IMPROVEMENTS IN GAS LAMPS
Year: 1885

page_text: I JAMES ROOTS of 25 The Avenue Tottenham Engineer do hereby declare the
nature of my invention for IMPROVEMENTS IN GAS LAMPS to be as follows :—
The object of this invention is the improvement of the light in a gas lamp by
supplying the flame with heated air, the outgoing products of combustion heating
the incoming air and thus intensifying the light by perfecting the combustion.
In an ordinary street or other lamp the lamp is divided into two compartments the
upper or air heating chamber and the lower or lighting chamber. The reflector
may form the division having the lower end of the chimney attached at its centre.
The air entering through perforations in the top of the lamp near the chimney wall,
passes along the upper surface of the heated reflector to the burner or burners
which are of the flat flame type and which project inward through the reflector a
short distance thus directing their flames toward the centre. The air for one or
more burners may be carried down by tubing from above the flame, the tubing
thus forms an air heating chamber, it is attached to the outer wall of the lamp so
as to communicate with the outer air, the mouth of the tube is more flattened or
widened for the purpose of deflecting the air over the whole of the flat flame.
A number of burners may thus be placed in the mouth of the air heating chamber
so formed producing a horizontal line of light for outside-shop-window lighting
lamps, the draught through the air chamber is produced by a metal chimney of
similar shape projecting above the lamp. In a modification of the arrangement for
street lamps the lower part of the chimney is bell-mouthed a T shaped piece of
tubing is attached in the bell mouth so that the two upper ends pass through the
chimney wall and communicate with the air of the heating chamber, the lower end
projects downward into the lamp, the gas tubing passes through the T tube and
the burner or burners are placed at the mouth. In a modification for ordinary
Argand burners the glass chimney fits into a metal, chimney above it having within
it a T tube of the kind previously described the end of the T being below the
burner, the glass rests on a disc beneath the burner which prevents the entrance of
unheated air. This form of lamp may be used for heating or lighting.
By using a widened globe the flame may be deflected outward horizontally by
means of an annular rim placed at the bottom of the T tube.
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I, JAMES ROOTS of 25 The Avenue, Tottenham, Middlesex, 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 :-
The object of this invention, is the improvement of the light in a gas lamp by
supplying the flame with heated air, the outgoing products of combustion heating
the incoming air and thus intensifying the light by. perfecting the combustion.
For the purpose of this part of my invention which relates to an ordinary street
or similar lamp, the lamp is divided into two compartments, the upper or air
heating chamber and the lower or lighting chamber; the reflector may form the
division having the lower end of the chimney attached at its centre, the air
entering through perforations in the top of the lamp near the chimney wall passes
along the upper surface of the heated reflector to the burner or burners which are
of the flat flame type and which project inward through the reflector a short
distance thus directing their flames towards the centre as shown at Figure 1 of the
annexed drawings in which A are burners of ordinary flat flame kind so that if
four be used they just overlap each other in the centre. B B are two circles of
perforations all round the reflector through which the air enters to supply the
Hame, C is the chimney, D the air heating chamber and E. the gas pipe. The air
travels as arrows C indicate.
The air for one or more burners may be carried downwards by tubing from
above the flame as shown at Figure 2, the tubing thus forms an air heating
chamber. It is attached to the outer wall of the lamp so as to communicate with
the outer air. The mouth of the tube is more flattened or widened for the purpose
of deflecting the air over the whole of the flat flame. A number of burners may be
placed in the mouth of the air heating chamber so formed producing a horizontal
line of light for outside window lighting lamps.
Figure 2 is an outside shop window lamp in which A is the burner or burners,
flat flame, three or four in a row, if desired. B is the gas pipe and support from
shop front, Can air tube, circular at top where air enters through perforated cover,
curved as shown and flattened at bottom, so as to spread air over the three burners,
D) is the chimney and E the glass.
The draught through the air chamber is produced by a metal chimney of similar
shape projecting above the lamp. In a modification of the arrangement for street
lamps shown at Figure 3 the lower part of the chimney B is widened, a T shaped
piece of tubing A is attached therein so that the two upper ends pass through the
chimney walls B and communicate with the air of the heating chamber, the lower
end projects downwards into the lamp and may be made somewhat bell mouthed,
the gas tubing passes through the T tube A and the burner or burners C C and
also a disc or air deflector D are placed at the mouth.
Figure 4 is a plan view of the burners C_C and dise D. In a modification for
ordinary argand upward flame burners represented at Figure 5, the glass chimney
fits into a metal chimney above it. The metal chimney having within it an air
heating chamber of the T kind previously described, the lower end of the T being

page_text: below the burner. The glass rests on a metal disc below the burner which
prevents the entrance of unheated air. This form of light may be used for heating
or lighting. By using a widened globe the flame may be deflected outward
horizontally by means of an annular rim placed on the bottom of the T tube.
In Figure 5 A is a section of an ordinary argand burner. B a metal disc closing
the bottom of the glass and preventing air entering from below. C is a glass
chimney. D the metal chimney having a metal tube E of T shape to convey air
to burner, fixed in it.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is
1. The means of improving the light of downward burning gas flames and con-
verging to a centre and the application of heated air thereto in a downward
direction as described with reference to Figure 1 of the annexed drawings.
2. The arrangement of lamp shown in Figure 2 whereby heated air is supplied
for increasing the light of the gas flame as set forth.
3. The lamp shown at Figure 3 whereby the downward central supply of air
(heated) from a portion of the chimney is established as set forth.
4. The adaptation or modification shown at Figure 5 for supplying air (heated)
to the flame of an argand burner as set forth.
30h of Chatruh 700R