US2421266A - Fuse for ordnance projectiles or bombs - Google Patents

Fuse for ordnance projectiles or bombs Download PDF

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Publication number
US2421266A
US2421266A US237729A US23772938A US2421266A US 2421266 A US2421266 A US 2421266A US 237729 A US237729 A US 237729A US 23772938 A US23772938 A US 23772938A US 2421266 A US2421266 A US 2421266A
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US
United States
Prior art keywords
bolt
locking member
spring
fuse
movement
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
US237729A
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English (en)
Inventor
Honger Guido
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
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Publication of US2421266A publication Critical patent/US2421266A/en
Anticipated expiration legal-status Critical
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
    • F42C15/24—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • 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
    • 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
    • F42C15/44—Arrangements for disarming, or for rendering harmless, fuzes after arming, e.g. after launch
    • 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
    • F42C9/048—Unlocking of clockwork mechanisms, e.g. by inertia or centrifugal forces; Means for disconnecting the clockwork mechanism from the setting mechanism
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/02—Constructional details

Definitions

  • the invention relates to safety devices incorporated in the fuses of ordnance projectiles and bombs for the purpose of preventing premature ignition.
  • Such safety devices may broadly be divided into two groups, one for preventing ignition during transport and handling and the other for preventing premature ignition in the barrel of the gun or during a portion of the projectiles flight.
  • a common device is to use a bolt which is by inertia or centrifugal force, due to the flight of the projectile, removed from a position in which it restrains the exploder system from functioning.
  • Devices of this type must be specially designed for each type of fuse for which they are intended, and the careful and extensive tests required for each design render this a very expensive matter.
  • an escapement that is, a. clockwork mechanism including an escapement device controlling the turning of its gears, which comes into operation when the shot is fired or the bomb is released so that after a predetermined period a lock which renders the exploder system inoperative is put out of action.
  • the devices whereby such escapements are released are frequently sensitive to shocks such as may occur during the handling of the projectile, and an accidental shock may then start the escapement, generally without this being perceived.
  • the safety device is accordingly either put wholly out of action, so that the projectile is in what is called the armed state, or the armed state will, owing to the partial operation of the escapement, be established earlier than expected after the firing of the gun. In either case a serious accident is liable to occur. In the case of some escapements the cumulative effect of a series of small shocks may render the safety device inoperative.
  • the device In the safety device of my invention two methods of insuring safety are combined, and the device is one which can be incorporated in a fuse of any type.
  • the device is so constituted that for putting it out of action, so that the exploder system can function, it is necessary that two forces should come into operation, namely acceleration due to firing the projectile and a second, force which may be centrifugal force due to the spin of the projectile or the force of a spring released by the discharge of the projectile.
  • the centrifugal force removes from the path of a detonating member of the fuse a locking membe which in the safety position lies in that path, and the movement of the said locking member is controlled by a reversible escapement or clockwork mechanism. Movement of the locking member itself from the safety position is, however, normally prevented by a spring loaded bolt, which does not release the lockin member till it has by the acceleration of the projectile been removed from its normal position.
  • This bolt, and that part of the locking member which it engages, are so constituted that if a blow or shock causes relative movement of the locking member and bolt, so that the locking member is moved some way towards the off position, the return of the bolt to its normal position causes the locking member to be pushed back or rotated back to the safety position, the escapement being at the same time restored to its original condition.
  • Fig. 1 is an axial section showing the safety device and the relevant parts of the exploder system, the safety device being in operation.
  • Fig. 2 is a section of the line II-II of Fig. 1.
  • Fig. 3 is a section similar to Fig. 1, but on a smaller scale, showing the safety device somewhat removed from its operative position, but still capable of returning automatically to that position.
  • Fig. 4 is a section similar to Fig. 3, showing the safety device fully removed from its operative to its inoperative position.
  • Figs. 5 to 8 are views similar to Figs. 1, 2, 3 and 4 respectively, showing the second embodiment referred to, Fig. 6 being a, section on the line VIVI of Fig. 5.
  • Fig. 9 is a sectional view of Fig. 1 through the escapement mechanism taken on line 9-9 of Fig. 1.
  • the striker I0 is normally restrained from moving towards the detonating pellet H by a rack it.
  • the teeth IZa of the rack engage one of the wheels lZ'b of the gear train of an escapement or clockwork mechanism l3 holding the rack in the position shown in Fig. 1.
  • the holder it of the pellet It is likewise prevented by the rack from moving towards the striker Iii.
  • the function of the rack described with reference to Figs. 1 to 4 is performed by the time wheel 20, of the reversible escapement, and movement thereof is, in the safety position, prevented by a tongue on an annular weight 2! guided in the plate 22.
  • the inclined surface E9 of this tongue operates to impart rotational movement to the time wheel when the weight is restored to the safety position after being displaced by an accidental shock, instead of impar-ting radial movement, as does the tongue described with reference to Figs, 1 to 5.
  • the safety device of my invention can be applied to fuses of all kinds used in connection with ordnance projectiles and bombs, that is to say percussion fuses, graze or check action fuses, time fuses, combined percussion and time fuses and so on.
  • the combination with a projectile fuse having a movable detonator member, of a rotatable locking member adapted to prevent actuation of said detonator member, a reversible horological escapement controlling the rotation of said looking member to release the detonator member at a predetermined time after firing the projectile, and a spring-loaded bolt which normally prevents movement of said locking member from the locking position and is retracted against the action of its spring by the effect of inertia when the fuse is in flight, said bolt having a wedge-like portion engaging the locking member for blocking movement of the locking member and for imparting movement to the latter upon displacement of the wedge-like portion relative to said locking member whereby said locking member is restored to the locking position by said bolt when said bolt, after partial retraction, is restored to normal position by its spring.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
  • Vibration Dampers (AREA)
US237729A 1937-11-06 1938-10-29 Fuse for ordnance projectiles or bombs Expired - Lifetime US2421266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH510065X 1937-11-06

