nited States Patent Office. These contrivances,
15 while applicable generally means mak
ing and breaking electric circuit with
great rapidity,were devised more espe
cially for use nowwell-known system of
electrical conversion means condenser-
20 discharges and for this reason have been de
signed with especial reference the peculiar
and exceptional conditions which obtain in
such systems. 660,518, filed December 2,
1897, and others, have shown and described
various forms electric-circuit controllers
in which conducting fluid used for one or
both the terminals. 60
this, effect the closure the circuit through
two parts conducting fluid; but instead of
bi'eaking the circuit the movementof these
two parts terminals, before, sepai*ate
them periodically the interposition 65
insulator which preferably solid and re
fractory.
SPECIFICATION forming part Letters Patent No.
ELECTRIC-CIRCUIT CONTROLLER.
ApplicationfiledMarci 12, 1898. Any suitable means maybe employed for
effecting the rotation the receptacle, and
in illustration convenient and practicable
means for this purpose have shown ar- 90
mature secured cylindrical extension
of the receptacle that surrounds the socket
C, and field-magnet which supported
independently and stationary.
A preferred form improved circuit-
controller illustrated the accompanying
drawing, which shows central vertical sec- 80
tion the same.
necting the negative pole the gener
ator. 609,S48, dated August 16,1898. Nevertheless, there will always a
slow wearing away the metal, which to
overcome entirely novel manner the
object present improvement.
In the spindle Band concentric with its axis
is spindle PI, supported ball-bearings or
otherwise arranged have free movement
of rotation relatively the spindle 100
to little possible influenced the
rotation the latter.
The two terminals are contained air
tight receptacle iron steel, which is
mounted spindle suitable socket
orsupport C,so rotate freely. For example, provide plate or
disk with teeth projections—preferably of
glass, lava, the like—which are caused by
the rotation the disk pass through the 70
fluid conductor, jet, whatever may be,
and thus effect make and break the cir
cuit. The arma
ture-coils are connected with the segments 95
of commutator which bear brushes G. present invention an
improvement circuit-controllers this
25 kind, and order that the object and nature
of the impi’ovement maybe more readily un
derstood and appreciated may refer briefly
to the more essential characteristics the
devices described before, upon which the
30 presentimprovementisbased. 673,559. Asitwas pri
marily essential that these controllers ca
pable making and breaking the circuit at
a very rapid rate and such result could
not secured practically economically by
35 any the ordinary devices employing rigid
contacts terminals was led invent ap
paratus which the circuit connections were
established and broken between rigid ter
minal and fluid conductor between two
40 fluid conductorsin the form jets orstreams.)
To all whom concern:
Be known that Nikola Tesla, the
borough ofManhattan,in the city, county, and
State New York, have invented certain new
5 and useful Improvements Circuit-Control
lers, which the following specification,
reference being had the drawing accompa
nying and forming part the same.
N Y. (H
om
odel.
By means ofsuch device the breaks always
occur between fluid terminals, and hence de- 75
terioration and consequent impairment the
qualities the apparatus are avoided.
Under certain conditions, when the cir
cuit-controller operated from source of
direct current, the deterioration the solid
terminal may materially reduced eon- 55.
Any convenient means provided op
pose prevent the rotation the spindle.
In the forms apparatus employing rigid
or solid conductor one terminal and fluid
as the other the makes and breaks course
occur alwaysbetween solid and fluid termi-
45 nal, and although the operative parts my
improved circuit-controllers were usually con
tained air gas tight receptacles and in
an inert medium, both for the purpose im
proving their action and preventing deterio-
50 ration the terminals, there still lia
bility wear the rigid solid terminal. Thesocket 85
Gis secured forms part base stand
D.
In previous applications filed me, nota-
io bly Serial No. SerialHo
