US2984184A - Fuse for gyrating and non-gyrating projectiles - Google Patents

Fuse for gyrating and non-gyrating projectiles Download PDF

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Publication number
US2984184A
US2984184A US723221A US72322158A US2984184A US 2984184 A US2984184 A US 2984184A US 723221 A US723221 A US 723221A US 72322158 A US72322158 A US 72322158A US 2984184 A US2984184 A US 2984184A
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United States
Prior art keywords
firing
closing member
gyrating
primer
pin
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
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US723221A
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English (en)
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Cetre Jeanne Marie Louise
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Individual
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Individual
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Publication of US2984184A publication Critical patent/US2984184A/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
    • 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
    • F42C9/043—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 impact
    • 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

Definitions

  • the fuze which is the object of this invention, differs from known fuzes in that it comprises a security device and a locking device retaining, against the action of a spring, a closing member in a safety position, and in that after a specified period of operation, the firing safety device not only is no longer opposed to the firing of a primary primer upon an impact, but further causes the releasing of the security device and the actuation of the closing member by said spring until one of two positions in which the said closing member is no longer opposed to the transmission of the fire of the primary primer.
  • the annexed drawing shows diagrammatically and by way of example an embodiment of the fuze as well as varied embodiments of a blocking device for the lock of the clockwork escapement.
  • Fig. 1 is an axial sectional view, the elements of the fuze being in the safety position.
  • Fig. 2 is a partial sectional view, on a smaller scale, along line IIII of Fig. 1.
  • Fig. 3 is a partial sectional View on a small scale and along line IIIIII of Fig. 1, the firing safety device being in the safety position.
  • Fig. 4 is a plan view of the security device, its elements being in the safety position.
  • Fig. 5 is a plan view of the security device, its elements being in the position of delayed firing.
  • Fig. 6 is a plan view of the security device, its elements being in the position of instantaneous firing.
  • Fig. 7 is a partial sectional view along line VIIVII of Fig. 6.
  • Fig. 8 is a partial sectional view, on a large scale, of a variant of a device for blocking the lock of the clockwork escapement.
  • Fig. 9 is a sectional view of another variant of the device for blocking the lock of the clockwork escapement.
  • the fuze comprises a cap 1, in which is mounted a firing safety device actuated by a clockwork mechanism.
  • the said clockwork mechanism comprises a toothed member 2 sliding in a guide 3 and subjected to the action of a driving spring 4.
  • the set of teeth 5 of the said member 2 is connected by pinions e 2 and e to a toothed wheel e, which co-operates with a notch b of a balance-wheel b.
  • the said balancewheel is normally immobilized by a pin 6 sliding in a guide 7 and carried by an inertia mass 8 which may slide, under the action of a high acceleration to which the fuze may be subjected, in a housing 9 against the action of a return-spring 10.
  • the toothed member 2 is provided with an aperture 11 having the shape of a keyhole through which passes a striking pin 12 provided with a shoulder 13, the diameter of which is larger than the narrow part 14 of the States atent ree aperture 11, but smaller than the enlarged part 15 of the latter.
  • the end of the striking pin 12 fits into a bore 16 in the head 17 of a primer carrier 18 which may slide in a housing 19.
  • the head 17 of the primer carrier has a diameter substantially equal to that of the shoulder of the striking pin, so that the said head cannot engage in the narrow part 14 of the aperture 11, but may, on the other hand, penetrate into the enlarged part 15 of the latter.
  • the high acceleration to which the fuze is subjected causes a displacement of the inertia mass 8 against the action of its return-spring 10.
  • the pin 6 comes out of its guide 7 and then is held in a withdrawn position by the elasticity of its arms, which spread and prevent it from penetrating afresh into its guide, under the action of the return-spring 10.
  • the driving spring 4 actuates the toothed member 2 towards the right of Fig. 1, at a speed determined by the clockwork.mechanism. After a certain period of time, the said member 2 abuts the end wall 20 of its guide 3.
  • the said firing and trajectory safety device has been here described merely with a view to rendering more understandable the operation of the safety device, but it is to be understood that the said firing safety device could be replaced by any other known firing safety device.
  • the security device comprises a cylindrical support 22, provided with a delay cap 23 and a bore 24 for the instantaneous firing.
