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Патент USA US2404777

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Jmiy 30,_ 1946‘.
w. s. GAINES
Filed Jan. 29, 1942
2 Sheets-Sheet 1-’
- 17¢ YMW @MS
July 30, 1946.
Filed Jan. 29, 1942
2 Sheets-Sheet 2
Patented July 30, 1946
Walter S. Gaines, Chagrin Falls, Ohio, assignor,
by mesne assignments, to Republic Industries,
Inc., New York, N. Y., a corporation of Delaware
Application January 29, 1942, Serial No. 428,731
1 Claim.
(01. 220-61)
This invention relates‘ to containers and par
ticularly to containers of the class havingr walls
coated with vitreous enamel, and provided with
closures Operable to close and seal, or open, the
One of the particularly useful applications of
Fig. 1 is an elevational view of a container of
the fire extinguisher type embodying my inven
tion and with a part broken away for convenience
of illustration;
Fig. 2 is a top plan view of the embodiment of
Fig. 1;
the invention herein to be described is to the con
Fig. 3 is a sectional view taken from the plane
tainers of chemical ?re extinguishers; and the
3—3 of Fig. 1;
invention will therefore, for illustrative purposes,
Fig. 4 is a bottom plan view of the embodiment
be described herein as applied to that use, al 10 of Fig. 1;
though as Will become apparent hereinafter some
Fig. 5 is a. fragmentary longitudinal sectional
of the features of the invention, such for example
view. of a lower corner of the container of Fig. 1,
as the container closure, are applicable to other
and the View may be referred to the plane 5—5
classes of containers.
The corrosion-proof properties of a vitreous
enamel-coated container adapts it obviously to
the ?eld of chemical fire extinguishers, but its
application to such use introduces problems to
of Fig. 4;
Fig. 6 is a view similar to Fig. 5 but referred
to the plane 8-6 of Fig. 4;
Fig. 7 is a View illustrating a part which is
> broken away from Fig. 1;
be solved, the most dif?cult of solution being the
Fig. 8 is a sectional view to enlarged scale ap
provision of a practical corrosion-proof closure 20 proximately full scale, taken from the plane 8—8
which can be manually operated to seal the con
of Fig. 2 ;. and
tainer after it has been charged and to unseal
Fig. 9 is a View similar to Fig. 8 showing a part
it and seal it again repeatedly when the charge
in a different operative condition.
is to be renewed. The problems arise from the
Referring now to the drawings, Figs. 1 to 9
fact that the vitreous enamel coating prohibits .25 inclusive, there is shown generally at I the main
the use of the usual conventional simple threaded
body wall of the container, the upper end of
closure, because it is diilicult if ‘not impossible to
which is Open, and terminating in an outwardly
coat the wall of the container so as not to leave
?aring ?ange i’, which for purposes to be de
bare corrodable metal adjacent the threads, and
scribed, is generally of frusto-conical form; and
because when the wall of the container is made
preferably, between the main body and the ?ange
of thin steel for purposes of ‘economical manu
2, the diameter of the body is reduced to_form
facture, threads of sui?cient depth and strength
cannot be formed on it; and if the thin steel
enamel-coated wall is put under any considerable
bending stress by operating the closure construc
tion, it will crack the enamel coat and destroy its
corrosion-proof usefulness.
a, neck 3.
For purposes of economy the wall of the body
is fabricated from sheet steel; and to render the
inner wall surfaces corrosion-proof, they are
coated with vitreous enamel; and for the sake
of appearances as well as to avoid discoloration
It is therefore among the objects of the present
and rust, the exterior surfaces of the body are also
coated with vitreous enamel, and to this end the
To provide generally an improved enamel
enamel coat is preferably continuous over the in
40 ner
coated steel container;
and outer surfaces of the body wall.
To provide an enamel-coated steel container
The lower end of the body is closed by a bot
having an improved sealing closure which may
tom 3, press-formed from sheet steel, and inserted
be opened and closed;
within the side wall ! of the body and sealedly
To provide generally an improved sealing clo £15 joined thereto as will be described.
sure for enamel-coated containers;
The enamel coat on the outside of the body wall
To provide an improved construction of ?re
6, neck 3 and flange 2 is shown at 5, Figs. 5 and 8,
extinguisher container and closure therefor;
and on the inside thereof at 6; and the enamel
To provide an improved construction of sealing
coat on the inside and outside of the. bottom
gasket for the closure of a container.
ll is shown, in Fig. 5, at 1 and 8 respectively.
Other objects will be apparent to those skilled
‘ The bottom wall, which as shown in Figs. 1 and
in the art to which the invention appertains.
