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Патент USA US3098900

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July 23, 1963
F. v. PETERSON
LIQUID TRANSMISSIVE AND ELECTRIC CURRENT
3,098,390
NON-TRANSMISSIVE APPARATUS
Filed Nov. 15, 1960
\h
M,sz gm.ys
INVENTOR.
FLOYD V. PETERSON
United States Patent O? ice
1
2
of FIG. 1 being used in one particular manner of the
many uses of the apparatus —-this particular use compris
3,098,890
LKQUHD TRANSMISSIVE
ELECTRIC CUR
RENT NQN-TRANSMHSSIVE APPARATUS
Floyd V. Peterson, 20728 Ventura Blvd,
‘Woodland Hills, Calif.
Filed Nov. 15, 1960, Ser- No. 69,441
ing the washing and cleaning of electrical insulators,
which support an electrical conductor (or plurality there
of) while said conductor is charged with a relatively high
voltage.
FIG. 3 is a vertical sectional view similar to FIG. 1, but
8 Claims. (Cl. 174—5)
The present invention relates to liquid transmissive
and electric current non-transmissive apparatus adapted
to allow the passage therethrough of liquid while pre~
venting ‘the passage of electric current therethrough from
a liquid input portion to a liquid output portion of the
apparatus. One such type of liquid transmissive and
electric current non-transmissive apparatus was initially
developed for use in an electrical precipitator apparatus
of the liquid spray type as disclosed in my co-pending
patent application, Serial No. 830,409, ?led July 29, 1959.
However, since the liquid transmissive and electric current
non-transmissive apparatus has numerous other useful ap
plications beyond its use in an electrical precipitator ap
paratus as disclosed in by above-identi?ed co~pending pat
illustrates a slightly modi?ed form of the invention in
cluding liquid level sensing means responsive to the quan
tity of liquid contained in the bottom of the hollow tank
means to control the in?ow of liquid through a liquid
?ow inlet conduit means whereby to maintain the quan
tity of liquid in the bottom of the hollow tank means with
in predetermined limits, and also including means for sup
plying an electrical insulating gas, such as air or the like,
under pressure to the hollow upper interior region of the
hollow tank means and for controlling and maintaining
said contained gas within predetermined pressure limits.
FIG. 4 is a fragmentary View of a portion of the tank
20 shown in FIG. 1 and illustrates a further modi?cation
of the interior insulating wall thereof including drip-induc
ing means adapted to facilitate the transmission of liquid
from the top of the tank to the bottom adjacent to the
ent application, the present application is thought desir
able in order to cover the liquid transmissive and electric
current non-transmissive apparatus, per se.
3,li98,890\
Patented July 23, 1963
,'
a
In addition to electrical precipitators, another ?eld of
application for the present invention is in connection with
washing electrical insulators which support one or
25
walls thereof while positively preventing the passage of
electric current along said path.
The liquid transmissive and electric current non-trans
missive apparatus of the present invention may be said
to include a hollow tank means having liquid ?ow inlet
more electrical conductors carrying relatively high
conduit means connected to said hollow tank means ad
voltage. This application of the present invention is de 30 jacent the top thereof and having liquid ?ow outlet con
scribed in detail in reference to the accompanying draw~
duit means connected to said hollow tank means adjacent
ings. It is considered that ‘the present invention will ?nd
the bottom thereof; and further having spray nozzle means
application in a number of other ?elds as its possibilities
, positioned within said hollow tank means above the bot
become realized.
tom thereof and connected to said liquid flow inlet con
It is an object of the present invention to provide ap 35 duit means and adapted to be supplied with liquid under
paratus which offers a readily transmissive path to a liquid
pressure therefrom, whereby to spray said liquid under
supplied under pressure greater than ambient pressure
pressure downwardly in the form 'of a plurality of ?ne
around the apparatus, with said pressurized liquid being
liquid droplets interspaced or separated from each other
delivered to the output portion of the apparatus at a pres
by an electrically non-conductive gas, such as air or the
sure only very slightly less than said input pressure (dif
fering therefrom by the very small pressure drop across
the apparatus of the present invention), but with the ap
like, positioned in the hollow interior upper portion of
paratus being substantially electrically non-conductive
from the liquid input portion to the liquid output portion
of the apparatus.
