Improvements in and connected with Gas-incandescence Lamps.
Year: 1898

page_text: Date of Application, 19th Aug., 1898-Accepted, 19th Nov., 1898
COMPLETE SPECIFICATION.
Improvements in and connected with Gas-incandescence Lamps.
We, KONRAD TROBACH, of 28, Berliner Street, Pankow, near Berlin, and
KURT SCHULTZE, of 4, Neue Promenade, in the City of Berlin, in the German
Empire, Civil Engineer and Manager respectively, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:-
This invention relates to a gas incandescence lamp, in which a burner with
channels or bores of capillary width is combined with an incandescence body
having the shape of a disk or band, and with a bipartite bulb resembling pre-
ferably the bulb of an electric incandescence lamp, and being also of about the
same size. This bulb however as already stated is bipartite (which forms an
important point of our invention) and the disk or band like incandescence body is
located in about the middle of the same, but in such a manner that it may be
adjusted with regard to the blue or non-luminous flame of the burner.
This flame is produced, not by a mixture of gas and air, but solely by gas, this
latter being divided into as many very fine or thin currents as there are capillary
channels or bores in the burner; the gas mixes with the air only outside the
burner, or at the top of same respectively, and owing to the very fine distribution
of the gas this latter comes into contact with so great a quantity of oxygen, that
there arises a blue or non-luminous flame of very great heat, this being also
due to the low rate of speed at which the gas issues from the capillary channels
of the burner, in that the gas is thereby very much throttled in the same, and
leaves them consequently with such a low velocity that each of the small currents
has ample time to mix perfectly with the surrounding air. The quantity of
gas passing through the capillary channels in a given time is, of course, very
small and the flame is thus considerably smaller or lower than in a burner of
the so-called Bunsen-type, but the heating power of that small flame is by far
greater than that of a Bunsen-burner consuming the same quantity of gas in the
same time.
We have found by an extended series of experiments that by far the best effect
is obtained by letting the flame in question act upon an incandescence body
resembling a disk or band, and manufactured in accordance with the directions
at present known. This point of our invention is combined with another point
consisting in enclosing that burner and incandescence body in a bipartite bulb.
as already stated. We prefer to use the lower half of this bulb as a hearing
for the incandescence-body, or more precisely, for a plate, or frame consisting of
a bad conductor of heat, and forming in its turn the bearing or support for the
incandescence body. The latter is preferably enclosed in a bipartite frame or
ring which holds the correspondingly shaped incandescence-body in such a manner
that the latter is not subjected to any pressure, but is free to exercise a certain
degree of vibration. It is important that the space below the said plate or frame
be in communication with the space above the same, so that the products of
combustion may freely escape without exerting an injurious effect upon the
incandescence-body.

page_text: In Figures 1 and 2 of the accompanying drawing we have shown a gas-incan-
descence-lamp constructed according to our invention. The incandescence-body e
of which, in this case, is perfectly flat, and is attached to a perforated plate d
consisting of mica, and having two superposed oblong frames f f¹, the latter
holding the incandescence-body e securely in place between them. The frames f f¹
do not however press upon the incandescence-body, but this latter may make
certain slight vertical movements which is important to secure the integral
coherence between the free or actually lighting main-part of the incandescence-
body, and that part which is covered by, or located between the frames f f¹.
Preferably we construct this part of our lamp in the manner represented in
Figure 8, in which the frames are provided with rims or flanges, the upper
frames being located inside the lower one f³, and this being supported by the
perforated mica-plate d. Of course the said frames need not indispensably be of
an oblong shape, but circular frames or true rings, and consequently circular
incandescence-bodies may be employed as well (see for instance Figures 6 and 7
which will be more fully described hereinafter).
Instead of providing the mica-plate & with many small apertures, it may be
provided with few large apertures or recesses, or one large central opening may
be made use of, which is not completely covered by the incandescence-body or
its support or holder, as shown, as an example, in Figures 3 and 4. In this case
the band-like incandescence-body e is supported by a platinum-wire f*, the middle
part of the incandescence-body hanging slightly down over that wire so as to
form a kind of roof, and there remain between the lateral rims of that part and
the opposite parts of the mica-plate d¹ and the openings & through which the
products of combustion may escape.
The mica-plate d is preferably located between the two parts cc¹ of the glass
bulb, as shown in Figure 1. The glass bulb itself is held by means of a fitting b
that may be displaced along the burner tube a so that the whole bulb with its
contents may be adjusted in height, the purpose of this arrangement being to
adjust the incandescence-body f¹ with respect to the flame, or to the hottest zone
of the latter respectively. In some cases the holder f f (Figure 1) or få f
(Figure 8) of the incandescence-body, may be attached directly to the head of
the burner-tube a, as represented in Figures 6 and 7. In this case the connected
rings are put into a curved holder &, which is fixed to a sleeve a', the
latter of which may be displaced along the head of the burner tube a, and fixed
in an appropriate position by means of a screw a³. The head of the extraordinarily
long burner tube contains of course, the burner proper a¹ Figure 1, with its
capillary bores a² Figure 1. It is a remarkable fact that the plane of the
flame stands rectangularly to the common flame of the two capillary bores (sce
Figure 1).
The gas-incandescence lamps afore described may be connected in groups of
any desired number, and they may also be arranged in a slight angular position,
especially if the incandescence-body is arranged similar to the manner represented
in Figures 6 and 7. We wish it to be understood that we do not limit ourselves
to the exact details shown in the drawing, but
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1st. In a gas-incandescence lamp, the combination with a burner having bores
of capillary width, of an incandescence body having the shape of a disk or band,
a bipartite bulb enclosing said burner and incandescence-body, and means for
adjusting the latter with regard to the flame of the former, substantially as
described.
2nd. In a gas-incandescence lamp, the combination with a burner having bores
of capillary width, of an incandescence-body having the shape of a disk or band,
a bipartite frame holding the incandescence-body between its halves, a bipartite

page_text: bulb enclosing said burner, incandescence burner and frame and means for
vertically adjusting the latter, substantially as described.
3rd. In a gas-incandescence lamp, the combination with a burner having bores
of capillary width, of an incandescence body having the shape of a disk or band,
a bipartite frame serving as a holder for the incandescence body, a bipartite bulb
enclosing said burner, incandescence-body, and frame, and means for holding the
latter between the two parts of said bulb, the bulb being arranged to allow of
a vertical displacement along the burner tube, substantially as and for the
purpose described.
4th. In a gas incandescence lamp, the combination with a burner having bores
of capillary width, of an incandescence-body having the shape of a disk or band,
a bipartite frame serving as a holder for the incandescence body, a bipartite bulb
enclosing said burner, incandescence-body and frame, a perforated or recessed
mica-plate serving as a holder for said frame, and being located between the two
parts of said bulb; the latter being arranged to allow of a vertical displacement
along the burner tube, substantially as and for the purpose described.
5. In a gas-incandescence lamp, the combination with a burner having bores
of capillary width, and being secured to a burner tube of extraordinary length,
of a bipartite bulb having an aperture at either of its ends; a fitting connected
with the lower end of said bulb and adapted to be displaced along said burner
tube; a perforated mica-plate located between the two parts of the said bulb,
a bipartite frame adapted to hold the incandescence body free of pressure, and
said incandescence-body, all substantially as shown and described.
Data 201
1000
GEO. THOS. HYDE,
1, Broad Street Buildings, Liverpool Street, London, E.C.,
Agent for the Applicants.