The combination, with globe re
ceiver exhausted the non-striking point, 120
metallic wires sealed therein, refractory
conductor united each said wires with
in the globe, insulating-covering around
the wires and joint, and refractory insulat
ing-body surrounding the refractory conduct- 125
ors near the joint, set forth.
In lieu connecting the two carbons di
rectly the circuit through leading-in wires,
40 provision may made for inductively con
necting them, means condensers. incandescent electric lamp, the no
combination, with globe receiver ex
hausted the non-striking point, metallic
wires sealed therein, refractory body
mounted electrically connected each
wire, the said wires within the globe and such 115
parts the refractory body are not be
rendered incandescent being coated cov
ered with insulation, set forth. The combination, with globe re
ceiver exhausted the non-striking point, of
two isolated bodies refractory conducting
material adapted emit light incandes- 105
cence and mounted within said globe, and
means for connecting said bodies with the
two poles terminals, respectively, a
source electrical energy.
Lamps thus made are attached vacu
um-pump the usual way. have merely
shown herein typical forms which embody
the principle the invention and which by
experience have demonstrated prac- 80
tical lamps.
The fact, therefore,.
4.
What claim invention is— 95
1. The globe has
two extended tubular portions B'. There electrical con
nection any time between the two carbons
of this Lampand visible discharge trans-
65 fer current from one the other through
the highly-rarefied medium between them. incandescent lamp consisting two
isolated refractory conductors contained a
non-striking vacuum and adapted produce
light incandescence, each being provided
with terminal for connection with source toc
of electrical energy, set forth.
J are plugs fire-clay the like con
tained the extensions B'.
The manner making the lamp and the 75
general form the lamp whole may be
varied numberless ways. After the pro
cess exhaustion has been carried for
20 some time they are brought incandescence
by suitable current, which the fire-clay
is thoroughly baked and the occluded gases
are driven off.
The entering wires Care surrounded small
tubes cups The joints between the
5 wires and the incandescing conductors are
made within these cups any ordinary man
ner, and the lower parts the cups are tilled
with bronze-powder other suitable ma
terial effect good electrical connection,
io The cups are then filled with fire-clay or
other refractory non-conductor which is
molded around the carbons The carbons or
other refractory conductors semi-conduct-
orsG are completelyisolated from oneanother. With such currents
as are employed operate these lamps, con
densers small capacity, such those thus
made, transmit the energy from the outside
circuit the carbons within the adobe with
60 little loss. Inasmuch there is
a tendency sparking when the current is
turned before the exhaustion has been
carried very high, well, when the char
acter the carbon admits it, cause their
30 ends approach, order that the sparks
may leap across between such points, where
by the danger injury the carbons the
lamp lessened.
15 They are here shown slender strips; but
they may have any other desired shape. The two con
ductors are supported these plugs
30 and connected metallic strips with the
condenser-coatings K', respectively. 70
The carbons, whatever substance may
be used their stead, may any desired
form and maybe placed different relative
positions. shows form lamp this descrip
tion that have employed. The conductors outside the
globe, well all those which convey the
35 current from the source, should carefully
insulated prevent the dissipation the
current. The exhaustion carried to
the highest possible point, and the globe
25 finally sealed off IT.,
that they are exhausted beyond the non-
striking point. This lamp exhausted and sealed
off from the pump the same mannerasthat
first described.
Witnesses:
Robt.
2.
As the lamps which employ and which
are made above described are absolutely
inoperative any system from which the
hereinbefore-described conditions poten- 85
tial and frequency are absent, the various
lamps heretofore devised for use with high-
potential currents,in which the exhaustion, of
necessity, has not been carried beyond
the non-striking point, are practically worth- 90
less new system, and this the distin
guishing feature novelty lamps—viz.
8.
Fig. Inside
43 these tubular extensions are condenser-
coatings KK'.455,069
or base Conducting-wires enter tbis
globe and are sealed the walls thereof.
NIKOLA TESLA.of their being rendered,
incandescent the action such current
as have described seems mainly at
tributable condenser action.
. Over
the outside the extensions are fitted
insulating-caps N',having metallic linings
O O', with terminals adapted for connection
53 with the cii’cuit-wires. Gaylord,
Parker Page
