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US2896540A - Control device for the percussion pin of a projectile fuse - Google Patents

Control device for the percussion pin of a projectile fuse Download PDF

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Publication number
US2896540A
US2896540A US549830A US54983055A US2896540A US 2896540 A US2896540 A US 2896540A US 549830 A US549830 A US 549830A US 54983055 A US54983055 A US 54983055A US 2896540 A US2896540 A US 2896540A
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US
United States
Prior art keywords
piston
pin
percussion
projectile
percussion 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
Application number
US549830A
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English (en)
Inventor
Voland Andre
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Individual
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Filing date
Publication date
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Publication of US2896540A publication Critical patent/US2896540A/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
    • F42C9/14—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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/285—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids stored within the fuze housing
    • 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
    • F42C9/06—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 flow of fluent material, e.g. shot, fluids

Definitions

  • the object of-the present invention is a control device for the hammer of a projectile fuse provided with muzzle safety and proximal trajectory safety devices and self- “destruction devices and comprising a percussion pin and a percussion spring disposed coaxially to the hammer.
  • the control device is characterized in that it comprises a dash-pot regulating the motion of the percussion pin and disposed coaxially to said pin, in that the buffer fluid in this dash-pot is a silicone having a chain structure containing Si(CH groups and a viscosity which remains substantially constant within a'wide range of temperatures, and in that it comprises a spring disposed coaxially to the percussion pin and actuating the mobile member of the dash-pot,
  • the fore end 8 of the percussion pin shaft is in contact with an elastic disk 9 arranged at the bottom of a inder 36 constitutes a chamber in which a piston 37 can slide axially, a compression spring 38 being fitted inside this piston and resting on the one hand against the bottom of the part 33, and on the other, against the bottom of the piston 37 in order to pull the latter in the downward direction in Fig. 1.
  • Three radial holes 39, spaced 120 apart, are provided in the lateral wall of the part 36 and in each of these a ball 43 is partially engaged.
  • three balls 49 constitute a stop preventing piston 37 from moving downwards in spite of the action of spring 38.
  • the diameter of the balls is such that on the inside they rest against the pin 3 of the hammer, whilst on the outside they are prevented from leaving their holes 39 by the skirt of the hollow piston 34.
  • cylinder 36 i are Patented July 28, 1959 and piston 37 forms a chamber the axis of which is that of the fuse, and which is filled with a mass 42 made of a silicone grease or oil having a linear or cyclic chain structure containing the groups Si(CH Each terminal point of the chain is effected by three methyl groups united to the silicon atom.
  • the viscosity of silicones of this type is an exponential function of the number of groups. It is thus possible to obtain the desired viscosity by judicious choice of the number of groups. It is also possible to obtain a silicone oil or grease having a given viscosity, by mixing silicones of diiferen't viscosities.
  • the pin 3 of the hammer is provided in its lower portion, with a part of larger diameter 24 which is capable of sliding in an axial hole 25 of the cylinder 36.
  • the upper part of member 5 is provided with a radial cylindrical hole 26, in which is fitted a piston 27, provided with a slot 28 over part of its length.
  • the extremity of the percussion pin 3, comprised between the'part of larger diameter and the point 4, passes through this slot 28, the width of which is such that the piston 27 prevents the percussion pin from moving further down than the position shown in Fig; 1 as long as this percussion pin is engaged in the slot 28.
  • the open end of the cylindrical hole 26 is provided with a stopping plug 29, pierced by a calibrated hole 30.
  • the part of this cylindrical hole 26 which is comprised between the piston 27 and the plug, forms a chamber which is filled with a mass 31, of the same nature as the mass 42.
  • the upper part of the chamber containing the mass 42 is provided with a calibrated hole 43 passing through member 33 and through which this chamber can communicate with a hollow space comprised between 33 and 1.
  • the components are shown in the position they occupy before the shot is fired.
  • the left-hand extremity of the piston 27, on the slotted side, is engaged in a notch 4-1, provided in the wall of the piston 34, which prevents this piston from following the pull of the spring 35.
  • the projectile is made to rotate by the rifling of the barrel of the weapon, and, owing to the effect of this rotation, the piston 27 which is arranged eccentrically in relation to the axis of the fuse, is urged away from this axis by the centrifugal force. Owing to this, it compresses the mass 31 which slowly escapes through the calibrated hole 30.
  • this hole 30 is chosen in such amanner that the piston 27 ceases to block the percussion pin (by cooperation of the edges of the slot 28 with the lower extremity of the enlarged part of the pin 3) after a lapse of time which is such that the muzzle safety as well as the proximal or immediate trajectory safety is assured. Any premature ignition of the discharge is thus precluded.
  • the piston 27 has moved sufliiciently to the right in Fig. l to release the percussion pin, the fuse is ready to operate by percussion against any kind of obstacle so as to produce the ignition of the charge by means of the point 4 of the percussion pin.
  • the fuse If within a certain time interval, which is determined in advance, the fuse has encountered no obstacle, it must ensure the self-destruction of the projectile as is well known. This is efiected in the following manner:
  • the piston. 27 begins by releasing the piston 34, owing to the fact that it leaves the notch 41. From that moment the piston 34 rises under the action of the spring 35 and drives the material 42 through the calibrated hole 43 in the part 33.
  • the described device enables the self-destruction of the projectile and the muzzle and proximal or immediate trajectory safety to be obtained in a simple and pure manner.
  • the adjustment of the time intervals for these two functions may be made easily and with precision by giving to the calibrated hole 30 the appropriate dimensions.
  • the consistency of the silicone greases prevents any leakage through the calibrated holes 21 and 30 whilst thedevices are kept in stock.
  • This part 62 with its slot 63, cooperates with the enlarged part 24 of the pin 3, as has been described withrespect to the part 27 and its slot 28 in the preceding jectile is accelerated, i.e., as long as it is in the barrel of the weapon. Owing to the rotation of the projectile, the part 62 is pulled in the outward direction, but it is unable to move as long as the part65 is engaged in the slot "64. Owing to the effect of this same rotation, the stud 57 is urged in the outward direction by the centrifugal force, and the split ring 58 tends to be opened. As
  • the ring cannot open and retains the stud 57 in its place.
  • this acceleration ceases, i.e., as soon as the projectile has left the barrel of the weapon, the part 47 is urged in the upward direction under the action of the ring 58 which opens under the action of the centrifugal force.
  • This ring is disengaged from the parts 46 and 47, and the stud 57 escapes in the outward direction into a chamber 66'of the body 1.
  • the stud 57 was engaged in a calibrated hole 67 of the part 48.
  • the material 68 in the brated hole 43 and the material 42 constitutes a dashpot.
  • the muzzle and proximal trajectory safety it is ensured by means of the dash-pot constituted by the piston 27, the calibrated hole and the material 31.
  • the interior of the body 1 of thefuse is provided with i an axial cylindrical chamber 45, in which are arranged two cylinder sections 46, 47.
  • the member 5 is provided with a cylindrical extension 48 extending inside the cylinder sections 46, 47 in order to fix to the body 1 a member 49, inside which is a cylindrical-chamber 50 through which the percussion pin 3 of the hammer passes longitudinally.
  • a compression spring 51 arranged inside the chamber 50 surrounds the pin 3, and resting against the upper closed portion of this chamber, pulls in the downward direction (in Fig. 2) a ring'52 which can slide axially in this chamber.. This ring is locked by two weights 53, fitted in radial holes 54 of the part 49.
  • welghts are in contact on the inside with the pin 3 of the hammer, and are prevented from leaving their hole 54 in the outward direction by the skirt of a hollow piston 55 which can slide, on the one hand, on the part 49, and on the other, in the cylindrical chambenlimited by the parts 48.
  • a compression spring 56 resting against the member 5, pulls the piston'55 in the upward direction in Fig. 2.
  • This piston is locked, in the position of the components shown, by a stud 57, fitted in a radial hole of the part 48 and which is held in place, on the inside, by a split metallic ring 58, provided between the two parts 46, 47 and around the exterior wall of the part 48.
  • the parts 46, 47 are chamfered so as to offer the shape of a truncated cone at their extremities which are in contact with the ring 58.
  • An axial clearance 59 exists bet-ween. theupper extremity of the part 47 and the upper bottom of the chamber 45.
  • the member 5 is provided with a radial hole 61, in which isfitted, eccentri'cally in relation to the of the chamber comprised between 48 and 49 above the piston 55, can then escape through this hole into the chamber 66. Then the piston 55, which is now no longer locked by the stud 57, drives the material'68 through the hole 67 and at the same time through calibrated orifices 69 provided in the upper part of the chamber containing this material. When the piston reaches and moves on beyond the upper edge of the hole 67, the material 68 can no longer escape through this hole; it can only continue to escape by the calibrated holes 69.
  • the part 65 ceases to retain the part 62, which under the action of the centrifugal force, starts to move in the outward direction and ceases to lock the shaft of the percussion pin. In this way the muzzle and proximal trajectory safety is secured. It will be remarked that the hole 67 is much larger than the holes 69, which is easy to understand, because the time required to secure the muzzle and proximal trajectory safety ,is much shorter than the time interval at the end of which self-destruction must occur.
  • the mass 68 is preferably of the same type as the one indicated above with respect to Fig. l. V
  • the locking means controlled by centrifugal force could actually be replaced by locking means controlled by the linear acceleration (instead of the angular acceleration) occurring at the time the projectile is fired.
  • a control device for the hammer of a projectile fuse provided with muzzle and proximal trajectory safety and self-destruction devices, comprising a percussion pin displaceable by said hammer, a percussion spring operatively associated with said pin for displacing the same to effect a detonation, a dash pot including a mobile member and operatively associated with said pin for regulating the displacement thereof, a bufier fluid in said dash pot and being constituted by a silicone having a chain structure containing Si(CH groups and a substantially constant viscosity despite temperature changes, a further spring operatively associated with said dash pot for actuating the mobile member thereof, first locking means for locking the percussion pin in position and the mobile member in position against the action of said further spring and releasing the mobile member in response to rotation of the projectile, second locking means operatively associated with said mobile member and said percussion spring for controlling the percussion spring and releasing the same to actuate the percussion pin in response to the displacement of said mobile member, said dash

