US20030036335A1

US20030036335A1 - Toy hand grenade

Info

Publication number: US20030036335A1
Application number: US09/931,019
Authority: US
Inventors: King Juy
Original assignee: UNION WELL Ltd
Current assignee: UNION WELL Ltd
Priority date: 2001-08-17
Filing date: 2001-08-17
Publication date: 2003-02-20

Abstract

A toy hand grenade comprises a cardboard tube, pyrotechnic compositions including a smoke agent, an emitting charge and a color powder, a pulling thread and friction ignition means, an ignition mechanism including friction composition, ignition composition, a pulling thread, a safety fuse and a quick fuse. The quick fuse is firstly ignited by the friction between the cotton pulling thread and the friction composition. The toy hand grenade is thrown at an open space beyond 10 meters after ignition to release a great quantity of smoke and generate a great quantity of gases. The gases may destroy the structural shape of the cardboard tube and set off massive color powder. The invention is mechanically simple and inexpensive to manufacture as compared with the conventional toy hand grenade. Of course, it does not lose its effectiveness due to rusting.

Description

BACKGROUND OF THE INVENTION

The invention relates generally to a toy, and more particularly, to a new and improved toy hand grenade in which pyrotechnic compositions can be ignited to produce a great quantity of gas and blowing out or set off massive color powder.

The toy hand grenade is a well known device, which has been utilized in prior art for entertainment and amusement and used in various type of war game. A typical-conventional toy hand grenade, as shown in FIG. 1, consists of a hollow

cylindrical housing

10, a friction igniter 20, a pulling ring 30, safety fuse 40 and smoke composition 50. The friction igniter 20 including a pulling wire 60 and a friction cup 70 coated with friction composition is mounted and positioned in one side of central bore of the housing 10, and the remaining portion of the housing 10 is filled with smoke composition 50. The pulling wire 60 is passed through a central hole of the friction cup 70 and the two ends of the pulling wire 60 are connected to the safety fuse 40 inserted into smoke composition 50 and the pulling ring 30 respectively. In use, friction composition coated thereon is ignited by friction between the pulling wire 60 and the friction cup 70 to generate heat, then the safety fuse 40 is burned by the heat conduction or transfer of the pulling wire 60. The disadvantages of the conventional toy hand grenade are that because the metallic pulling wire 60 is used and the metallic pulling wire is ignited by the friction between the metallic pulling wire and the metallic cup, and the heat conduction is used to ignite the safety fuse, the force used to pull the pulling ring and the quality of friction composition coated on the metallic pulling wire may influence the degree of the metallic pulling wire to be heated, thus on the reliability of the ignition of the smoke composition. Furthermore the prior art toy hand grenade generate only smoke, the effect is rather limited. In addition, the metallic pulling wire and the metallic cup must be made of metal, such as copper etc., therefore, the manufacturing cost thereof is comparatively higher. Besides, the metallic pulling wire and the metallic cup are easy to gather rust so that they will take no effect beyond a prescribed period.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a toy hand grenade which can produce smoke gases and set off massive color powder to overcome foregoing and other shortcomings of the prior art.

In accordance with the present invention, the toy hand grenade, comprising

A cardboard tube sealed by first and second clay in both ends to form a chamber,

Pyrotechnic composition including a smoke agent, an emitting charge and a color powder being placed in the chamber of the cardboard tube;

A means for friction and ignition;

The means for friction and ignition includes a mean for friction on which a friction composition is covered, and a means for ignition on which an ignition composition is covered, which is kept the means for friction at some distance and is above the means for friction; a quick fuse, one end of which is in contact with the friction composition and another one is connected to a pulling thread; and a safety fuse, one end of which is in contact with pyrotechnic composition and another one is in contact with the ignition composition, thereby when a pulling ring connected to the pulling thread is pulled downwardly, the means for friction is frictionally moved against one another so that the friction composition is ignited, by which the quick fuse and the safety fuse are also ignited in an orderly way, finally, pyrotechnic composition is burned upon ignition to release a great quantity of smoke.