Publications (1)

Publication Number Publication Date
US2421266A true US2421266A (en) 1947-05-27

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ID=4517392

Family Applications (1)

Application Number Title Priority Date Filing Date
US237729A Expired - Lifetime US2421266A (en) 1937-11-06 1938-10-29 Fuse for ordnance projectiles or bombs

Country Status (7)

Country Link
US (1) US2421266A (de)
BE (1) BE430758A (de)
CH (1) CH199509A (de)
DE (1) DE675717C (de)
FR (1) FR844999A (de)
GB (1) GB510065A (de)
NL (1) NL49507C (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630068A (en) * 1947-11-25 1953-03-03 Allen S Clarke Arming device
US2798430A (en) * 1953-06-01 1957-07-09 David D Grimes Rocket grain braking apparatus
US3119337A (en) * 1958-08-12 1964-01-28 Przychowski Siegfried Duni Von Percussion fuze, particularly for unrifled shells, primarily hollowcharge shells
US3885500A (en) * 1973-10-05 1975-05-27 Valinor Anstalt Percussion igniter for projectiles and projectile embodying the same
CN103256872A (zh) * 2013-05-06 2013-08-21 沈阳理工大学 一种基于膨胀芯材灭火弹引信的触发机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1182488A (en) * 1915-06-09 1916-05-09 Reynold Janney Detonator.
GB125401A (en) * 1916-06-29 1919-04-24 Rudge Whitworth Ltd Improvements in and relating to Projectile Fuzes.
US1726325A (en) * 1927-07-19 1929-08-27 Varaud Andre Percussion fuse for projectiles
US2116820A (en) * 1936-09-11 1938-05-10 Birkigt Marc Percussion fuse

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1182488A (en) * 1915-06-09 1916-05-09 Reynold Janney Detonator.
GB125401A (en) * 1916-06-29 1919-04-24 Rudge Whitworth Ltd Improvements in and relating to Projectile Fuzes.
US1726325A (en) * 1927-07-19 1929-08-27 Varaud Andre Percussion fuse for projectiles
US2116820A (en) * 1936-09-11 1938-05-10 Birkigt Marc Percussion fuse

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2630068A (en) * 1947-11-25 1953-03-03 Allen S Clarke Arming device
US2798430A (en) * 1953-06-01 1957-07-09 David D Grimes Rocket grain braking apparatus
US3119337A (en) * 1958-08-12 1964-01-28 Przychowski Siegfried Duni Von Percussion fuze, particularly for unrifled shells, primarily hollowcharge shells
US3885500A (en) * 1973-10-05 1975-05-27 Valinor Anstalt Percussion igniter for projectiles and projectile embodying the same
CN103256872A (zh) * 2013-05-06 2013-08-21 沈阳理工大学 一种基于膨胀芯材灭火弹引信的触发机构
CN103256872B (zh) * 2013-05-06 2015-01-14 沈阳理工大学 一种基于膨胀芯材灭火弹引信的触发机构

Also Published As

Publication number Publication date
FR844999A (fr) 1939-08-07
NL49507C (de)
DE675717C (de) 1939-05-16
CH199509A (de) 1938-08-31
GB510065A (en) 1939-07-26
BE430758A (de)

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