It is a further object of the present invention to provide
a liquid transmissive and electric current non-transmissive
apparatus which is simple to construct and operate and
said tank means between the spray nozzle means and a
quantity of the liquid contained in the bottom portion of
the hollow tank means, whereby to electric?ly isolate and
insulate said spray nozzle means from the liquid in the
bottom of the tank means and also from the liquid flow
outlet conduit means connected to said liquid in the bot
tom of the tank means. In one preferred form of the
invention, the interior of the tank has an electrically non
yet which will perform its designated functions of liquid 50 conductive surface and at least one of the inlet and outlet
conduit means connected to the tank means is electrically
transmission and electric current isolation continuously
and on a fail-safe basis.
Further objects will be apparent to persons skilled in
the art after a careful study hereof.
For the purpose of clarifying the nature of the present
invention, several exemplary embodiments are illustrated
in the hereinbelow-described ?gures of the accompanying
sheet of drawings, and are described in detail hereinafter.
FIG. 1 is a central vertical sectional view through one
insulated therefrom. Furthermore, another form of the
invention includes means for supplying the electrical in
sulating gas or air under pressure to the interior of the
hollow tank means and for controlling and maintaining
said gas or air in the upper portion of the hollow tank
within predetermined pressure limits. Furthermore, one
form of the invention may include liquid level sensing
vmeans responsive to the quantity of liquid contained in
the bottom of the hollow tank means to control the in?ow
illustrative embodiment of the present invention, with the 60 of liquid through the liquid flow inlet conduit means
liquid flow inlet and output conduits being broken away
whereby to maintain the quantity of liquid in the bottom
and shown in fragmentary form.
,
of the tank within predetermined limits.
FIG. 2 is an elevational View showing the liquid trans
In the speci?c embodiment illustrated in FIGS. 1 and
missive and electric current non-transmissive apparatus
2, the above-mentioned hollow tank means takes one
3,098,890
a
speci?c form, indicated generally at 10, comprising a
pressure tank assembly having an outer shell 11 of some
metal such as steel or high-strength copper, or the like,
and an inner lining 12 on the bottom and sides of the
tank fabricated from some suitable electrical insulating
material such as phenolic resin, hard rubber, glass, plastic,
or other suitable electrical insulating material. Initially,
the tank 110 is ?lled with a desired liquid, such as water
FIG. 3 illustrates a slight modi?cation of the tank
shown at 10 in FIGS. 1 and 2, and corresponding parts in
this view are indicated by similar reference numerals,
primed, however. In this modi?cation, it should be noted
that liquid level sensing means, such as that diagram
matically indicated at 34 and responsive to the level of the
liquid indicated at 14', may be effectively connected to
the control valve 21' for controlling the in?ow of water
to the spray nozzle 22’. This may be accomplished elec
or the like, through the cap 13 to the necessary level,
trically in the general manner indicated by having the
which, in general, may be about one-third full, as in
liquid level sensing means, indicated diagrammatically at
dicated at 14-. The valve 15 in the liquid ?ow outlet con
34, be any one of a number of well known types adapted
duit 16 may be closed by insulated stick operation to guard
to produce an electrical signal whenever the level of the
against any electrical voltages that may be encountered,
liquid, indicated at 14’, reaches either of two extreme
where such voltages are connected with the tank’s out
put portion. Air or some non-explosive gas is then 15 limits, upper and lower, and by having the control valve
21’ be of an electrically operated type responsive to the
pumped through the cap 17 into the upper hollow interior
electrical signal emanating from the liquid level sensing
portion 18 of the tank '10 until a desired operating pres
means 34. However, the liquid level sensing means 34
sure is reached. In operation, the valve 15 is opened
and input liquid is forced through the upper end 19 of
the tank 10 [from a liquid ?ow’ inlet conduit 20‘, which
is adapted to be connected to a suitable source of liquid
under pressure (not shown since such is well known in
the art) or it may be pumped into the tank 10 by some
controlling the valve 21' may be pneumatically coupled,
hydraulically coupled, mechanically coupled, or other
wise coupled and/or operated-and all Within the scope
of the present invention.