5 is 01‘ downwardly concave dished form, has a
The invention is fully disclosed in the follow
peripheral skirt or ?ange 9 telescoped into the
ing description taken in connection with the ac
lower end of the side wall I. The juncture be
companying' drawings in which,
.55 tween this skirt and side wall is indicated gen-.
carrying at their upper ends a pair of-ring sectors
2!l--20, one of the ring sectors having connected
erally in Fig. 5, and may be variously constructed
and constitutes no essential part of the present
invention, and one particular method of making
this form of juncture is illustrated and described
more completely in the co-pending application of
Gaines and Meyers, Serial No. 390,631, ?led April
26, 1941 to which reference may be had. But it
may be noted here that the skirt 9 of the bottom,
and the lower portion of the side wall I, are in
thereto a loop hanger 21.
Each of the sectors I6, its posts Ill-l9, and its
ring sector 22, may be formed all in one piece
either by casting the same or by welding the parts
thereof‘ integrally together; and the purpose of
making two such assemblies separate from each
other as described and as plainly indicated in
tegrally connected by welding material at 10 ; and 10 Figs. 1 to 3, will now be considered in connection
that the outer enamel coats 5 and -8, Fig. 5, may,
if desired, be formed continuously over the weld
ing material I8; and that between the body wall .
I and skirt 9 is corrosion-proof seal of glasslike
material integral with the inner enamel coats 6 .15
and ‘I on the side wall and bottom; whereby the
juncture is made mechanically rigid and strong >5 .
with the closure for the upper end of the con- _
At 22, see Fig. 8, is a cover element, preferably
in the form of a steel disc, enamel coated inside
and outside as at 23 and 24 respectively. The pe
ripheral portion 25 of the disc slopes oppositely
to the slope of‘ the ?ange 2, and this may‘ con
- veniently be provided by making the disc 22 of
dish form; and preferably the cone angle of the
20 cover portion 25 is made approximately the same
are not protected by corrosion-proof material.
as the cone angle of the frusto-conical ?ange 2
To further protect the juncture, and to give it
and whereby there is no point on the inner wall
surfaces of the container at the juncture that
a more ?nished appearance, and to cushion it
of thebody.
the lower end of the container, which, as will be
apparent from Figs. 1 and 5, is generally tubular,
is embraced by a channel of rubber or like mate
rial l2, pro-molded to shape and pressed upon
and gripping the said tubular end of the con
tainer, see Figs. 5 and 4.
The inner confronting portions of the sectors
Iii-l6 are generally of channel form, as plainly
shown in Fig. 8, the ?anges of they channel hav
ing'frusto-conical surfaces 26—26 and 21—2'| cor
responding approximately to the form of the
against shocks which might crack the enamel in
the event that the container is roughly handled,
frusto-conical ?ange 2 and disc portion 25 re
With such a construction, and as will now’
It is usually desirable to provide containers of
be apparent, when the bolts l8—|8, referred to
this ?re extinguisher type with a handle grip on
or within the bottom thereof, and such a handle
in connection with Figs’. 1 and 3, draw the sec
tors I6--l5 toward each other, the peripheral
or grip is shownat 13 Figs, 1, ‘l, 6. It consists of _
portion 25 of the cover ‘will be drawn towardthe
?ange 2 with a wedging action; and this is uti
a strap or rod of metal extending diametrically across and within the downwardly concave bot
lized to mount the cover 22 on the container and
to seal it upon the ?ange 2 as follows.
tom 4; and the end portions l4 thereof are in
Referring to Fig. 9, a gasket or sealing device
tegrally joined to the bottom structure as shown
shown generally at 28 is made of pliable, yield
in Fig. 6, the said end portions 14 being bent down¢ ,
able, corrosion-proof material, and preferably of
wardly to lie generally parallel to the skirt 9 of
a malleable metal ‘such as lead. The gasket 28
the bottom, and the lower end thereof being in
is preformed from sheet material into the general
tegrally joined to the skirt 9 and the side wall
form of ‘ an annulus, and comprising axially
I by the welding material ill. The rubber chan
aligned tubular portions 29 and 3f); integralwith
nel l2 embraces the end portion IA of the handle
an intermediate portion 3| extending inwardly
asshown in Fig. 6.
radially, and which in cross-section is of loop
Projecting from the side of the container and
form as shown in Fig. 9.
