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Патент USA US2408179

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Sept. 24, 1946._ I
2,408,1 78
J. SANDUSKY
ELECTROLYTE LEVEL CONTROL DEVICE-FOR- STORAGE. BATTERIES
Filed May 3, 1945
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2,408,178
Patented Sept. 24,‘ 1946
UNITED STATES PATENT OFFICE.‘
- ELECTROLYTE LEVEL CONTROL DEVICE
FOR STORAGE BATTERIES
Julius Sandusky,. Toronto, ‘ Ontario, Canada.
Application May 3,1945,'SeriaINo.591,816;
10 Claims.
(01. 136-177)
'
.
.
Extending down from the top 2 of the cell
into the interior of’ the cell aidis-tance of about
78;" below the underside of the top 2 ofv the cell
This invention relates to electrolyte level con- I
trol device for storage batteries, and particularly
the type of device in which the ?lling up of the
?lling passage indicates when the battery is
?lled to the proper level.
)
is a ?lling tube 5- which forms a closed air space
below the top of the cell.
Formed or cut in the wall of the tube. 5 are
three slots 6, 6, 6 which form vent. apertures ex
~
In the prior United States Patent No. 2,306,569
issued September 29th, 1942, I show a device of
tending through the tube and communicating
the kind referred to. The object of the present
with the otherwise enclosed air space beneath the
invention is to simplify the construction disclosed
in the aforesaid patent, improve its operation, 10 top of the cell. These slotsare about 3%" in
width and about %" in length, extending below
and reduce. its cost. This is done, according to
the underside of the top 201:‘ the cell approxi
the present invention by eliminating the vent
mately 1/4"..
.
tube, and by substituting a simple disc in the
At opposite sides of the inner wall of the tube
?lling tube for the cup shown in the aforesaid
5 are -' provided grooves 5‘1 extending from the
prior patent. By making the disc tiltable so
top of the tube 5. to a point about 14" below the
that it can be readily removed and to permit
top, and having a rounded lower end adapted to
the insertion of the end of the hydrometer, the
receive pins 6%, 6EL extending'from the periphery
interior of the cell is accessible for ?lling and
of a disc 6 at opposite points of said periphery.
testing the electrolyte and the device can be
The lower ends of the grooves 5.a act as journals
manufactured by mass production methods at a
for the pins 6”“, whereby the disc 6 is rotatably
cost of very little more than batteries not pro
mounted within the tube 5 and may be tilted to
vided with a level control device.
facilitate removal therefrom or the insertion of
Other features of the invention and the ad
the end of the ?lling tube of a hydrometer.
vantages thereof will appear from the following
The disc 6 is made of heavy non-corrosive
description and drawing in which:
material, such as lead, and the pins 63" extend
Figure 1 is a fragmentary plan view of the
therefrom above the center of gravity so that
battery, with the cap removed, showing the ?ll
when it is pivotally mounted in the tube it will
ing opening made in accordance with this in
normally remain horizontal. The upper sur
face of the disc is ?at and. the lower surface
Figure 2 a fragmentary vertical section
is provided with a downwardly extending bulge
through the ?lling opening on the line 2-2 in
6b to provide weight for mantaining the disc. in
Figure 1 showing the cap above the opening.
vention;
.
'
its normal horizontal position. The diameter
of the disc is from %4" to 115" smaller than the
Figure 3 a fragmentary vertical section on the
line 3—3 in Figure 1, with the cap in position
in the ?lling opening;
Figure 4 a fragmentary perspective view of the
?lling opening;
Figure 5 a perspective view of the removable
disc; and
Figure 6 a perspective view of a modi?ed form
of removable disc.
In the drawing like numerals of reference in
dicate corresponding parts in the different
?gures.
The construction of the battery is well known,
and therefore only such parts thereof as are
relative to the present invention are indicated.
A ?lling opening-l is formed in the top of the
battery casing 2. An upwardly extending boss
3 surrounds the ?lling opening, the said boss be
ing threaded internally to receive a cap 4 which
may be of any suitable construction, and which
is shown in Figure 2 above the ?ller opening and
in Figure 3 mounted in the ?ller opening and
screwed into the boss 3.
L0 01
diameter of the interior of the tube 5, so that
there is a space between the periphery and the
disc inside of the‘ wall of the tube averaging
about 82" wide. The upper face of the disc is
about. 5/8" above the lower end of the tube 5.
The space between the periphery of the disc
and the inner side of the walls of the tube 5,
and the openings formed by the slot [6, are 01
such size that when the battery is being ?lled,
when the electrolyte in the cell closes the bottom
of the tube a seal will be formed over said space
and slot, preventing the ?uid being poured into
the battery from running into the cell and caus
ing it to rise in the ?lling passage to the ?lling
opening, indicating that the battery has been
?lled to the proper level.
‘
In actual practice, it is observed that the, seal
over the slot does not occur immediately upon
the electrolyte reaching the bottom of the tube.
When water is poured into the ?lling opening, it
55 goes. through the space between the disc and the
2,408,178
3
4v
tube and a certain amount may run through the
electrolyte in the cell closes the bottom of the
tube.
