Improvements in and in connection with Incandescence Electric: Lamps.
Year: 1896

page_text: Date of Application, 22nd June, 1896-Accepted, 8th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in and in connection with Incandescence Electric:
Lamps.
We, GUSTAV GERMER of Mohnstrasse, Dresden, Germany, Overseer, and
FRIEDRICH ARNO HÜLLER of Kyffhauserstrasse in the same city, no occupation,.
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 gypsum sockets ordinarily used for incandescence electric lamps present:
several disadvantages, amongst which is porosity, and the short circuiting, which
latter takes place owing to the moisture attracted by the gypsum and at once-
renders the lamp unserviceable.
This invention has for object to provide such fittings or connections as will
remedy the above disadvantages and also effect a considerable saving of expensive.
material and of time in the manufacture.
In the accompanying drawing
Figs. 1 and 2 are elevations, the one at right angles to the other, of an
incandescence electric lamp with part of the invention applied thereto.
Fig. 3 is a top view of Figs. 1 and 2.
Figs. 4 and 5 are respectively a top view and an elevation of a socket for the
lamp.
On the lower part of the lamp neck a ring preferably not of metal, but of
porcelain for example, is so fixed that the upper part of the neck in which the-
copper conducting wires d, a, are embedded, remains free so that in no way can,
short circuiting or the like take place. The ring r is fixed in place preferably by
cement but any other suitable means may be employed for this purpose.
The ring is provided with a guard which may be made in one piece with the
ring or it may be made separate therefrom and fixed thereto in any suitable manner
and it may be made of a different non conducting material to the ring. Said
guard, bridges over the place of connection of the platinum wires p, l, with the
conducting wires d, a, and serves to prevent rupture between these two sets of
wires. By the arrangement of the guard b the eyes ordinarily bert in the
platinum wires, for the connection thereto of the copper conducting wires, may be
dispensed with, as the wires may be soldered together by the glass blower when
the carbon filaments are introduced, whereby also the many unevennesses or clefts
which the ordinary supplementary soldering occasioned is avoided.
.
So soon as the lamp is out of the hands of the glass blower the ring r is attached
thereto and the copper wires d, a, passed through the holes o in the guard b and
looped or wound round the same (Figs. 1, 3) so that any deflection of or pull upon
the wires will not have any effect at the place of connection with the platinum
wires p, l, and these therefore cannot be injured thereby.
The attachment of the lamp to the socket k is accomplished by means of two
nipples wo on the ring which first take into the vertical portion of grooves t, e,
formed in the inside of the socket by pressure upon the same from the inside
outwards, and then upon the socket being turned engage in the end of the
horizontal portion e of said slots.
The socket is then permanently secured by means of a stud passed into a hole c
in the rim n of the ring and soldered to the socket. At the same time and as
obtains with Edison and various other kinds of sockets the necks of which serve as

page_text: conductors, one (a) of the conducting wires may be led through said hole c
(Figs. 1, 3) and there soldered with the stud and socket whilst the other conducting
wire may be led to the cap or cover in the usual way and there soldered.
When it.is desired to remove the socket from the lamp it is only necessary to
release the solder at the two places, the socket being then ready for use with
another lamp as is also the case as regards the ring with the guard.
In this way the mauufacturer may effect a considerable saving of expense as the
ring with the guard b may be applied to all kinds of lamps and these thus
provided kept in stock and when necessary need only be soldered to the desired
socket, as distinguished from which the gypsum process and the drying of the
gypsum requires three days, further in each lamp, owing to the eyes in the platinum
wires being dispensed with as before stated there is a saving in each lamp of
10 millimetres of such wire.
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 :-
In incandescence electric lamps the ring leaving free the exit places of the
platinum wires and provided with nipples w for the attachment of the socket k
provided with grooves t, e, for taking onto the nipples we, said ring being provided
with a non conducting guard bridging over the place of connection and protecting
the connections of the conducting wires d, a, with the platinum wires p. 1, substan-
tially as described and shewn.
Dated this 22nd day of June 1896.
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.