  • the said support 22 has a housing 25 in which is housed a plate 26 carrying a detonator 27.
  • the said plate carries an axle 28 rotating in bearings 29 and 30, provided in the support 22 and in a mounting plate 31 secured in a hollow 32 of the support 22.
  • the said axle 28 is subjected to the action of a spring 33 coaxial with the said axle and of which one end is engaged in a slot 34, made in the said axle, while its other end is engaged in a slot 35 (Fig. 4) made in the support 22.
  • a closing member 37 carried along in the angular displacements of'the axle 28.
  • the closing member is provided with a non-circular boring, engaged on a part 38 of the axle 28 which has a cross section of corresponding shape.
  • a blocking device holds, against the action of the spring 33, the security device in a position in which the detonator and the closing member 37 are each located in a safety position.
  • the said blocking device comprises a catch 39 carried by the closing member 37.
  • the said catch is provided with a conical end extending through an arcuate aperture 40 formed in the mounting plate 31. In the safety position of the device (position shown in Figs. 1 and 4), the catch 39 bears, under the action of the spring 33, on a conical orifice 41 disposed in the rear end of the primer carrier 18.
  • the toothed member 2 of the firing safety device When, after the firing of the projectile and after a period specified by the clockwork mechanism, the toothed member 2 of the firing safety device reaches its position determined by the wall 20 in which it no longer prevents a relative displacement between the primer carrier 18 and the striking pin 12, the thrust exerted by the spring 33 on Patented May 16, 1961 the closing member produces a sliding of the two conical surfaces 39 and 41 one with resp ct to the other, because the primer carrier 18 may now be moved upwards, its head being able to penetrate into the enlarged part 15 of the keyhole shaped aperture, made in the toothed member Thus, the said catch 39 escapes from the conical orifice 41 and the freed closing member is moved by the spring 33 in the direction of the arrow 1, The said closing member carries along the plate 26 in its movement, in order to bring, as described hereafter, the detonator 27 into one of its active positions and the closing member into one of the two positions in which it no longer resists the transmission of the fire of the primary primer 21
  • the cap 1 is provided with a control member 42 accessible from the exterior and which carries an abutment 43, movable between an active position (Figs. 1 and 7) determined by the edge 44 of a notch (Fig. 4) formed in the mounting plate 31 and a withdrawn position (shown in dash lines in Fig. 7) determined by the upper face of the said mounting plate 31.
  • the said abutment 43 When the said abutment 43 is in the active position (Figs. 1 and 7), it is located in the path of a stop face 45 carried by the closing member 37 so that the freed closing member displaces and comes to occupy the position shown in Fig. and in which the detonator 27 is located opposite the delay cap 23 while the closing member 37 uncovers the said delay cap.
  • the stop face 45 bears against the abutment 43
  • the rear edge 58 of the closure device uncovers the end 59 of the aperture 40, but the bore 24 remains covered by the said closing member.
  • the fire of the primer 21 passing through the end of the aperture 40 and between the mounting plate 31 and the bottom 61 of the hollow 36 may reach the delay cap 23, but cannot reach the bore 24.
  • the closing member 37 is moved by its spring 33 until the catch 39 abuts against the end 47 of the aperture 40 (Fig. 6) formed in the mounting plate. The latter is held against any angular movement by a tongue 48 engaged in a notch 49 made in the support 22.
  • the detonator 27 carried by the plate 26 which is angularly fixed with the closing member 37 is located opposite the bore 24 made in the support 22, whereas the closing member uncovers the said bore.
  • the firing of the primary primer 21' by the striking pin 12 induces directly, through the said bore 24, the firing of the detonator 27.
  • a simple plane closing member 37 which uncovers either a delay cap or the said delay primer and a bore, it is possible very readily to produce either the delayed firing or the instantaneous firing of the detonator.
  • the support 22 also comprises a recess 50*, situated above the detonator 27, located in the safety position (Fig.).
  • a recess 50* situated above the detonator 27, located in the safety position
  • the support 22 is held in position in a housing by means of a plug 52 which is provided, in its central part, with a blind bore '53.
  • a plug 52 which is provided, in its central part, with a blind bore '53.
  • the thin wall 54 forming the bottom of the said bore 53 is broken down by the pressure of the developed gases and the "explosive charge 60 is initiated.
  • the said wall 54 is 4 however of sufficient thickness to prevent any passage of gas towards the explosive charge 60 in the event of an ill-timed explosion of the said detonator 27 while the same is in the safety position.
  • the said wall 54 completely" separates the mechanical members mounted in the cap from the explosive charge, so that the movements of the said mechanical members cannot be hindered by dust emanatin from the explosive charge,- for example.
