Year: 1887

page_text: Date of Application, 22nd Jan., 1887.
Specification Accepted, 22nd Feb., 1887.
HENRY HUTCHINSON Metalurgical Chemist 90 Cannon Street City of London
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:
27
I am aware that the Regenerative principle as applied to Gas Lamps wherein, the
air necessary to support combustion is previously heated by the waste heat from the
burner, is not new, having been well known for many years, as demonstrated by
Farraday and later by such lamps as the "Wenham" "Bower "Fourness"
"Clark and others, my object in the present invention being to, so simplify the con-
struction, and arrangement of the essential parts of a Regenerative gas lamp, as first
to cheapen the manufacture thereof, and secondly to remedy the defects which have
more or less affected that class of lamp hitherto, viz: the tendency to choke at the
burning point, and to smoke, or otherwise to get out of order. For this purpose I
construct a lamp (as shewn in Fig. 1 of the annexed drawings) of any size, shape, or
material, having a dome or body A A to which at the opening at top is attached a
conically shaped flue pipe B-surrounding this opening I make a convenient number
of holes preferably six, into which 1 insert an equal number of air tubes L L, which
are of a double conical shape (as shewn in Fig. 2) these tubes at their lower ends are
fitted to a generator C which is divided at N and fitted with a triangle O and screwed
for convenience in fixing together or taking apart-through the upper part of the
generator a gas supply pipe E fits air tight, and is carried through to meet the
Burner F which is screwed thereon-surrounding the burner is a divided plate, which
rests upon a circular rebate-attached to the burner is a disc G, which being adjusted
to its position deflects the downward current of air up to the under surface of the
flame, surrounding the generator and at a convenient distance therefrom is a circular
deflector H. H. fitting tightly to the dome or upper part of the lamp, the object of
which is to sharpen the current of the escaping products of combustion, and to give
shape to the flame-the upper dome at or near the point where the deflector is fixed,
is pierced with a convenient number of holes about 1/8th of an inch in diameter, I
find 30 of these answer the purpose of admitting a sufficient quantity of air, which

page_text: descends to the lower part of the lamp, and when heated rises to the flame-The
lower part of the lamp is fitted with a glass J attached to the upper part of the lamp
by a hinged ring or any well known contrivance. I find it convenient to place à
gauze at or near D D inside the generator to break up the currents of air from the
conical tubes the burner F may be a slit-ring or Argand burner, preferably the
latter in the case of a bracket lamp the gas may be carried in at about the line of
KK as in Fig. 3-The action of tlie lanip is as follows-when the gas is lit, the fluc
pipe becomes warmed and a sharp up draught is induced, the glass door being closed,
there is no inlet for the air to burner except through the conical pipes and circular
holes, and as these are submitted to the direct heat of the flame, the air becomes
heated to a high temperature, and intensifies the light-the conical form of the flue
enables the products of combustion to escape without friction, and thus induces a
sharp exhaustive draught upon the escaping products of combustion, and also upon
the downward draught of cold air in the conical air tubes-the conical form of the
latter causing them to act as Injectors of air into the generator, which latter from its
peculiar form takes up the greater part of the heat from the flame direct, and com-
municates it to the air injected into it by these means the process of heating the
air, together with combustion, is practically instantaneous, preventing the decomposi-
tion of the gas before it reaches the flame, which has hitherto been the cause of
choking in this class of lamp burners by prolonged heat.
I also adapt the improved lamp to the purpose of street lighting in the ordinary
street lamps without the necessity of a special lamp to receive it (as shown in Fig. 3)
-wherein the upper part of an ordinary lamp is removed and an iron or other plate
fitted to the shoulder, with a circular hole sufficient to let in the lamp, in this case the
gas may be conveniently supplied at the side as at KK-where the glazing of street
lamps can be conveniently made airtight, the semi-circular glass I dispense with-
For protection against varying currents of air I surround the air tubes with an
ornamental ring or rings KK Fig. 1 and about half way in this I place a circular
piece of small mesh gauze-and further I place a circular shield over the air holes in
the dome of the lamp before referred to-on the lines of M M Fig. 1.
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
First The combination of parts arranged substantially as shewn in the annexed
drawings with reference to Figs. 1-2 and 3.
Second-In Regenerative Gas Lamps the use of a conical flue pipe, and conical
air injectors substantially as shewn in Figs. 1-2 and 3 of the annexed drawings.
HENRY HUTCHINSON.