‘It should be noted that the modi?ed form of the liquid
tnansmimive electric current non-transmissive means
conventional pumping means. The in?owing liquid
passes through a check valve 21 and through a spray 25 shown in FIG. 3 includes a pressure sensing means 35
nozzle 22 positioned inside of the top end 19‘ of the tank
10 whereby to produce a ?ne spray consisting of a plu~
railty of droplets of liquid or water, as indicated at 23,
carried by the top of the tank 19' and adapted to control
interspersed and effectively spaced and insulated from
in the art so as to‘ maintain the pressure of the air or gas
a source of air or gas under pressure, indicated diagram
matically at 36, in any conventional manner well known
each other by the air or gas under pressure in the upper 30 in the hollow upper interior region 18’ in the tank 10’
portion 18 of the tank '10. The falling liquid spray drop
within predetermined speci?ed limits.
lets 23, downwardly emitted from the spray nozzle 22,
FIG. 4 illustrates, in fragmentary form, a slight rn-odi
drop onto the top surface, indicated at 14, of the quantity
?cation of the inner wall 12 of insulating material of the
of liquid in the bottom of the tank 10- in a manner where
form of the invention illustrated in FIG. 1 wherein it
by the liquid is effectively transmitted from the top 19 35 effectively includes drip-inducing means, indicated gener
to the bottom of the tank 10, while ‘electric current ?ow
rally at 37, which is provided by reason of the fact that the
from the top to the bottom of the tank '10 or from the
insulating material 12” is angularly channel-led hori
liquid flow inlet conduit 20 to the liquid ?ow outlet con
zontally to provide a “skirt insulator” effect. After
duit 16, or vice versa, is effectively prevented; thus the
fabrication, the overall channelled surface may have a
liquid flow outlet conduit 16 and the outlet liquid that is 40 material applied to it which has little a?inity for the
allowed to emerge from the bottom of the tank 110 through
water droplets. This may comprise certain silicon paints,
said liquid flow outlet conduit .16, are effectively electri
or the like, although not speci?cally so limited. The
rcally isolated from the input portion at the top of the
spray water introduced into this modi?cation of the inven
tank 10 by reason of the tank inner lining 12 of electrical
tion will normally break up into droplets when running
insulating material, by reason of the air or gas space 45 a short distance down the vertical wall lined with said
between the liquid droplets 23 as they fall to the bottom
channelled material as indicated at 37, and the upper part
of the tank 10 to join the liquid accumulated in the
of the channels at least will stay substantially dry. Thus,
bottom thereof, as indicated at ‘1'4, and by reason of the
the channelled wall material '12” will provide an essen
insulator 24, which insulates the liquid flow outlet con
tially electric current non-transmissive path between
duit 16 from the metal shell 11 of the tank 10. Hence
vertical points on the wall when said points are separated
an electric current non-transmissive path is established
by at least a few channels—and this will be so even if
between the liquid ?ow inlet conduit 20‘ and the liquid
some of the sprayed liquid condenses and runs down the
flow outlet conduit (16.
channelled walls 12".
FIG. 2 illustrates the tank means ‘10 of FIG. 1 with its
It should be understood that the ?gures and the speci?c
liquid ?ow out-iet conduit means 16, comprising a ?exible 55 description thereof set forth in this application are for
tube, connected to a spray nozzle 25 and having a longi
the purpose of illustrating the present invention and ‘are
tudinal guiding stick 26 made of electrical insulating mate
not to be construed as limiting the present invention to
rial connected as indicated at 27 with respect thereto
the precise and detailed speci?c structure shown in the
and provided with a handle 28 at the opposite end thereof
?gures and speci?cally described hereinbefore. Rather,
for use in manually guiding the spray nozzle .25 into a 60 the real invention is intended to include substantially
proper position for cleaning purposes, such as for clean
equivalent constructions embodying the basic teachings
ing a high voltage electrical conductor, such as is indicated
and inventive concept of the present invention.
at 29 (in cross section) and which is part of a high volt
I claim:
age electrical power system, indicated generally at 30,
1. A pressurized closed-circuit liquid-transmissive ‘and
and is supported by an electrical insulator 31 suspended 65
electric-currentdnontnansmissive apparatus which offers a
from a cross arm 32 (shown in section). The water or
readily transmissive path to a liquid supplied to an input
liquid spray 33 emitted from the spray nozzle 25 is di
portion
of said apparatus under an input pressure greater
rected toward the insulator 31 for cleaning purposes, as
than that exterior of the apparatus, with said liquid being
indicated. The electrical energy carried by the high ‘volt
age conductor 29 will not be conducted to ground even 70 delivered to an output portion of said apparatus at an out
put pressure slightly less than said input pressure by a
when in close proximity to the spray nozzle ‘25, and even
differential pressure corresponding to the pressure drop
with a virtually solid liquid stream ?owing from said
across the apparatus from the input portion to» the output
spray nozzle 25, since the tank 10 and also the guiding
portion, with said output pressure being in excess of the
stick 26 are electric current non-transmissive with re
75 pressure exterior of said apparatus, and with said apparatus
spect to the spray nozzle 25.