As one embodiment of the present invention, a friction ignition means disposed in the upper portion of the lower cardboard tube, which comprises a small paper tube served as a stopper, an ignition mechanism including friction composition, ignition composition, a pulling thread, a safety fuse and a quick fuse, in which a lower end of the small paper tube is retained to the inner wall of the lower cardboard tube, the friction composition and the ignition composition are placed in the small paper tube, but the ignition composition is separated a certain distance from the friction composition and positioned above the friction composition, one end of the quick fuse is connected to the friction composition, the other end is connected to one end of the pulling thread, one end of the safety fuse is inserted into the bore maintained-above, the other end is connected to the ignition composition of the friction ignition means, the pulling ring is connected to the other end of the pulling thread and positioned outside the lower cardboard tube;

The smoke agent includes a white smoke agent or a color smoke agent. The white smoke agent is comprised, by weight, of 27 percent of potassium chlorate, 46 percent of sulfur and 27 percent of sodium bicarbonate, the color smoke agent is comprised, by weight, of 27 percent of potassium chlorate, 6 percent of sulfur, 27 percent of sodium bicarbonate and 40 percent of dyestuff. 3 grams of smoke agent are used;

The friction composition consists of 30 parts by weight of potassium perchlorate, 30 parts by weight of magnalium, 20 parts by weight of sulphur and 20 parts by weight of copper oxide.

Preferably, the chamber of the upper cardboard tube is spaced by third clay (layer) and divided into an upper chamber and a lower chamber. The upper chamber is filled with the emitting charge and the color powder and the lower chamber is filled with the smoke agent.

More Preferably, the upper cardboard tube has outside diameter of 38 mm, inside diameter of 30.5 mm and length of 67 mm, and the lower cardboard tube has outside diameter of 30 mm, inside diameter of 26 mm and length of 127 mm.

It is preferred that toy hand grenade further includes a paper which is used to wrap the lower cardboard tube and the pulling ring.

In a preferred embodiment, the friction composition is comprised, by weight, of 20 percent of phosphorus and 80 percent of potassium chlorate.;

In another preferred embodiment, the friction composition is comprised, by weight, of 20 percent of phosphorus, 70 percent of potassium chlorate and 10 percent of calcium carbonate;

In other preferred embodiment, the friction composition is comprised, by weight, of 75 percent of lead oxide and 25 percent of silicon.

The ignition composition is composed, by weight, of 75 percent of potassium nitrate, 10 percent of sulfur and 15 percent of carbon.

The toy hand grenade of the present invention has the following features:

(1) The reliable ignition. The quick fuse is firstly ignited by the friction between the cotton pulling thread and the friction composition, and after the quick fuse has been ignited, the safety fuse is ignited by the ignition composition which has been ignited by the quick fuse, thus the ignition is reliable.

(2) Moreover, the toy hand grenade of the present invention has good firework setting-off effect, practicality and more amusement and entertainment are available when playing with it, and the range of viewing and admiring is more extensive, because in the upper cardboard tube, there are smoke agent, emitting composition and colored powders. After the safety fuse is ignited, the above-mentioned compositions can rapidly be ignited successively within several seconds to generate a large amount of smoke, followed by the generation of a large volume of gas which breaks through the upper cardboard tube and carries energetically the colored powders into space.

(3) Furthermore, the pulling wire is made of cotton fibers instead of metallic wire, and no metallic cup is used, the manufacturing cost can be greatly reduced. Broadly speaking, the present invention is mechanically simple and inexpensive to manufacture as compared with the conventional toy hand grenade. Of course, it does not lose its effectiveness due to rusting.

