US2836118A - Fuse for an explosive projectile - Google Patents

Fuse for an explosive projectile Download PDF

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Publication number
US2836118A
US2836118A US455627A US45562754A US2836118A US 2836118 A US2836118 A US 2836118A US 455627 A US455627 A US 455627A US 45562754 A US45562754 A US 45562754A US 2836118 A US2836118 A US 2836118A
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United States
Prior art keywords
slide
fuse
striker
movement
detonator
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 - Lifetime
Application number
US455627A
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English (en)
Inventor
Hjelm Karl Erik Waldemar
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.)
Saab Bofors AB
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Bofors AB
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Publication date
Application filed by Bofors AB filed Critical Bofors AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/02—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/02—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means
    • F42C9/04—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means by spring motor
    • F42C9/041—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means by spring motor the clockwork activating a security device, e.g. for unlocking the firing-pin
    • F42C9/045—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means by spring motor the clockwork activating a security device, e.g. for unlocking the firing-pin and the firing-pin being activated by a spring
    • F42C9/046—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means by spring motor the clockwork activating a security device, e.g. for unlocking the firing-pin and the firing-pin being activated by a spring and the activating spring being the spring of the clock-work mechanism

Definitions

  • FIG- 2 A1- TORNE? m 8 2 J Y H m M H W K E W HJELM FUSE FOR AN EXPLOSIVE PROJECTILE H Q m 2,836,118 Patented May 27, 1958 FUSE FOR AN EXPLOSIVE PRGJECTILE Karl Erik Waldemar Hjelm, Bofors, Sweden, assignor to Aktiebolaget Bofors, Bofers, Sweden, a Swedish corporation Application September 13, 1954, Serial No. 455,627
  • the present invention relates to self-arming, striker operated fuses for explosive projectiles, more particularly to self-arming, striker operated fuses which are selfdetonating a predetermined period of time after having become armed.
  • One of the objects of the present invention is to provide a novel and improved fuse of the general type above referred to, which is reliable and accurate in operation and simpler in design than fuses of the said type as heretofore known.
  • Another object of the invention is to provide a novel and improved fuse of the general type above referred to which, in response to the force of inertia acting upon the projectile upon which the fuse is mounted, automatically becomes armed and initiates a timing means which in turn causes detonation of the fuse if the same is not detonated by actuation of the striker during the period of time for'which the timing means is set.
  • Fig. 1 is an isometric view of a fuse according to the invention in its safety position.
  • Fig. 2 is a fragmentary isometric view of the timing means of the fuse.
  • Fig. 3 is an isometric view similar to Fig. l but showing the fuse in its armed position
  • Fig. 4 is an isometric view similar to Figs. 1 and 3 but showing the components of the fuse in the positions ready for self-detonation of the fuse.
  • the fuse mechanism is housed in a conventional casing or housing formed by a cylindrical part 1 and a conical part 2.
  • the fuse mechanism comprises control slides 3 and 4 axially displaceable, for instance in bores provided for this purpose in housing part 1.
  • Each slide has rack teeth 5 and 6 respectively which constitute part of the timing means more clearly f shown in Fig. 2.
  • the timing means comprise gear shaft 7 in mesh with rack 5.
  • Shaft 7 seats a gear 9 in mesh with a gear 11' on a shaft 1'
  • This shaft supports one component 13 of a suitable step-by-step device, the other component 14 of which is pivoted to housing part 1 by means of a pivot pin 15.
  • the step-by-step device is exemplified by the ratchet or escape wheel 13 coacting with the pawl 14.
  • Gear shaft 7 is engaged by a gear 16 seated upon a shaft 17 also supporting a gear 13.
  • This gear is in engagement with a gear 10 seated upon a gear shaft 8 in mesh with rack teeth 5 of slide
  • a spring 19 disposed in alignment with slide 4 urges, when loaded, slide 4 toward the nose of the fuse under the control of the timing means.
  • one end of spring 19 is anchored within housing part 1 and the other end abuts against slide 4.
  • the fuse mechanism further comprises a slide 21 which a is transversely slidableyfor instance in a bore provided for this purpose in housing part 1.
  • the length of this transverse bore is such that slide 21 may move from the position shown in Fig. l in heavy lines into the position shown in 'thin lines.
  • a spring 22 urges slide 21 into the latter position.
  • the slide has a transverse here or recess which is filled with a suitable ignition charge 23. Accordingly, slide 21 is sometimes hereinafter referred to as detonator slide. in the position of Fig. 1 retains slide 21 in the heavy line position whereas in the position of Fig. 3, slide 3 permits movement of slide 21 into the thin line position of Fig. l by the action of spring 22.
  • the fuse mechanism also comprises a striker pin 24 which is mounted axially movable in housing part 1.
  • the end of the striker facing de'tonator slide 21 is preferably pointed 111325 and formed with a collar 26.
