con
nected with the pump the usual tube which 80
is sealed off K.nited States Patent Office,
N Y. incandescent electric lamp, the 95
combination exhausted globe, refrac
tory light-giving body button therein, a
conductingsupport for said button within the
.)
To all whom concern:
Be known that Nikola Tesla, citizen
of the United States, residing New York,
in the countyand State NewYork, have in-
5 veDteda certain new and useful Improvement
in Incandescent Electric Lamps, which
the following specification, reference be
ing had the drawings accompanying and
forming part the same,
to This invention improvement the
particular class electric lamps lighting
devices invented and for which have
heretofore obtained Letters Patent, notably
No.
INCANDESCENT ELECTRIC LIGHT.
ApplicationfiledJanuary 2,1892. RenewedD
ecem
ber15,1893.
SPECIFICATION forming part Letters Patent No. (H
om
odel. 514,170, dated February .
[5 The invention applies more particularly to
that form lamp which small body or
button refractory material supported by
a conductor entering very highly exhausted
globe receiver, but also applicable gen-
20 erally other forms lamp adapted for use
with similar systems which currents of
very high potential and great frequency are
employed.
The lamp may made different forms
and different ways, and the invention, as
may readily understood from its above
described nature and purpose,is not confined . incandescent electric lamp, the
combination exhausted globe, refrac
tory light-giving body therein, conductor 90
leading into the globe and connected or
supporting the said body, and conducting
screen surrounding the said conductor, set
forth.
A description the ordinary form lamp
which employ will serve illustrate the
principle and nature this improvement,
and for such description now refer the
drawings which show such lamp central 50
vertical section. preventing such dissipation within the lamp,
or rather for confining the particular
parts part the conductor which de
signed givelight.
A glass globe the usual form, the
base which sealed very thin conduct
ing wire passing through stem of
glass other refractory insulator the 55
upper inner end this wire united, by
means mass ofcarbon paste carbon or
other refractory stem that supports car
ries small button carbon other suitable
substance Over the stem passed, 60
any convenient stage the manufacture of
the lamp and any well understood way, a
metallic tube prefer use for this. The globe, by
means suitable air pump, exhausted
to high degree practicable, until a
non-striking vacuum attained... The tube or
screen entirely insulated from the con
ductors within the globe and from all exter- 75
nal conductors bodies. Sucha device reason its electro
static action reduces the loss energy sup- 70
plied the bulb, preventing its radiation or
dissipation into space except through the ex
posed unprotected button. this
means the light-giving body button which
lies beyond the influence the screen is
40 quickly and efficiently brought and main
tained higher incandescence suitable
electrical current effect, reason the
fact that the electrical action which the
incandescence due confined mainly the
45 button.pur-
pose very thin cylinder tube alumi
num and should entirely surround all parts 65
of the conductor within the globe except the
button itself, extending nearly the
point union the stem with the button
F. This object find may
35 readily accomplish surrounding the lead
ing-in and supporting conductors with con
ductor which acts static screen.
What claim is—
1.
2. 454,622, dated June 23, 1891. SerialN
o, 493,776.
to the specific form lamp herein shown. have found the practical ap
plications this system that considerable
25 dissipation energy takes place from the
conductors conveying the currents great
potential and frequency, even when such con
ductors are thoroughly insulated both within
and without the lamp globes, and the sub-
30 jeet present invention means for
