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Oct. 1, 1946.
Filed March»28, 1945
Patented Oct. 1, 1946
:Edward, M. , Shinkle, Burlington, vIowa
Application ,March 28, 1945, Serial, No. ‘585,314
:2 Claims. (0]. 102-64)
through opening 3 after installation of the vfuse.
The fuse assembly comprises a housing 1 which
is screwed into threaded opening 6 and ‘has a
of this character havinga fuse adapted to oper
shoulder 8 bearing'against the gasket 9. The in
ate upon impact to explode or detonate the
charge in the grenade.
c1 termediate member I 0 of the fuse assembly is
threaded onto the lower end of the housing 1 and
Grenades as generally constructed are pro
is provided with a conical seat I ! opposite a sim
vided with time or delay fuses set in'operation by
ilar seat 12 formed in the lower portion of the
the ‘thrower of the grenade. Usual types of fuses
housing 1.
function upon the release of a lever or handle to
Themovable operating portion of the fuse com
start the‘fuse action prior to or upon throwing 10
prises the ball portion l3 having the threaded
the grenade. These constructions have the ob
stem l4 upon which ‘the weight I5 is ?rmly
jection that the delay vaction of the fuse may be
screwed. The upper portion of the weight I5 has
sufficient to permit persons at whom the grenade
a tapered surface It to permit greater angular
is thrown either to ‘throw back the grenade or to
dispose of it prior to the explosion. If the user 15 displacement of the weight in the cavity I‘! of the
fuse housing 1. It will be apparent that the ball
of the grenade attempts to avoid this by holding
portion It! forms 'a ball and socket joint with
the grenade for a period of time after the fuse
the conical seats H and i2, its angular displace
starts to function, there is danger of holding it
ment being limited by engagement of the weight
too long or from an abnormally short time ele
20 55 with the walls of the cavity H.
ment in the fuse.
The open end of cavity l7 isnormally closed by
It is van object of the present invention topro
the cap l8, having the lug l9 ?tting into the bore
vide an improved grenade and fuse therefor
25) in the upper end of the weight I5. The com
adapted to function uponimpact.
pression spring 2| is ?tted into bore 20 and en
It is a further object to provide a device of this
gages lug l9 to urge the cap l8 upward to free
character which is "safe to handle and to throw
theweight IS. The fuse is provided with the safe
and which will explode upon impact regardless of
ty wire 22 passing through aligned openings in
the position in which it may falland of the nature
the housing ‘Land .Qap I8 to retain the cap in
of the material'stopping its flight.
'This invention relates'to a new and improved
hand grenade and more particularly to a grenade
Itis also an object to provide'a grenade and
fuse'therefor-which are simple in design and con
place against the pressure of spring 2 i. The pull
30 ring 23 is connected to the safety wire 22 for use
struction and adapted for commercialv produc
in ‘removing the wire.
Other and further objects will appear as the
provided with a concave outer ‘face to facilitate
holding it in place by means of the thumb or
description proceeds.
?nger after the safety wire has'been withdrawn.
I have shown a preferred embodiment of my
invention in the accompanying drawing in which
the single ?gure is a vertical cross section through
the grenade and fuse,
In the drawing the body of the grenade has
been shown at i, this body being provided with
ribs 2 which enable the user to get a better grip
thereon or to prevent slipping in the hand when
wet or muddy. These ribs or other suitable con
?guration may also increase the e?iciency of the
fragmentation of the body when the grenade ex
plodes. The lower portion of the body I is pro
vided with a threaded opening 3, closed by a plug
4, bearing against the gasket 5. This opening 3 .
may be eliminated if the grenade is ?lled with
an explosive which sets in solid form after being
poured into the grenade since such as explosive
may be poured in through fuse opening 6 formed
in the opposite side of the grenade prior to in
stallation of the fuse. When a loose or granular
The cap I 8 is shown as
The ball portion I3 has a cylindrical recess
formed therein to receive the ampule 24 which is
cemented in place therein. The ampule is made
of glass or similar acid resistant and readily
frangible material. The ampule 24 is of such size
as to clear the circular shoulder 25 at the lower
edge of the conical seat I I.
The washer 26 is seated in a recess formed in
the intermediate member ID below the shoulder
25. This washer 2B is formed of sponge rubber,
felt or other relatively soft and pliable material
and ?ts closely about the ampule 24. Its primary
function is to retain in place the chemicals 21
in the cavity 28 in the lower end of intermediate
member ID and to prevent them from working up
into the ball and socket joint during transporta
tion or movement of the device. The washer 26
has the secondary function of forming a soft bed
for the ampule 24 while at the same time not
explosive is used, it may best be introduced 55 being sufficiently rigid to materially restrain
movement of the ampule when the ball and socket
joint is freed for operation of the fuse.
