US2359752A - Percussion fuse - Google Patents

Percussion fuse Download PDF

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Publication number
US2359752A
US2359752A US346639A US34663940A US2359752A US 2359752 A US2359752 A US 2359752A US 346639 A US346639 A US 346639A US 34663940 A US34663940 A US 34663940A US 2359752 A US2359752 A US 2359752A
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US
United States
Prior art keywords
fuse
cap
cage
percussion
projectile
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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
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US346639A
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English (en)
Inventor
Prato Cesare Del
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Individual
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Individual
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Publication date
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Publication of US2359752A publication Critical patent/US2359752A/en
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Classifications

    • 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
    • F42C15/26—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 using centrifugal force

Definitions

  • This invention relates to percussion fuses, more particularly for use in rifled firearms of the artillery type.
  • This invention has utility when employed in connection with fuses which generate sufiicient centrifugal force in flight to cause its various parts to release the safety features thereof so it may cause explosion of its carrying shell upon impact.
  • Fig. 1 is an axial section through the fuse
  • Fig. 2 is an axial section through the fuse on a plane perpendicular to the showing in Fig. 1.
  • the fuse comprises a cup-shaped body I of suitable contour and exteriorly threaded for mounting in a projectile or shell.
  • This body is provided with a head and an open end through which the fire may pass when generated within the fuse to set off the contents of its carrying shell.
  • rotatable cage 5 Mounted within the body I on bearings 6, 23, is rotatable cage 5, which is restrained from axial shifting by bearings 3 at its inner end and by nose 24 at its outer end abutting against the head portion.
  • Axially extending from the inner end of the cage 5 is cylindrical cavity 1 having an enlarged inner peripheral chamber IS a little more than half the distance toward the head.
  • the chamber 55 is provided with a wall tapering downwardly toward the head then radially to a relatively small fire conduit 22 leading to a radially extending chamber 2
  • the conduit 22 continues from the opposite side of the chamber to communicate with branches is, which in turn extend to ducts l'l leading to the open end of the body I. Between the ducts I9, I? are chambers which may be filled with cylindrical powder charges I8.
  • cylindrical primer carrier member H having a seat intermediate its length carrying the detonator, or percussioncup.
  • a duct continuation from the seat extends slightly into a plug 20 in the chamber 2!, which is held in duct capping position as a safety means until the fuse is used for its intended purpose.
  • This plug 20 prevents any premature fire from the percussion-cap reaching the ducts I9 and the powder charges l8.
  • the opposite end of the cavity is sealed by a plug which mounts the firing pin 10 axially of the fuse and normally spaced from the percussion-cap.
  • Additional safety means are employed in the form of a lock to maintain the parts, as shown in the drawing.
  • a plurality of sockets parallel to and spaced from the fuse axis and a radial opening intersecting the sockets and in alignment with an opening through the pin carrying plug.
  • a ball 8 oppositely abutted by a pair of cylinders 9 whose opposite termini are at the wall of the sockets.
  • pins [3 in abutment with the cylinders 9. The pins are held in cylinder locking position by springs M. The pins are restrained in the sockets by plugs 4.
  • An enveloping sheath I2 encloses the cage 5 thereby preventing the safety member from leaving the cage and interfering with the normal operation.
  • the cycle of operation begins with the pins [3, whose mass or inertia is sufficient to move against the resistance of the springs 14, out of contact with the cylinders 9. Then when the cage has reached a sufficient speed of rotation, the centrifugal force causes the cylinders to move outwardly and away from contact with the firingpin plug and the percussion-cap carrying member H, which is now free to move. Balls 16, between this member and the tapered cam face of chamber I5 moving outwardly, urge the member II toward the firing pin, thereby withdrawing the extension of member II from plug 20. This plug is then centrifugally moved to uncover the duct extension.
  • the striking of the shell against its objective causes the percussion-cap to strike the firing-pin to be ignited and the fire passes from member H, through chamber 2
  • a percussion fuse for rotatable projectiles comprising, a casing adapted to be secured to a projectile and having a cylindrical cavity therein arranged axially of the projectile, a body member rotatably mounted in said cylindrical cavity, a cap carrier slidably mounted in said body member, said body member having a passage therein terminating adjacent said cap carrier; a block radially movable in said body memher, means carried by the cap carrier retaining said block in a position to close said passage, a firing pin carried by said body member extending towards said cap carrier, a.
  • a casing adapted to be secured to a projectile and having a cylindrical cavity therein arranged axially of the projectile, a cage rotatrably mounted in said cavity, a cap carrier slidably mounted in said cage, said cage having a passage therein terminating adjacent said cap carrier, a block radially movable in said cage, means carried by said cap carrier retaining said block in a position to close said passage and releasable on forward movement ofsaid cap carrier to open said passage, means retaining said cap carrieragainst forward movement and movable on rotary movement of said cage to release said cap carrier,.and inertia means for retaining said last named means and movable to release said last named means on acceleration of'said CESARE DEL PRATO.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
US346639A 1939-08-31 1940-07-20 Percussion fuse Expired - Lifetime US2359752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT223562X 1939-08-31

