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Патент USA US3089557

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May 14, 1963
c. a HOLSWORTH ETAL
3,089,547
FIRE EXTINGUISHER GRENADE MOUNTING
Filed June 22, 1961
HNVENTD R5
EARL E. HULSWURTH
THOMAS E. HEILSYVD RTH
__-|.BY
MM,
United States PatentO?ice
1
3,089,547
FIRE EXTINGUISHER GRENADE MOUNTING
Carl E. Holsworth, 610 Division St., Huntington, Ind.,
and Thomas E. Holsworth, 5914 Dearborn St., Indian
apolis, Ind.
Filed June 22, 1961, Ser. No. 118,952
2 Claims. (Cl. 169—26)
,
39,089,547
Patentedv May 14, 1963
2
(not shown) may enter and be carried into the wall. An
encircling wall generally designated by the numeral 13
?ares outwardly from each side of the back wall 11 in
substantially straight lines 14 and '15 respectively to
merge into a generally circular top peripheral portion 15
of the wall 13'. From this peripheral portion 15‘, the
wall ‘13 slopes inwardly and downwardly to a base 16
which is generally ?at or planar, the rear edge portion of
This invention relates to a ?re quenching device
which merges into the vbottom of the back vwall -1\1. Pref
wherein there is a grenade element containing a non 10 erably there is a groove or valley 17 around the bottom
freezing liquid which upon ‘being spread about the ?re
16 ‘between it and the lower ends of the wall 13.
area vaporizes and quenches the ?re.
The lower portion of the curving wall 13 adjacent the
The grenade itself is in common usage and normally
base 16 is provided with a plurality of perforations 18.
consists of a glass walled vessel wherein there is a
A post 19 slidably passes substantially vertically
spheroidal base portion from ‘which extends a frusto 15 through the base 16 and has an upper head extending
conical section, this section terminating in a more or less
angularly and outwardly therearound and ?xed thereto.
cylindrical neck which is closed over at the end removed
from the section by a frangible wall normally made of
thin glass.
These grenades have been supported in a space to be
protected against ?re by a large number of means, gen
erally consisting of a wall bracket carrying the grenade
in an upside position with the cylindrical or neck section
directed downwardly and into the path of a plunger
Between the head 20 and the topside of the base 16 is a
coil spring 21 resting ‘by its lower end against the ?oor
16 by its upper end under the head 20, surrounding the
post 19, FIG. 4. A pair of ?ngers 22 and 23 are inserted
freely through a slot 24 extending longitudinally through
a restraining clip 25. These ?ngers \22 and ‘23 are carried
from the clip 2-5 through notches 26 and 27 on opposite
‘sides of the post 19‘ below the ?oor .16, FIG. 4, and on
which is employed to fracture the cover to permit out 25 beyond to each have a portion 28 and 29 overlapping one
3 another at a distance from the post 19‘, FIGS. 5 and 6.
These two members ‘28 and 129‘ are fused together by a
and described in one particular form to provide a sup
low melting material which readily melts at temperatures
port for the grenade in a very simple and yet most ef
at the kindling temperatures of materials being protected
fective manner which ‘will retain the section closure at
against ?re damage. ‘In other words, these two members
all times in close proximity to and directly over the
28 and 29 are pulled one over the other sufficiently to
breaking plunger. In some supporting devices, the ‘ retain the ?ngers 22 and 23‘ in engagement with the post
grenade is not always supported to have the breakable
19 across the notches 26 and 27 in a leverage action
closure presented by a breakable area directly over the
.whereby the two ?ngers 22 and '23 bear against the outer
?owing of the ?uid from the grenade.
It is the object of the present invention herein shown
plunger, and the grenade frequently may shift its posi
tion particularly when some house cleaner dusts the up- - ‘
per'side of the grenade and might accidentally rock the
grenade in its holder.
.
It is the object of the present invention to prevent rock
ing of the grenade after it is placed within the holder,
and also to presentthe breakable cover properly toward
the breaking plunger.
