IL28416A - Illuminating projectiles - Google Patents

Description

SPECIFICATION projectiles OP MINISTRY OF BEHALF OF THE STATE O and ABRAHAM Israeli 78 Street do hereby declare the nature of this invention and what manner the same is to be to particularly described and ascertained in and by the following This invention relates to illuminating projectiles and particularly concerned with such projectiles whether in the form of for example mortar shells adapted to launched by mortars or aerial adapted to be dropped from In the hitherto proposed illuminating hereinafter to as an projectile of the kind the projectile consists of front and rear body portions secured together by shearable an assembly located in the front body a main parachute assembly located in the rear body a flexible cable for coupling the assemblies together and an expelling charge located the nose of the front body portion and adapted upon ignition to shear the shearable means and to expel th illuminant assembly from the front body With such an illuminating ile the kind specified it arranged that the expelling oharge is ignited at a time launching or dropping when it is estimated that the projectile is located in the correct the illuminant assembly thus expelled being expected to descent under the parachute released from the rear body It has been that with projectiles of the kind there is an inherent difficulty in withdrawing the parachute assembly from the rear body portio and in avoiding collision between the rear body portion and the illuminant It is an object of the present invention to provide According to present invention there provided a illuminating projectile comprising front and rear body portions and secured by shearable an llluminant assembly located in the front body a parachute assembly located the rear body a ible cable coupling the assemblies charge located in the forward end of the and adapted upon ignition to shear the shearable means and to expe the llluminant from the front body rocket motor located at the of the llluminant assembly and upon to separate the llluminant and parachute assemblies from the rear body said parachute assembly including main releasably coupled to the rea body portion a flexible line and auxiliary parachute coupled to the rear of the llluminant In such a manner tha the retarding force exerted the ant assembly by the auxiliary parachute when ope has a component directed transversely respec to a longitudinal of the said flexible being of a length sufficient to allow the parachute assembly and rear body portion to become sufficiently separated so tha upon the subsequent ing the main parachute fouling thereof by the rear body portion substantially In the expelling charge is ignited at a preset time after launohin of the projectile and as a result the shearable means are sheared and the illuminant coupled to the rear body is expelled the front body latter continuing on its initial tra At time thereto a forward thrust as compared to rear body portion and as a result the illuminant the parachute assembly and the rear body portion apart time parachute e the illuminant assembly diverting from the trajectory rear body portion and illuminant assembl are adequately spaced apart strain is on flexible eable on the flexibl line and as a result the parachute is detached from the main parachute and the main parachute virtue of the provision of the rocket the separation of the illuminant assembly from the rear body portion and consequently the release of the auxiliary parachute is effectively by virtue of the fact that force by the auxiliary parachute on the illuminant assembly d a component versely directed with respect to the longitudinal axis the is displaced away from its origina trajectory and so the danger of collision between the illuminant assembly and the parachute assembl on one hand and the rear body portion of the projectile on the other hand is considerably by virtue of the provision of the flexible line coupling the parachute assembly to the rear body main parachute free to open only the rear body portion has passed it by and thus the danger of between the main paraohute on one hand and the rear body portion on the other hand further One embodiment of an illuminating projectile in the form of a mortar shell and in accordance with the present invention now be described by way of example and with referenc to the accompanying drawings whic 1 a longitudinally cross sectioned elevation of the 2 on an enlarged a detail of 3 illustrates schematically the various stages with the in after launching and endin in the downward descent of the illuminant assembly under opened As seen in 1 o the an illuminating projectile in the form of a mortar shell comprises a front body portion 2 and a rear body portion front body portion 2 is provided with a nose assembly 4 whilst the rea body portion 3 provided with a tail assembly open end 6 the rear body portion 3 fits into the adjacen open end 7 of the front body portion and the two body portions are secured together