3. In an electrolyte level control device for bat
teries, a cell having a ?lling opening in the top
thereof, a ?lling tube extending into the cell from
lower ends of the slot. Air is vented through the
upper ends of the slot. When the electrolyte
rises to the bottom of the tube a bubble is formed
thereover, and air is trapped between the bottom
of the tube and the disc forming an air cushion
the ?lling opening and forming a closed air space
which causes a seal to form over the space be
beneath the top of the cell, a disc supported in
the tube spaced from the bottom thereof and be
low the top of the cell, said disc being constructed
tween the disc and the side of the tube prevent
ing the‘ further flow of water therethrough.
When this occurs a certain amount of water con
10 so as to provide a limited passage within the tube
for ?uid from above the disc to pass to :below the
tinues to ?ow through the slots until the elec
disc, and slots extending through the tube from
trolyte has risen about 1A," above the bottom of
a point below the top of the cell to a point adja
the tube around the outside of the tube, when
cent the disc, forming a vent aperture communi
the pressure of air in the top of the cell causes
a seal to form over the slots preventing the air 15 cating between the otherwise closed air space be
neath the top of the .cell and the interior of the
from venting and causing the’water to rise in
_ tube above the disc, said limited ?uid passage and
the ?lling tube indicating that the electrolyte has
vent aperture being of such size that liquid poured
reached the desired level.
I
into the interior of the tube through the ?lling
In Figure 6 is shown a modi?cation in which the
diameter of the removable disc is slightly larger 20 opening will form a seal thereover when elec
trolyte in the cell closes the bottom of the tube.
than in the previous form so that it substantially
4;. In an electrolyte level control device for bat
fully encloses the interior of the tube 5. Extend
teries, a cell having a ?lling opening in the top
ing diagonally through the disc from the upper
thereof, a ?lling tube extending into the cell from
face thereof to a ‘point in the side of the depend
ing bulge portion 6b are two holes l9, l?l which 25 the ?lling opening and forming a closed air space
beneath the top of the cell, a disc supported in
provide a ?lling passage in lieu of the space be
the tube spaced from the bottom thereof and be
tween the sides of the disc and the wall of the
low the top of the cell, ‘said disc being spaced
tube.
.
about 3%" from the walls of the tube to provide
It is thought that the construction and use of
a limited passage within the tube for ?uid from
the invention will be apparent from the above de
above the disc to pass to below the disc, and slots
scription of the various parts and their purpose.
about 1/4” long and 3%" wide extending through
It is to be understood that the form of my inven
the tube from a point below the top of the cell
tion herewith shown and described, is to be taken
to a point adjacent the disc, forming a vent aper
as a preferred example of the same, and that vari
ous changes in the shape, size and arrangement 35 ture communicating between the otherwise closed
air space beneath the top of the cell and the in
of parts may be resorted to, without departing
terior of the tube above the disc, said limited ?uid
from the spirit of my invention, or the scope of
passage and vent aperture being of such size that
the subjoined claims.
liquid poured into the interior of the tube through
What I claim as my invention is:
the ?lling opening will form a seal thereover when
1. In an electrolyte level control device for bat
‘electrolyte in the cell closes the bottom of the
teries, a cell having a ?lling opening in the top
tube.
thereof, a ?lling tube extending into the cell from
5. In an electrolyte level control device for
the ?lling opening and forming a closed air space
batteries, a cell having a ?lling opening in the
beneath the top of the cell, a disc supported in the
top thereof, a ?lling tube extending into the cell
tube spaced from the bottom thereof and below
from the ?lling opening and forming a closed
the top of the .cell, said disc being constructed
air space beneath the top of the cell, a disc sup
ported in the tube about 5/8" above the bottom
for ?uid from above the disc to pass to below the
thereof and below the top of the cell, said disc
disc, and a vent aperture extending through the
tube above the disc communicating between the 50 being spaced about 312" from the walls of the
tube to provide a limited passage within the tube
otherwise closed air space beneath the top of the
for ?uid from above the disc to pass to below the
cell and the interior of the tube above the disc,
disc, and slots about 1/4," long and 3%" wide
said limited ?uid passage and vent aperture being
extending through the tube from a point below
of such size that liquid poured into the interior
the top of the cell to a point adjacent the disc,
of the tube through the ?lling opening will form
forming a vent aperture communicating be
a seal thereover when electrolyte in the cell closes
tween the otherwise closed air space beneath the
the lbottom of the tube.
_
top of the cell and the interior of the tube above
2. In an electrolyte level control device for bat
the disc, said limited ?uid passage and vent aper
teries, a cell having a ?lling opening in the top
thereof, a ?lling tube extending into the cell from 60 ture being of such size that liquid poured into the
interior of the tube through the ?lling opening
the ?lling opening and forming a closed air space
will
form a seal thereover when electrolyte in the
beneath the top of the cell, a, disc supported in
cell closes the bottom of the tube.
