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De‘; 10, 1946.
2,412,491
E. F. ANGELL
FIRE EXTINGUISHER
Filed July 22. 1944
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Patented Dec. 10, 1946
2,412,491
UNITED STATES PATENT OFFIQE»
2,412,491
FIRE EXTINGUISHER
Earle F. Angell, Richmond, Va., assignor to Edgar
C. Bothwell, Jr., Richmond, Va.
ApplicationJu-ly 22, 1944, Serial No. 546,103
1 Claim.
(Cl. 169——26)
2
This invention relates to an improved ?re ex
tinguisher in which a chemical is discharged upon
the heat of fire releasing a spring-pressed ham
. mer or plunger to break a glass or .other frangi
ble seal of the chemical container.
One of the objects of the invention is to pro
vide a ?re extinguisher which may be hung on
the wall of a room; or on the side wall or roof
of a truck’; or in kitchens or similar places where
?re protection is needed, and which will not break
spending parts through the several ?gures of the
drawing.
A distinctive feature of the invention resides
in providing a container for the ?re extinguish
ing chemical and a detachably connected hood
which carries the smasher slug, said. hood also
having a series of openings to provide a nozzle
for more effectively distributing the chemical
when released by ?re. These features may be
10 embodied in the constructions shown in Figs. 1
and 1l.
,
or crack when struck or accidentaly dropped, but
As will be observed from Fig. 1, this ?re ex
will be instantly ready for use in the event of
tinguishing unit primarily consists of a container
?re. In that connection, the invention contem
plates a container for a ?re-smothering liquid
A and a hood B, ?tted to the lower end thereof,
chemical made out of metal, plastic or other nor 15 the said lower or nozzle end of the hood hav
ing a cage or guard C a?ixed thereto, as will
mally non-breakable material, but having an out
presently appear more in detail. Said container
let covered by a frangible or breakable-seal.
A has two exteriorly threaded portions l and
Another object of the invention is to provide a
2 of different diameter. The threaded portion 9
chemical container provided with means for de
tachably connecting it to a hood which carries a 20 is preferably made on a collar or ?ange I2L located
substantially at the junction of the inclined bot
smasher slug, so that the hood and container
tom 3 with the side Wall of the container.
may be readily connected for assembly or discon
The exteriorly threaded portion 2 is located
nected as, for example, when it is desired to re
on the outer face of the neck ‘in of the bottom
place a container or hood, or to effect renewal
of the chemical contents of the container, by 25 3 thereby to receive the internally threaded skirt
portion 4 of a cover ring 5. This ring is intended
way of salvage, in the event that the entire unit
to clamp a glass or other frangible seal 6 over
has not been damaged too badly by ?re to be
the outlet or mouth of the said neck of the con
of further service or use. This arrangement also
tainer.
affords the opportunity of easily resetting the
smasher slug and substituting a new fusible unit. 30
The threads I of ?ange Ia are intended to re
ceive the internally threaded ?ange ‘l of the hood
A further object of the invention is to provide
B. As will be apparent from the drawing, this
the nozzle or lower end of the hood with a guard
hood is preferably of substantially frusto-coni
for the guide stem of the smasher slug to avoid
V cal form thereby to include the tapering side
accidental release thereof if it is unintentionally
struck by moving objects in the room or shifting 35 wall portion 8 and the relatively flat bottom
wall 9. The lower portion of the wall 8 is pro
cargo in a truck.
vided with a plurality of openings ill to form
With the above and other objects in view,
a spray nozzle to permit the escape of ?re extin
which will more readily appear as the nature
guishing ?uid when the seal 6 is broken.
of the invention is better understood, the same
consists in the novel construction, combination, 40 The wall 9 of the hood B supports the smasher
slug designated generally as S. This element
and arrangement of parts hereinafter'more fully
preferably
consists of a lead plunger portion l 1
described, illustrated and claimed.
having a flange !2 and a striking head I 3, together
A preferred and practical embodiment of the
with a brass or equivalent stem M. This stem
invention is shown in the accompanying drawing,
45 is medially notched at opposite sides as indi
in which:
‘
cated at l5. That is to say, two pairs of notches
Figure l is a vertical sectional view of the
may be provided, one adjacent and axially spaced
?re extinguisher constituting the present inven
from the other and angularly disposed at approx
tion.
imately 90°, to provide su?icient longitudinal tol
Figure 2 is a detail view of the smasher slug. 50 erance for the stem to set the spring It by means
Figure 3 is a cross sectional View taken on
of the fusible element F. In other words, two
the line 3-3 of Figure 1.
sets of notches may be provided to afford oppor
Figure 4 is a vertical section of a modi?ed
tunity to easily compress the spring and place '
form of the invention.
the fusible element F in one of the notches even
Similar reference characters designate corre 65 though. there may be some inequalities in the
2,412,491
3
wall 9 and some variation in the overall com
pressed length of the spring coil l6.
