NO125702B

NO125702B -

Info

Publication number: NO125702B
Application number: NO1847/70A
Authority: NO
Inventors: C Arnell
Original assignee: Foersvarets Fabriksverk
Priority date: 1969-05-19
Filing date: 1970-05-14
Publication date: 1972-10-16
Also published as: SE331438B; AT299751B; IE34166L; JPS5022840B1; US3630152A; BE749260A; DE2024380A1; GB1299407A; CH516781A; NL7006126A; IE34166B1; FR2047338A5

Description

Sikkerhetstennrør med tids-og anslagsfunksjon. Safety lighter with time and target function.

Med hensyn til sikkerhetstennror med tids- og anslagsfunksjon onsker man selvsagt at konstruksjonen skal være så enkel som mulig uten at sikkerheten settes på spill. Når det f.eks. gjelder håndgranater med spreng- eller roksats, er det spesielt viktig at rOret også skal kunne stilles inn for den onskede funksjon på en lett-fattelig måte. With regard to safety rudder with time and stop function, one naturally wants the construction to be as simple as possible without jeopardizing safety. When it e.g. in the case of hand grenades with a detonating or rocking device, it is particularly important that the rudder must also be able to be set for the desired function in an easy-to-understand way.

Ved tennrOr for eksempelvis luftvernsgranater finnes der i regelen en anslagskrets og en tidskrets som automatisk trer i funksjon om granaten bommer på målet (selvsprengning). Slike tennrdr er kjent blant annet fra U.S. patentskrift 3.078.802 og 3.371.608. Slagstiftdelen har her en koniik uttagning med en kule som ved anslag overfSrer stetet til slagstiften uavhengig av anslagsretningen. I det sistnevnte patentskrift er der dessuten vist en bevegelig sleide med en tidssats som slynges mot en fast tennstift når projektilet bringes til å rotere ved avskytningen. In the case of fuzes for, for example, anti-aircraft grenades, there is usually an impact circuit and a timing circuit that automatically comes into operation if the grenade misses the target (self-detonation). Such teeth are known, among other things, from the U.S. patents 3,078,802 and 3,371,608. The firing pin part here has a conical recess with a ball which, on impact, transfers the force to the firing pin regardless of the direction of impact. In the latter patent document, there is also shown a movable slide with a timer which is flung against a fixed firing pin when the projectile is brought to rotate during firing.

Oppfinnelsen angår et tennror som er av den sistnevnte type, og hvor sleiden har en særskilt sikkerhetslås med en kule samt hindrer tidskretsen i å utloses for den har nådd å bevege seg ut til en stilling hvor slagstiften i anslagskretsen kan nå tennhette og sprengkapsel. Tennroret passer godt for hånd- og rokgranater, særlig slike som kan forsynes med en drivende del utstyrt med finner og avskytes i en liten granatkaster. The invention relates to a detonator which is of the latter type, and where the slide has a special safety lock with a ball and prevents the timing circuit from being triggered because it has reached a position where the firing pin in the firing circuit can reach the detonator cap and detonating cap. The fuze is well suited for hand and rocket grenades, especially those that can be supplied with a propellant part equipped with fins and fired in a small grenade launcher.

Oppfinnelsens kjennetegn fremgår av patentkravene. The characteristics of the invention appear from the patent claims.

Tegningen anskueliggjør en utforelsesform. Fig. 1 viser lengdesnitt i sleideaksens retning og fig. 2 lengdesnitt loddrett på denne. The drawing illustrates an embodiment. Fig. 1 shows a longitudinal section in the direction of the slide axis and fig. 2 longitudinal sections perpendicular to this.

En tennrorkapsel 1 har et siderettet, storre hull An igniter capsule 1 has a laterally oriented, larger hole

