Improvements in or relating to Street Gas Lamps.
Year: 1899

page_text: Date of Application, 27th Oct., 1899
Complete Specification Left, 3rd May, 1900-Accepted, 9th June, 1900
PROVISIONAL DITUTIO
Improvements in or relating to Street Gas Lamps.
I, JAMES JACKSON, of 27, Regent Terrace, Hyde Park Road, Leeds, in the
County of York, Assistant Superintendent in the Gas Lighting Department of
the Leeds Corporation, do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in street gas lamps; and its object
is to provide a gas lamp adapted for use with incandescent mantles and burners
in which the gas may be ignited from the outside of the lamp or lantern
without the torch entering the same, and at the same time provision to prevent
an inrush of air down the chimney. Further the products of combustion may
be carried away without entering the interior proper of the lamp or lantern,
and means are provided for preventing any direct current of air entering the
lamp or lantern thereby causing an up or down current within the same.
According to this invention the exterior of the lamp or lantern, hereafter
termed the lantern, is of the usual shape and construction, that is to say a
metal framework in the form of, say, two truncated pyramidical or other cones
of the same or varying sizes placed with their bases towards each other, or
provided with any desired number of sides or angles, such as, say, four, or
Each side or portion,
six, or the like, which are glazed in the usual manner.
or each alternate side or portions of the lantern may be hinged at its top for
cleaning and other purposes, as well as for providing an easy access to its
interior. The bottom of the lantern may be practically closed to the interior
except at the points where one or more, say, two, flexible or other gas supply
pipes pass through it to the burners. The top of the lantern may be made as
ornamental as desired and provided with any desired number of rows of per-
forations of suitable shape and configuration for the admission of air, and for
the exit of the products of combustion. Also, if so required, the top of the..
lantern may terminate in a cowl for ventilation purposes, so arranged as to
prevent any direct current of air entering the lantern.
Any desired number, say, one, two, three, or more, of incandescent burners,.
galleries, chimneys, and mantles, all of the usual and ordinary construction
are mounted upon any suitable arrangement of anti-vibrator capable of being
suspended from the top of the lantern, and to permit of each burner being
separately connected to the branch of the ordinary supply pipe, which may or
may not be armed with separate taps or cocks for each burner.
In order to ignite each burner separately, and without passing the torch into
the lantern, within the top of the lantern may be fixed an inner lining or cas-
ing of the same shape as but smaller than the inner contour of the top, so that
when fixed in position there is an annular or other space between it and the
inside of the top. The inner lining is made to extend a suitable distance above
the upper row of ventilation holes in the top, as well as to project a suitable

page_text: distance below the lowest row of air inlet holes in the same, but above the top
or tops of the chimney or chimneys of the burner or burners.
To the inside of the inner lining is also fixed a chimney or tube for carrying
away the products of combustion from each burner and mantle without allow-
ing it to pass within the lantern. The said tube is made of such a length as
to permit the top of the chimney of the burner to pass easily within it, whilst
the upper portion of the tube is so arranged as to be at a suitable distance from
but opposite to an opening specially provided for it in the top of the lantern.
Each of the openings provided in the top of the lantern for the said tubes is
closed or covered by a weighted door or lid hinged at its top to the outside of
the lantern to prevent an inrush of air down the chimney to the burner, and
the said lids are so arranged as to be capable of being opened with the igniting
torch.
A reflector may be fixed within the lantern between the burner or burners
and the base of the inner lining arranged to permit of the free passage of the
air from the inlet holes to the burner or burners, thereby aiding in keeping
the opal glass and side panes perfectly cool.
In gas lamps, arranged as herein described, the products of combustion are
earried away by the tubes, with which the chimneys of the burners are in
communication,-into the annular or other space between the inside of the
top of the lantern and inner lining and out through the ventilation holes and
cowl without passing into the inside of the lantern below the réflector. And
by making the inner lining as described an up and down draught is practically,
if not entirely, obviated.
Dated this Twenty-sixth day of Ontahan
1000
Improvements in or relating to Street Gas Lamps.
I, JAMES JACKSON, of 27, Regent Terrace, Hyde Park Road, Leeds, in the
County of York, Assistant Superintendent in the Gas Lighting Department of
the Leeds Corporation, 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 improvements in the lanterns of street gas lamps,
in which incandescent, Argand, or other burners provided with glass chimneys
are used.
Hitherto this class of lantern has been so constructed as to require the torch
to be inserted through a hinged door or doors into a gas ignition chamber
arranged within the lantern. Or when the gas has been ignited from the
outside of the lantern it has been collected as it passes from the glass chimney
by means of a spoon-shaped or inverted hopper from which it passes to a tube
and is then conveyed to the point of ignition on the outside of the lamp. In
this latter arrangement little or no provision is made for preventing an inrush
of air down the chimney of the burner.
The object of this invention is to provide a gas lantern adapted for use with
incandescent mantles and burners as well as Argand or the like, in which the
gas may be ignited from the outside of the lantern without the torch entering
the same, and at the same time provision is made to prevent an inrush of air

