U.S. patent number 3,683,815 [Application Number 05/086,443] was granted by the patent office on 1972-08-15 for frangible glass grenade.
This patent grant is currently assigned to The United States of America as represented by the Secretary of the Army. Invention is credited to Roy E. Shaffer.
United States Patent |
3,683,815 |
Shaffer |
August 15, 1972 |
FRANGIBLE GLASS GRENADE
Abstract
An improved munition and method for controlling riotous
conditions; the iovement being the utilization of a frangible
container for the munition.
Inventors: |
Shaffer; Roy E. (Bel Air,
MD) |
Assignee: |
The United States of America as
represented by the Secretary of the Army (N/A)
|
Family
ID: |
22198598 |
Appl.
No.: |
05/086,443 |
Filed: |
November 3, 1970 |
Current U.S.
Class: |
102/368 |
Current CPC
Class: |
F42B
12/76 (20130101); F42B 12/50 (20130101) |
Current International
Class: |
F42B
12/50 (20060101); F42B 12/02 (20060101); F42B
12/76 (20060101); F42B 12/00 (20060101); F42b
027/06 () |
Field of
Search: |
;102/6,65,66,90 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Pendegrass; Verlin R.
Claims
I claim:
1. In a munition adapted to deliver a payload to a target area
having a plurality of components comprising a plunger assembly, a
striker means, and a safety pin means; the improvement in
combination with the components being a container means made of a
frangible material and the striker means being a material which is
harder than the container material, said frangible material being
glass having a density of 2.46 gms/cc, a softening point at 880
.degree. C, and a strain point at 583.degree. C adapted to be
fragmentized into particles having no sharp edges and to prevent
wound injuries.
2. The munition of claim 1 wherein the munition is a grenade.
3. The munition of claim 1 wherein the glass has been chemically
treated.
4. The munition of claim 3 wherein the chemical treatment is by hot
alkali metal bath.
5. The munition of claim 1 wherein the glass has a 1.65 .times.
10.sup.3 psi at 25.degree. C strength to weight ratio modulus of
rupture to specific gravity, a 10.3 .times. 10.sup.6 psi at
25.degree. C Young's Modulus of Elasticity, a 4.3 .times. 10.sup.6
psi at 25.degree. C shear modulus, a 40,000 psi modulus of rupture
standard sandblast abrasion, and a 590 Kg/mm.sup.2 Knoop
hardness.
6. The munition of claim 1 wherein the striker means material is a
diamond.
7. The munition of claim 1 wherein the payload is a chemical
agent.
8. A method of controlling riotous conditions by disseminating a
chemical agent from a frengible container comprising the steps of
removing a safety pin from a grenade having a frangible container,
said frangible material being glass having a density of 2.46
gms/cc, a softening point at 880.degree. C, and a strain point at
583.degree. C adapted to be fragmentized into particles having no
sharp edges and to prevent wound injuries; throwing the grenade to
a riotous target area; striking the container with a striker means
on impact of the grenade with a surface to cause the container to
be scratched and fragmentized, the striker means being a material
which is harder than the container material; fragmentizing the
container into particles having no sharp edges to prevent wound
injuries; and disseminating the chemical agent at the riotous
target area.
Description
DEDICATORY CLAUSE
The invention described herein may be manufactured, used, and
licensed by or for The Government for governmental purposes without
the payment to me of any royalty thereon.
My invention relates to an improvement in disseminating riot
control chemical agents in grenades, such as disclosed in U.S. Pat.
No. 3,434,421; the improvement being in the use of a frangible
material in manufacturing the grenade case.
The problem which existed with the prior art grenades, such as the
aforementioned U.S. Patent, was that the grenade could be picked up
by one against whom the grenade was being used prior to
dissemination of the grenade payload and thrown back to have the
payload disseminated against the user. This was a particular
problem with the prior art grenades when utilized for riot control
purposes. My invention was conceived and reduced to practice to
solve the above described prior art problem and to satisfy the long
felt need for a grenade which could not be thrown back at the
user.
A principal object of my invention is to provide a grenade which
has a frangible case and which cannot be thrown back at the
user.
Another object of my invention is to provide a grenade case which
fragmentizes into pieces which will not cause injuries.
Other objects will be obvious from or will appear in the
specification hereinafter set forth.
FIG. 1 is a view showing my grenade with the safety pin in position
to prevent the striker means from striking the grenade case.
FIG. 2 is a view of the grenade shown in FIG. 1 with the safety pin
removed .
My invention and FIGS. 1 and 2 will now be described in detail as
follows.
As shown in FIG. 1, my grenade consists of a frangible and sealed
container 1 to contain the payload to be disseminated, such as
lachrymatory material; a plunger means assembly shown at 2 having a
head means 3 fixedly connected to shaft 4 at one end and diamond
tip 5, as shown in FIG. 2, fixedly connected to the opposite end of
shaft 4 and adjacent to container 1; plunger mounting means 6
fixedly connected to container 1 in any conventional manner, such
as cementing; fins 7 fixedly connected to container 1 at the end
opposite to the plunger mounting means, such as by cementing, to
give aerodynamic stability to the grenade while in flight to the
target area; and safety pin 8 to retain the plunger means assembly
2 in the position shown in FIG. 1 to prevent diamond tip 5 from
striking container 1 prior to delivery of the munition to a target
area. To deliver the payload, which can be selected within the
skill of the art for any application of my invention, within
container 1 to a target area, pin 8 is withdrawn from hole 9 in
shaft 4; the grenade is thrown to the target area; diamond tip 5 is
forced against container 1 when head 3 strikes the ground at the
target area; a light scratch is placed on the frangible container 1
when diamond tip 5 strikes the container 1 which causes the
container 1 to fragmentize into particles which have no sharp
edges, such as the safety glass in automobile windshields when
broken; and the payload within container 1 is disseminated at the
target area site. Container 1 is manufactured of any glass which
has been chemically treated in hot alkali metal bath to insure
proper fragmentation and has properties such as 1.65 .times.
10.sup.3 psi at 25.degree. C strength to weight ratio modulus of
rupture to specific gravity, 10.3 .times. 10.sup.6 psi at
25.degree. C Young's Modulus of Elasticity, 4.3 .times. 10.sup.6
psi at 25.degree. C shear modulus, 6.0 .times. 10.sup.6 psi bulk
modulus, 40,000 psi modulus of rupture standard sandblast abrasion,
590 kg/mm.sup.2 (100 gm load) Knoop hardness, 2.46 gms/cc density,
880.degree. C softening point, and 583.degree. C strain point.
While the utility of my invention is described as a grenade, my
improved case can be used with other munitions, such as bullets or
other missiles, used in special applications to avoid permanent
injury. Also, while tip 5 is described as a diamond tip, any
material can be used for tip 5 which is harder than and will
scratch and fragmentize container 1.
It is obvious that other modifications can be made of my invention,
and I desire to be limited only by the scope of the appended
claims.
* * * * *