US3712231A - Safety-percussion cap responsive to rotation - Google Patents

Safety-percussion cap responsive to rotation Download PDF

Info

Publication number
US3712231A
US3712231A US00084594A US3712231DA US3712231A US 3712231 A US3712231 A US 3712231A US 00084594 A US00084594 A US 00084594A US 3712231D A US3712231D A US 3712231DA US 3712231 A US3712231 A US 3712231A
Authority
US
United States
Prior art keywords
rotor
locking
pin
safety
percussion cap
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
US00084594A
Other languages
English (en)
Inventor
L Petzsch
H Harnau
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall 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
Publication date
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3712231A publication Critical patent/US3712231A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F42C15/20—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

Definitions

  • the 28,1970 comprises a rotor capable of being set up in firing position and including locking means movable by cenpp 84,594 trifugal force and capable of being put out of engagement with the rotor.
  • Bearing plates carry the rotor.
  • the locking means include swingably locking bolts F l P t [30] orelgn App canon y Data disposed on both sides of the rotor.
  • the locking bolts Nov. 6, 1969 Germany ..P 19 55 812.4 engage the bearing plates.
  • the locking bolts have a locking pin and a holding pin and are disposed each [52] US. Cl ..l02/79, 102/83 parallel to the axis of the rotor and operatively engage [51] Int. Cl.
  • ..F42c 15/22 the rotor. They have additionally a spring including a [58] Field of Search ..l02/79, 80, '76, 83 worm toothing, and a spring causes the set up of the rotor.
  • the present invention relates to a safety-percussion cap which is responsive to rotation and which comprises a rotor set up in firing position, which rotor is retained in a safety position by means controlled by centrifugal forces.
  • the safety-percussion cap comprises a rotor capable of being set up into the firing position.
  • This rotor is retained in safety position such, that it has a supporting face disposed cross-wise to the fuse axis, which supporting face is provided as engagement for movable locking bodies of a locking device, capable of being brought out of engagement with the rotor.
  • the locking bodies themselves are equipped with movable releasing members securing the locking bodies against displacement in the transporting position for the release of the rotor locking, which releasing members, as well as the locking bodies, respond only upon effecting the centrifugal force successively and, thereby, free the rotor for setting up which is joined merely by friction.
  • the center of gravity is chosen such, that it obtains a setting movement, whereby it assumes the firing position automatically and spontaneously upon release by the locking bodies and the releasing members. Substantially each of the known rotors is equipped with this setting movement.
  • each locking bolt is equipped with a passing through swinging axle, swingably guided between bearing supports, the swinging point of the locking bolt being chosen such, that the locking bolt obtains a closing moment by displacement of the center of gravity into the vicinity of the rotation axis during the firing-and accelerationphase, which moment is supported in addition by a blade spring effecting from the outside the locking bolt.
  • Both the locking-and holding-pins are disposed opposite each other relative to the rotor shaft, which is formed as a hollow shaft and enter recesses of this shaft and thereby enter the rotor.
  • a particular safety of the locking bolt results by the fact, that the locking-pin opposite the center of rotation is retained by means of the locking bolt on both sides extending by a weak blade spring, whereby the parts of the locking-pin entering into the recess are subjected to a locking preventing the swinging out of the locking bolt by engagement with the bearing plate.
  • the safety-percussion cap contains otherwise effective from the outside with retardation for upsetting the rotor.
  • the device comprises a spiral or helical spring, the spring force of which is produced by winding over a worm shaft and a worm pinion drives a worm wheel rim sitting on the rotor.
  • the helical spring is thereby secured on the inside at one end of the worm shaft, while the other end, accessible from the outside in the open bore of a bearing disc is equipped with a slot for winding the helical spring.
  • the parts consisting of rotor, lock, set up spring and retarding device are combined in a structural group closed by itself, which group is equipped with connections for insertion in mechanical or electrical head or bottom-fuses of twist-stabilized bullets and rockets.
  • FIG. 1 is a longitudinal section of a safety-percussion cap with secured rotor designed in accordance with the present invention, along the lines l-l of FlG. 4;
  • FIG. 2 is a longitudinal section of the safety-percussion cap with secured rotor and partly an elevation along the lines llIl of FIG. I;
  • FIG. 2a is a longitudinal section of a fragmentary showing of the safety-percussion cap along the ,lines lla-lla of FIG. 2;
  • FIG. 3 is a longitudinal section with upright rotor in firing position along the lines lll-lll of FIG. 1;
  • FIG. 4 is a top plan view of the safety-percussion cap upon removal of the fuse part receiving the percussion cap.
  • the device designed in accordance with the present invention comprises a cylindrical housing open at the bottom and at the top and receiving a bottom part 2, which serves the reception of two upright and parallelly disposed bearing plates 3.
  • the latter are releasably connected together in turn by means of distancing bushings 4 and screws 5 exactly to the distance.
  • the bearing plates 3 are equipped with covered bores 6, in which the two short rotor shafts 8 carrying the rotor 7 are easily rotatably mounted.
  • the latter are formed as hollow shafts, and annular end faces of which extending flush with the outer face of the bearing plates 3, have two recesses 9 and 10 disposed diametrically relative to each other, of which the recess 9 is about double in width than the recess 10.
  • a passing through bore passes the rotor 7, which bore is filled up with one or a plurality of primers 11.
  • the worm shaft 14 carrying the worm pinion 13 extends parallel to the axis of the fuse and sits with its one end in the open core of a bearing disc connecting the two bearing plates 3.
  • the worm shaft 14 is equipped with a slot 16, which is accessible by means of a key or a screw driver through the bore of the bearing disc 15.