  • the fuze may also be provided with a locking device for the inertia mass 8 bringing about, upon the firing of the projectile, the operation of the said safety device.
  • the said locking device is constituted, according to a variant shown in Fig. 9, by a pin 55 rotating free in a bore 57 made in the cap 1 approximately tangentially to the housing 9 of the inertia mass 8..
  • the pin 55 is provided with a control member (not shown) accessible from the exterior and similar to the eo t'rorrnember 42.
  • I Fig. 8 shows another variant of the said locking device.
  • the inertia mass 8 is provided with a circular groove '63, into which may penetrate a finger 64, carried by a pin '67 rotating in a radial guide 62 and provided with a control member (not shown) accessible from the exterior.
  • the locking device of the security device may include a pin parallel to the axis of the fuie and of which the lower conical end would engage in a conical impression of the closing member, while its upper end would be in contact with the lower face of the toothed member 2
  • the release of the security device could be brought about when the toothed member 2 bears against the wall 20 through the penetration, under the action of the spring 33, of the upper end of the said pin in the narrow part 14 of the keyholeshaped aperture.
  • the firing safety device described couldbe replaced by any known device preventing the firing during a certain specified period after the firing of the projectile.
  • the said device could comprise a known clockwork mechanism, such as the one described with reference to the annexed drawing or any other known device.
  • the driving spring 4 may be loaded when the fuze is assembled as in the example described, or, on the contrary, be loaded upon firing of the projectile, by an inertia mass.
  • the plate 26 carrying the detonator 27 may be suppressed.
  • the security device then comprising only the closing member 37 subjected to the action of -the spring 33 and held in the safety position, that is to say of closure of the relay 23 and of the bore 24, 'bythe locking device the release of which is brought about by the movemeht of a member of the firing safet device.
  • a fu'z'e of g r-atihg and non'gyrating projectiles comprising a. cap,- a primer ear r ie'r coax'ially mounted with respect to said cap, a primer carried by said primer carrier, a firing pin coaxially mounted with respect to said primer carrier, said primer carrier and said firing pin being housed in said cap and both slidably mounted therein to enable said firing pin to engage said primer carrier and fire said primer located in said primer carrier, a shoulder provided on said firing pin, a locking member interposed between said shoulder and the front face of said primer carrier to prevent relative movement of said firing pin and said primer carrier against one another, a clockwork, a mechanical connection com prising pinions and gears connecting said clockwork to said locking member for shifting said locking member from an operative or safe position into an inoperative or fire position, whereby when in said fire position said locking member frees said firing pin and said primer carrier in order to enable them to move one against the other upon impact of the projectile,
  • a fuze for gyrating and nongyrating projectiles comprising a primary primer, a striking pin, abutment means carried by said striking pin, a locking member displaceable from a safe position to a fire position and interposed between said abutment means of said striking pin and said primary primer, a clockwork mechanical driving means connecting said clockwork to said locking member, an inertia mass, a pin mounted on said inertia mass, spring means maintaining said pin in locking position of said clockwork, firing of said primer freeing said clockwork by axial displacement of said inertia mass against the action of said spring means, said clockwork controlling the displacement of said locking member from said safe position to said fire position, a closing member, a locking device of said closing member means carried by said primary primer, the combination of an angularly displaceable shaft drivingly connected to said closing member, a spring acting on said shaft to cause its angular displacements, said closing member being maintained in a rest positionagainst said spring by said locking device
  • a fuze according to claim 1 in which a projection is carried by said closing member, said projection extending perpendicularly to said closing member, a conical portion located at the forward end of said projection, a conical recess for engaging said projection carried by the rear portion of said primer carrier, said projection and said conical recess abutting one against the other to define the rest position of said closing member when said locking member is in its safe position, said projection escaping said conical recess under the action of said spring when said locking member is in its fire position by lifting said primer carrier.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Air Bags (AREA)
US723221A 1957-03-28 1958-03-24 Fuse for gyrating and non-gyrating projectiles Expired - Lifetime US2984184A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH848767X 1957-03-28

