US3495533A - Safety device for time fuzes - Google Patents

Safety device for time fuzes Download PDF

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Publication number
US3495533A
US3495533A US675923A US3495533DA US3495533A US 3495533 A US3495533 A US 3495533A US 675923 A US675923 A US 675923A US 3495533D A US3495533D A US 3495533DA US 3495533 A US3495533 A US 3495533A
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United States
Prior art keywords
fuze
inertia weight
safety
weight
time
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
US675923A
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English (en)
Inventor
Josef Muller
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.)
MESSRS Gebr JUNGHANS GmbH
Original Assignee
MESSRS Gebr JUNGHANS GMBH
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
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Publication of US3495533A publication Critical patent/US3495533A/en
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    • 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
    • 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

Definitions

  • a time fuze for a projectile having a safety device including an inertia weight mounted around a cylindrical member which carries a striker pin stem movable therein and a second inertia weight is associated with the first inertia weight so that together they increase the safety factor for the fuze.
  • the invention relates to a further development of the time safety device for a time and percussion fuze for projectiles with low acceleration, with and without twist, especially for rocket projectiles according to Patent No. 3,124,074.
  • a cylindrical body provided at its periphery with a helical groove on the pin bolt, can be driven through an inertia weight provided with a cross bolt meshing with the helical groove, which is guided nonrotatably in the fuze housing and carries a safety finger parallel to the axis, which secures the balance-speed regulator of the time mechanism.
  • Fuzes according to the type pertinent here, as well as the fuze according to Patent No. 3,124,074 are customarily secured during transport by means of a safety pin. It can happen that, after the pin has already been drawn, the projectile will still be transported once more or further. If in that case, it will drop hard onto the shell base, the fuze which, according to supposition, is intended for projectiles with low acceleration and, therefore, for fuzes that can start easily, may become armed. It is the object of the present invention to prevent this latter.
  • the second inertia weight has been developed as a ring movable with regard to the feed springs and encompassing the first weight, having the same center.
  • it is inserted into a cylindrical bore of the central member of the fuze, and in its rest position, it partially encompasses the likewise cylindrical body of the drive atent mechanism built up on supporting columns above the base of the fuze.
  • double levers which can swing out radially on the base of the drive mechanism, will be arranged advantageously, which has on one arm a bend which is directed forward with an abutting surface cooperating with the inside edge of the lower front surface of the second inertia weight and which has on the other arm a supporting plate running perpendicular in relation to the axis of the fuze, which in a blocking position are located below the supporting fingers which project from the rear front surface of the first inertia weight and which release bores in the base of the fuze in their releasing position into which the supporting fingers submerge.
  • FIGURE 1 is a longitudinal section of a portion of the projectile taken on line .A-B of FIG. 2 in the direction of the arrows and showing the safety mechanism in the safety position,
  • FIGURE 2 is a cross section taken on line A-B of FIG. 1 in the direction of the arrows,
  • FIGURE 3 is a longitudinal section of a portion of the projectile of FIGS. 1 and 2 taken on line C-D of FIG. 4 in the direction of the arrows and taken in a position of the projectile turned approximately relative to FIG. 1 and showing the safety mechanism still in safety position,
  • FIGURE 4 is a cross section taken on line C-D of FIG. 3 in the direction of the arrows,
  • FIGURE 5 is a cross section similar to FIG. 1 with the parts in the same position but completely at nonsafety position and taken on line E-F of FIG. 6 in the direction of the arrows,
  • FIGURE 6 is a cross section taken on line E-F of FIG. 5 in the direction of the arrows, and
  • FIGURE 7 is a section of a detail taken on line G-H of FIG. 6 in the direction of the arrows.
  • the striker pin stem 15b is shown with the same reference character in US. Patent No. 3,124,074 and the cylindrical member 107 is mounted thereon.
  • This latter has a spiral groove 107a in its periphery in which a lateral pin 108 projects which is secured in an intertia weight 109.
  • This latter is axially slidable on the mechanism carrier posts and 106 and therefore is guided in a non-rotary manner and they carry in axial parallel relationship the safety finger 114 to provide a sure means to connect with the balance wheel regulator of the time mechanism.
  • the intertia weight 109 Upon firing during the acceleration of the projectile, the intertia weight 109 will slide to the rear and since it is positively guided on the posts 105 and 106, its lateral pin 108 by its projection in the spiral groove 107a will induce a rotation of the member 107, which by means of the delay mechanism 110, 111, 112 and 113 will be braked. The return movement of the inertia weight 109 will operate against the supporting spring 119.
  • the time safety mechanism is so adjusted that at the end of the definite time safety period of the inertia weight 109 with its back surface, the intermediate plate 102 has been reached. In his position the balance regulator will be freed by the forward end of the safety finger 114.
  • the second inertia weight 209 is in the form of a surrounding cylinder around the inertia weight 109 and urged and movable by spring 210 in the chamber 211a of the fuze portion 211. In its safety position it encloses partly the likewise cylindrical mechanism L on the supporting posts 105 and 106 over the fuze socket.
  • a pin bolt channel in the blocking plate 117 is on the fuze bottom plate 212 similar to US. Patent No. 3,124,- 074 and having a plate group 102, 103 and 104 mounted around the post 213 having a swing lever 214, 214a and 214b mounted thereon which may swing radially outwardly.
  • FIGURES 3, 6 and 7 On its arms 214a, FIGURES 3, 6 and 7, these lever arms 214a are directed forwardly with head portions 214a which are for the purpose of operating together with the inner edge 209a of the lower head surface of the inertia weight 209 in such a way that upon the return movement of the intertia weight 209, FIG- URES 3, 5 and 7, the intertia weight 209 will swing over the forward end slanting surfaces 214 of the double lever 214 around its rotation pin 213, FIGURE 6, in clockwise direction.
  • Time-safety device for a time and percussion double fuze for projectiles with low acceleration, with and without twist, especially for rocket porjectiles comprising a fuze housing, a drive mechanism, a cylindrical body provided on its periphery with a helical groove, a pin bolt on which the body is rotatably mounted, an inertia weight connected to drive the body on the pin bolt, a cross bolt in the weight meshing with the helical groove, a timing mechanism having a balance regulator means to provide non-rotational linear movement of the inertia weight in the fuze housing, a second intertia weight mounted in the fuze housing and which is movable in the same direction as the first-mentioned inertia weight and connected in series with the first-mentioned inertia weight, a disconnectable lock for the first-mentioned inertia weight so that at the end of its return path the disconnectable lock Will block the first-mentioned inert

