US3451340A - Percussion fuze including rotary delay provisions - Google Patents

Percussion fuze including rotary delay provisions Download PDF

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Publication number
US3451340A
US3451340A US652827A US3451340DA US3451340A US 3451340 A US3451340 A US 3451340A US 652827 A US652827 A US 652827A US 3451340D A US3451340D A US 3451340DA US 3451340 A US3451340 A US 3451340A
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United States
Prior art keywords
drum
fuze
plate
detonator
groove
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Expired - Lifetime
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US652827A
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English (en)
Inventor
Boris Batou
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ANSTALT TAMERLAN
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ANSTALT TAMERLAN
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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
    • F42C15/184—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 using a slidable carrier
    • 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
    • F42C15/188—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 using a rotatable carrier

Definitions

  • a percussion fuze having a generally circular plate, an eccentric shaft extending parallel to the axis of the plate, a drum having a central aperture and rotatable about the shaft, a tiring pin, a detonator carried by the drum, a spiral spring having an end fast ⁇ with the plate and an end fast with the drum, the shaft having on its surface a sinusoidal groove the frequency axis of which extends in the direction of rotation of the drum and a lug fast with the drum and engaging in the groove, the arrangement being such that, after the spring has been wound up, a rotary movement can be imparted to the drum by the unwinding of the spring while an alternating
  • This invention relates to a percussion fuze for a projectile and having a mechanism for delaying the arming of the fuze.
  • a percussion fuze comprising a generally circular plate, an eccentric shaft extending parallel to the axis of said plate and integral therewith, a drum having a central aperture and mounted for rotation about said shaft, a tiring pin, a detonator which is carried by said drum, a spiral spring of which one end is fast with the plate while the other end is fastened to the drum, said shaft being formed over at least a portion of its surface a sinusoidal groove the frequency axis of which extends in the direction of rotation of the drum and a lug fast with the drum and engaging in said groove, the arrangement being such that, after the spring has been wound up, a rotary movement can be imparted to the drum by the unwinding of the spring while an alternating axial movement is imparted to the drum by virtue of the engagement of said lug in the groove, thereby to bring the detonator into a position where it can engage or be engaged by the tiring pin.
  • the compound movement of the fuze drum delays the rotation of said drum by the combined effects of the sinusoidal groove on the surface, of the moment of inertia opposed to the movement by the mass of the drum and of the action of the spring, which acts both by torsion and by extension.
  • FIG. 1 is an axial section of the fuze according to the invention in a safety position
  • FIG. 2 is a plan view of the fuze shown in FIG. l;
  • FIG. 3 is an axial section of a detail of the fuze shown in FIGS. l and 2;
  • FIG. 4 is another axial section of the ffuze shown in FIGS. 1 to 3, in the armed position;
  • FIG. 5 is a plan view of the fuze in the position shown in FIG. 4;
  • FIGS. 6 and 7 show, respectively, an axial section and a plan view of another embodiment of the fuze according to the invention in its safety position;
  • FIGS. 8 and 9 show, respectively, an axial section and a plan view of the fuze shown in FIGS. 6 and 7 in its armed position;
  • FIG. 10 is a side elevation of a detail of the fuze shown in FIGS. l to 5 or 6 to 9.
  • the fuze there shown comprises a plate 1 of generally circular shape which is formed with a central tone 2, and which is formed with an externally threaded collar 3, ⁇ 4 for fastening the fuze to the body of a projectile (not shown).
  • the orifice 2 is internally threaded at its lower end and the envelope 5 of an explosive relay 6 is screwed into the internally threaded lower end.
  • the upper face of the plate 1 is formed with an integral upstanding eccentric shaft 7 which is formed with an axial recess 8 which accommodates a spiral spring 9, the lower extremity 10 of Which passes through an aperture 11 in the plate 1, where it is held.
  • the other extremity 12 of the spring passes through an aperture 13 arranged in the upper face of a drum 14.
  • the drum 14 has a central recess 15 and is mounted for rotation about the shaft 7 and caps said shaft, while a portion 16 of the drum 14 projects into the bottom of the central recess 15 and engages into the axial recess 8 of the shaft 7.
  • the shaft 7 is formed over at least a portion of its cylindrical surface (e.g. 7A; of its surface) with a sinusoidal groove 17 the frequency axis (x-axis) of which extends in the direction of rotation of the drum.
  • a sinusoidal groove 17 the frequency axis (x-axis) of which extends in the direction of rotation of the drum.