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US2984184A true US2984184A (en) 1961-05-16

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US723221A Expired - Lifetime US2984184A (en) 1957-03-28 1958-03-24 Fuse for gyrating and non-gyrating projectiles

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US (1) US2984184A (fr)
BE (1) BE565799A (fr)
FR (1) FR1203588A (fr)
GB (1) GB848767A (fr)
LU (1) LU35886A1 (fr)
NL (2) NL226221A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125958A (en) * 1964-03-24 A foure
US3148621A (en) * 1958-06-14 1964-09-15 Industrial Holding Ets Projectile fuze
US3162126A (en) * 1958-01-23 1964-12-22 Messrs Gebruder Junghans Ag Percussion fuze for projectiles without rifling
US3367267A (en) * 1965-01-08 1968-02-06 Industrial Holding Ets Non-gyrating projectile fuse
US3387561A (en) * 1965-10-15 1968-06-11 Contraves Ag Actuator arrangement for a flying object
US3417701A (en) * 1966-10-28 1968-12-24 Zeebrugge Forges Sa Detonating fuse for bombs and the like
US3453892A (en) * 1966-04-15 1969-07-08 Avco Corp Spin time recorder
US4421031A (en) * 1981-05-01 1983-12-20 Pocal Industries, Inc. Percussion fuse for training projectiles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8322212V0 (it) * 1983-06-24 1983-06-24 Valsella Meccanotecnica Spa Avvenditore meccanico per mina comandato mediante dispositivo di inciampo.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1751616A (en) * 1925-03-02 1930-03-25 Secretary Of War Of The United Combination fuse
US1863888A (en) * 1929-01-30 1932-06-21 Varaud Andre Fuse for artillery projectiles
US2129692A (en) * 1937-10-01 1938-09-13 Edwin J Hottinger Fuse
US2183073A (en) * 1937-06-30 1939-12-12 Mifina S A Safety device for projectile fuses
US2511872A (en) * 1950-06-20 Electric fuse
US2664822A (en) * 1950-01-03 1954-01-05 Frank B Hale Fuze
US2821925A (en) * 1956-04-16 1958-02-04 Ufa Universal Finanzierungs Au Double-acting percussion fuze provided with a safety device for projectiles
US2825284A (en) * 1954-11-05 1958-03-04 Mefina Sa Impact fuzes with mechanical retardation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511872A (en) * 1950-06-20 Electric fuse
US1751616A (en) * 1925-03-02 1930-03-25 Secretary Of War Of The United Combination fuse
US1863888A (en) * 1929-01-30 1932-06-21 Varaud Andre Fuse for artillery projectiles
US2183073A (en) * 1937-06-30 1939-12-12 Mifina S A Safety device for projectile fuses
US2129692A (en) * 1937-10-01 1938-09-13 Edwin J Hottinger Fuse
US2664822A (en) * 1950-01-03 1954-01-05 Frank B Hale Fuze
US2825284A (en) * 1954-11-05 1958-03-04 Mefina Sa Impact fuzes with mechanical retardation
US2821925A (en) * 1956-04-16 1958-02-04 Ufa Universal Finanzierungs Au Double-acting percussion fuze provided with a safety device for projectiles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125958A (en) * 1964-03-24 A foure
US3162126A (en) * 1958-01-23 1964-12-22 Messrs Gebruder Junghans Ag Percussion fuze for projectiles without rifling
US3148621A (en) * 1958-06-14 1964-09-15 Industrial Holding Ets Projectile fuze
US3367267A (en) * 1965-01-08 1968-02-06 Industrial Holding Ets Non-gyrating projectile fuse
US3387561A (en) * 1965-10-15 1968-06-11 Contraves Ag Actuator arrangement for a flying object
US3453892A (en) * 1966-04-15 1969-07-08 Avco Corp Spin time recorder
US3417701A (en) * 1966-10-28 1968-12-24 Zeebrugge Forges Sa Detonating fuse for bombs and the like
US4421031A (en) * 1981-05-01 1983-12-20 Pocal Industries, Inc. Percussion fuse for training projectiles

Also Published As

Publication number Publication date
NL226221A (fr)
FR1203588A (fr) 1960-01-20
LU35886A1 (fr)
BE565799A (fr)
NL111165C (fr)
GB848767A (en) 1960-09-21

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