hvori der er innpasset en sleide 7 avtettet med dobbelte O-ringer. Sleiden er hensiktsmessig fjærbelastet og har nær sin ene ende et gjennomgående hull med en tennhette 14a og en sprengkapsel 14b, som begge, når sleiden 7 er trykket nesten til bunns i hullet, er forskjovet i forhold til en detonator som sitter midt i et lokk 11, som er forsynt med O-ringtetning og dekker et gjennomgående hull i tennrorkapselens 6vre vegg. Ovenpå lokket 11 er der plasert en trotylladning 10. Videre er der i lokket også innsatt en fast anslagsstift 12 og en liten permanentmagnet 9 som fastholder en liten kule 9a, lagret fritt bevegelig i et annet gjennomgående hull i tennrorkapselens ovre vegg. Denne kule 9a strekker seg ned i den 6vre, utvidede del 8a av en uttagning i sleiden 7« Delen 8a går via en terskel over i en dypere, nedre del 8b med kulens diameter. TennrSrkapselen 1 har videre et akseparallelt hull som opptar et stempel 13 som er fjærbelastet fra undersiden og fylt med tidssats, og som har en flens 13a som har anlegg mot sleiden helt til denne kommer i fullt uttrukken armert stilling. Nedentil har sleiden en uttagning 6b til å oppfange ahslagsstiften innen sleiden har rukket å bevege seg ut til denne stilling. Videre har sleiden i sitt utstikkende endeparti et hull for en stoppesplint 7a som hindrer sleiden i å trykkes inn utilsiktet. Sluttelig kan sleiden 7 inn til styrehullet for fjæren ha en liten lekkasjekanal for luft 17 som regulerer tiden for sleidens utadgående bevegelse. in which a slide 7 sealed with double O-rings is fitted. The slide is suitably spring-loaded and near one end has a through hole with a firing cap 14a and a detonating cap 14b, both of which, when the slide 7 is pressed almost to the bottom of the hole, are displaced in relation to a detonator sitting in the middle of a cap 11 , which is equipped with an O-ring seal and covers a through hole in the 6th wall of the igniter capsule. A TNT charge 10 is placed on top of the lid 11. Furthermore, a fixed stop pin 12 and a small permanent magnet 9 which holds a small ball 9a, stored freely movable in another through hole in the upper wall of the igniter capsule, are also inserted in the lid. This ball 9a extends down into the outer, extended part 8a of a recess in the slide 7. The part 8a passes via a threshold into a deeper, lower part 8b with the diameter of the ball. The igniter capsule 1 also has an axis-parallel hole which accommodates a piston 13 which is spring-loaded from the underside and filled with a timing charge, and which has a flange 13a which bears against the slide until it reaches the fully extended armed position. Underneath, the slide has a recess 6b to catch the firing pin before the slide has had time to move out to this position. Furthermore, the slide has in its protruding end part a hole for a stop pin 7a which prevents the slide from being pressed in unintentionally. Finally, the slide 7 to the control hole for the spring can have a small leakage channel for air 17 which regulates the time for the slide's outward movement.

Like under sleiden har tennr8rkapselen et siderettet hull for en låsepinne 15 som er tettet med en 0-ring og har et vinkel-formet håndtak. Låsepinnen har i sin indre ende en renneformet uttagning som en bevegelig anslagsstLft 6 strekker seg inn i gjennom et sentralt hull i tennrorkapselens nedre del. Anslagstiften 6 hviler direkte på en st6rre kule 5 i en konisk, traktlignende uttagning i en gjenget til-slutningspropp 2 som har en permanentmagnet 3 i bunnen og er skrudd inn i den nedre del av tennrorkapselen 1. Gjengeproppen har også gjenger for påskruning av et beskyttende lokk eller en rorstump 4 forsynt med drivsats og styrefinner nedentil. I denne form kan anordningen anvendes som en vingegranat for en liten granatkaster med et par hundre meters rekkevidde. Just below the slide, the igniter capsule has a lateral hole for a locking pin 15 which is sealed with an O-ring and has an angle-shaped handle. At its inner end, the locking pin has a channel-shaped recess into which a movable stop 6 extends through a central hole in the lower part of the igniter capsule. The stop pin 6 rests directly on a larger ball 5 in a conical, funnel-like recess in a threaded connection plug 2 which has a permanent magnet 3 at the bottom and is screwed into the lower part of the igniter capsule 1. The threaded plug also has threads for screwing on a protective lid or a rudder stump 4 fitted with drive kit and steering fins underneath. In this form, the device can be used as a wing grenade for a small grenade launcher with a range of a couple of hundred metres.

Tennroret virker på folgende måte: Dreier det seg om en håndgranat hvor man skal gjore bruk av både tids- og anslagsfunksjon, fjerner man både transportsikringen (splinten 7a) og funksjonssikringen (låsepinnen 15)• Kasteren trykker nu sleiden 7 inn for hånden, og når han siden kaster granaten, frigjor kulen 9a seg ved denne bevegelse fra magneten 9 og faller ned i sleidens uttagning 8b, så sleiden blir klar til å bevege seg utover. Bevegelsen tar såpass lang tid som 1-1,5 s ved at det oppstår en viss sugevirkning bak sleiden når luften bare lekker inn gjennom den trange kanal 17. I armert stilling stoppes sleiden av en liten stift 16 idet den slår mot denne med enden av et lite spor l6a i sin underside. Flensen 13a på stempelet 13 kan nå passere gjennom en uttagning i sleiden, så stempelet 13 med tidssatsen slår imot anslagsstiften 12 i lokket 11. Gassene fra tidssatsen lekker lett ut gjennom sporet l6a, da den ytre O-ring nu er utenfor tennrorkapselens vegg, og etter ca. 3 s foregår overtenning til tennhetten 14a så granaten eksploderer. Skulle den ha slått an tidligere, slår kulen 5 anslagsstiften 6 inn i tennhetten 14a, men skulle man tilfeldigvis miste granaten f6r kastet, når sleiden ikke helt ut for stotet, så anslagsstiften 6 bare farer inn i uttagningen 6b og granaten er ufarlig. The fuze works in the following way: If it is a hand grenade where both the time and impact functions are to be used, you remove both the transport safety (pin 7a) and the function safety (locking pin 15) • The thrower now presses the slide 7 in by hand, and when he then throws the grenade, the ball 9a frees itself by this movement from the magnet 9 and falls into the slot 8b of the slide, so that the slide is ready to move outwards. The movement takes as long as 1-1.5 s because a certain suction effect occurs behind the slide when the air only leaks in through the narrow channel 17. In the armed position, the slide is stopped by a small pin 16 as it hits this with the end of a small groove l6a in its underside. The flange 13a on the piston 13 can now pass through a recess in the slide, so the piston 13 with the timer hits the stop pin 12 in the lid 11. The gases from the timer easily leak out through the slot l6a, as the outer O-ring is now outside the wall of the igniter capsule, and after approx. 3 s over-ignition takes place to the ignition cap 14a so the grenade explodes. Should it have struck earlier, the bullet 5 strikes the striker pin 6 into the firing cap 14a, but should one accidentally lose the grenade before it is thrown, when the slide does not fully extend before impact, the striker pin 6 only goes into the recess 6b and the grenade is harmless.