8,098,890
5
being substantially electrically non-conductive from the
liquid input portion of the liquid output portion, compris
ing: ‘a hollow, sealed i-nterior-pressure-holding tank, said
tank having 1an electrically non-conductive interior surface;
liquid ?ow inlet conduit means connected to said hollow
tank means adjacent the top thereof; liquid ?ow outlet con
6
said hollow tank to control the in?ow of liquid through
said liquid ?ow inlet conduit means whereby to maintain
the quantity of liquid in the bottom of said tank within
predetermined limits.
5. A pressurized closed-circuit liquid-transmissive and
electric-current-non-transmissive apparatus which offers a
readily transmissive path to a liquid supplied to an input
duit means connected to said hollow tank means adjacent
the bottom thereof; at least one of said conduit means
portion of said apparatus under an input pressure greater
connected to said tank being electrically insulated there
than that exterior of the apparatus, with said liquid being
from; means for pressurizing the interior of said tank to 10 delivered to an output portion of said apparatus at an
an interior pressure greater than the pressure exterior of
output pressure slightly less than said input pressure by a
said tank; and spray nozzle means positioned within said
differential pressure corresponding to the pressure drop
hollow tank above the bottom thereof and connected to
across the apparatus from the input portion to the output
said liquid ?ow inlet conduit means and adapted to be
portion, with said output pressure being in excess of the
supplied with liquid therefrom under a pressure slightly 15 pressure exterior of said apparatus, and with said appa
greater than said interior pressure of said tank by a
ratus being substantially electrically non-conductive from
pressure difference corresponding to the pressure drop
the liquid input portion to the liquid output portion, com~
across the spray nozzle means whereby to spray said
liquid under pressure downwardly in the form of a plu
rality of separated ?ne liquid droplets whereby to elec
trically isolate and insulate said spray nozzle means from
prising: a hollow, sealed interior-pressure-holding tank,
said tank having an electrically non-conductive interior
surface; liquid flow inlet conduit means connected to said
hollow tank means adjacent the top thereof; liquid flow
liquid collecting in the bottom of the tank.
2. Apparatus of the character de?ned in claim 1, in
cluding means responsive to the quantity of collected
outlet conduit means connected to said hollow tank means
the liquid input portion to the liquid output portion,
6». Apparatus of the character de?ned in claim 5, in
cluding means responsive to the quantity of collected
liquid contained in the bottom of said hollow tank to
control the in?ow of liquid through said liquid ?ow inlet
conduit means whereby to maintain the quantity of col
lected liquid in the bottom of said tank within predeter
mined limits.
7. A pressurized closed-circuit liquid-transmissive and
electric-current-non-transmissive apparatus which offers
adjacent the bottom thereof; at least one of said conduit
means connected to said tank being electrically insulated
liquid contained in the bottom of said hollow tank to 25 therefrom; means for supplying an insulating gas to the
control the in?ow of liquid through said liquid ?ow
‘interior of said hollow tank and for maintaining the
inlet conduit means whereby to maintain the quantity of
pressure of said insulating gas in the interior of said hollow
collected liquid in the bottom of said tank within pre
tank at an interior tank pressure greater than the pressure
determined limits.