  • the opposite end of striker pin 24 mounts a disc 27 which serves as a plunger axially displaceable in a sleeve 28.
  • a spring 29 fitted in sleeve 28 biases the striker pin into a position in which point 25 is spaced apart from detonator slide 21.
  • the fuse mechanism finally comprises a two-arm lever 30 pivotally mounted within housingpart 1.
  • One arm of the lever coacts with collar 26 of striker pin 24 for the purpose of actuating the striker as will be more fully explained hereinafter.
  • the other arm of lever 30 may coact with the respective end of slide 4 which for this purpose is preferably .provided with a slanted head 4.
  • a pin 31 serves to limit the axial movement of slide 3 toward the nose of the fuse.
  • slide 3 occupies its uppermost position, that is, a position closest to the nose of the fuse. Slide 3 abuts against limit pin 31. As a result, the respective end of detonator slide 21 abuts against slide 3 so that the detonator slide is locked or retained in its safety position. Slide 4 is shown in an intermediate position below the detonator slideZl.
  • striker point 25 will strike a wall portion of detonator slide 21 so that the fuse cannot be accidentally detonate-d.
  • the slide coacts with slide 3 which fore slide head 4 makes contact with lever 30, the pro- .jectile strikes a target the fuse is detonated by the resultant actuation of striker 24.
  • striker is not actuated during the interval of time required for slide head 4' to move from the position of Fig. 3 into the position of Fig. 4, the slide head will force lever 30 into the position of Fig. 4 thereby actuating the striker and hence detonating the fuse.
  • the action of slide 4 assures that the fuse is detonated at the end of a predetermined period of time after it has become armed thereby effectively preventing that an armed projectile falls back upon the ground.
  • the detonation of the explosive charge of the projectile initiated by the ignition or detonation of charge 23 is effected in a conventional manner'and a detailed description thereof is not essential for the understanding of the invention. It suffices to state that the ignition of the charge in the detonator slide initiates a chain reaction causing the explosion of the charge of the projectile which is also not shown.
  • a striker operated and time controlled fuse for an explosive projectile comprising, in combination, a fuse housing, a movable striker, a charge containing detonator slide coacting with the striker for setting off said charge by the striker and movable between a safety position and 'ly displaceable transversely thereto, the'force of inertia acting upon a fuse mounted on a projectile in flight eifecting an axial displacement of said first and second control slides in one direction, the axial displacement of said first control slide causing movement of the same into the second position releasing the detonator slide, striker actuating means engageable and movable by said second control slide, axial movement of the second control slide in the direction opposite to the aforesaid one direction operating said striker actuating means, means biasing the second control slide towards said opposite direction for operating the striker actuating means, and timing means controlling the rate of axial movement of the second control slide into said opposite direction whereby the striker is actuated a predetermined period of
  • striker actuating means comprise lever means pivotally mounted in coacting relationship with the striker and the second control slide, movement of said second control slide into 'said opposite direction effecting engagement of said second control slide with said lever means to pivot said lever means into an actuating engagement with said striker.
  • biasing means comprise compression spring means fixed at one end and engaged at the opposite end by said second control slide, said spring means being adapted to be compressed by movement of said second control slide into the direction caused by the force of inertia.
  • a striker operated and'time controlled fuse for an explosive projectile comprising, in combination, a moveable striker, a charge containing detonator slide coating with the striker for setting off th'echarge of the striker and movable between a safety position and an armed position, a first control slide movable between a first position retaining the detonator slide in the safety position thereof and a second position releasing the said detonator slide for movement into the armed position, a second moveable control slide, the said first and second control slides being disposed for movement in one direction by the force of inertia acting upon a fuse mounted on a projectile in flight, the inertia movement of the first control slide effecting movement thereof into the position releasing the detonator slide, striker actuating means engageable and operable by a movement of the second slide in a direction opposite to the aforesaid direction, timing means coupled with said control slides and controlling the rate of movement thereof, release means releasing the first control slide from the timing means
  • timing means comprise a speed limiting means and a step-bystep motion transmitting means coupling the control slides with said speed limiting means, and wherein the said release means'cornprise means disengaging said mo tion transmitting means from the first control slide, in response to movement of 'said first control slide'to a predetermined position.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Air Bags (AREA)
US455627A 1953-09-25 1954-09-13 Fuse for an explosive projectile Expired - Lifetime US2836118A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE326593X 1953-09-25

