this end per
mit the insulating compound after its incor
poration with the device, under exhaustion
and pressure, cool and solidify, that not 45
only the air replaced solid insulating
compound, but the formation vacuous
spaces the contraction the mass cool
ing prevented. The steam then
shut off and cold water passed through the
coil The connections with the pump are
5 then reversed and air forced into the tank
and receiver and the further cooling and
solidification the insulating material car
ried under pressure considerably greater
than that the atmosphere.
.
What claim is— 50
The improvement the manufacture of
electrical devices such condensers, which
consists inclosing the device air-tight
recejffacle, exhausting the air from the re
ceptacle, introducing into vessel containing 55
the device insulating material rendered
fluid heat, and then when said material
has permeated the interstices the said de
vice, subjecting the whole pressure, and
maintaining such pressure until the material 60
has cooled and solidified, set forth. After the in-
io sulating material has cooled and solidified
the condenser other device, with the adher
ing mass insulating material, removed
from the receptacle and the superfluous in
sulating material taken off,
is have found that condensers, transformers,
and similar apparatus treated this proc
ess are very superior quality and espe
cially suited for circuits which convey cur
rents high frequency and potential,
zo aware that conductors covered with a
more orless porous material have been treated
by placing them closed receptacle, ex
hausting the air from the receptacle, then in
troducing fluid insulating compound and
25 subjecting the same pressure, for the pur
pose more perfectly incorporating the in
sulating compound with the surrounding
coating covering the conductors and
causing such compound enter the inter-
30 stices said covering, and apply this prin
ciple exhausting the air and introducing
the fluid insulating compound under pres
sure carrying out improvement. ,
P arker e.
NIKOLA TESLA. My
process, however, differs from the foregoing
mainly this, that seek not only fill the 35
pores any porous material that may in
terposed between the conductors such a
device condenser coil, but fill up
all the spaces the dielectric, whereby air or
vacuous spaces, the presence which the 40
dielectric deleterious the device, may
be effectually prevented.577,671
55
of the condenser have been permeated with
the insulating material.
Witnesses:
M
