US3616757A - Impact fuse for a spinning projectile - Google Patents

Impact fuse for a spinning projectile Download PDF

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Publication number
US3616757A
US3616757A US742592A US74259268A US3616757A US 3616757 A US3616757 A US 3616757A US 742592 A US742592 A US 742592A US 74259268 A US74259268 A US 74259268A US 3616757 A US3616757 A US 3616757A
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US
United States
Prior art keywords
rotor
fuse
sleeve
casing
coiled band
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
US742592A
Other languages
English (en)
Inventor
Fritz Berger
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
Priority claimed from DER39998A external-priority patent/DE1259740B/de
Application filed by Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3616757A publication Critical patent/US3616757A/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
    • F42C15/20—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
    • 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
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
    • F42C15/192—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile
    • F42C15/196—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier rotatable in a plane which is parallel to the longitudinal axis of the projectile by the action of centrifugal or inertia forces on the carrier body, e.g. the carrier having eccentrically mounted weights or eccentric centre of gravity
    • 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
    • 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
    • F42C9/16—Double fuzes; Multiple fuzes for self-destruction of ammunition
    • 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
    • F42C9/16—Double fuzes; Multiple fuzes for self-destruction of ammunition
    • F42C9/18—Double fuzes; Multiple fuzes for self-destruction of ammunition when the spin rate falls below a predetermined limit, e.g. a spring force being stronger than the locking action of a centrifugally-operated lock

