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Патент USA US2111041

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March 15, 1938.
File'd May 14, 1935
FIG. 2
Patented Mar. 15, 1938
Joseph B. Brennan, Fort Wayne, Ind.
Application May 14, 1935, Serial/ No. 21,429
12 Claims. (Cl. 220-89)
My invention relates to electrolytic cells and
more particularly to an improved method of seal
‘This elevation in temperature'may be due to a
number of reasons, as is well known to those
ing and venting electrolytic cells, as electrolytic
condensers. Such electrolytic condensers usually
versed in the art; and, when arising from oper
ating conditions, is always accompanied by gas
5 have one or more ?lm-forming electrodes sur
rounded by a suitable electrolyte, or multiple elec
trodes and electrolyte therebetween. The capac
ity elements of a condenser are usually put in a
container, which may consist of a cylindrical
10 tube of aluminum.
In service, such condensers have a metallic cap
spun into at least one end of the container. The
usual practice at present has been to use a gasket
in sealing the cap to the top of the container,
15 and a separate venting means‘is usually provided,
consisting of a fusible metal and an ori?ce in
said cap or a rubber member having an ori?ce in
said rubber member.
‘Another combination vent and sealing means
20 now in use consists of a,gasket made by cutting
a vent is to sandblast one or more of these sur
faces and then deposit a fusible substance, as
wax, thereon: or metallic particles may be sprayed
on one or more of these surfaces and wax depos
ited thereon subsequently; or the surfaces may 15
be treated chemically and roughened, as by etch
ing, and a fusible substance deposited thereon.
A further means of accomplishing the purpose
of this invention is to cover the faces of the
?ange to be used in sealing with hard particles,
out annular pieces of material from a sheet of
as of sand or metal, having a fusible substance
cloth impregnated with a substance such as wax.
mixed therewith, or a layer of a fusible substance,
as of Wax, deposited thereon, either before or sub
Objection has been found in the use of this latter
type of sealing and venting means, due to-the fact
25 that the cloth itself may act as an effective seal
and not have any venting characteristics, in case
the cloth is too highly compressed when the cap‘
and the end of the container are spun or forced
within the condenser which may, if not relieved
adequately, cause an explosion. Thus, this vent
ing and sealing means operates in the nature
of a safety device.
Another method of providing a spacing means
for the metallic surfaces which are to be used as‘ 10
In my invention I have been able to overcome
this latter difficulty and also to provide a positive
- spacing means between the cap face and the face
of the end of the container. This is accomplished
by roughening either of these faces or both and
coating said roughened face or faces with a mate
rial such as wax, which, when an elevated tem
perature is attained in the operation of the con
denser, will fiow from between the faces of the
cap and the end of the container, permitting
40 gases which develop within the condenser to es
sequent to the operation wherein the particles
are deposited thereon.
As another means, a layer of fusible substance
may be deposited on one ormore of the metallic
surfaces which are to be juxtaposed and a ?brous
?ock attached thereto, as by spraying an air
blast while the fusible substance is in a par
tially liquid condition, so that the particles of
?ock will form a layer thereon and act as a spac
ing means.
In the drawing forming a part of this speci?ca
tion Figure 1 is a section showing the cap such
as is ordinarily used for sealing the container of a ’
cell of the type described. This cap may con
sist of aluminum or other metal which is formed
in a punch press operation. At the same time
this cap is formed into the shape shown in Fig 40
ure 1, an embossed surface may be formed there
cape without damage to the condenser when in
operation. As a means of roughening, embossing on by well-known means.
Figure 2 is an ordinary type wet electrolytic
or knurling is satisfactory.
container wherein the container (5) of electro
In this way economy is e?ected by the elimin
lyte (l) and the electrode (6), with ariser (l0)
45 ation of the use of cloth or such material.‘L The
roughening operation is accomplished at the same ' extending outward therefrom and having a seal
time the cap is formed, or at the same time the ing means (9), and surrounded by a neck (8),
has a ?ange (4) at the top thereof. The shape
?ange is formed on the end of the container sub
sequently, and before sealing, either one or both of the ?ange (4) conforms to the shape of the
50 of these faces are coated with a substance such embossed face (2) of the cap (I). The usual 50
as wax, and a positive spacing means is secured. method of attaching the cap (I) to the con
tainer (5) is by spinning the ?anges (2 and 4)
Such a venting and sealing means is particular
ly applicable to the so-called wet condenser, or together, after the faces thereof have been placed
to any electrolytic cell which, in operation, is together. Prior to this spinning operation a layer
55 characterized by an elevation in temperature. of fusible substance (3) such as wax‘is coated, 55
as with spraying or with a brush, onto the
peripheral ?ange of the cap ( l ) .
Referring to Figure 3 of my drawing, wherein
the manner of sealing is shown, the embossed
face (2) of the cap (I) is mechanically attached
to the ?ange (4) of the container in such a way
6. A vent for an electrolytic cell comprising
a non-compressible porous spacing means, the
pores thereof being sealed with a fusible sub
that when an elevation in temperature, which
may result from operation of the condenser, is
attained, the fusible substance, such as Wax (3),
’7. In combination, a vent and seal comprising
10 melts and flows by gravity or/and gas pressure
from within the interstices or ori?ces produced
by the embossing (2).
While I have described a speci?c instance of
my invention, and while this illustrates its appli
15 cation speci?cally, I do not wish to be limited
either in constructive details or application
porous, rigidly-spaced metallic surfaces‘ sealed
with a fusible material therebetween.
8. A seal and vent comprising an embossed
metallic surface juxtaposed on asecond metallic
surface, and a layer of a fusible material there
9. A vent and seal comprising a reticular me
tallic spacer and a fusible ?ller therefor, which
thereby, but desire my claims to be construed as
acts as a seal.
broadly as permissible, in view of the prior art.
10. In combination, in an electrolytic device,
spaced metallic surfaces, at least one of which
surfaces is roughened, and a fusible, liquid tight 20
seal disposed between said metallic surfaces.
11. An electrolytic cell comprising in combi
What I claim is:-
prising a roughened metallic surface sealed with
a fusible substance against an adjacent metallic’
1. A sealing and venting device for an electro
lytic cell comprising rigidly shaped surfaces,
spaced apart by a. rigid porous means, the pores
thereof being ?lled in with a fusible sealing
2. A venting and sealing means for an elec
trolytic cell comprising juxtaposed surfaces, one
of which is embossed, the embossings thereof be
ing ?lled with a fusible substance.’
3. A venting and sealing means for an elec~
30 trolytic cell comprising a metallic porous spacing
means, the ori?ces of which are sealed with a
fusible substance.
4. A fusible vent consisting of a. porous me
tallic structure, the pores of which are sealed
35 with wax.
5. A vent for an electrolytic condenser com
nation a container for electrolyte, a closure
therefor, said container and closure having
juxtaposed surfaces, rigid reticular spacing 25
means for maintaining said juxtaposed surfaces
in spaced relationship, and a layer of fusible
sealing material disposed between said surfaces.
12. An electrolytic cell comprising a container
for electrolyte, a closure member therefor, said 30
container and closure having juxtaposed sur
faces, at least one of said surfaces being rough
ened and the space between said surfaces being
sealed with a fusible material.
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