IMPROVEMENTS IN LAMPS
Year: 1884

page_text: I THOMAS COOPER JOHN THOMAS, of N° 54 Minories, in the County of
Middlesex, Engineer, do hereby declare the nature of said invention for
"IMPROVEMENTS IN LAMPS " to be as follows:-
One object of my invention is to enable trimming of a lamp to be readily
effected without its being necessary for this purpose to remove the chimney from
its holder or supporting gallery. I provide above the oil reservoir or tank a
hinged or removeable upper plate to which are secured the burner cone and also
a gallery or holder for supporting tho chimney. Between the upper plate and the
top of the reservoir or tank is a space for air to support combustion at the burner.
The chimney holder secured to the upper plate is, according to one arrangement, in
the form of a metallic tube or part tube with an opening or slot of a width greater
or less according to the lateral range of light required. The glass chimney may
surround this tubular holder (which itself forms a chimney) or may be placed
within it and be itself shorter than the tubular holder.
In order to feed a lamp with air admitted at the head and to ensure efficient
circulation to promote combustion even in calin weather, I provide in the outer
casing of the lamp head inlets for air and separate therefrom outlets for heated
gases or products of combustion. In lieu of a cap closed at the top,such as is used
in some lamps, and into the lower part of which the upper part of the chimney
enters, I use, above the chimney, a pipe or supplementary chimney, of which the
lower portion may be enlarged in a conical or other form, and is situate somewhat
above the top of the chimney proper. Above the upper end of this pipe is a cap so
arranged that heated air and products of combustion passing up the pipe may
escape between it and the cap, which, however, is so arranged as to prevent down
draught,
To ensure downward flow of air that enters from without so that it may travel
towards the burner to support combustion, without impediment from the heated
air and products of combustion rising within the lamp, I provide an inner casing or
casings between the pipe already mentioned and the outer casing of the lamp head
so as to provide.a separate channel or passage or channels or passages for incoming
air to flow in a downward direction.
External wind guards are provided to the inlet and outlet openings of the lamp
head casing.
My invention as above set forth may be applied either in whole or in part to
lamps of various kinds,

page_text: •
I, THOMAS COOPER JOHN THOMAS, of 54 Minories, in the County of Middlesex,
Engineer, do hereby declare the nature of my said invention for "IMPROVEMENTS
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
IN LAMPS
One object of my invention is to enable trimming of a lamp to be readily effected
without its being necessary for this purpose to remove the chimney from its holder
or supporting gallery.
I provide above the oil reservoir or tank a hinged or removable upper plate to
which are secured the burner cone and also a gallery or holder for supporting the
chimney. Between the upper plate and the top of the reservoir is a space for air
to support combustion at the burner. The chimney holder secured to the upper
plate is according to one arrangement in the forin of a metallic tube or part tube
with an opening or slot of a width greater or less according to the lateral range of
light required. The glass chimney may surround this tubular holder (which itself
forms a chimney) or may be placed within it and be itself shorter than the tubular
bolder.
In order to feed a lamp with air admitted at the head and to ensure efficient
circulation to promote combustion even in calin weather, I provide in the outer
casing of the lamp head inlets for air and separate therefrom outlets for heated
gases or products of combustion. In lieu of a cap closed at the top such as is used
in some lamps, and into the lower part of which the upper part of the chimney
enters, I use above the chimney a pipe or supplementary chimney, of which the
lower portion may be enlarged in a conical or other form, and is situate somewhat
above the top of the chimney proper.
Above the upper end of this pipe is a cap so arranged that heated air and
products of combustion passing up the pipe may escape between it and the cap,
which, however is so arranged as to prevent down draught.
To ensure downward flow of air that enters from without so that it may travel
towards the burner to support combustion, without impediment from the heated
air and products of combustion rising within the lamp, I provide an inner casing or
casings between the pipe already mentioned and the outer casing of the lamp head
so as to provide a separate channel or passage or channels or passages for incoming
air to How in a downward direction.
External wind guards are provided to the inlet and outlet openings of the lamp
head casing.
My invention as above set forth may be applied either in whole or in part to
lamps of various kinds.
In the accompanying sheet of illustrative drawings Fig 1 is a central vertical
section of a lamp according to my invention and Fig -2 is a front view of one
form of oil reservoir or tank and attached parts, employed in the same.
.
a is the oil tank or reservoir provided with a hinged or removable upper plate b
pivotted to the tank a at b*. To the plate b are secured the burner cone 6¹ and
also a holder c for supporting the chimney e. Between the upper plate b and the
top a¹ of the reservoir or tank a is a space a² for air to support combustion at the
burner. The chimney holder c is, according to the arrangement shown, in the form
of a metallic tube or part tube with an opening or slot cl of a width greater or less
according to the range of light required. A glass chimney e surrounds the tubular

page_text: holder c, (which in itself forms a chimney). f. f are holes in the upper extended
sides of the tank or reservoir a to admit of air passing to the space a', whilst g. g
are holes in the lower portion of the chimney holder c to admit air to the exterior
of the burner cone 6¹. By the arrangement just described it will be obvious that
access can be had to the burner for trimming the lamp or other purpose, by simply
raising the upper plate b without its being necessary to separately remove either
the chimney or the burner cone.
Fig 3 illustrates in vertical section a modification wherein the hinged or removable
upper plate or cover b is provided with a circular holder c* adapted to carry an
ordinary glass chimney e*.
h (Fig 1) is the outer casing of the lamp head provided with inlets & for air, and
separate therefrom, outlets ; for heated gases or products of combustion. is the
pipe or supplementary chimney of which the lower portion k¹ is enlarged in a conical
forn and is situate somewhat above the top of the chimney of the lamp proper.
I is a cap so arranged and supported that heated gases or products of combustion
passing up the pipe k may escape between it and the cap, which however is so
arranged as to prevent down draught. m is an inner casing (of which there may
be more than one) arranged between the pipe k and the outer casingh of the lamp
head so as to provide a separate channel or passage m³ (or channels or passages) for
incoming air to flow in a downward direction to the lamp proper. n n¹ are wind
guards provided to the inlet and outlet openings ij respectively of the lamp head
casing.
By the means just described the lamp proper is fed with air and efficient circula-
tion thereof to promote combustion may be ensured.
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. Providing above the oil reservoir or tank of a lamp, a hinged or removable
upper plate, to which are secured both the burner cone and a gallery or holder of
any convenient kind for supporting the lamp chimney, so that access can be had to
the burner for trimming the lamp or other purpose, by simply raising the upper
plate without its being necessary to separately remove either the chimney or the
burner cone substantially as herein before described.
2. The improved construction of chimney holder substantially as herein before
described with reference to and shown in the drawings Figs 1 and 2.
3. In a lamp head provided with inlets for air, and separate therefrom, outlets
for heated gases or products of combustion the use, in conjunction with the lamp
chimney proper, of a pipe or supplementary chimney, such as k, a cap, such as
placed above the upper end of the pipe or supplementary chimney k and an inner
casing m (or casings) situate between the pipe or supplementary chimney k and the
outer casingh of the lamp head, so as to provide a separate channel or passage (or
channels or passages) for incoming air to flow in a downward direction substantially
as described,
4. The improved lamp, constructed, arranged, and operating substantially as
hereinbefore described with reference to Figs 1 and 2 of the drawings.
100
1