IMPROVEMENTS IN GAS LAMPS
Year: 1884

page_text: I, THOMAS COOPER JOHN THOMAS, of No 54 Minories, in the County of
Middlesex, Engineer, do hereby declare the nature of said invention for
"IMPROVEMENTS IN GAS LAMPS" to be as follows:-
This invention has reference to gas lamps in which the burners are inverted and
the flames are projected downward and laterally.
In such lamps as heretofore usually made the construction has been more or less
complicated and the burners used have been of the argand or some similar type
with a central or inner air supply within the annular flame as well as an outer air
supply surrounding the same.
Now the object of my invention is to produce an efficient lamp of simple con-
struction that may be made at moderate cost and wherein a high illuminating
effect may be economically obtained.
The burner is in the form of a tube closed at its lower end and having lateral
perforations for the issue of gas. Conveniently the burner tube may be made
separate from the gas supply pipe, and be screwed thereon as an inverted cap-
Surrounding the burner is a curtain or deflector extending downward somewhat
below the lateral holes of the burner, in such manner that the gas jets issuing
therefrom are caused to take a downward direction. Around the gas supply pipe
is a pipe or casing closed at its top and furnished with a gauze or perforated
diaphragm or diaphragms. This constitutes a chamber through which air to support
combustion is caused to pass and wherein the temperature of such air is raised as
it flows towards the burner. The air is admitted to the said air heating chamber
by inlets near the upper part thereof. The air heating chamber is surrounded by
a chimney that extends above it, the arrangement being such as to leave an
annular passage between the exterior of the air heating chamber and the interior
of the chimney for the escape of products of combustion.
Below the burner is a bowl or glazed chamber the upper portion of which is
closed by a top or cover whose under surface forms a reflector. A portion of this
top or cover near the circumference may with advantage take an upward direction,
and be perforated to admit air to aid in supporting combustion.
The details of construction however, are obviously susceptible of modification
without departure from essential features of my invention above set forth.
Dated this 1st dor of A vonat 1824
W. LLOYD WISE,.
Applicant's Agent.

page_text: I, THOMAS COOPER JOHN THOMAS, of 54 Minories, in the County of
Middlesex, Engineer, do hereby declare the nature of my invention for
" IMPROVEMENTS IN GAS LAMPS" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:—
This invention has reference to gas lamps in which the burners are inverted and
the flames are projected downward and laterally.
In such lamps as heretofore usually made the construction has been more or less
'complicated and the burners used have been of the argand. or some similar type
with a central or inner air supply within the annular flame as well as an outer air
supply surrounding the same.
Now the object of my invention is to dispense with a central air supply and to
produce an efficient lamp of simple construction that may be made at moderate
cost and wherein a high illuminating effect may be economically obtained.
The burner is in the form of a tube closed at its lower end and having lateral
perforations for the issue of gas. Conveniently the burner tube may be made
separate from the gas supply pipe, and be screwed thereon or therein as an inverted
.cap. Surrounding the burner is a curtain or deflector extending downward some-
'what below the lateral holes of the burner in such manner that the gas jets issuing
therefrom are caused to take a downward direction. Around the gas supply pipe
is a pipe or casing closed at its top and furnished with a gauze or perforated
diaphragm or diaphragms. This constitutes à chamber through which air to
support combustion is caused to pass and wherein the temperature of such air is
raised as it flows towards the burner. The air is admitted to the said air heating
'chamber by inlets near the upper part thereof. The air heating chamber is
surrounded by a chimney that extends above it, the arrangement being such as to
leave an annular passage between the exterior of the air heating chamber and the
interior of the chimney for the escape of products of combustion.
Below the burner is a bowl or glazed chamber the upper portion of which is
.closed by a top or cover whose under surface forms a reflector. A portion of this
top or cover near the circumference may with advantage take an upward direction
.and be perforated to admit air to aid in supporting combustion.
The details of construction however, are obviously susceptible of modification
without departure from the essential features of my invention above set forth.
In the accompanying sheet of illustrative drawings Fig 1 is a vertical section of
a gas lanp embodying my invention and Fig 2 is a plan or top view of the same
'the outer lamp case and upper part of the lamp chimney being removed.
!
a is a burner closed at its lower end and 6 is a burner tube or gas supply pipe
into which the burner is screwed. a¹ a¹ are lateral holes in the burner for the
issue of gas and c is a curtain or deflector surrounding the burner and extending
downward to cause the gas issuing from the burner to take a downward course.
The burner a is shewn as being externally of a trumpet mouth form according to an
invention described in my specification N° 883 A.D. 1885, but it is to be under-
stood that although I now show the burner so formed because I deem it advan-
tageous to make it so in a lamp of the kind herein described yet I do not claim
'

page_text: such formation of the burner as constituting any part of my present invention.
d is a pipe or casing closed at its top and constituting a heating chamber for air
flowing towards the burner and e. e are inlets to this chamber. d' d' are gauze
diaphragms serving to break up the current of inflowing air and insure its being
thoroughly heated. f is a chimney and f' an annular space between it and the
exterior of chamber d for the escape of products of combustion. g is a transparent
or translucent bowl forming a combustion chamber and h is a top or cover for the
same the under surface of which is made to form a reflector.
I consider it advantageous to arrange the chimney f to surround only the upper
portion of the wall of the air heating chamber d and make and arrange the
reflecting top or cover h of the bowl or chamber g so that it surrounds the lower
portion of the air heating chamber d as shewn, but I do not claim such arrange-
ment as part of my present invention because the same forms part of another
invention described in my specification N° 883 A.D. 1885. i. i are openings in the
top or cover h to admit air, entering through the holes j. in the case k, to the
bowl or combustion chamber g to aid in supporting combustion. The air which
enters the chamber d by the inlets e is also admitted through the holes j in the
case k
Air entering the bowl or combustion chamber g through the inlets i as described
will assist in causing the gas dame to assume approximately a trumpet mouth
form such as indicated in dotted lines.
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. In a gas lamp the use of an inverted burner or tube closed at its lower end,
formed with lateral openings for the issue of gas and provided with a surrounding
curtain or deflector such as c substantially as herein before described.
.2. In a gas lamp the use of an inverted burner without central air inlet in
conjunction with an inlet or inlets for admission of air around the burner in such a
manner that the air so admitted shall immediately surround and impart a down-
ward direction to the flame issuing from the burner substantially as described.
3. In a gas lamp the use of an inverted burner without central air inlet, an inlet
or inlets to admit air iminediately around the burner in such manner that this air
shall surround and impart a downward direction to the flame; an inlet or inlets to
admit air at or near the circumference of the reflector or cover of the chamber in
which the flame burns so that such air shall impart an outward and upward
direction to the flame, and an exit or exits for escape of products of combustion
between the said air inlets substantially as described.
4. A gas lamp comprising an inverted burner with closed lower end, lateral holes
for issue of gas, a surrounding curtain or deflector such as c, an air supply
chamber d with diaphragm or diaphragms d', air inlets i, chamber g and exit f¹
for products of combustion, substantially as described.
Dated this 28th day of April 1885.
T. C. J. THOMAS.
W. Lloyd Wise,
46, Lincoln's Inn Fields,
Applicant's Agent.