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Toys (AREA)
US675923A 1966-10-17 1967-10-17 Safety device for time fuzes Expired - Lifetime US3495533A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1578483A DE1578483C3 (de) 1966-10-17 1966-10-17 Zeitsicherung eines Zeit- und Aufschlagzünders

Publications (1)

Publication Number Publication Date
US3495533A true US3495533A (en) 1970-02-17

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Application Number Title Priority Date Filing Date
US675923A Expired - Lifetime US3495533A (en) 1966-10-17 1967-10-17 Safety device for time fuzes

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US (1) US3495533A (de)
CH (2) CH1433867A4 (de)
DE (1) DE1578483C3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618528A (en) * 1969-05-10 1971-11-09 Junghans Gmbh Geb Safety arrangement for fuses for nonspinning projectiles, more particularly rocket projectiles
US3706282A (en) * 1970-01-21 1972-12-19 Us Air Force Abort mechanism
US4699057A (en) * 1986-03-24 1987-10-13 Esperanza Y Cia., S.A. Mortar shell time fuse

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1250350A (fr) * 1960-03-09 1961-01-06 Nederlanden Staat Dispositif de verrouillage pour la fusée d'un obus, ou analogue
US3124074A (en) * 1959-10-16 1964-03-10 Inertially armed fuze
US3375786A (en) * 1965-10-25 1968-04-02 Bombrini Parodi Delfino S P A Mechanical percussion fuze for rockets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124074A (en) * 1959-10-16 1964-03-10 Inertially armed fuze
FR1250350A (fr) * 1960-03-09 1961-01-06 Nederlanden Staat Dispositif de verrouillage pour la fusée d'un obus, ou analogue
US3375786A (en) * 1965-10-25 1968-04-02 Bombrini Parodi Delfino S P A Mechanical percussion fuze for rockets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618528A (en) * 1969-05-10 1971-11-09 Junghans Gmbh Geb Safety arrangement for fuses for nonspinning projectiles, more particularly rocket projectiles
US3706282A (en) * 1970-01-21 1972-12-19 Us Air Force Abort mechanism
US4699057A (en) * 1986-03-24 1987-10-13 Esperanza Y Cia., S.A. Mortar shell time fuse

Also Published As

Publication number Publication date
CH508864A (de) 1971-02-15
DE1578483A1 (de) 1970-12-23
CH1433867A4 (de) 1971-02-15
DE1578483C3 (de) 1978-08-17
DE1578483B2 (de) 1977-12-15

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