US1614536A

US1614536A - Fuse for projectiles

Info

Publication number: US1614536A
Application number: US34246A
Authority: US
Inventors: Pantoflicek Bohdan
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-06-09
Filing date: 1925-06-01
Publication date: 1927-01-18
Anticipated expiration: 1944-01-18
Also published as: FR597546A; GB235236A

Description

Jan. 18 1927, 1,614,536

B.- PANTOFLI CEEK FUSE FOR PROJECTILES Filed June 1. 1925 Patented Jan. 18, 1927.

UNITED res BOHIDAN rAN'rorLr'cEK, or LOCHOTIN, PILSEN, ozEcHosLovAxIA.

FUSE FOR PROJEGTILES.

Application filed June 1, 1925 Serial No. 34,246, and in Czechoslovakia June 9, 1924.

plosives, powder or the like, with which they are filled. Through these gases, which develop if moisture gets into the charge of the projectile or from the charge itself, or

through the moisture alone the component parts of the fuse are exposed to chemical action and, when stored for some time, are damaged to such an extent that their functioning is made very uncertain or quite impossible. Even the presence of a single detonator or of the smallest quantity of explosive or powder in the fuse is sufficient to cause damage to the component parts of the fuse, which, as is known, are in the main -fine mechanical parts. Hence it is impossible to preserve the fuses for any considerable time. The present invention relates ,to a fuse, in which all the above-mentioned drawbacks of fuses as hitherto made areovercome, The invention'consists substantially in this that the fuse is so constructed as to contain no explosives or detonators whatever, but only mechanical parts. A fuse of such construction can be stored and transported as a complete unit entirely separate from the projectile proper and be completely protected from moisture. Forensuring the exclusion of moisture air-tight'containers may for instance be used. In projectiles provided with fuses constructed in this manner all the explosives and detonators are housed in the projectile proper or in a separate casing.

For protecting the explosive of the projectile, the detonator and the like from the ac tion of moisture or from mechanical influences the projectile is closed with a separate air-tight cover or closing plate, which is removed before the fuse proper is screwed into the projectile. On the fuse proper being screwed in, the needle, which is acted on by a spring, centrifugal force or the like, comes in front of the detonator of the projectile itself, in order that the latter may be caused to explode at the required moment.

For providing absolute safety, when mounting the fuse or for the detonator, a separate closure is provided between the needle of the fuse and the detonator of the projectile, which protects the detonator from the needle or from external action, when the fuse is not screwed on. This separate closure is opened or displaced only at the moment of firing by centrifugal or some other suit- .to the needle 16.

able force, for giving the needle free access to the detonator. The closure may also be opened or displaced by the shock at the moment of firing or by a separate partof the actual mechanical fuse travelling through a certain path in the fuse. The closure may either be located in the actual fuse part of the mechanical fuse or preferably directly in the projectile or casing, in which the dotonator is located, in which latter two cases,

as already stated, the detonator is also protected from external mechanical influences. In the fuse according to the presentinvention the needle is visible, easily accessible and therefore capable of being inspected.

In the accompanying drawing: Figure 1 shows a projectile, which is put together ready for use, Figure 2 the unscrewed mewhich contains any suitable known mechanism for releasing the needle after a predetermined period of time or at the moment of impact. This fuse 1 :is screwed :by means of the thread '2 into the intermediate part 3. Into this intermediate part3 aholder '5 .is screwed, in which the detonator 4 is held in its .correct position ,by a further plug 7. The holder 5 also carries the booster 8, which extends into the bursting charge 9 of the projectile 10. The intermediate part 3 is connected by means of a thread 11 with the actual body 10 of the projectile. Between the thread 2 and'the, holder 5 a further filler member 12 is provided, which has a slot 13 on one of its sides, in which a small plate 14 can move radially. The plate 14, when in its position of rest, covers the passage 15, through which the needle 16 of the mechanical fuse causes the detonator 4 and the projectile to explode. On the projectile being fired, the small plate 14 is displaced radially by centrifugal force, so that the passage 17 comes into alinement with the passage 15, thus giving a free path Instead of the plate 14 being displaced by centrifugal force, it can be displaced by a spring or-some other force, which acts at the moment of firing. The constructional form shown with the movable plate 14 is only one of the many possible ways'of protecting the detonator from undesirable infiuences and will therefore be referred to below only as the closure.

In order that it may not be necessary to use a separate screwed-in intermediate part 3 containing the closure for the detonator and the detonatorand exploder, the body 10 of the projectile may be extended so as to receive the whole mechanism, which is otherwise contained in the intermediate part.

In order that the projectile may be stored without moistureor other detrimental gases damaging the fuse mechanism, the mechanical fuse l'is unscrewed (Fig. 2) and is enclosed in an air-tight container.

The projectile itself is closed at the end which is open, when the fuse is screwed ofi, in an air-tight manner by means of a separate cover. The cover may also be a screw,

which is screwed into the exposed opening. 7

In Fig; 3 an air-tight cover 18 is shown.

What I claim is r l. The combination of a projectile with a mechanical fuse, the fuse proper containing only the mechanically acting parts of the fuse, a' part intermediate of the projectile and the fuse, said intermediate part being screwed into the projectile and being formed with aninternally screw threaded cavity into which the fuse is screwed, a separate releasable closure in the intermediate part between the needle of the mechanical fuse and the detonator, a holder member capable of being screwed into the internally screw threaded cavity in the intermediate part and of containing the detonator, and a plug (7) for holding the detonator in the holder (5) fixedly in alignment with 'theneedle,as set forth. 7

2. The'combination of a projectile with a mechanical fuse, the fuse proper containing only the mechanically acting partsof the holding the deto-nator in the holder (5) fixed-l ly in alignment with the needle, and a filler member (12) capable of being screwed into the internally screw threaded cavity in theintermediate part above the detonator and of containing the separate closure, as set forth.

I 3. The combination of a projectile with a mechanical fuse, the fuse proper containing only the mechanically acting parts of the fuse, a part intermediate of the projectile and the fuse, into which the fuse is screwed and which part is screwed into the projectile, a separate releasable closure in the intermediate pa'rt between the needle of the mechanical fuse and the detonator, a holder (5) capable of being screwed into the intermediate part and of containing the detonator, a plug (7) for holding the detonator in the holder (5), and a filler member (12) capable of being screwed into the intermediatepartr above the detonator and containing a recess on one slde 1n which the closure can move radially, as set forth.

In testimony whereof I have signed my name to this specification.

BOHDAN (PANTOFLTCEKQ