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Golf Clubs (AREA)
US549830A 1954-12-06 1955-11-29 Control device for the percussion pin of a projectile fuse Expired - Lifetime US2896540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH789479X 1954-12-06

Publications (1)

Publication Number Publication Date
US2896540A true US2896540A (en) 1959-07-28

Family

ID=4536856

Family Applications (1)

Application Number Title Priority Date Filing Date
US549830A Expired - Lifetime US2896540A (en) 1954-12-06 1955-11-29 Control device for the percussion pin of a projectile fuse

Country Status (7)

Country Link
US (1) US2896540A (fr)
BE (1) BE542985A (fr)
CH (1) CH327324A (fr)
DE (1) DE1036715B (fr)
FR (1) FR1145984A (fr)
GB (1) GB789479A (fr)
NL (2) NL195300A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3112704A (en) * 1960-12-23 1963-12-03 Rheinmetall Gmbh Self-destroying fuze for a spinning projectile
US3118378A (en) * 1960-12-19 1964-01-21 Percussion fuze for rocket
US3118379A (en) * 1960-11-23 1964-01-21 Fuze for a gyratory projectile
US3126828A (en) * 1964-03-31 tafel
US3261293A (en) * 1963-11-22 1966-07-19 Avco Corp Time delay fuze
US3376819A (en) * 1965-02-09 1968-04-09 Brevets Aero Mecaniques Explosive appliances with a delay mechanism
US3397640A (en) * 1966-10-28 1968-08-20 Gen Electric Fuze with improved time delay and self-destruct mechanism
US3450047A (en) * 1967-11-08 1969-06-17 Us Army Spin stabilized projectile with self-destructive capability
US3453961A (en) * 1967-11-21 1969-07-08 Us Army Delay arming mechanism
EP0017427A1 (fr) * 1979-03-26 1980-10-15 The Commonwealth Of Australia Dispositif de retardement à temps et matériel utilisé en combinaison avec un tel dispositif
US4998476A (en) * 1989-04-18 1991-03-12 Diehl Gmbh & Co. Fuze for a bomblet
CN111928742A (zh) * 2020-06-30 2020-11-13 南京理工大学 一种提高擦地炸和自毁作用可靠性的引信

