US3124074A - Inertially armed fuze - Google Patents

Inertially armed fuze Download PDF

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Publication number
US3124074A
US3124074A US3124074DA US3124074A US 3124074 A US3124074 A US 3124074A US 3124074D A US3124074D A US 3124074DA US 3124074 A US3124074 A US 3124074A
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United States
Prior art keywords
worm
fuze
safety
weight
pin
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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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English (en)
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Classifications

    • 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
    • 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
    • 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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/34—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by a blocking-member in the pyrotechnic or explosive train between primer and main charge
    • 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
    • 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
    • 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
    • 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
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F3/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork
    • G04F3/02—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms
    • G04F3/025—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms mechanically actuated

Definitions

  • the invention relates to time fuzes with sensitive percussion fuzing for projectiles, with and without rifiing. It is an object of the invention to equip such a fuze with safety devices which are reliable in transport and also as regards timing.
  • ri ⁇ he invention is characterised by a cylindrical worm which is rotatably mounted on the striker pin and which is driven by an inertia weight which is non-rotatably guided in the fuze housing and is procided with transverse pins engaging in the worm groove, the said inertia weight carrying an axially parallel locking member which secures the balance-type regulator of a timing mechanism.
  • a toothed wheel is arranged on the cylindrical worm so as to rotate therewith, the said Wheel driving a balance or escapement wheel which co-operates with a rocking pallet which is mounted at the forward end of the Worm.
  • a known rocker plate which closes the striker pin passage can be mounted behind the worm, the said rocker plate being held against the action of its torsion spring in the safe closed position by a stop pin, which bears externally against the hollow end of the worm, the wall of the hollow end also being formed with a recess for the passage of the stop pin on the rocker plate in the rear dead-centre position of the inertia weight when the worm has completed its rotation.
  • FIG. l is a longitudinal section of the fuze, including its housing
  • FIG. 2 is a longitudinal section of the timing mechanism and of the safety time mechanism, shown to a larger scale as compared with FIG. l;
  • FiG. 3 is a sectional View on the line 2?*3 of FIG. 2;
  • FIG. 4 is a sectional View on the line d--l of FIG. 2;
  • FIG. 5 is a sectional view on the line 5-5 of FlG. 2 with the blocking plate of the striker pin passage in the safe position;
  • P lG. 6 is a section corresponding to FIG. 5, but with the blocking plate of the striker pin passage in the end safe position.
  • time safety mechanism which adjoins the bottom plate 58 of the timing mechanism (FIG. 2).
  • the reference 10i) represents the top plate of the time-safety mechanism, lill is an intermediate plate, im is a cover plate, while li3 is an additional intermediate plate and hifi is the bottom plate.
  • the cylindrical worm member 167 Rotatably mounted between the plates itil and liiZ is the cylindrical worm member 167; it comprises a worm thread lit'a which has a steep pitch and which is engaged by a pin 163 xed radially in an inertia weight 169. The latter is guided axially on the posts 165 and 196 (FIGS. 2 and 4).
  • the toothed wheel llt) is rotatably mounted near the forward end of the worn element 1%7 and it meshes, as shown in FlG. l, with the pinion lll of an escapement wheel 112 which cooperates with the rocking pallet H3, which is pivotally mounted on the striker pin stem 15b as a pivot.
  • the coiled sprin.Q il@ is fitted with pretension between the inertia weight 169 and the cover plate 162. Fitted into the Weight it?? parallel to the fuze axis is the locking iinger Elfi, which extends through suitable holes in the plates itil, Mtl, 53, 57, S6, 55, S4, 53 and 52 and has the object to secure the balance -type regulator 68 of the timing mechanism until the predetermined time-safety travel has been completed and above all also to make it safe against the action of shocks during transport.
  • the forward end of the safety finger 114 is reduced at 114m to a smaller diameter, as shown in FIG.
  • timing mechanism 6d is to provide for a balance regulation and it operates in such a way that the regulator 63 is locked until ring takes place by a locking projection projecting into its range of oscillation, as shown immediately to the right of the element 68.
  • the stern of the safety nger lld is made sufiiciently long, as is also the length of travel for the inertia weight N19 and the timing for the delay mechanism (li'a/ 1%/ 10/ ill/ ilZ/ M3), that with brief shocks during transport, the reduced part lien of the safety finger le still does not come into the range of the locking spring 11S, but in fact the inertia weight and with it the safety finger its again return to the initial locking position after the shock has subsided.
  • the balance mechanism of the timing mechanism thus remains locked, so that the said mechcannot be started as a result of a shock during transport.
  • the safety arrangement still to be described for the blocking plate on the worm member MP7 for the needle passage is so arranged that it is still not released by a brief rotation of the worm member 197 caused by a shock during transport.
  • the time-safety mechanism is in other words adapted to the ballistic property of the rocket projectile, that is to say, to the low tiring pressure and to the fact that the maximum acceleration is only reached after about 0.5 to 0.8 second.