of ‘ambient air exterior of said tank; and spray nozzle
3. A pressurized closed-circuit liquid-transmissive and 30 means positioned within said hollow tank above the
electric-current-non-transmissive apparatus which offers a
bottom thereof and connected to said liquid ?ow inlet
readily transmissive path to a liquid supplied to an input
conduit means and adapted to be supplied with liquid
portion of said apparatus under an input pressure greater
therefrom under a pressure slightly greater than said in
than that exterior of the apparatus, with said liquid being
terior pressure of said tank by a pressure difference corre
delivered to an output portion of said apparatus at an out
sponding to the pressure drop across the spray nozzle
put pressure slightly less than said input pres-sure by a
means whereby to spray said liquid under pressure down
diiferential pressure corresponding to the pressure drop
wardly in the form of a plurality of separated ?ne liquid
across the apparatus from the input portion to the output
droplets interspaced by said electrically non-conductive
portion, with said output pressure being in excess of the 40 gas whereby to electrically isolate and insulate said spray
pressure exterior of said apparatus, and with said appara—
nozzle means from liquid collecting in the bottom of
tus being substantially electrically non-conductive from
the tank.
comprising: a hollow, sealed interionpressure-holding
tank, said tank having an electrically non-conductive 45
interior surface; liquid ?ow inlet conduit means connected
to said hollow tank means adjacent the top thereof; liquid
?ow outlet conduit means connected to said hollow tank
means adjacent the bottom thereof; at least one of said
conduit means connected to said tank being electrically
insulated therefrom; said tank being adapted to contain
a quantity of liquid to be transmitted therethrough in the
bottom thereof in communication with said liquid ?ow
outlet conduit means, ‘and being adapted to contain a
quantity of electrically non-conductive gas in the upper
portion of the hollow interior of said tank between the
spray nozzle means and the liquid in the bottom of said
a readily transmissive path to a liquid supplied to an input
portion of said apparatus under 1an input pressure greater
than that exterior of the apparatus, with said liquid being
delivered to an output portion of said apparatus at an
output pressure slightly ‘less than said input pressure by
a differential pressure corresponding to the pressure drop
tank; means for pressurizing the interior of said tank
across the apparatus from the input portion to the output
and said quantity of electrically non-conductive gas in
portion, with said output pressure being in excess of the
the upper portion thereof to an interior pressure higher 60 pressure exterior of said apparatus, and with said appa
than the pressure exterior of said tank; and spray nozzle
ratus being substantially electrically non-conductive from
means positioned within said hollow tank above the
the liquid input portion to the liquid output portion,
bottom thereof and connected to said liquid ?ow inlet
comprising: a hollow, sealed interior-pressure-holding
conduit means and adapted to be supplied with liquid
tank, said tank having an electrically non-conductive inte
therefrom under a pressure slightly greater than said 65 rior surface; liquid ?ow inlet conduit means connected
interior pressure of said tank by a pressure difference
to said hollow tank means adjacent the top thereof; liquid
corresponding to the pressure drop across the spray nozzle
?ow outlet conduit means connected to said hollow tank
means whereby to spray said liquid under pressure down
means adjacent the bottom thereof; said liquid ?ow outlet
wardly in the form of a plurality of separated ?ne liquid
conduit means connected to said tank adjacent the bottom
droplets interspaced by said electrically non-conductive 70 thereof being electrically insulated therefrom; rneans for
gas whereby to electrically isolate and insulate said spray
supplying an insulating gas under pressure to the interior
nozzle means from the liquid in the bottom of the tank.
of said hollow tank and for controlling and maintaining
4. Apparatus of the character de?ned in claim 3, in
said gas within predetermined pressure limits in excess
cluding liquid level sensing and responsive means respon
of said exterior ambient pressure around said tank; and
sive to the quantity of liquid contained in the bottom of 75 spray nozzle means positioned within said hollow tank
8,098,890
3
said interior pressure of said tank by a pressure difference
corresponding to the pressure drop across the spray nozzle
means whereby to spray said ‘liquid under pressure down
8. Apparatus of the character de?ned in claim 7, includ
ing means responsive to the quantity of collected liquid
contained in the bottom of said hollow tank to- control the
in?ow of liquid through said liquid ?ow inlet conduit
means whereby to maintain the quantity of collected
liquid in the bottom of said tank within predetermined
wardly in the form of a plurality of Separated ?ne liquid
limits.
above the bottom thereof ‘and connected to said liquid
flow inlet conduit means and adapted to ‘be supplied with
liquid therefrom under a pressure slightly greater than
droplets interspaced by said electrically non-conductive
gas whereby to electrically isolate and insulate said spray
nozzle means from liquid collecting in the bottom of the 10
tank.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,673,232
Silsby ________________ __ Mar. 23, 1954
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