GB789761A - Improvements in projectile fuzes - Google Patents

Improvements in projectile fuzes

Info

Publication number
GB789761A
GB789761A GB2664955A GB2664955A GB789761A GB 789761 A GB789761 A GB 789761A GB 2664955 A GB2664955 A GB 2664955A GB 2664955 A GB2664955 A GB 2664955A GB 789761 A GB789761 A GB 789761A
Authority
GB
United Kingdom
Prior art keywords
piston
bolt
ring
fuze
gases
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2664955A
Inventor
Michel Precoul
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOC TECH DE RECH IND
Technique de Recherches Industrielles et Mecaniques
Original Assignee
SOC TECH DE RECH IND
Technique de Recherches Industrielles et Mecaniques
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DES45557A external-priority patent/DE1091462B/en
Application filed by SOC TECH DE RECH IND, Technique de Recherches Industrielles et Mecaniques filed Critical SOC TECH DE RECH IND
Priority to GB2664955A priority Critical patent/GB789761A/en
Publication of GB789761A publication Critical patent/GB789761A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42CAMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/28Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/30Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids of propellant gases, i.e. derived from propulsive charge or rocket motor

Abstract

789,761. Ammunition fuzes. SOC. TECHNIQUE DE RECHERCHES INDUSTRIELLES -ET MECANIQUES. Sept. 16, 1955, No. 26649/55. Class 9(1) A base fuze for a rifle grenade which is armed by the propellent gases has a body 1- in which a bolt 2 is secured by shear pins 3 to prevent the escape from a sleeve 4 of -a ball 6 latching a striker 5. On launching the grenade, the propellant. gases pass through the tail S and act on a piston 2 extending from the bolt 2. The pins 3 shear and the bolt moves forwards until it abuts a cushion 4<SP>1</SP>, e.g. of lead, stressing a spring 9 as it moves. The gases prevent the return of the bolt 2, until the grenade leaves the rifle when the spring 9 thrusts the bolt against the end 10 of the tail tube. The ball 6 then escapes freeing the striker and arming the fuze for actuation on impact, when the striker moves forward due to inertia to strike a detonator 8. When the grenade is to be discharged by a cartrige fitted with a wad or dummy bullet, the piston 2 has a domed head to reduce the possibility of jamming or deformation of the piston by solid debris from the cartridge. To further protect the piston, filtering orifices for the gases may be provided at the forward end of the tail tube. The fuze may also be mounted in a selfpropelled projectile between the motor and the war-head as in Fig. 5. The base a of the fuze forms the front closure of the motor and supports a partition c which guides the piston 2'. Filter orifices 11 for the gases communicate with a chamber 12, which in turn communicates with the piston chamber 13 through a hole 114, to assist the filtering action. Additional filtering means may be provided comprising a cushion 15 of thin copper, within the motor, a second cushion 16 before the opening 114 and an annular baffle 17 in the chamber 12. A further expansion chamber 18 may be formed in the piston 2'. In Fig. 6 the bolt 27 with integral piston 27<SP>1</SP> is held by a circlip 29 against a ring 24 secured by shear pins 25. Within the bolt is a safety ring, 30 held against the ring 24 by a ball 31 and by a circlip 32 surrounding the striker sleeve 20. On discharge of the grenade, the gases push the bolt 27 against ring 24, the pins 25 shear, and the ring 24 moves towards a washer 34, preferably of lead, and the ball 31 escapes into an annular space 34<SP>1</SP>. As the projectile decelerates, spring 33 pushes the ring 30 forwards and the ball 22 frees the striker. The ring 30 may be replaced by a ring locked by balls housed in the pistoncarrying bolt, which bolt is itself secured by shear pins as in Fig. 2. In a modification of Fig. 5, the chamber 13 has an annular inwardly projecting flange surrounding the piston with small clearance for the piston. A layer of fusible material, such as paraffin wax or tallow, is also placed over the axial passage leading from the propellent chamber to the piston, to prevent unburnt matter entering the fuze and to provide a lubricant for the fuze passages.
GB2664955A 1955-09-16 1955-09-16 Improvements in projectile fuzes Expired GB789761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2664955A GB789761A (en) 1955-09-16 1955-09-16 Improvements in projectile fuzes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES45557A DE1091462B (en) 1955-09-13 1955-09-13 tensionable by gas contact fuze for projectiles
GB2664955A GB789761A (en) 1955-09-16 1955-09-16 Improvements in projectile fuzes

Publications (1)

Publication Number Publication Date
GB789761A true GB789761A (en) 1958-01-29

Family

ID=10246979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2664955A Expired GB789761A (en) 1955-09-16 1955-09-16 Improvements in projectile fuzes

Country Status (1)

Country Link
GB (1) GB789761A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099961A (en) * 1962-02-13 1963-08-06 Albert M Stott Multi-choice firing mechanism
EP0354088A1 (en) * 1988-08-04 1990-02-07 GIAT Industries Device for opening projectile fins

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3099961A (en) * 1962-02-13 1963-08-06 Albert M Stott Multi-choice firing mechanism
EP0354088A1 (en) * 1988-08-04 1990-02-07 GIAT Industries Device for opening projectile fins
FR2635178A1 (en) * 1988-08-04 1990-02-09 France Etat Armement Opening opening device for obus

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