_
the tube spaced from the bottom thereof and be
6. In an electrolyte level control device for
low the top of the cell, said disc being spaced
batteries, a cell having a ?lling opening in the
from the walls of the tube to provide a limited
top thereof, a ?lling tube extending into the cell
passage within the tube for ?uid from above the
from the ?lling opening and forming a closed
disc to pass to below the disc, and a vent aper
. air space beneath the top of the cell, a disc sup-_
ture extending through the tube above the disc
ported in the tube spaced from the bottom there
communicating with the otherwise closed air 70 of and below the top of the cell, said disc having a
space beneath the top of the cell and the interior
limited passage extending therethrough for ?uid
of the tube above the disc, said limited ?uid pas
from above the disc to pass below the disc, and
sage and vent aperture being of such- size that
a vent aperture extending through the tube above
liquid poured into the interior of the tube through
the disc communicating between the otherwise
the ?lling opening will form a seal‘thercqv?r when 75 closed air space beneath the top of the cell and
so as to provide a limited passage within the tube
2,408,178
5
the interior of the tube above the disc, said limited
?uid passage and vent aperture being of such
size that liquid poured into the interior of the
tube through the ?lling opening will form a seal
6
thereover when ?uid in the cell closes the bottom
of the tube.
9. In an electrolyte level control device for
batteries, a cell having a ?lling opening in the
thereover when electrolyte in the cell closes the
top thereof, a ?lling tube extending into the cell ,
posite points in its periphery and said tube having
the disc is normally horizontal but may be tilted '
journals formed in its inner wall on which the
pins are mounted to pivotally support the disc
thereon, whereby the disc may be tilted to facili
tate removal of the disc or insertion of the end
of the tube of a hydrometer, and said disc being
being constructed so as to provide a limited pas
from the ?lling opening and forming a closed
bottom of the tube.
air space beneath the top of the cell, a disc in
7. In an electrolyte level control device for bat
the tube below the top of the cell, said-disc having
teries, a cell having a ?lling opening in the top
pins extending from the periphery thereof at op
thereof, a ?lling tube extending into the cell
from the ?lling opening and forming a closed air 10 posite points in its periphery above its centre
of gravity, and said tube having journals formed _
space beneath the top of the cell, a disc in the
in
its inner wall on which the pins are mounted
tube below the top of the cell, said disc having
to pivotally support the disc thereon, whereby
pins extending from the periphery thereof at op
constructed so as to provide a limited passage
Within the tube for ?uid from above the disc to
pass below the disc, and a vent aperture com~
municating between the otherwise closed air space
beneath the top of the cell and the interior of .
to Vfacilitate removal of the disc or insertion of the
end of the tube, of a hydrometer, and said disc
sage within the tube for ?uid from above the disc
to pass below the disc, and a vent aperture com
mimicating between the otherwise closed air space’
beneath the top of the cell and the interior of the
tube above the disc, said limited ?uid passage
being of such size that liquid poured into the
interior of the tube through the ?lling opening ~
the tube above the disc, said limited ?uid passage 25 will form a seal thereover when fluid in the cell
closes the bottom of the tube.
being of such size that liquid poured into the
10. In an electrolyte level control device for
interior of the tube through the ?lling opening
batteries, a cell having a ?lling opening in the top
will form a seal thereover when ?uid in the cell
thereof, a ?lling tube extending into the cell from
closes the bottom of the tube.
;
the ?lling opening and forming a closed air space
8. In an electrolyte level control device for
beneath the top of the cell, a disc of heavy non
batteries, a cell having a ?lling opening in the
corrodible material in the tube below the top of
top thereof, a ?lling tube extending into the cell ,
the cell, said disc having pins extending from the
from the ?lling opening and forming a closed air
periphery thereof at opposite points ‘in its pe
space beneath the top of the cell, a disc in the
tube below the top of the cell, said disc having 35 riphery and said. tube having journals formed in
its inner wall on which the pins are mounted to
pins extending from the periphery thereof at
pivotally support the disc thereon, whereby the
opposite points in its periphery and said tube hav~
disc may be tilted to facilitate removal of the
ing grooves in opposite sides of the inner wall
disc or insertion of the end of the tube of a
thereof extending from the top thereof to a point
adjacent the bottom, in the lower ends of which 40 hydrometer, and said disc being constructed so
as to provide a limited passage within the tube
the pins are mounted to pivotally support the disc
for ?uid from above the disc to pass below the
thereon, whereby the disc may be tilted to facili
disc, and a vent aperture communicating between
tate removal of the disc or insertion of the end of
the otherwise closed air space beneath the top
the tube of a hydrometer, and said disc being con
of the cell and the interior of the tube above the
structed so as to provide a limited passage within
disc, said limited ?uid passage being of such size
the tube for ?uid from above the disc to pass below
that liquid poured into the interior of the tube
the disc, and a vent aperture communicating be
through the ?lling opening will form a seal there
tween the otherwise closed air space beneath the
over when ?uid in the cell closes the bottom of
top of the cell and the interior of the tube above
the tube.
the disc, said limited ?uid passage being of such
JULIUS SANDUSKY.
size that liquid poured into the interior of the
tube through the ?lling opening will form a seal
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