  • FIG. 10 shows the plane development thereof.
  • a lug 18 carrying a blocking head 19 is disposed n a radial aperture 21 of the drum 14 and is fast with the latter, engaging with its extremity 22 in the groove 17.
  • the lug 18 is arranged in the drum 14 in such a manner with regard to the position and shape of the groove 17, that in the safety position (FIG. l) the drum 14 rests with its base on the upper surface of the plate 1.
  • the drum 14 is also formed with two eccentric whils 23 (FIGS. 1 and 2) and 24 (FIG. 4) which extend parallel to the axis of the fuze, and of which the rst (23) serves to accommodate the extremity of a plunger 25, the upper portion of which passes through an aperture in the plate 1.
  • the lower portion of the plunger 25 is of greater diameter than the upper portion and is located below said plate 1.
  • the aperture 24 is intended to accommodate a detonator 26 capped by a metal ring 27 (FIG. 4).
  • the detonator 26 is held in the lower portion of the orifice 24 by a ball 28 lodged partly in a transverse bore 29 of the drum 14, said bore opening into the orifice 24, the ball 28 projecting above the ring 27 and the detonator 26.
  • the ball 28 is maintained in this position by a finger 30 extending parallel to the axis of drum ⁇ 14 and fast with the plate 1.
  • the orifice 24 is closed by the base 31 of a firing pin 33 the base engaging the drum at 32.
  • a spacing element for example a spiral spring 34a, may be interposed between the ring 27 fast with the detonator 26 and the base 31 of the firing pin 33.
  • the plunger 25 is held in place by a shearing pin 34 extending transversely through a portion of the drum 14 and through the plunger 25.
  • a shearing pin 34 extending transversely through a portion of the drum 14 and through the plunger 25.
  • the whole of the upper portion of the plate 1 is covered by a cap 35 held by a peripheral flange 36 of the plate 1. It will be noted that in FIGS. 2 and 5 the cap 35 is supposed to be removed, in order to render visible the other elements of the fuze located on the upper surface of plate 1.
  • FIGS. 6 to 9 show a modified form of embodiment of the fuze according to the invention, in which a cap 37, engaging the periphery of the plate 1 at 38, has an axial chimney 39, the base of which carries a tiring pin 40, the height of which is smaller than that of said chimney.
  • the percussion elements namely the li-ring pin and the detonator
  • the detonator 26 is carried by the drum 14a.
  • the detonator 26 is fast with a metal tube 41 adapted for sliding movement in the cylindrical aperture of the drum accommodating it.
  • the sinusoidal groove 17, formed in the shaft 7 is identical to that shown in FIGS. 1, 2, 4 and 5.
  • the cap 37 may be covered by another cap 42.
  • the fuze according to the invention operates in the following manner:
  • the fuzes hereinabove described are particularly suitable for use with rifle or pistol grenades. They may be mounted in the head or into the base of the projectile.
  • a percussion fuze comprising a mounting plate, an eccentric shaft extending parallel to the axis of said plate and integral therewith, a drum having a central aperture .4 and mounted for both rotation Iand axial movement with respect to said shaft, a firing pin, a detonator which is carried by said drum, a spiral spring of which one end is fast with the plate while the other end is fastened to the drum, and rotation delaying means including a generally sinusoidal groove being formed over at least a portion of the surface of said shaft, the frequency axis of said groove extending in the direction of rotation of the drum and a lug fast with the drum and engaging in said groove for following the path of said groove, providing combined axial and rotary movement of said drum with respect to said shaft, said shaft having an axial recess which accommodates the spiral spring.
  • a percussion fuze comprising a mounting plate, an eccentric shaft extending parallel to the axis of said plate and integral therewith, a drum having a central aperture and mounted for both rotation and axial movement with respect to said shaft, a lfiring pin, a detonator which is carried by said drum, a spiral spring of which one end is fast with the plate while the other end is yfastened to the drum, and rotation delaying means including a generally sinusoidal groove being formed over at least a portion of the surface of said shaft, the frequency axis of said groove extending in the direction of rotation of the drum and a lug fast with the drum and engaging in said groove for following the path of said groove, providing combined axial and rotary movement of said drum with respect to said shaft, said drum being formed with two eccentric apertures, one of said apertures serving to accommodate the detonator and the remaining aperture receiving the extermity of a plunger which, in a safety position, passes through said plate, the aperature of said drum accommodating said detonator being provided in

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Air Bags (AREA)
  • Telescopes (AREA)
  • Automotive Seat Belt Assembly (AREA)
US652827A 1966-07-28 1967-07-12 Percussion fuze including rotary delay provisions Expired - Lifetime US3451340A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1092366A CH456403A (fr) 1966-07-28 1966-07-28 Fusée à percussion pour projectile