page_text: down the chimney. Further, the products of combustion may be carried away
without entering the interior proper of the lantern, and means are also pro-
vided for preventing any direct current of air entering the lantern thereby
causing an up or down current within the same.
According to this invention a glazed lantern of ordinary shape and con-
struction is provided with an inner lining or casing from the inner side of
which a chimney or tube is made to descend on to the glass chimney of each
burner. A separate chimney or tube is employed for each burner for carrying
away the products of combustion into an annular space between the inner lining
and top of the lantern, and to pass out therefrom through its cowl. An opening
or orifice is formed in the outer portion of the lantern immediately opposite
to each of said chimneys or tubes for ignition purposes, the said opening or
tube being closed on the outside by a weighted door or flap hinged to the lantern.
In the drawings hereunto annexed is shown a lantern constructed according
to this invention, in which
Fig. 1, is a sectional elevation.
Fig. 2, an elevation drawn at a right angle to Fig. 1.
A is the lantern, the exterior of which is of the usual shape and construction,
that is to say, a metal framework in the form of, say, two truncated pyrami-
dical or other cones of the same or varying sizes placed with their bases towards
each other, or provided with any desired number of sides or angles, such as,
say, four, or six, or the like. The metal framework is rabbetted or otherwise
grooved for the reception of the panes B B¹ of glass for glazing the lantern in
the usual manner. Each side or portion, or each alternate side or portions of
the lantern may be hinged at its top C for cleaning and other purposes, as
well as for providing an easy access to its interior, the hinged portion being
retained at its bottom by any suitable catch. The bottom D of the lantern may
be practically closed to the interior except at the points E where one or more,
say, two, flexible or other gas supply pipes F pass through it to the burners G.
The top of the lantern may be made as ornamental as desired and is provided
with any desired number of rows of perforations k k of suitable shape and con-
figuration for the admission of air, and for the exit of the products of combus-
tion. In some cases, such as when used in places liable to cross-currents or
gusts of wind, I have found by experiment that it is advantageous to dispense
with the ventilation holes k, retaining only the row . Also, when the top of
the lantern terminates in a cowl K for ventilation purposes, it is so arranged as
to prevent any direct current of air entering the interior of the lantern.
Any desired number, say, one, two, three, or more, of incandescent burners G,
galleries H, chimneys I, and mantles J, all of the usual and ordinary construc-
tion are mounted upon any suitable and convenient arrangement of anti-
vibrator L capable of being suspended from the top of the lantern A and to
permit of each burner G being separately connected to the branch of the ordinary
supply pipe M, which may or may not be armed with separate taps or cocks N
for each burner. Although incandescent burners and mantles are shown and
described it will be readily understood that Argand or other burners may be
used in place thereof. But I prefer using incandescent burners and mantles.
All the above parts are of usual and ordinary construction, and I particularly
desire it to be distinctly understood that I make no claim to the use of the
anti-vibrator or to the incandescent burners and mantles, except when used
in combination with the hereinafter described arrangement of parts.
In order to ignite each burner G separately, and without passing the torch
into the interior of the lantern A, within the top of the lantern is fixed an
inner lining or casing of the same shape as but smaller than the inner contour
of the top, so that when fixed in position there is an annular or other space 01
between it and the inside of the top. The inner lining 0 is made of metal and
it is arranged to extend a suitable distance above the upper row of ventilation
holes in the top, as well as to project a suitable distance below the lowest