  • the arming of the timing mechanism must take place in a reliable manner, but on the other hand the fuze must be safe during transport and on firing.
  • the running period of the time-safety mechanism is arranged accordingly.
  • the cylindrical worm member N7 completes approximately three quarters of a revolution from the starting position at the front to the end position, which is the armed position.
  • the cylindrical Worm element ltl is reduced at its rear end at itl'b to a smaller diameter and is guided with the said extension piece in the cover plate 192, which simultaneously serves as an axial bearing therefor.
  • the worm element 137 is drilled axially at liV/c, so that a collar ii'b is formed, which is cut away at 19T/d, as shown in FGS. 2, 5 and 6, so that a safety pin 116, which is arranged on the blocking plate 117 for the needle passage and bears during the safe period against the collar M5715 (FlG. 5) but is allowed to pass during the safe period (FlG.
  • a compression spring 119 is fitted with suitable pretension in the hollow shaft 16 of the spring barrel, the said spring 119 engaging on the rear face of the enlargement 15a of the striker pin.
  • the striker pin 15 will certainly be driven inwardly by the plate 16 with destruction of the diaphragm 17; the pointed end of the said pin, however, strikes against the blocking plate 117 for the striker pin passage, the said plate being in the safe position (FIG. 5). Since the forces of inertia operative in this case are unidirectional with the force of the thrust spring 119 behind the inertia weight 169, no movement of these parts occurs in practice.
  • the maximum acceleration with rocket projectiles is only reached after about 0.5 to 0.8 second; this slow increase in speed is thus fundamentally different from the sudden acceleration impulse of an impact due to dropping.
  • the inertia Weight is only moved back a comparatively short distance and is then brought again by the spring 119 into its forward position (FIGS. 1 and 2).
  • the delay mechanism 116, 111, 112, 113 is adjusted for forward and rearward movement.
  • the stem 114 of the safety finger is held in the inertia weight 109 for the timing escapement 63 until the return movement of the weight 109 into an intermediate position can still not lead to the locking of the finger 114 on the hairpin spring 11S, that is to say, for releasing the balance member 68.
  • all functional parts of the fuze are again in the initial position and all safety devices are fully operative again.
  • the inertia weight 109 On tiring, the inertia weight 109 is forced rearwardly during the acceleration period and, since it is guided rectilinearly on the posts 105 and 106, the engagement of its pin 168 in the worm 10751 causes a rotation of the worm member 107, which is slowed down by the time of the delay mechanism 110, 111, 112, 113. The rearward movement of the inertia weight 109 is also counteracted by the thrust spring 119. The time-safety mechanism is so adjusted that the bottom surface of the inertia weight 169 has reached the intermediate plate 102 at the end of the l predetermined safety travel.
  • the reduced end 11de: of the safety iinger 114 is also at the height of the hairpin locking spring 115, so that the arms thereof close around 114e and it prevents the safety linger 114, and with it the inertia weight 109, from moving forward again under the action of the thrust spring 109 after the rearward pressure has ceased.
  • the blocking plate 117 for the needle passage now no longer forms an obstacle for the striker pin 15b, since with the rearward travel of the inertia weight 199, the collar 1.37! arranged on the rear end of the cylindrical worm element 107 has been rotated to such an extent that its cut-away part 1G75! (FIGS. 5 and 6) can now move past the lockingpin 116 on the locking plate 117, which formerly had rested laterally on the collar 167i: (see FIG. 6), so that the passage for the striker pin 15b is freed.
  • the collar 10711 is also of such dimensions in the peripheral direction that the pin 116 is still not freed in intermediate positions of the worm and of the inertia weight.
  • Time fuze with sensitive fuzing for projectiles with and without riding comprising a striker pin, a cylindrical worm with a spiral groove therein rotatably mounted on the striker pin, an inertia weight provided around the worm to drive the latter, a transverse pin in the weight projecting into and engaging in the groove in the worm, a timing mechanism having a balance regulator mounted in the fuze, means to prevent rotation of the weight, and a safety finger engaging the balance regulator and mounted on the weight parallel to a longitudinal axis of the fuze to secure the balance regulator of the timing mechanism.
  • Time fuze according to claim 1 in which a toothed wheel is provided secured on the cylindrical worm to rotate therewith and in which a pinion and a rocking pallet are provided with the pinion mounted at the forward end of the worm and in cooperative meshing engagement with the toothed wheel to operate the pallet.
  • Time fuze according to claim 1 in which a rocker plate is provided pivotally mounted in a transverse plane in the fuze to one side of the striker pin for shutting oif a passage Jfor the striker pin and is mounted beneath the Worm and the striker pin to serve as an additional safety device and in which a torsion spring and stop pin are provided mounted on the rocker plate, said plate being held against the torsion spring in a safety closed position by the stop pin which bears externally against a hollow end ot the worm, and a wall of the hollow end being formed with a recess therein for the passage of the stop pin on the rocker plate upon completion of the rotation of the worm in the rear dead-centre position of the inertia weight.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gear Transmission (AREA)
  • Braking Arrangements (AREA)
  • Toys (AREA)
  • Air Bags (AREA)
US3124074D 1959-10-16 Inertially armed fuze Expired - Lifetime US3124074A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI17119A DE1114124B (de) 1959-10-16 1959-10-16 Zeitzuender