integrally joined with the side wall I is a tubular
Before putting on the cover 22, one of the tu
spout i5 over which the usual ?exible hose of the
bular portions, for example the tubular portion
?re extinguisher may be telescoped and attached;
and as will be understood without further illustra 50 30 is telescoped downwardly over ‘the ?ange 2,
and ‘is of such internal diameter as to substan
tion and description, such spout will be attached,
tially ?t the periphery of the ?ange. The loop
for example by welding, to the wall I before the
3| then lies upon the enamel coat 6 of the flange;
enamel coats are applied whereby the spout may
The cover 22 is then put into position by tele
be enamelled both inside and‘outside with enamel
coats continuous with the outside and inside 55 scoping it within the other tubular part 29 of
the gasket as shown in Fig. 9, and substantially
coatsof the body; such a spout being shown in
?ts therewithin, and rests upon the loop 3|
detail in Fig. 7 and illustrated as broken off in
of the gasket. The tubular portions 29 and 30
Fig l.
are then bent inwardly and caused to conform
Custom and commerce demand that the upper
end of a ?re extinguisher of this class be provided 60 respectively to the enamel coats 24 and 5 exter
nally of the cover 2| and ?ange 2, being ?nally
with an annulus or ring which serves both as a
in the condition shown in Fig. 8.
carrying handle, and as a support upon which the
The wedging sectors IB—IB are then put into
?re extinguisher may stand when turned upside
the position of Fig. 8 and the said bolts l8 are
down for use; and a hanger by which it may be
mounted in the ears IT as described for Figs. 1
supported right side up on a hook or the like when
and 3, and the bolts 18 are then drawn up tight
not in use; and a closure to seal the container;
and these features which have been incorporated I ly, drawing the sectors Iii-l6 toward each other,
causing them to exert the aforesaid wedging ac
in the present invention will now be described.
The closure, externally considered, and as ,, tion. The wedging action, as will be apparent,
shown in Figs, 1, 2, and 3, comprises, a pair of 70 tightly clamps the walls of the loop 31 together‘
upon each other and thereby rigidly mounts the
arcuate sectors l6—i 6, having'each a pair of lugs
cover 22 on the container end. It will also be ‘
or cars l'l—~ll by which they may be clampingly
observed from an inspection of Fig. 8 that the
drawn toward each other by bolts l8-—l8. Ex
enamel coats on both the outer and inner walls
tending upwardly from the sectors is a plurality
of posts 19-49. preferably two to each sector I6, "15 of both the ?ange 2 and the cover element 22
are subjected to the wedging pressure and this
produces liquid and pressureproof seals thereat;
and that these coats are protected from being
mutilated or cracked by the pressure, by the
yieldable property of the gasket material.
Various materials may be used for the gasket,
but as stated, lead is preferred because it is cor
While all of the advantages and improvements
set forth hereinbefore may be embodied in a
container and closure having enamel coated walls,
some of the advantages and improvements may
be utilized in containers and closures in which
the walls are not coated at all, or in which they
are coated with coatings that are not non-cor
rosion~proof, and because, being malleable, it may
readily be bent to conform to the frusto-conical
The invention is not limited in all of its fea
shape of the cover and the flange, when the cover 10 tures to the exact details of construction illus
is put on as described, so that this operation may
trated and described. Changes and modi?cations
be performed by hand; and because it will retain
may be made within the spirit of the invention
its original form of Fig. 9, which facilitates the
without sacri?cing its advantages and within the
assembling operation.
scope of the appended claim.
To unseal the container and remove the cover
I claim:
22 for the purposes mentioned, the portion 29
A sealing closure for the opening of a steel
of the gasket, after removing the clamping sec
walled vessel having an outwardly and upward
tors Iii-46, may be again bent ‘upwardly into
ly ?aring frusto-conical ?ange surrounding the
tubular form, and the cover 22 then lifted out;
opening, and a coat of vitreous enamel on the
and after the charge in the ?re extinguisher has ‘ inside of the vessel extending outwardly over
been inspected or renewed, the cover may be
the ?ange; a yieldable sealing gasket of gen
again replaced and the gasket again restored to
erally annular form having its mid-zone folded
its sealing condition and the Wedging sectors
inwardly on such enamelled ?ange and its lower
I6--l 6 again assembled and drawn up tight. And
margin turned under the ?ange; a cover over
in this manner the cover may be unsealed and
lying the opening and having a peripheral frusto
removed and again put on and sealed, repeatedly,
conical portion; a coat of enamel on the portion
the malleable property of lead, when lead is used
of the cover engaging the gasket, said gasket hav
for the gasket, providing the durability desirable
ing its upper margin folded over onto the top
in the gasket when thus repeatedly formed and
of the cover; and means to force the cover to
3 0 ward the opening to sealingly press the margins
It will be observed that notwithstanding that
of the gasket against the under surface of the
seal is effected by pressure engagement between
flange and the top surface of the cover and press
the gasket and the enamel coats on the container
its mid-zone between the enamel-coated surfaces
and the cover, it is effected in such manner that
of the ?ange and cover.
there is no liability that the steel coated parts- I’
will bend and crack the enamel.
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