These and many other objects and advantages of the
.end portions of the slot 24. ‘Preferably the outer free end
portions of the ?ngers 22 and 23 are bent in reverse di
rections so as to prevent the tip 25 from sliding free of
,the ?ngers until the bonding fuse material melts between
the end portions 28 and 29.
The spring 21 is su?iciently compressed to urge the
clip 25 up against the underside of the bottom 16, FIG.
5, so that there is sui?cient energy stored up in the spring
21 to ?re the plunger 19‘ vertically upwardly with con
invention including simplicity and ease of manufacture as
'siderable force.
well as the low cost of manufacturing, will become ap 45
So much of the device described is well known to
parent to those versed in the art in the following descrip- I “ those. versed in the art. vA grenade generally designated
tion of the one particular form of the invention as illus
.‘by the numeral '30 has a spheroidal base section or por
trated in the accompanying drawings, in which—
tion 31 from which there is a frusto-conical continuing
FIG. 1 is a view in front elevation of a grenade hold
ing bracket structure to which the invention is applied; 50 portion 32 terminating in a cylindrical neck '33, the out
side end portion of which is covered over by a breakable
FIG. 2 is a'top plan view of the bracket only and on
cover 34, usually glass fused over that opening into the
‘an enlarged scale;
v‘wall of'the grenade 30 which is also normally made of
FIG. 3 is a vertical section through the bracket on the
glass. Before the sealing operation, the extinguishing
line 3-—3 in FIG. 2;
55 ?uid is placed Within the grenade 30 with the neck 33 in
FIG. 4 is a detail in vertical elevation and partial sec
an upwardly directed position. This grenade 30' is in
tion of the grenade breaking plunger and operating
verted in placing it Within the bracket 10 to have the
mechanism;
cover portion 34 positioned over the head 20 of the
FIG. 5 is a detail in vertical section of the lower fuse
plunger 19 as indicated in FIG. 3. Within the bracket
member normally retaining the plunger in an inopera
tive position;
10 there is formed a spheroidal section pad 35 centrally
FIG. 6 is a view in transverse section on the line 6-—6
of the wall 13 opposite the back Wall 11, and extending
in FIG. 5; and
downwardly from the top periphery 15, this pad 35 being
FIG. 7 is a top plan view of a grenade locating
formed to the contour of the grenade 30 to provide a
member.
65 partial seat for the forward side of the grenade. This
A bracket generally designated by the numeral 10 is
pad being curved to ?t the contour of the side wall of
made out of any suitable material preferably rigid, and
the grenade serves to prevent rolling of the grenade on
usually plastic molded to shape. This bracket 10‘v ‘has a
its central axis in conjunction with the contact of the op
vertical back wall 11 which is normally presented to a
posite side of the grenade 30 with the back wall -11. Also
wall (not shown) for support. Said support may be of 70 in most cases, the juncture of the neck 33- and the closure
any desired construction, herein shown as a hole 12
34 designated by the numeral 36 can ‘bear against the
through which some attaching member such as a screw
back wall 11, against a thickened portion 37 normally
3,089,547
provided with an arcuate face directed toward that junc
ture 36.
However one other possible action of the shifting of
the grenade 30‘ in the bracket 10 is quite possible and
sometimes happens unless further provision is made to
prevent that shifting.
4
once the cover 34 is broken, the ?uid will flow
down within the bracket 10 onto the ?oor '16 and around
the groove 17 and ?ow out the perforations 18 so that
this ?ow is retarded to permit vaporization and at the
same time permit some of the ?uid to be immediately
available outside of the bracket 10 for vaporization in
To this end, there is provided the horseshoe washer
38 planar in shape and having an opening 39 to allow
the legs 40 and 41 of the washer 38 to straddle the neck
the atmosphere within the space where the ?re occurs.
Therefore while we have shown the invention in the
one particular form, it is obvious that structural changes
33 closely, and with the grenade 30 in the diagonal posi 10 may ‘be employed, without departing ‘from the spirit of
the invention, and we therefore do not desire to be
tion shown in FIG. 3, contact the juncture of the frusto
limited to that precise form beyond the limitations which
conical portion of the wall and the neck 33 at the junc
may be imposed by the following claims.
tion 42, by the circular inner end portions 43 between
We claim:
the legs 40 and 41.