Definitions

  • a percussion fuse for spinning projectiles which comprises a casing having a front part and a rear part and a sleeve secured in the rear part of the casing and having a bearing surface.
  • a ball carrier with balls is mounted slidably in the casing and in the sleeve and has a striker pin thereon.
  • a fuse body is secured in the rear part of the casing and spaced on the sleeve.
  • a rotor is mounted torotate between the fuse body and the sleeve and has a coiled band around the rotor and has a percussion cap therein.
  • a fuse plunger is slidably mounted in the casing and extends into the sleeve.
  • the rotor is normally held in inoperative position by the coiled band and when the projectile is fired a centrifugal spinning force will act on the band to hold the rotor in an unarmed position for a predetermined period of time, so that when the balls in the ball carrier force the latter away from the rotor, the striker pin will be in position to plunge into the percussion cap when the projectile strikes a target.
  • the coiled band surrounds at a distance the rotor in its inoperative position, and a locking pin is disposed radially and bridging the distance engaging the inner coil layer of the coiled band and entering a recess of the rotor 'such, that the release and erection of the latter is possible only, when the innermost coil layer has expanded at least for the amount of depth of penetration of the locking pin into the recess.
  • the present invention relates to a percussion fuse for twisting or spinning projectiles, the fuse having a rotor to be righted into an ignition position under the effect of a centrifugal force and having an axially slidable striker pin bearing, in the transport position, against a supporting surface of the rotor and securing it against movement to ignition position and constitutes a further development of the subject matter of applicants own prior Pat. No. 3,353,489, dated Nov. 21, 1961, according to which an additional locking device consisting of a radially coiled band is coordinated to the rotor.
  • the coiled band starts with the swinging only at the end of the projectile acceleration and upon full effect of the centrifugal force caused by the projectile twist, thus, only after the projectile has left the muzzle, the righting of the rotor is retarded as long, until its full peripheral face passes the innermost coil layer of the coiled band which did swing out.
  • the rotor which is likewise under the effect of a centrifugal force, can erect itself from its inclined position until its symmetrical axis coincides with the fuse axis. By this arrangement, the ready position for ignition is set.
  • the coiled band in accordance with the present invvention, does not engage directly the rotor, rather surrounds the latter with some I distance, merely a distanclng member connecting these two parts in form of a locking pin, capable of effecting the centrifugal force, is required with which locking pin, after a certain swing performance of the coiled band, the lock for the rotor is released.
  • This cylinder part belongs to an intermediate member disposed between the bush and a locking screw, which intermediate member receives on its collar, disposed adjacent the locking screw, the coiled band, and, furthermore, has a radial bore for reception of the locking pin, and finally serves also as a bearing for the rotor formed as a disc and equipped with lateral bearing pins.
  • the coiled band is equipped with a high friction force in axial direction, which friction force makes it possible to be maintained as long as a closed spring package under the effect of the projectile acceleration occurring during the shooting until towards the end of the acceleration, that means when the projectile has already left the muzzle, the centrifugal force can become fully effective. This is brought about such that the coiled band with the abutment edges of all coil layers opposite to the fuse point can press rigidly against the ignition body.
  • a fuse with a ball rotor swingably mounted in a housing has been known, which is secured by a plurality of radial pins relative to the housing.
  • the pins In order that the pins do not escape from the housing during transportation, and to be able to release the rotor in the ignition position, it is provided that all pins are held together by an open annular spring surrounding the housing.
  • FIG. 1 is an axial section of a percussion fuse with a self-destroying device in transport position
  • FIG. 2 is a section along the lines IIII of FIG. 1;
  • FIG. 3 is a section similar to that shown in FIG. 2 after completed bore safety with displaced arranged locking pin.
  • the self-destroying system disposed in the front portion of the fuse part corresponds with the device described in greater detail in applicants own Pat. No. 3,353,489, and thus no further description of that part is required.
  • the device serving the bore safety is arranged in the rear fuse part and comprises a sleeve 2 receiving a stroker pin 4a and partly also a rotor 9 and an intermediate member 18 inserted between the sleeve 2 and a locking screw 10, which intermediate member 18 supports itself, as can be determined from FIGS. 2 and 3, on the one hand, on the locking screw 10, and, on the other hand, surrounding the rotor 9 by bearing towards the sleeve 2.
  • the intermediate member 18 is rigidly connected with the sleeve 2 by pins or the like (not shown) and simultaneously also secured against rotation.
  • the intermediate member 18 serves as a bearing for the rotor 9 formed as a disc and having lateral bearing pins 91;, as well as for reception of the coil band and of a locking pin 19 arranged in a radial bore 18a.
  • the radial bore 18a which is disposed parallel to the rotary axis of the rotor and passes perpendicularly below the axis through the intermediate member 18, is arranged in a recess 9c provided at the lower periphery of the rotor 8.
  • the locking pin 19 projects with its conical end into the correspondingly formed recess 19c.
  • the latter consisting of a plurality of coiled layers, engages no more directly the body 18b, rather engages a sleeve 20 and the opening of which is measured such that the sleeve 20, jointly with the coiled band 15 mounted to form a slightly pretensioned compact spring package, surrounds easily rotatable the body 18b.
  • the characteristical feature of the sleeve 20 resides in an arrangement according to which, with its low height, which corresponds to about one half of the width of the coiled band 15, only the half of the coiled band 15 which points to the fuse point is mounted thereon, whereby the corresponding abutment edges of all winding layers are covered by a broad rectangularly bent over flange 20a.
  • the sleeve 20 terminates slightly above the radial bore 18, so that the looking pin 19 comes into engagement without interference with the inner winding layer of the coiled herel 15.
  • the length of the locking pin 19 is dimensioned such that it is movably guided in its non-effected state between the coiled band 15 and the recess 90 with slight play.
  • a hollow space 17 extending far into the ignition housing 1 is available for the coiled band 15 for expan- 4 sion.
  • the rotor 9 In the transportation position, the rotor 9 assumes the position shown in FIGS. 1 and 2, in which the ignition channel is disposed jointly with the percussion cap 12 obliquely to the fuse axis. In this position, it is secured by the percussion pin 4a standing under the effect of the spring 6, as well as above the locking pin 19 by means of the coiled band 15.
  • the opening of the coiled band 15 sets in for which, depending upon the length of the spring band and the number of the coil layers, an exact predetermined time period is required. Since outside of the non-essential point engagement by the locking pin 19 no friction forces affect from the outside the coiled band 15, the predetermined opening time period for the coil band 15 can be very exactly determined and retained.
  • the locking pin 19 disposed in the radial bore 18a must remain in locking position in spite of the effect of the centrifugal force, as long until the innermost coil layer of the coiled band 15 starts its opening by setting off from the sleeve 20.
  • the innermost coil layer must at least be capable of swinging for the amount of the penetration depth of the locking pin 19 into the rotor recess 9b, so that the rotor 9 becomes free relative to the locking pin 19 and can erect itself due to its own erection moment from the oblique position such that the percussion cap 12 is disposed directly opposite to the percussion pin 4a with the precussion point 4b.
  • the hollow space 17 In order to assure that the locking pin 19 releases in each case the rotor 9, it is suitable to dimension the hollow space 17 such that the inner coil layer can open up for a larger degree relative to the rest position of the coiled band than the locking pin 19 for releasing of the rotor.
  • the flight length of the projectile designated as bore safety is terminated.
  • This position shows the locking pin 19 which is set ofi for If the fuse now hits the target object, during impression of the percussion point and the fuse plunger 7 with the striker point 4b, the percussion cap 12, freely disposed in the rotor 9, is pierced, which, in turn, brings about a trans mission load (not shown) and thereby the explosive charge detonation.
  • This fuse to be used universally with an abutmentand self-destroying device and with a real improvement of the bore safety, which fuse has an extremely simple structure and a remarkable function safety, can be dimensioned with the same precision such that it is applicable for large caliber, as well as for small caliber projectiles, down to 2 cm. projectile caliber.
  • a percussion fuse ofr spinning projectiles comprismg a casing having a front part and a rear part,
  • a rotor mounted to rotate between said fuse body and said sleeve and having a coiled band around said rotor and having a percussion cap therein,
  • a fuse plunger slidably mounted in said casing and extending into said sleeve
  • said rotor being normally held in inoperative position by said coiled band and when said projectile is fired a centrifugal spinning force will act on said band to hold said rotor in an unarmed position for a predetermined period of time, so that when said balls in said ball carrier force the latter away from said rotor, said striker pin will be in position to plunge into said percussion cap when said projectile strikes a target,
  • said coiled band surrounds at a distance said rotor in its inoperative position
  • a locking pin disposed radially and bridging said distance engaging the inner coil layer of said coiled band and entering a recess of said rotor such, that the release and erection of the latter is possible only, when the innermost coil layer has expanded at least for the amount of depth of penetration of said locking pin into said recess.
  • said intermediate member having an end face set ofi laterally and inwardly below said two bearing pins, and
  • said end face is an abutment for said coiled band and is equipped with a passing radial bore for receiving said locking pin.
  • said sleeve received the half of said coiled band pointing towards said ignition point
  • said locking pin is freely passable directly below said ignition point.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Automotive Seat Belt Assembly (AREA)
US742592A 1965-02-26 1968-07-05 Impact fuse for a spinning projectile Expired - Lifetime US3616757A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DER39998A DE1259740B (de) 1965-02-26 1965-02-26 Aufschlagzuender fuer Drallgeschosse
DE19671578502 DE1578502A1 (de) 1965-02-26 1967-07-05 Aufschlagzuender fuer Drallgeschosse