page_text: row of air inlet holes in the same, but above the top or tops of the chimney
or chimneys I of the burner or burners G.
To the inside of the inner lining is also fixed a metal chimney or tube herein-
after termed the tube P for carrying away the products of combustion from
each burner and mantle without allowing it to pass within the lantern. The
tube P is made of such a length as to permit the top of the chimney I of the
burner to pass easily within it, whilst the upper portion of the tube P is so
arranged as to be at a suitable distance from but opposite to an opening or
orifice specially provided for it in the top of the lantern. Between the inner
lining O and top K of the lamp and opposite to each opening Q is fixed in the
annular space a semi-circular piece of metal R to form a cover for directing
the products of combustion as they escape from the tube P to pass into the
annular space O₁ and out of the lantern at the top of the cowl K instead of
passing direct to the opening Q. The cover R also protects the tube P and
burners G from an inrush of air entering the lantern through the aperture at
the top of the cowl K or through the ventilation holes k.
Each of the openings Q provided in the top of the lantern for the said.
tubes P is closed or covered by a door or lid S hinged at its top to the outside
of the lantern, and weighted at its free and outer edge s, to prevent an inrush
of air down the tube P and chimney I to the burner. The said lids are so
arranged as to be capable of being opened with the igniting torch.
Instead of weighted door an equivalent such as a door closed by a spring
can of course be used, but to less advantage.
In the lower end of each tube P is provided a number of perforations T which
are partly closed by the covers T cut out of the main portion of the tube as
shown. These perforations provide a means of exit for pressure and products
of combustion caused by the explosion that takes place at every ignition of
the gas, thereby preventing damage to the mantle.
A reflector U may be fixed within the lantern between the burner or burners
and the base of the inner lining 0 arranged to permit of the free passage of
the air from the holes ¹ to the burner or burners, space being left between its
edges for this purpose, thereby aiding in keeping the panes of opal glass B¹
and side panes B perfectly cool.
In gas lamps, arranged as herein described, the products of combustion are
carried away by the tubes P, with which the chimneys I of the burners G are
in communication,-into the annular or other space O' between the inside of
the top of the lantern and inner lining 0, without passing into the inside
of the lantern below the reflector U. And by making the inner lining 0, as
described, an up and down draught is practically, if not entirely, obviated.
The above described parts, namely, the tubes P, communicating with the
opening Qin top of lantern, the inner lining 0, the semi-circular cover R,
hinged doors S and reflector U may be adapted and applied to the lanterns of
existing street lamps.
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. A lantern for street gas lighting purposes provided with an inner lining
of smaller size than, but of the same contour, as the top to which it is fixed
whereby an annular or other space is provided for the escape of the products
of combustion, said lining having fixed to its underside a number of pendant
tubes corresponding with those of the burners employed and in independent
communication at one end with the chimney of each burner and at the other
end with an opening, closed by a weighted door, (or its equivalent) in the top
of the lantern for igniting each burner separately, all of said parts being
arranged and combined substantially as herein set forth and illustrated.
2. In a lantern for street gas lighting such as herein described, the combina-

page_text: tion with the top of a lantern, of an inner lining O fixed to the top of the lan-
tern with a space between them, one or more pendant tubes P fixed at the upper
end to the said inner lining and each to communicate with an opening Qin
the top of lantern, and at the lower end to encircle the glass chimney I of the
burner, and a weighted door S (or its equivalent) hinged to the outside of the
top of lantern, all arranged as and for the purposes set forth.
3. The combination and arrangement of the various parts constituting the
lantern for street gas lighting purposes substantially as described and illus-
trated in the accompanying drawings.
Dated this in dow of 1000