Publications (1)

Publication Number Publication Date
US3124074A true US3124074A (en) 1964-03-10

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ID=7186048

Family Applications (1)

Application Number Title Priority Date Filing Date
US3124074D Expired - Lifetime US3124074A (en) 1959-10-16 Inertially armed fuze

Country Status (5)

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US (1) US3124074A (de)
CH (1) CH368397A (de)
DE (1) DE1114124B (de)
GB (2) GB935764A (de)
NL (4) NL256829A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495533A (en) * 1966-10-17 1970-02-17 Messrs Gebruder Junghans Gmbh Safety device for time fuzes
US3618528A (en) * 1969-05-10 1971-11-09 Junghans Gmbh Geb Safety arrangement for fuses for nonspinning projectiles, more particularly rocket projectiles
US11512938B1 (en) * 2021-06-03 2022-11-29 Aura Technologies, Llc Centrifugal fuze assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115628652B (zh) * 2022-12-23 2023-02-28 山西北方机械制造有限责任公司 一种基于电驱动的双向切换式引信安保机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US969497A (en) * 1909-04-19 1910-09-06 Eugene Schneider Fuse for explosive projectiles.
US2149470A (en) * 1935-09-25 1939-03-07 Edgar Brandt Mechanical time fuse
US2164115A (en) * 1935-02-11 1939-06-27 Rech S Etudes Applic Tech R E Time fuse for projectiles
GB637152A (en) * 1941-06-20 1950-05-17 Fernand Delay Improvements in and relating to mechanical time fuzes for projectiles
US2850979A (en) * 1954-04-19 1958-09-09 Magnavox Co Time delay control means
US2895419A (en) * 1954-06-08 1959-07-21 Rosselet Jean Safety arming mechanism for fuses

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE479139C (de) * 1923-08-02 1929-07-15 Tavannes Watch Co Sa Gestell fuer das Uhrwerk von mechanischen Zeitzuendern fuer Artilleriegeschosse
CH243619A (fr) * 1943-02-19 1946-07-31 Delay Fernand Déclencheur à temps, à mouvement d'horlogerie à ressort moteur.
US2763213A (en) * 1952-01-22 1956-09-18 Rueger Herman Fuse
CH322297A (it) * 1952-10-25 1957-06-15 Borletti Spa Spoletta per proiettili, particolarmente per tiro antiaereo

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US969497A (en) * 1909-04-19 1910-09-06 Eugene Schneider Fuse for explosive projectiles.
US2164115A (en) * 1935-02-11 1939-06-27 Rech S Etudes Applic Tech R E Time fuse for projectiles
US2149470A (en) * 1935-09-25 1939-03-07 Edgar Brandt Mechanical time fuse
GB637152A (en) * 1941-06-20 1950-05-17 Fernand Delay Improvements in and relating to mechanical time fuzes for projectiles
US2850979A (en) * 1954-04-19 1958-09-09 Magnavox Co Time delay control means
US2895419A (en) * 1954-06-08 1959-07-21 Rosselet Jean Safety arming mechanism for fuses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495533A (en) * 1966-10-17 1970-02-17 Messrs Gebruder Junghans Gmbh Safety device for time fuzes
US3618528A (en) * 1969-05-10 1971-11-09 Junghans Gmbh Geb Safety arrangement for fuses for nonspinning projectiles, more particularly rocket projectiles
US11512938B1 (en) * 2021-06-03 2022-11-29 Aura Technologies, Llc Centrifugal fuze assembly
US20220390218A1 (en) * 2021-06-03 2022-12-08 Aura Technologies, Llc Centrifugal fuze assembly

Also Published As

Publication number Publication date
NL256830A (de)
NL127197C (de)
NL256829A (de)
NL125214C (de)
GB935764A (en) 1963-09-04
CH1091560A4 (de) 1962-10-15
CH368397A (de) 1963-05-15
DE1114124B (de) 1961-09-21
GB935765A (en) 1963-09-04

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