Publications (1)

Publication Number Publication Date
US3616757A true US3616757A (en) 1971-11-02

Family

ID=25753205

Family Applications (1)

Application Number Title Priority Date Filing Date
US742592A Expired - Lifetime US3616757A (en) 1965-02-26 1968-07-05 Impact fuse for a spinning projectile

Country Status (5)

Country Link
US (1) US3616757A (en:Method)
CH (1) CH517933A (en:Method)
DE (1) DE1578502A1 (en:Method)
FR (1) FR95222E (en:Method)
NL (1) NL6809430A (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871297A (en) * 1972-10-13 1975-03-18 France Etat Percussion fuses with a tilting rotor for gyratory projectiles
US3994230A (en) * 1974-09-02 1976-11-30 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Self-destruction type nose impact fuze for spinning projectiles
US4109583A (en) * 1976-04-09 1978-08-29 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4159679A (en) * 1976-07-09 1979-07-03 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4242963A (en) * 1978-09-25 1981-01-06 General Electric Company Delayed arming fuze for a spinning projectile
US8443728B2 (en) * 2011-09-23 2013-05-21 Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense Impact fuze for a high-spin self-destructing device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2449265A1 (fr) * 1979-02-16 1980-09-12 Haut Rhin Manufacture Machines Dispositif de verrouillage de percuteur pour une fusee de projectile giratoire
DE3631995A1 (de) * 1986-09-20 1988-03-31 Franz Weber Vorrichtung fuer die schraubbetaetigung von panzergewinde-verschraubungen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871297A (en) * 1972-10-13 1975-03-18 France Etat Percussion fuses with a tilting rotor for gyratory projectiles
US3994230A (en) * 1974-09-02 1976-11-30 Werkzeugmaschinenfabrik Oerlikon-Buhrle Ag Self-destruction type nose impact fuze for spinning projectiles
US4109583A (en) * 1976-04-09 1978-08-29 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4159679A (en) * 1976-07-09 1979-07-03 The United States Of America As Represented By The Secretary Of The Army Projectile fuze
US4242963A (en) * 1978-09-25 1981-01-06 General Electric Company Delayed arming fuze for a spinning projectile
US8443728B2 (en) * 2011-09-23 2013-05-21 Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense Impact fuze for a high-spin self-destructing device

Also Published As

Publication number Publication date
CH517933A (de) 1972-01-15
NL6809430A (en:Method) 1969-01-07
FR95222E (fr) 1970-06-29
DE1578502A1 (de) 1971-05-19

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