Year: 1886

page_text: Date of Application, 27th Oct., 1886.
Complete Left, 25th July, 1887.
Complete Accepted, 26th Aug., 1887.
I, FREDERICK SIEMENS of No. 12 Queen Anne's Gate, Westminster in the County
of Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
In my Specification No. 10560 of 1884 I described a construction of Gas Lamps
with flames, not enclosed, supplied with heated air by ascending channels, the flames
being placed under a dome.
In
According to my present invention, in such lamps, I form the flames of a number
of jets arranged circularly around the interior of the reflecting dome in its upper part,
all these jets being directed radially towards the centre; the heated air enters the
dome above the jets and is preferably directed downwards by giving a suitable curve
to the dome above the jets. A flame is thus produced of great brilliancy taking the
form of an inverted vase or hollow cone of light. The jets may be directed down-
wards so that they may clear themselves more readily of dust. Instead of employing
a completely circular flame, an oval or other closed curve may be used and for some
purposes the flame may have the form of a segment of a circle or other curve.
order to increase the heating power of the air supply, the regenerative channels in
which it is heated and those which serve for carrying away the products of combustion
may be furnished with baffles or projecting ribs or gills presenting an extended
surface for giving and receiving heat. These ribs or gills, without being entirely
enclosed in channels, may be used as regenerators for conveying heat by conduction
from the outflowing products of combustion to the air supplying the burner in the
well known manner, as described in the Specification to C. W. Siemens' Patents
No. 4683 of 1880 and 3328 of 1882.

page_text: An Improvement in Regenerative Gas Lamps.
I, FREDERICK SIEMENS of No. 12 Queen Annes Gate, Westminster in the County
of Middlesex, Engineer 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:—
In my Specification No. 10560 of 1884 I described a construction of Gas Lamps
with flames, not enclosed, supplied with heated air by ascending channels, the flames
being placed under a dome.
According to my present invention, in such lamps, I form the flames of a number
of jets arranged circularly around the interior of the reflecting dome in its upper part;
all these jets being directed radially towards the centre; the heated air enters the
dome above the jets and is preferably directed downwards by giving a suitable curve
to the dome above the jets. A flame is thus produced of great brilliancy taking
the form of an inverted vase or hollow cone of light. The jets may be directed
downwards so that they may clear themselves more readily of dust. Instead of
employing a completely circular flame, an oval or other closed curve may be used and
for some purposes the flame may have the form of a segment of a circle or other curve.
In order to increase the heating power of the air supply, the regenerative channels in
which it is heated and those which serve for carrying away the products of combustion
may be furnished with battles or projecting ribs or gills presenting an extended
surface for giving and receiving heat. These ribs or gills, without being entirely
enclosed in channels, may be used as regenerators for conveying heat by conduction
from the outflowing products of combustion to the air supplying the burner in the
well known manner, as described in the Specification to C. W. Siemens patents
No. 4683 of 1880 and 3328 of 1882.
The accompanying drawing is a vertical section of a regenerative gas lamp
according to my present improvement. A is an annular chamber supplied with gas
by the pipes a and having a number of jet orifices B arranged around its inner
periphery directing jets of gas either horizontally as shewn, or it may be somewhat
downwards. Air for supporting combustion enters by the passage Call round and
passes over the upper surface of A and along the under surface of the chamber D and
issues immediately over the jets B. The hot products of combustion rise through a
cone E and pass along the chamber D returning by an upper chamber F to the
chimney G. The upper sides of the chambers D and F are preferably covered
with material such as asbestos fabric which imperfectly conducts heat so that there is
little loss of heat by radiation outwards. Besides the air which enters at C and which
is highly heated in its passage by contact with the wall of D additional air may rise to
the flame along the under surface of A which is heated by radiation from the flame.
In order to increase the heating effect of A upon the air passing against its under
surface gills or fins may project from that surface, and such gills or fins may also

page_text: project from the partition which separates the passages C and D in order the more
effectually to heat the air passing along C.
The hot products of combustion instead of being caused to pass along the channels D
and F might pass more directly to the chimney G heating on their way a body of
metal at the base of the chimney. From this body fins or ribs extending along the
upper side of the channel C will convey heat thereto by conduction, so as to warm the
upper air supply.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed I declare that what I claim is :-
In a regenerative gas lamp having its flame not enclosed, the construction and
arrangement of a ring burner in combination with passages for supply of heated air to
the burner, substantially as described.