Improvements in Incandescent Electric Lamps.
Year: 1897

page_text: I, ROBERT NORDMANN, of 6, Calmeyergaden, Christiania, Norway, Engineer, do
hereby declare the nature of this invention to be as follows:-
The object of the present invention is an incandescent electric lamp, in which
the glass which directly encloses the incandescent wire, is provided at its bottom
with a lens in such a way and of such a construction that the lens is traversed by
a great part of the luminous rays which come from the incandescent wire. The
incandescent wire as with ordinary incandescent lamps, starts from the support
and leads towards the bottom in a vertial direction. But in the bottom--with
any incandescent lamp-near the lens, the incandescent wire, contrary to the
vertical direction it has adopted until now, becomes horizontal. The horizontal
part can have different sinuous figures.
L. DUVINAGE,
Patent Agent, S, Rue des Princes, Brussels, Belgium.
Improvements in Incandescent Electric Lamps.
I, ROBERT NORDMANN, of 6, Calmeyergaden, Christiania, Norway, 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; -
My invention relates to improvements in incandescent electric lamps.
And in order that my invention may be thoroughly understood, I now proce.d
to describe the accompanying drawing thereof reference being had to letters and
figures marked thereon.
Fig. 1. shows in elevation an incandescent electric lamp in which the glass a,
which immediately surrounds the incandescent filament d, is provided at its
bottom with a lens e, which latter is so arranged that a large portion of the rays
of light emanating from the incandescent filament d. (from the support f)

page_text: extends downwards. At the bottom, however, in this case, near the lens c, in
my incandescent electric lamp, the incandescent filament dis directly contrary to
the vertical direction which it has taken up to this, becomes horizontal as shown
at . The horizontal portion may be formed so as to present different outlines as
is shown in Fig. 2, which is a plan of the lamp. The lens is attached to the
body of the lamp by fusion.
TECHNICAL ADVANTAGES.
The concentration of the incandescent filament producing the light, and con-
sequently of the luminous rays near the lens, and concentration through the
lens, and consequently a much more complete radiation of the light given out
by the lamp.
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
1 claim is:
1. In incandescent electric lamps, the combination of parts and arrangements,
in the bottom of the glass bulb or globe immediately surrounding the incandescent
filament, of a lens so formed as regards size and direction that it will receive and
transmit the major portion of the luminous rays, given out by the incandescent
filament.
2. In the incandescent lamp claimed in the first claim, the arrangement of an
incandescent filament having a horizontal portion situated as close as possible to
the lens, and of which the position and the dimensions are in such correspondence
with the lens that this latter is able to receive and to transmit the greater portious
of the luminous rays given out by the incandescent filament.
Dated this 23rd day of September 1898.
J. P. BAYLY,
18, Fulham Place, London, W., Agent for the Applicant.