DESCRIPTION OF DRAWINGS

The accompanying drawings illustrate the best mode presently contemplated of carrying out the invention. In the drawings: [0023]
FIG. 1 is a cross sectional view of a conventional toy hand grenade; [0024]
FIG. 2 is a longitudinal cross sectional view of a toy hand grenade of the present invention; and [0025]
FIG. 3 is a cross sectional view of another toy hand grenade of the present invention.[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to FIG. 2, a toy hand grenade comprises: an [0027] upper cardboard tube 1 sealed by a first and second cardboard layers or clay 11, 12 to form a chamber (cavity) between both. The chamber of the upper cardboard tube is spaced by third clay 13 and divided into an upper chamber 14 and a lower chamber 15. The upper cardboard tube 1 has outer diameter of 38 mm, inner diameter of 30.5 mm and length of 67 mm.
a [0028] lower cardboard tube 2 used as handle is fixedly mounted to the bottom of the upper cardboard tube 1. The lower cardboard tube 2 has outer diameter of 30 mm, inner diameter of 26 mm and length of 127 mm. The lower cardboard tube 2 can be inserted partly into the opening of the lower end of the upper cardboard tube 1 and firmly fixed in place by a binder.
Pyrotechnic composition including a [0029] smoke agent 3, an emitting charge 4 and a color powder 5 is placed in the chamber of the upper cardboard tube 1 from below to above. In the preferred embodiment, the smoke agent 3 is pressed or placed into the lower chamber 15 of the upper cardboard tube 1 and positioned between the clay 12 and 13, the emitting charge and the color powder are pressed or placed into the upper chamber 14 of the upper cardboard tube 1, but the color powder 5 is disposed on the emitting charge 4. The center of each of the smoke agent 3, the clay 12, 13 and the emitting charge 4 is provided with a hole 101 by which one end of the safety fuse 64 is connected to or inserted into it. Generally, the cardboard disk can be also used instead of the clay.
Said [0030] smoke agent 3 includes a white smoke agent or a color smoke agent. The white smoke agent is composed, by weight, of 27 percent of potassium chlorate, 46 percent of sulfur and 27 percent of sodium bicarbonate; the color smoke agent is comprised, by weight, of 27 percent of potassium chlorate, 6 percent of sulfur, 27 percent of sodium bicarbonate and 40 percent of dyestuff. (the total weight of white or other color smoke is about 3 grams).
Said emitting [0031] charge 4 is composed, by weight, of 75 percent of potassium nitrate, 10 percent of sulfur, 15 percent of carbon.
A friction ignition means [0032] 6 is disposed inside the upper portion of the lower cardboard tube 2, which comprises a small paper tube 61 served as a stopper, an ignition mechanism 62 including friction composition (starter 1) 621, ignition composition (starter 2) 622, a pulling thread 63, a safety fuse 64 and a quick fuse 65. A lower end of the small paper tube 61 is closed by the staple, the friction composition 621 and the ignition composition 622 are placed in the small paper tube, but the ignition composition 622 is separated a certain distance from the friction composition 621 and is positioned above the friction composition 621. One end of the quick fuse 65 is in contact with the friction composition 621, the another end is connected to one end of the pulling thread 63. One end of the safety fuse 64 is connected to smoke agent 3, emitting charge 4 and color powder 5 by the hole 101 or inserted into the hole 101, the another end is in contact with the ignition composition 622 of the friction ignition means 6.
A [0033] pulling ring 7 is arranged at the bottom of the lower cardboard tube 2, which is connected to one end of the pulling thread 63 and positioned outside the lower cardboard tube 2.
The friction composition can be selected from one of the following composition groups, [0034]
a) of 30 parts of potassium perchlorate, 30 parts of magnalium, 20 parts of sulphur and 20 parts of copper oxide, by weight (below is the same); [0035]
b) of 20 percent of phosphorus and 80 percent of potassium chlorate; [0036]
c) of 20 percent of phosphorus, 70 percent of potassium chlorate and 10 percent of calcium carbonate; [0037]
d) of 75 lead oxide and 25 percent of silicon. [0038]
The [0039] ignition composition 622 is composed, by weight, of 75 percent of potassium nitrate, 10 percent of sulfur and 15 percent of carbon.
In addition, the toy hand grenade further includes a [0040] paper 8 which is used to wrap the lower cardboard tube 2 and the pulling ring 7 for the case of transportation and storage convenience.
The total weight of chemical compositions specified is 4.2 grams. The manufacturer has tested these materials for thermal stability, and the test was made according to paragraph 4.3.2 of the APA Standard. [0041]
The thermal stability test of the present grenade was performed on Dec. 22, 2000 by Yeng Ta Toy Fireworks Company. The test showed that the material did not ignite, explode, or undergo significant decomposition during heating at 75 degree C. (167 degree F.) for 24 hours. This is to certify that the present grenade for which approval is requested conforms to APA standard 87-1 and the description and technical information contained in this application are complete and accurate. [0042]
In use, the pulling [0043] ring 7 is pulled downwardly from the bottom of the lower cardboard tube 2, the pulling thread 63 is moved and frictionally engaged or is in contact with friction composition 621 one another, thereby the friction composition (charge) 621 is ignited. Then the quick fuse 65 in the friction ignition means 6 is also ignited in about 2 to 3 seconds. In that time, the ignited friction composition 621 and quick fuse 65 produce a few white smoke (fog) and provide a detonation sound of about 30 db for a short period time which lasts about six to ten seconds after ignition. At this time, the toy hand grenade must be thrown immediately away to open space beyond 10 meters after the above white smoke is seen. Further, the ignition composition (charge) 622 coated on the safety fuse 64 is ignited by burning of the quick fuse 65. The safety fuse 64, in turn, ignites the smoke composition or smoke agent 3 to release a great quantity of smoke, and the emitting charge 4 acts to generate a great quantity of gases. The gases may destroy the structural shape of the upper cardboard tube 1 and blow out or set off massive color powder 5, giving out a detonation sound of about 60 db.
FIG. 3 shows another embodiment of the present invention and illustrates an example of differently shaped outer layer. Of course, the grenade body may be formed in any practical shape such as spherical, cylindrical, stepped cylindrical, or ovoid, i.e., egg-shaped. Preferably, the grenade body is shaped and balanced similar to the actual weapon. It is intended to simulate especially for military training purposes. [0044]
The [0045] grenade body 21 is preferably formed of a high strength and durability plastic material. It may be formed in halves (not shown), for more convenient manufacture and access to the interior, and assembled by suitable fasteners (not shown). The grenade body 21 has a cavity wherein a cardboard tube 11 is inserted. The cardboard tube 11 sealed by clay 23 and 24 to form a chamber between both. Pyrotechnic composition 26 is placed in the chamber. A fuse 25 is centrally embedded in pyrotechnic composition 26 from the above end and then the fuse extends to a release lever 27 attached to the grenade body 21 by means of the general methods, for example, adhering. A friction ignition means 28 is disposed inside the release lever 27.
When the toy hand grenade is to be used, it is held with the hand and the pulling [0046] thread 29 is pulled downwardly so that friction composition 30 is frictionally engaged, thereby it is ignited and simultaneously a detonation about 30 db is given out. Then, the fuse 25 is also ignited.
In that time, a few white smoke is produced and the toy hand grenade has to be immediately thrown at an open space beyond 10 meters. After about 3 to 9 seconds. [0047] Pyrotechnic composition 26 and a cover paper 31 are also ignited by burning of the fuse 25 and a great quantity of smoke is released.
There are many changes and modifications which can be made to applicant's single push button type storage case which would be obvious to one of ordinary skill in the art, and which are included in the scope of applicant's invention. It is intended that applicant's invention be limited only by the scope of the claims appended hereto. [0048]