Publications (1)

Publication Number Publication Date
US2359752A true US2359752A (en) 1944-10-10

Family

ID=11195138

Family Applications (1)

Application Number Title Priority Date Filing Date
US346639A Expired - Lifetime US2359752A (en) 1939-08-31 1940-07-20 Percussion fuse

Country Status (5)

Country Link
US (1) US2359752A (xx)
BE (1) BE439567A (xx)
CH (1) CH223562A (xx)
DE (1) DE742559C (xx)
FR (1) FR871818A (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748707A (en) * 1945-06-23 1956-06-05 Raymond L Graumann Auxiliary detonator fuze for antiaircraft projectile
US2779286A (en) * 1953-07-15 1957-01-29 Robert P Marshall Delay plunger assembly for artillery type fuses
US3726229A (en) * 1971-02-04 1973-04-10 Us Navy Inertial delay fuze
USB403140I5 (xx) * 1973-10-03 1975-01-28
US4281600A (en) * 1978-03-08 1981-08-04 Forenade Fabriksverken Subprojectile to be expelled from a projectile
US4284007A (en) * 1978-03-08 1981-08-18 Forenade Fabriksverken Projectile with at least one expellable subprojectile

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL103346C (xx) * 1957-04-25
DE1202181B (de) * 1963-05-31 1965-09-30 Junghans Geb Ag Transportsicherungsvorrichtung fuer Uhrwerks-zeitzuender fuer drallose Geschosse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL25799B (xx) * 1922-12-20
NL29606C (xx) * 1930-06-04
FR807565A (fr) * 1935-02-19 1937-01-15 Anciens Ets Skoda Fusée percutante à relais, comportant un deuxième temps de destruction
FR809830A (fr) * 1935-11-29 1937-03-10 Schneider & Cie Fusée percutante de tête avec sécurité centrifuge mobile en rotation par rapport au projectile
CH201983A (de) * 1938-01-28 1938-12-31 Wallimann Isidor Geschosszünder.

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748707A (en) * 1945-06-23 1956-06-05 Raymond L Graumann Auxiliary detonator fuze for antiaircraft projectile
US2779286A (en) * 1953-07-15 1957-01-29 Robert P Marshall Delay plunger assembly for artillery type fuses
US3726229A (en) * 1971-02-04 1973-04-10 Us Navy Inertial delay fuze
USB403140I5 (xx) * 1973-10-03 1975-01-28
US3913486A (en) * 1973-10-03 1975-10-21 Us Army Automatic delay graze sensitive fuze
US4281600A (en) * 1978-03-08 1981-08-04 Forenade Fabriksverken Subprojectile to be expelled from a projectile
US4284007A (en) * 1978-03-08 1981-08-18 Forenade Fabriksverken Projectile with at least one expellable subprojectile

Also Published As

Publication number Publication date
DE742559C (de) 1943-12-07
BE439567A (xx)
CH223562A (fr) 1942-09-30
FR871818A (fr) 1942-05-18

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