  • the other end of the worm shaft 14 disposed opposite the slot 16, is connected with the inner end of a helical spring 17, the outer end of which is secured to the inner wall of the cage 18.
  • the spring force of the helical spring 17 serves as driving source for the rotor 7, it must be wound by rotating the worm shaft 14, until it forms a compact spring package engaging tightly the worm shaft 14.
  • a radial pin 19 projects on the jacket face of the rotor, which abuts upon upsetting the rotor 7 on an abutment pin 20 and thereby fixes the firing position of the rotor 7.
  • a locking bolt 21 with a passing through axis 22 between bearing supports 23.
  • the swinging point 22, coinciding with the axis 22, is disposed in the neighborhood of the bottom part 2 and remote from the baring plate 3, whereby the locking bolt 21 has a center of gravity S in the vicinity of the rotating axis, whereby the locking bolt obtains a closing moment during the firing and accelerationphase, which moment is still effectively supported by a blade spring 24 effective from the outside.
  • the locking bolt 21 are inserted parallel to the rotor are each a locking-pin 25 and a holding-pin 26, whereby the locking'pin 25 disposed remote from the center of gravity S projects from both sides of the locking bolt 21, is retained from the outside by means of a weak blade spring 27 and on the inside enters into the broad recess 9 of the rotor shaft 8.
  • the thin holding-pin 26 sits in a blind bore of the locking bolt 21 and enters the small recess 10 of the rotor shaft 8.
  • Both blade springs 24 and 27 are retained with their vertical arms by a filling member 34, which supports itself, on the one hand, by the blade springs 24 and 27 against the cylindrical inner wall of the housing 1 and, on the other hand, against the bearing support 23.
  • the housing 1 surrounding the entire inner device of the safety-percussion cap is a structural part closed in itself and equipped with connections 28 and 30, of which the connection 28 carries the housing 29, which contains the means releasing the firing and transmitting, respectively.
  • These means can be in case of a mechanical fuse the striker and in case of an electric fuse a ram-like pin 31, which is put under tension by a current source against the central contact 11a embedded in the primer 11.
  • connection 30 receives the axial percussion cap housing 32 with the percussion cap 33. which is in direct connection with the percussion charge.
  • the safety-percussion cap operates during the transport in case of mechanical stresses, which take place in case of a lateral jolt cross-wise to the shell axis, so that at a maximum a locking-pin 25 emerges against the slight pressure of the blade spring 27 from the recess 9.
  • the oppositely disposed locking-pin 25 is pushed in by the latter, however, still more than until now into a recess 9.
  • the locking bolt 21 would receive an opening moment if the shell falls down on the floor with its point, by the arrangement of the center of gravity S and the swinging point 22.
  • the swinging out of the locking bolt 21 is, however, prevented such, that the inwardly projecting locking-pins are retained by the edges of the bearing plates 3.
  • the release of the rotor 7 is a presumption for the fact, that the wound helical spring 17 can now he released, whereby it drives by means of the worm shaft 14 and the worm pinion 13, the worm wheel rim 12 sitting on the rotor 7 so far, until the radial pin 19 engages the abutment pin 20.
  • the position shown in FIG. 3 is assumed by the rotor 7 in view of the retarding effeet by the holding-pin 26 and the worm drive only, after the shell has safely left the muzzle with a few meters distance.
  • the contact pin 31 is pressed towards the central contact 11a of the primer 11, that means, it is now connected with the fusion circuit electrically conducting.
  • the electrical energy is switched to the primer 11 such, that it is ignited and thereby, the ignition of the percussion cap 33 is started.
  • a striker replaces the electric contact pin 31, which is joined upon arrival of the shell by a ram 35 rushing forwardly in the housing 29 and impinges thereby the primer ll projecting up to the periphery of the rotor housing 7, which primer 11 starts in turn the ignition of the percussion cap 33.
  • a safety-percussion cap responsive to rotation comprising a rotor means capable of being moved to a firing position, locking means for locking said rotor and movable by centrifugal force and capable of being moved out of locking engagement with said rotor, bearing plates carrying said rotor, said locking means including pivotally mounted locking bolt means disposed on both sides, respectively, of said rotor and mounted for pivoting caused by centrifugal force, said locking bolt means engaging said bearing plates, said locking bolt means having a locking pin and a holding pin disposed therein each parallel to the axis of said rotor and operatively releasably locking said rotor against rotation, said locking pin and said holding pin disposed relative to the pivotal mounting of said locking bolt means such that said locking pin and said holding pin become operative to release said rotor for rotating, one after the other, and a worm gear operatively connected to said rotor, and a spring means operatively connected to said worm gear for turning the latter when said pins release said rotor.
  • each of said locking bolt means is pivotally guided with an axle passing therethrough and between bearing supports, and the center of gravity being chosen such, that said locking bolt means are equipped with a closing moment by displacement of said center of gravity into the vicinity of the axis of rotation of said locking bolt means during firing and acceleration phase.
  • the safety-percussion cap as set forth in claim 2, which includes a blade spring means engaging from the outside and effecting said locking bolt means for supporting the closing moment of said locking bolt means. 4.
  • said rotor includes a rotor shaft comprising a hollow shaft having diametrically oppositely disposed recesses, and said locking-pins and said holding-pins being operatively received in said recesses.
  • which includes said spring means comprises a tensioned helical spring
  • a worm shaft having thereon a worm pinion
  • said worm gear comprises a worm wheel rim on said rotor and driven by said worm pinion,
  • a radial pin projecting from said rotor adapted to en gage said abutment pin upon turning of said rotor, in order to fix the firing position by a stroke movement of said radial pin relative to said immovable abutment pin.
  • said worm shaft has a slot
  • said bearing plate having an open bore