1. Means loosely self-locating a container of ?re
This washer 38 may be made an integral part of the 15
quenching liquid having essentially a spheroidal body
bracket v10, but more conveniently and more cheaply is
from which a frangible ended neck extends, comprising
made as a separate part. The outer contour of the
an upper open ended bracket having a back suspending
washer 38, designated by the numeral 44 is in close con
wall, a ?oor, and a front and side enclosure extending
tact therearound With the sloping wall 13. The ends of
the legs 40 and 41 are straight lines in the present show 20 forwardly from the side of said wall and said floor in an
inverted, approximately conoidal shape; an arcuate sur
ing, and will bear against the back Wall L1. The brack
faced seat within said enclosure adjacent the upper end
et 10 is provided with a pair of abutments 45' and 46 on
thereof opposite said back wall and shaped to conform
the back wall 11 on the top ends of which rest the free
to and surround a limited area of said spheroidal body
ends of the legs 40 and 41. This washer is preferably
?xed in position to the bracket 10 by any suitable means 25 spaced essentially primarily below the major transverse
diametrical plane of the body with the opposite side of
where it is made separately, such as by some adhesive or
the body riding against said back wall whereby the body
cement applied to at least a limited zone around the pe
is retained against rolling laterally across said wall, and
riphery 44 and to the end portions of the legs 40 and 41.
said neck is directed downwardly within said bracket; a
Now with the neck portion 33 inserted through the
opening 39‘ of the ‘washer 38, the grenade can not rock 30 washer in the nature of a diaphragm having a contour
following that of said conoidal wall at an elevation
fore and aft in relation to the ‘bracket 110, and neither
spaced above said ?oor and below the spheroidal body
can it rock laterally of the bracket, that is in directions
substantially parallel with the back Wall 11.
With this horseshoe washer 38 combined with the
and extending approximately horizontally to abut said
ing cover '34 to break the cover 34 rather than causing a
vertically supported by hearing downwardly on the inner
back wall; said ‘washer being slotted a distance from said
bracket 10, the grenade 30‘ may be lowered within the 35 back wall and of that width which receives said neck
therethrough freely and limited in length to direct the
bracket 10 with a feeling of security that the lower
neck substantially against said back wall with a central
frangible cover 34 will not come into abrupt contact with
axis through the neck and the body inclined outwardly
the post head 20 and thereby release the ?uid accidental
and upwardly from said back wall; and a heat triggered
ly. With the inclined position of the grenade 30 as in
dicated in FIG. 3, the head 20 of the ‘bolt 19 when the 40 plunger carried by said floor in alignment with said neck
end; said bracket being perforate adjacent said ?oor.
members 28 and 29 are released ‘by suf?cient heat being
applied to melt the fusing material, will strike the clos
2. The structure of claim 1, in which said washer is
shifting of the grenade 30 in reaction to the blow of the
periphery of said conoidal wall.
head 20. The grenade 30 cannot rock in any direction 45
References Cited in the ?le of this patent
axially under this head impact, and that grenade 30 can
not be placed within the bracket 10 incorrectly in respect
UNITED STATES PATENTS
to the locating of the cover 34 in reference to the head
20.
Therefore it is to ‘be seen that we have provided an 50
extremely simple device of considerable importance in
the mounting and holding of these ?re ?ghting grenades
which normally will be in position over period of years
without being used, but which must always be ready for
immediate action and a positive action when the ?re 55
occurs. It is to ‘be pointed out that in the normal action,
1,870,872
_
Roessner _____________ __ Aug. 9, 1932
1,898,476
Banes ______________ __ Feb. 21, 1933
1,916,351
2,082,090
2,127,395
2,470,371
2,607,429
Whitman ____________ __ July 4,
Wittig _______________ __ June 1,
Evans ______________ __ Aug. 16,
Roessner ____________ .._ May 17,
Schnoir ., ___________ __ Aug. 19,
1933
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1938
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