by means of shearable rivets An illuminant assembly 9 is in the front body portion 2 and consists of an Illuminant mass 10 pressed cylindrical container 12 enclosing an interna inhlbitive envelope An ignition charge 13 is pressed on top of the illuminant mass into the container An disc 14 closes the ope end of the container A centrally stepped rod is secured at one end to the base 12a of the container and extends through illuminant 10 and the charge end of the rod emerging from the container through a hole in disc is secured to a rocket motor 17 which against a disc 16 located on of covering disc The forepart 18 of the motor 17 has a plurality of directed orifices end of the 15 secured to the base 12a of the container 12 is formed as a bearing 20 in which retained the container 12 against the outer rim of the d portion of the rear body portion 3 via a felt disc A mai parachute 24 is located the rea body portion 3 and consists of a main 25 contained in a flexible hag 26 and having parachute cords 27 secured to the flexible cable The flexible container 26 is secured by means of a flexible line to a disc retained the rear body portion A small auxiliary parachute 29 is also located i the rear body portion 3 is secured via cords 30 an anchoring lug 31 secured to the bearing 20 and extending The nose assembly is provided with an expelling charge whilst the tail assembly 3 is provided with a launching charge not mode of operation of the projectile Just described will now be illustrated with reference to 3 of the drawings in which shown the six stages and starting with the stage projectile in flight after launching ending the stage wherein the mass descends under its open main shows the pro ectile proceeding along an initial trajectory At a the expelling Charge in the nose of the projectile is ignited and as a result the assembly 9 coupled to the rear body portion 3 is expelled from front body portion the latter proceeding on its original trajectory 35 whilst a same time the rocket motor 17 and the ignition charge are all this taking place in the stage illustrated rocket motor 17 and the illuminant assembly 9 Integral therewith given a thrust thereby resulting separation of the illuminant assembly 9 from the rear body portion 3 the withdrawal of the main parachute assembly 24 from the rear body portion A the same time the auxiliary parachute 29 begins to all this taking place in With the full opening of the auxiliary parachute 29 assembly 9 is on one hand retarded and on the other hand displaced from trajectory 36 of the rear body portion 3 as shown in stage In the next stage the main parachute 25 is withdrawn from the flexible parachute bag 26 which remains coupled by the flexible 28 to the rear body portion the rear body portion 3 and the flexible ba 26 proceeding along trajectory shown in stage the now ignited illuminant mass coupled the auxiliary and main parachutes and 29 begin their the final stage the illuminant mass 10 burning intensely descends under the open parachute the auxiliary parachute having in meantime been burnt Consideration of the various stages of operation as described above makes clear the considerable advantage afforded by the provision of the small motor the auxiliary 29 and the flexible line 28 o the hand facilitates the withdrawal of the parachute assembly from the rear body portion on the othe avoids collision of the rear body portion 3 with Illuminant assembly or with the parachute insufficientOCRQuality

Claims (1)

CLAIMS An illuminating projectile comprising front and rear body portions and secured together by shearable a assembly in the front body a parachute assembly located in the rear body a flexible cable coupling the assemblies an expelling charge located in the forward the front body portio upon to and the shearable expel the aesembly from the front body a roclcet motor located at the forepart of the illuminan assembly and upon to separate the illuminant and parachute assemblies the rear body said parachute including a main parachute releasably coupled to the rear body portion via a flexible line and an auxiliary parachute coupled to the rear the illuminant assembly in such a manner that the retarding force exerted on illuminant aesembly by the auxiliary parachute open has a component directed transversely with respect to a itudinal axis of the illuminant flexible line being of a length sufficient to allow the parachute assembly and rear bod o become sufficiently so that upon the subsequent opening of the main parachute foulin thereof by the rear body portion is lly A illundnating accordin to Claim wherein main paraohute is located in a flexible container coupled to said rear by flexible An illuminating projectile according to
1. Claim 1 or wherein the auxiliary parachute is coupled the illuminant assembly by a transversely directed An illuminating projectile BUbstantiall as hereinbefore described by way of example and with reference to the accompanying For the Applicants REINHGLD CORN AND PARTNERS insufficientOCRQuality