Publications (1)

Publication Number Publication Date
US3451340A true US3451340A (en) 1969-06-24

Family

ID=4368245

Family Applications (1)

Application Number Title Priority Date Filing Date
US652827A Expired - Lifetime US3451340A (en) 1966-07-28 1967-07-12 Percussion fuze including rotary delay provisions

Country Status (12)

Country Link
US (1) US3451340A (sv)
AT (1) AT280105B (sv)
BE (1) BE700228A (sv)
CH (1) CH456403A (sv)
DE (1) DE1578439A1 (sv)
DK (1) DK131358B (sv)
ES (1) ES343808A1 (sv)
FI (1) FI45138C (sv)
GB (1) GB1152909A (sv)
NL (1) NL6710330A (sv)
NO (1) NO120976B (sv)
SE (1) SE322148B (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135451A (en) * 1976-05-28 1979-01-23 Sarmac S.A. Fuze plug, particularly for use in a hand grenade
EP0318995A2 (de) * 1987-12-03 1989-06-07 DIEHL GMBH & CO. Pyrotechnischer Zünder für Geschosse
US20040221899A1 (en) * 2001-12-04 2004-11-11 Parsons Natan E. Electronic faucets for long-term operation
US20080078299A1 (en) * 2006-10-02 2008-04-03 Junghans Microtec Gmbh Projectile fuze

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2169691B (en) * 1984-12-10 1988-08-03 British Aerospace Projectiles
DE3833816A1 (de) * 1988-10-05 1990-04-19 Messerschmitt Boelkow Blohm Sicherungseinrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1545866A (en) * 1924-09-30 1925-07-14 Bethlehem Steel Corp Instantaneous impact fuse for high-explosive shells
US2595757A (en) * 1946-11-02 1952-05-06 Energa Fuse
US2893322A (en) * 1956-09-05 1959-07-07 Dixi Sa Percussion fuse
US2925778A (en) * 1957-03-15 1960-02-23 Stewart Warner Corp Helix type delay detent
US3017781A (en) * 1960-03-25 1962-01-23 John F Toomey Geared timing mechanism
US3157125A (en) * 1963-07-01 1964-11-17 Honeywell Inc Rotor safety lock for munition fuze
US3320891A (en) * 1965-10-04 1967-05-23 Avco Corp Delayed action fuze

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1545866A (en) * 1924-09-30 1925-07-14 Bethlehem Steel Corp Instantaneous impact fuse for high-explosive shells
US2595757A (en) * 1946-11-02 1952-05-06 Energa Fuse
US2893322A (en) * 1956-09-05 1959-07-07 Dixi Sa Percussion fuse
US2925778A (en) * 1957-03-15 1960-02-23 Stewart Warner Corp Helix type delay detent
US3017781A (en) * 1960-03-25 1962-01-23 John F Toomey Geared timing mechanism
US3157125A (en) * 1963-07-01 1964-11-17 Honeywell Inc Rotor safety lock for munition fuze
US3320891A (en) * 1965-10-04 1967-05-23 Avco Corp Delayed action fuze

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135451A (en) * 1976-05-28 1979-01-23 Sarmac S.A. Fuze plug, particularly for use in a hand grenade
EP0318995A2 (de) * 1987-12-03 1989-06-07 DIEHL GMBH & CO. Pyrotechnischer Zünder für Geschosse
EP0318995A3 (en) * 1987-12-03 1990-04-18 Diehl Gmbh & Co. Pyrotechnical initiator for projectiles
US20040221899A1 (en) * 2001-12-04 2004-11-11 Parsons Natan E. Electronic faucets for long-term operation
US20080078299A1 (en) * 2006-10-02 2008-04-03 Junghans Microtec Gmbh Projectile fuze
EP1909059A1 (de) 2006-10-02 2008-04-09 JUNGHANS Microtec GmbH Geschosszünder
US7614346B2 (en) 2006-10-02 2009-11-10 Junghans Microtech Gmbh Projectile fuze with fuze electronics including a timer/counter

Also Published As

Publication number Publication date
SE322148B (sv) 1970-03-23
DE1578439A1 (de) 1970-07-16
DK131358B (da) 1975-06-30
AT280105B (de) 1970-03-25
DK131358C (sv) 1975-11-24
BE700228A (sv) 1967-12-01
FI45138C (sv) 1972-03-10
ES343808A1 (es) 1968-09-16
CH456403A (fr) 1968-07-31
GB1152909A (en) 1969-05-21
NL6710330A (sv) 1968-01-29
FI45138B (sv) 1971-11-30
NO120976B (sv) 1970-12-28

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