The lower end of the intermediate member ID
has the closing plug 29 threaded thereon, the
joint being provided with the gasket 30. The
detonator 3| is held upon the plug 29 by means
of the cup 32 which is peened or staked to the
of my invention, it is to be understood to be illus
trative only as it is capable of modi?cation and
change to meet varying conditions and require
ments within the scope of the appended claims.
I claim:
1. In a grenade or the like, a grenade body,
a fuse assembly ?tted therein, the assembly com
prising a housing member and an intermediate
member having opposed seats formed therein, a
ball ?tted on said seats, a weight secured to the
While my construction of grenade and fuse can
be used with various types of chemical igniters
and detonators, it has been found that a suitable
ball, the housing member having a cavity formed
mixture for the ampule 24 comprises approxi
mately 75 parts of sulphuric acid and 25 parts of
orthonitrotoluene. The chemicals in'dry pow
, therein enclosing the weight and permitting lim
ited movement thereof, a removable closure for
dered form at 27 may comprise a mixture of ap
the cavity engaging the Weight and preventing
15 movement thereof, a frangible ampule secured to
proximately 55 parts of potassium chlorate and
45 parts lead sulphocyanate. When the liquid
the ball normally spaced from adjacent fixed por
tions of the fuse, chemical means in the ampule
from the ampule comes in contact with the pow
and additional chemical means carried adjacent
dered chemicals, the reaction is such as to ignite
the ampule, the two chemical means when
the priming in the upper part of the detonator. 20 brought into contact serving to initiate an explo
The priming in turn ignites the initiator such as
sion of the grenade, the size relationship between
lead azide or fulminate of mercury immediately
the weight and its enclosing cavity being such
adjacent the priming in the. detonator. The det
that the weight upon release may move suffi
onator sets off the explosive ?lling the grenade
ciently to swing the ampule against adjacent ?xed
and causes it to explode or detonate depending H portions of the fuse and break the ampule to
on its character.
release its contents.
In use, the grenade is grasped in the hand with
a thumb or ?nger holding the cap is ?rmly in
2. In a grenade or the like, a grenade body,
a fuse assembly ?tted therein, the assembly com
prising a housing member and an intermediate
place against the spring 2! while the safety wire
is Withdrawn by means of ring 23. The gre iii) member having opposed seats formed therein, a
nade is then thrown to hit as nearas possible to
the point where theexplosion is desired. While
in the hand of the thrower the grenadeis safe
as long as the cap 18 is held in place since the
lug l9 remains engaged in its socket in weight 15
to restrain the Weight against lateral swinging
ball ?tted on said seats, a weight secured to the
ball, the housing member having a cavity formed
therein enclosing the weight and permitting lim
tied movement thereof, a cap closing the cavity,
removable securing means for positively main
taining the cap in closing position, inter?tting
As soon as the grenade leaves the
means on the cap and weight whereby the cap
thrower’s hand, the spring 2i ejects the cap I8
and thus leaves the weight l5 and the ball l3
in closing position holds the weight against swing
ing movement, spring means adapted to force the
carrying ampule 25 free to move until the weight 40 cap out of engagement with the weight-upon re
strikes the wall of the bore ll. When the grenade
lease of the cap, a frangible ampule secured to
strikes any solid object the weight 15 will swing
the ball normally spaced from adjacent ?xed
to its limit of movement, striking the ampule
portions of the fuse, chemical means in the am-v
against the shoulder 25 in the intermediate mem
pule and additional chemical means carried ad
45 jacent the ampule, the two chemical means when
ber I9.
The breaking of the ampule 24 against shoulder
brought into contact serving to initiate an ex
25 releases its contents upon thechemicals at 2,1
plosion of the grenade, the size relationship. be
and the reaction causes the explosion to take
tween the weight and its closing cavity being such
place immediately. The sensitivity of the mech
that the weight upon release may move sul?
anism can be controlled within limits by varying v
ciently to swing the ampule against adjacent ?xed
the size of the weight l5, the strength of the
ampule 24, the diameter of the balland socket
joint and the e?ective lever arms.
While I have shown .a preferred embodiment
portions of the fuse and break the ampule to
release its contents.
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