Claims

We claim:

1, A toy hand grenade, comprising

a cardboard tube sealed by first and second clay in both ends to form a chamber;

pyrotechnic compositions including a smoke agent, an emitting charge and a color powder being placed in the chamber of the cardboard tube;

a means for friction and ignition;

characterized in that said means for friction and ignition includes a mean for friction on which a friction composition is covered, and a means for ignition on which an ignition composition is covered, which is kept the means for friction at some distance and is above the means for friction; a quick fuse, one end of which is in contact with the friction composition and another one is connected to a pulling thread; and a safety fuse, one end of which is in contact with pyrotechnic composition and another one is in contact with the ignition composition, thereby when a pulling ring connected to the pulling thread is pulled downwardly, the means for friction is frictionally moved against one another so that the friction composition is ignited, by which the quick fuse and the safety fuse are also ignited in an orderly way, finally, pyrotechnic composition is burned upon ignition to release a great quantity of smoke.

2, A toy hand grenade according to claim 1, wherein said friction composition consists of 30 parts by weight of potassium perchlorate, 30 parts by weight of magnalium, 20 parts by weight of sulphur and 20 parts by weight of copper oxide.

3. A toy hand grenade according to claim 1, wherein said friction composition consists of 20 weight percent of phosphorus and 80 weight percent of potassium chlorate.

4, A toy hand grenade according to claim 1, wherein said friction composition consists of 75 weight percent of lead oxide and 25 weight percent of silicon.

5, A toy hand grenade according to claim 1, wherein said ignition composition consists of 75 weight percent of potassium nitrate, 10 weight percent of sulphur and 15 weight percent of carbon.