US2825284A - Impact fuzes with mechanical retardation - Google Patents

Impact fuzes with mechanical retardation Download PDF

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Publication number
US2825284A
US2825284A US532929A US53292955A US2825284A US 2825284 A US2825284 A US 2825284A US 532929 A US532929 A US 532929A US 53292955 A US53292955 A US 53292955A US 2825284 A US2825284 A US 2825284A
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US
United States
Prior art keywords
rod
striker
fuze
projectile
impact
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
US532929A
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English (en)
Inventor
Kuhn Georges
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.)
Mefina SA
Original Assignee
Mefina SA
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
Application filed by Mefina SA filed Critical Mefina SA
Application granted granted Critical
Publication of US2825284A publication Critical patent/US2825284A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F42C15/18—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
    • F42C1/02—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze
    • F42C1/08—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze with delayed action after ignition of fuze or after impact
    • 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
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F42C15/22—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin using centrifugal force
    • 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
    • F42C9/14—Double fuzes; Multiple fuzes
    • F42C9/141—Impact fuze in combination with a clockwork time fuze
    • 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
    • F42C9/14—Double fuzes; Multiple fuzes
    • F42C9/16—Double fuzes; Multiple fuzes for self-destruction of ammunition
    • F42C9/18—Double fuzes; Multiple fuzes for self-destruction of ammunition when the spin rate falls below a predetermined limit, e.g. a spring force being stronger than the locking action of a centrifugally-operated lock

Definitions

  • the upper end of the rod 8 is located in the path of I the rod of the pusher 13 located in the head of the body z i the striker 5.
  • Said fuzes are not very sensitive and have no C, in the known manner, and adapted to be moved towards the interior of the said body on impact.
  • the other end of the rod 8 comprises a stop 8b which in the normal position is located opposite the bolt 7 of The operation of said fuze is as follows:
  • the auto-destruction device formed by the balls 11, the inclined surfaces 11a and the body 10, produces, under the action of centrifugal force, the compression of the spring 12 of the rod 8 and, at the same time, the locking "members of said rod move radially and release the shoulder 8a.
  • the fuze can operate, either on impact, 'or by reason of the operation of the autotype of. fuze the retardation on impact is obtained by pyro-technical means which, however, are difiicult to store and operate in a very irregular manner, causing much longer periods of retardation or do not even provide it at all. i
  • the present invention has for its subject a sensitive fuze operating on impact with a mechanical delay and of which the striker is subjected to the action of a spring.
  • Fig. 1 is an axial section.
  • Figs. 2 and 3 are cross-sections to a larger scale on the line IIII of Fig. 1 in the normal position and in the cocked position.
  • the fuze has a body C in which is located the main charge 1 of the detonator, with a relay 2 adapted to transmit to said charge the action of the combined percussion cap 3.
  • the latter is mounted on an oscillating member 4 pivoted eccentrically at 4a.
  • Said member comprises a toothed sector 4b gearing with a pinion 40 forming part of the rocker release mechanism 4d.
  • This assembly forms a safety device for the detonator, as in the normal position, the percussion cap 3 is withdrawn from the path of the striker 5 and from the relay 2. It can only be moved opposite these members, after firing the projectile, under the action of centrifugal force.
  • the striker 5 is formed by a sliding rod subjected to the action of a spring 6, which at one end bears against a shoulder 5c of the body of the fuze and, on the other end, against a shoulder 5a of the rod 5, provided with a conical surface 5b.
  • the striker is located eccentrically in the body C and parallel to the axis of the latter.
  • the conical part 5b of the striker is in contact with a bolt 7, with a rounded end 7a, and which slides in a radial bore located in a plane perpendicular to the axis of the body C.
  • the explosion must be caused by the auto-destruction means including the axially movable body 10, the balls 11, and the spring 12 operating in the following manner:
  • the fuze need not comprise an auto-destruction device, or the safety device for the detonator and for the trajectory for maintaining percussion cap 3 out of reach of the striker 5, until the end of the safety path of travel of the trajectory.
  • the pusher 13 may form part of the rod 8.
  • Variations in the. retardation of the; release ofthe striker may be obtained by selection of the strength of its spring 6, the conicity of its part 5b and the size of its bolt 7.
  • a sensitive fuze for a projectile having a projectile charge comprising, in combination, a fuze body having an axis, a pusher member positioned in said body at its head portion and along said axis, an axially slidable ramming rod positioned in said body oppositely to said pusher rod at its upper end and alongsaid axis of said fuze body, said ramming rod having a shoulder portion intermediate its ends and a stop member at its lower end, centrifugal locking members positioned about said ramming rod about the portion thereof intermediate said shoulder portion and said stop member, said locking members abutting said shoulder portion of said ramming rod, an axially movable body positioned about said ramming rod at the portion thereof having said shoulder portion, first spring means positioned about said ramming rod for holding said axially movable body in position, ball means for causing said axially movable body to move downwardly against said spring means, a striker rod having a striking end, said strike