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Toys (AREA)
US00084594A 1969-11-06 1970-10-28 Safety-percussion cap responsive to rotation Expired - Lifetime US3712231A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691955812 DE1955812A1 (de) 1969-11-06 1969-11-06 Rotationsabhaengige Sprengkapselsicherung

Publications (1)

Publication Number Publication Date
US3712231A true US3712231A (en) 1973-01-23

Family

ID=5750282

Family Applications (1)

Application Number Title Priority Date Filing Date
US00084594A Expired - Lifetime US3712231A (en) 1969-11-06 1970-10-28 Safety-percussion cap responsive to rotation

Country Status (5)

Country Link
US (1) US3712231A (fr)
BE (1) BE758555A (fr)
DE (1) DE1955812A1 (fr)
FR (1) FR2069072A5 (fr)
GB (1) GB1334054A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982487A (en) * 1973-06-14 1976-09-28 S.A. Prb. Societe Anonyme Micro-delayed detonator for ballistic rockets and rockets thus equipped

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3224749A1 (de) * 1982-07-02 1984-01-05 Gebrüder Junghans GmbH, 7230 Schramberg Zuender mit einem sicherungsrotor
ES293155Y (es) * 1986-03-24 1987-10-16 Esperanza Y Cia, S.A. Espoleta de retardo para granada de mortero.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2546999A (en) * 1942-07-01 1951-04-03 Raymond L Graumann Fuse
US2748707A (en) * 1945-06-23 1956-06-05 Raymond L Graumann Auxiliary detonator fuze for antiaircraft projectile
US2789507A (en) * 1952-06-14 1957-04-23 Mach Tool Works Oerlikon Fuze for rocket projectiles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2546999A (en) * 1942-07-01 1951-04-03 Raymond L Graumann Fuse
US2748707A (en) * 1945-06-23 1956-06-05 Raymond L Graumann Auxiliary detonator fuze for antiaircraft projectile
US2789507A (en) * 1952-06-14 1957-04-23 Mach Tool Works Oerlikon Fuze for rocket projectiles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982487A (en) * 1973-06-14 1976-09-28 S.A. Prb. Societe Anonyme Micro-delayed detonator for ballistic rockets and rockets thus equipped

Also Published As

Publication number Publication date
BE758555A (fr) 1971-04-16
DE1955812A1 (de) 1971-05-13
FR2069072A5 (fr) 1971-09-03
GB1334054A (en) 1973-10-17

Similar Documents

Publication Publication Date Title
US4455000A (en) Take-up mechanism for safety belts
FR2500617A1 (fr) Dispositif de surete pour fusee de projectiles stabilises par rotation
US3712231A (en) Safety-percussion cap responsive to rotation
US2448228A (en) Delay booster arming mechanism
US2149470A (en) Mechanical time fuse
US2409205A (en) Bomb fuse
US3877378A (en) Safety and arming mechanism
US4088076A (en) Spinning projectile equipped with an electromagnetic ignition current generator
US3861312A (en) Ignition device having an ignition sequence including fuse elements for preventing an unintentional release
US2750888A (en) Long delay bomb tail fuze
GB1223931A (en) Improvements in or relating to spin-stabilized explosive shell with base detonating fuse
US2457254A (en) Delay arming device for fuses
US2789508A (en) Safety and arming mechanism
US2094032A (en) Fuse for bombs
US3732825A (en) Impact fuze for a spin stabilized projectile
GB1215519A (en) Improvements in/or relating to percussion fuses
CA1303906C (fr) Fusee pour projectile
US6779457B2 (en) Percussion fuse (ignition device)
US4030418A (en) Gravity deployed mine with combined upper clearing charge firing and delayed main charge initiation
NO133683B (fr)
US3141434A (en) Torpedo ballast release
GB1224192A (en) Projectile fuse and projectiles equipped with said fuse
US2742859A (en) Nose fuze for a bomb
US3326131A (en) Self-dudding arming system for spun ammunition
US2870712A (en) Fuze for use on rotating artillery ammunition