Publications (1)

Publication Number Publication Date
US2836118A true US2836118A (en) 1958-05-27

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US455627A Expired - Lifetime US2836118A (en) 1953-09-25 1954-09-13 Fuse for an explosive projectile

Country Status (5)

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US (1) US2836118A (de)
BE (1) BE532090A (de)
CH (1) CH326593A (de)
DE (1) DE962865C (de)
FR (1) FR1108518A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2951444A (en) * 1958-09-12 1960-09-06 Jr Clayton E Hunt Fuze arming and safety mechanism
US2989924A (en) * 1957-04-03 1961-06-27 Junghans Helmut Percussion fuses for unrotated projectiles
US2998944A (en) * 1958-12-15 1961-09-05 Rimmer William Delay mechanism
US3015277A (en) * 1957-05-20 1962-01-02 Junghans Helmut Percussion fuzes
US3020367A (en) * 1958-10-28 1962-02-06 Hughes Aircraft Co Inertial time delay switch
US3034438A (en) * 1958-03-28 1962-05-15 Mach Tool Works Oerlikon Fuze for rocket projectiles
US3101002A (en) * 1961-11-13 1963-08-20 Bernard Van Zyl Decelerometer
US3415191A (en) * 1959-08-31 1968-12-10 Army Usa Safety and arming mechanism
US3611941A (en) * 1969-02-11 1971-10-12 Ltv Aerospace Corp Igniting device
US3738273A (en) * 1960-09-29 1973-06-12 Us Navy Safety-arming device
US4389937A (en) * 1980-01-29 1983-06-28 Mefina S.A. Fuze for non-spinning projectiles
US5635667A (en) * 1994-06-16 1997-06-03 Etat Francais, Represente Par Le Delegegue General Pour L'armament Fuse plug pyrotechnic firing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991716A (en) * 1956-08-14 1961-07-11 Dorman D Israel Electrically operated fuze

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB396171A (en) * 1932-04-11 1933-08-03 Helmut Junghans Fuse for anti-aircraft shells
US1943706A (en) * 1930-08-07 1934-01-16 Varaud Andre Self-retarding mechanical percussion fuse for projectiles
US2685253A (en) * 1949-11-24 1954-08-03 Mach Tool Works Oerlikon Fuze for rocket projectiles

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE103976C (de) *
BE498538A (de) * 1949-11-24

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1943706A (en) * 1930-08-07 1934-01-16 Varaud Andre Self-retarding mechanical percussion fuse for projectiles
GB396171A (en) * 1932-04-11 1933-08-03 Helmut Junghans Fuse for anti-aircraft shells
US2685253A (en) * 1949-11-24 1954-08-03 Mach Tool Works Oerlikon Fuze for rocket projectiles

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989924A (en) * 1957-04-03 1961-06-27 Junghans Helmut Percussion fuses for unrotated projectiles
US3015277A (en) * 1957-05-20 1962-01-02 Junghans Helmut Percussion fuzes
US3034438A (en) * 1958-03-28 1962-05-15 Mach Tool Works Oerlikon Fuze for rocket projectiles
US2951444A (en) * 1958-09-12 1960-09-06 Jr Clayton E Hunt Fuze arming and safety mechanism
US3020367A (en) * 1958-10-28 1962-02-06 Hughes Aircraft Co Inertial time delay switch
US2998944A (en) * 1958-12-15 1961-09-05 Rimmer William Delay mechanism
US3415191A (en) * 1959-08-31 1968-12-10 Army Usa Safety and arming mechanism
US3738273A (en) * 1960-09-29 1973-06-12 Us Navy Safety-arming device
US3101002A (en) * 1961-11-13 1963-08-20 Bernard Van Zyl Decelerometer
US3611941A (en) * 1969-02-11 1971-10-12 Ltv Aerospace Corp Igniting device
US4389937A (en) * 1980-01-29 1983-06-28 Mefina S.A. Fuze for non-spinning projectiles
US5635667A (en) * 1994-06-16 1997-06-03 Etat Francais, Represente Par Le Delegegue General Pour L'armament Fuse plug pyrotechnic firing device

Also Published As

Publication number Publication date
CH326593A (de) 1957-12-31
DE962865C (de) 1957-04-25
BE532090A (de)
FR1108518A (fr) 1956-01-13

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