As will be seen from Figure 1, the spring l6
surrounds the body of the plunger H and the
stem 14, and is con?ned between the ?ange l2 of
the slug and the inner face of the bottom wall 9
of the hood B when the fusible element F is
4
According to Fig. 4, the container A’ has the
hood B’ attached directly to the neck. That is
to say, the external threads 2b of the neck mate
with the internal threads 2° of the hood B’ which
carries the smasher slug S and the guard C’.
The hood B’ is also provided with an internal
rib B2 or its equivalent which cooperates with
the mouth of the container to clamp the frangible
placed in engagement with one selected pair of
seal 65 in position to receive a. blow from the head
the notches 15.
The fusible element F preferabIy consists of 10 13a of the slug S when the latter is released. The
two arms I‘! and 18 each having a disk like por
tion at one end which is soldered to a circular
plate I9 by a fusible solder I92 which melts at a
slug S is of the same construction shown in Fig. 1.
From the foregoing, it will be seen that the
structural features of the present invention are
given temperature. Thus, the fusible element F
is of substantially hairpin formation. Assuming
bly standpoint, and also afford the opportunity
the hood B is disconnected from the container A,
the spring l6 may be compressed until one of the
notches i5 is accessible beyond the outer face of
the wall 9 of the hood. The arms l1 and iii of
the fusible element F can then be placed astride
advantageous from a manufacturing and assem
by salvaging containers which are not seriously
harmed by ?re, since, in most cases, the ?re ex
tinguishing liquid, namely, carbon tetra-chloride,
usually puts out the ?re before the container it
self is damaged to any appreciable extent.
It will, of course, be understood that the con
tainer A may be provided with an eye or equiva
lent hanger E. As shown, the hanger may be on
the stem It in one-pair of notches l5 and then a
link 20 passed over the upturned ends of said
arms to hold the fuse against lateral displace
top of the container or it may be on the side
ment. The disks are then soldered to the plate
l9. When the solder connecting the arms I"! and 25 thereof. Also, the shape of the container may
I8 melts the arms will fall apart and the spring "
be varied within the scope of the invention as
shown in Fig. 4. That is to say, it may be made
so that its vertical dimension is less than its
transverse dimension to produce a relatively ?at
, contingency arises, the ?re extinguishing con
tents of the container A will spill into the hood, 30 rectangular or circular body to ?t within the
purlins or ribs of the roof of a truck.
and discharge through the nozzle openings ID on“
I claim:
to the ?re.
A ?re extinguisher, comprising, a non-break
As previously indicated, the container A is in
able chemical storage container including a tu
tended to be made of non-breakable material;
for example, aluminum, plastic, or any material’. 35 bular side wall, a downwardly inclined bottom
wall integral therewith, an annular neck at the
which is normally non-breakable. At the time‘ “
lower end of said bottom wall, said neck having
the container A is made, it is provided with the
external threads, 2. cover ring having internal
exterior threads I and 2 which make it possible
threads for engaging said external threads of the
not only to readily separate the container A from
the hood B to set the smasher slug in the hood“; neck, a frangible seal secured to the open end
of the neck by the cover ring, an annular collar
but also permit the cover ring 5 to be removed" "
integral with the junction of the tubular side wall
so that the container may be ?lled with liquid
' and the downwardly inclined bottom wall and
and the cover ring then replaced to secure the
disposed as a dependent continuation of said side
glass or other frangible seal 6 in place.
[6 will be released to urge the head l3 toward
the frangible seal 6 of the container. When this
By making the container A out of non-break-g ,--' wall, said collar being externally threaded, a
able material, breakages incident to use of glass‘ ’
containers of the grenade type are avoided, while,
at the same time, the container is always ready
for use because the frangible seal 6 is always po
sitioned to be struck by the smasher slug although .4
it is protected against accidental breakage be
cause of the shielding effect afforded by the hood
B. Also, the guard C, consisting of the strips d
whose upper ends are secured to the hood, Pro
tects the lower end of the stem 14 against acci: i1
dental displacement.
frusto conical hood having a perforated bottom
portion and an upper internally threaded ?ange
for detachably engaging the external threads of
the collar, a smasher slug supported in the hood,
and fusible means cooperating with the hood and
slug to hold said slug poised for automatic release
to break said. seal.
EARLE F. ANGELL.
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