Vil man ikke ha anslagsfunksj6n, behover man bare å la funksjonssikringen, altså låsepinnen 15 bli sittende under kast. If you do not want the stop function, you only need to leave the safety device, i.e. the locking pin 15, in place during throw.

Skal granaten anvendes som ammunisjon for en lett granatkaster, vil man som oftest ikke ha tidsfunksjonen med, og stempelet 13 kan da låses med en konvensjonell sperring, som ikke er vist. Transport- og funksjonssikring (7a og 15) tas bort som for, og granaten f6res ned i lopet etter at drivdelen er skrudd på. Gasstrykket ved utskytningen trykker sleiden 7 inn (kraften blir selvsagt meget storre enn om man trykker sleiden inn for hånd) og kulen 9a blir slynget ned i hullet 8b. Sleiden begynner å bevege seg utover forst etter at granaten har forlatt lopet, og man får siden en usedvanlig langvarig banesikring. If the grenade is to be used as ammunition for a light grenade launcher, the time function is usually not included, and the piston 13 can then be locked with a conventional lock, which is not shown. Transport and functional safety (7a and 15) are removed as before, and the grenade is moved down the barrel after the drive part has been screwed on. The gas pressure at launch pushes the slide 7 in (the force is of course much greater than if you push the slide in by hand) and the bullet 9a is thrown into the hole 8b. The slide only starts to move outwards after the grenade has left the barrel, and you then get an exceptionally long-lasting trajectory protection.

Claims

1. Safety ignition switch with time and stop function, e.g. for a hand or hand grenade, where a firing pin (6) is affected by a firing pin (5) located in a connecting piece (2) with a conical funnel surface and a permanent magnet (3), and where the firing cap (14a) and blasting cap ( 14b) lies in a laterally offset, appropriately spring-loaded slide (7) which is fitted into a bore in the fuze cap (1), which also has a recess for a spring-loaded piston (13) which is filled with timing and movable against a fixed stop pin (12 ), characterized in that the outward movement of the slide (7) in the safety prevents the positioning of a body (9a) which rests in a hole in the upper part of the igniter capsule and is held against a magnet - in a lid (11) which covers the hole, while the body's (9a) lower part engages in an upper, somewhat extended part (8a) of a recess in the slide, and that the body (9a) will only be released from the magnet when the slide is retracted and the igniter subjected to a minor acceleration force (throwing movement) (9) and fall into a lower part (8b) of the outlet i the slide (7), and that the timing piston (13) has a flange (13a) which rests against the slide (7)' and prevents the piston (13) from moving towards the fixed stop pin (12) until the flange (13a) can pass a recess in the slide (7) when this has reached the fully armed position with the firing cap (14a) directly in front of the stop pin (6).

2. Safety igniter as specified in claim 1, characterized in that the slide (7) is sealed with e.g. O-rings and provided with at least one leak passage (17) which is connected to the back of the slide (7) to equalize the negative pressure that occurs behind the slide when it is fed towards the armed position, whereby in addition to the spring pressure the diameter of the passage (17) determines the time (the delay ) for the reinforcement movement.

3. Safety fuze as stated in claim 1 or 2, characterized in that the fuze capsule (1) at the height of the stop pin (6) has a hole for a laterally displaceable locking pin (15) with a recess for engagement (safety position) with the stop pin ( 6), which r-has the least possible mass and is kept directly pressed against the impact-sensitive body (5) as long as its functional safety locking pin (15) is in place, so the impact pin when the pin (15) is removed becomes particularly impact-sensitive because it constitutes the only moving part apart from the impact-sensitive body itself (5).