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Air Bags (AREA)
US532929A 1954-11-05 1955-09-07 Impact fuzes with mechanical retardation Expired - Lifetime US2825284A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH772918X 1954-11-05

Publications (1)

Publication Number Publication Date
US2825284A true US2825284A (en) 1958-03-04

Family

ID=4535558

Family Applications (1)

Application Number Title Priority Date Filing Date
US532929A Expired - Lifetime US2825284A (en) 1954-11-05 1955-09-07 Impact fuzes with mechanical retardation

Country Status (5)

Country Link
US (1) US2825284A (ja)
BE (1) BE539348A (ja)
CH (1) CH318216A (ja)
FR (1) FR1126738A (ja)
GB (1) GB772918A (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2984184A (en) * 1957-03-28 1961-05-16 Cetre Jeanne Marie Louise Fuse for gyrating and non-gyrating projectiles
US3039392A (en) * 1958-07-25 1962-06-19 Mefina Sa Projectile fuze for a gun with a rifled bore
US3075465A (en) * 1957-07-23 1963-01-29 Magnavox Co Centrifugal fuze
US3118379A (en) * 1960-11-23 1964-01-21 Fuze for a gyratory projectile
US3135206A (en) * 1956-09-21 1964-06-02 Bofors Ab Fuze for projectiles

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL101335C (ja) * 1957-02-26
DE1202181B (de) * 1963-05-31 1965-09-30 Junghans Geb Ag Transportsicherungsvorrichtung fuer Uhrwerks-zeitzuender fuer drallose Geschosse
DE1218311B (de) * 1963-08-01 1966-06-02 Junghans Geb Ag Drallgeschosszuender fuer UEbungsgeschosse
DE1208222B (de) * 1963-12-14 1965-12-30 Salgad Ets Aufschlagzuender fuer Geschosse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523073A (en) * 1924-03-13 1925-01-13 Anonima Arturo Junghans Soc Mechanical time fuse
US2149469A (en) * 1935-08-27 1939-03-07 Edgar Brandt Timing and release mechanism for mechanical time fuses
US2701527A (en) * 1948-07-06 1955-02-08 Louis P Granath Selective delayed-action fuze
US2718850A (en) * 1951-04-13 1955-09-27 Mefina Sa Clockwork movement for a projectile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523073A (en) * 1924-03-13 1925-01-13 Anonima Arturo Junghans Soc Mechanical time fuse
US2149469A (en) * 1935-08-27 1939-03-07 Edgar Brandt Timing and release mechanism for mechanical time fuses
US2701527A (en) * 1948-07-06 1955-02-08 Louis P Granath Selective delayed-action fuze
US2718850A (en) * 1951-04-13 1955-09-27 Mefina Sa Clockwork movement for a projectile

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3135206A (en) * 1956-09-21 1964-06-02 Bofors Ab Fuze for projectiles
US2984184A (en) * 1957-03-28 1961-05-16 Cetre Jeanne Marie Louise Fuse for gyrating and non-gyrating projectiles
US3075465A (en) * 1957-07-23 1963-01-29 Magnavox Co Centrifugal fuze
US3039392A (en) * 1958-07-25 1962-06-19 Mefina Sa Projectile fuze for a gun with a rifled bore
US3118379A (en) * 1960-11-23 1964-01-21 Fuze for a gyratory projectile

Also Published As

Publication number Publication date
CH318216A (fr) 1956-12-31
GB772918A (en) 1957-04-17
BE539348A (ja)
FR1126738A (fr) 1956-11-29

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