
for air at its lower end and connected at its upper end to an air conduit leading to it
from the outer air across the escape flue, an escape flue the lower end of which
surrounds the upper part of the air chamber, an enclosing globe, and air inlets
arranged between the outer edge of the globe and the escape flue, substantially as
specified.
3. The combination of an inverted annular gas burner having downwardly directed
orifices for the emission of gas at its lower end, an air chamber surrounding the
burner, said chamber having attached to its lower end a flame director, and being
connected at its upper end to an air conduit leading to it from the outer air across the
escape flue, an escape flue the lower end of which surrounds the upper part of the air
chamber, an enclosing globe, and air inlets arranged between the outer edge of the
globe and the escape flue, substantially as specified.
4. The combination of an inverted annular gas burner composed of a ring of tubes
open at their lower ends for the emission of gas, an air chamber surrounding the
burner, said chamber having an outlet for air at its lower end and being connected at
its upper end to an air conduit leading to it from the outer air across the escape flue
the lower end of which surrounds the upper part of the air chamber, an enclosing
globe, and air inlets arranged between the outer edge of the globe and the escape flue,
substantially as specified.
5. The combination of an inverted burner having openings for the emission of gas
in a downward direction, an air chamber surrounding the burner, said chamber having
an outlet for air at its lower end and connected at its upper end to an air conduit
leading to it from the outer air across the escape flue, an escape flue the lower end of
which surrounds the upper part of the air heating chamber, an enclosing globe, and
air passages admitting air either into the top or bottom of the globe or both.
ALLISON BROS.,
Agents for the Applicant.