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US570065A (en) * 1896-10-27 Time-fuse for shells
US972425A (en) * 1904-08-23 1910-10-11 Bethlehem Steel Corp Fuse for explosive projectiles.
GB245766A (en) * 1925-01-06 1926-07-15 Schneider & Cie Safety device for very sensitive percussion fuses
FR742598A (fr) * 1933-03-10
US2405653A (en) * 1940-07-09 1946-08-13 Honger Guido Fuse for automatic destruction of shells
US2407037A (en) * 1939-10-21 1946-09-03 Frank J Sowa Lubricant and process of lubricating surfaces therewith

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE80580C (fr) *
FR731309A (fr) * 1931-02-12 1932-09-01 Derives De L Acetylene Soc Ind Procédé pour l'exécution de réactions d'oxydation organiques dans la phase vapeur
DE609374C (de) * 1933-01-03 1935-02-13 Helmut Junghans Fluessigkeitszeitzuender
FR807565A (fr) * 1935-02-19 1937-01-15 Anciens Ets Skoda Fusée percutante à relais, comportant un deuxième temps de destruction
CH201983A (de) * 1938-01-28 1938-12-31 Wallimann Isidor Geschosszünder.
DE736653C (de) * 1938-08-12 1943-06-24 Hugo Schneider Ag Aufschlagzuender
US2331633A (en) * 1939-06-20 1943-10-12 Henry W Spooner Fuse for projectiles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US570065A (en) * 1896-10-27 Time-fuse for shells
FR742598A (fr) * 1933-03-10
US972425A (en) * 1904-08-23 1910-10-11 Bethlehem Steel Corp Fuse for explosive projectiles.
GB245766A (en) * 1925-01-06 1926-07-15 Schneider & Cie Safety device for very sensitive percussion fuses
US2407037A (en) * 1939-10-21 1946-09-03 Frank J Sowa Lubricant and process of lubricating surfaces therewith
US2405653A (en) * 1940-07-09 1946-08-13 Honger Guido Fuse for automatic destruction of shells

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126828A (en) * 1964-03-31 tafel
US3118379A (en) * 1960-11-23 1964-01-21 Fuze for a gyratory projectile
US3118378A (en) * 1960-12-19 1964-01-21 Percussion fuze for rocket
US3112704A (en) * 1960-12-23 1963-12-03 Rheinmetall Gmbh Self-destroying fuze for a spinning projectile
US3261293A (en) * 1963-11-22 1966-07-19 Avco Corp Time delay fuze
US3376819A (en) * 1965-02-09 1968-04-09 Brevets Aero Mecaniques Explosive appliances with a delay mechanism
US3397640A (en) * 1966-10-28 1968-08-20 Gen Electric Fuze with improved time delay and self-destruct mechanism
US3450047A (en) * 1967-11-08 1969-06-17 Us Army Spin stabilized projectile with self-destructive capability
US3453961A (en) * 1967-11-21 1969-07-08 Us Army Delay arming mechanism
EP0017427A1 (fr) * 1979-03-26 1980-10-15 The Commonwealth Of Australia Dispositif de retardement à temps et matériel utilisé en combinaison avec un tel dispositif
US4328754A (en) * 1979-03-26 1982-05-11 Commonwealth Of Australia Time delay device
US4998476A (en) * 1989-04-18 1991-03-12 Diehl Gmbh & Co. Fuze for a bomblet
CN111928742A (zh) * 2020-06-30 2020-11-13 南京理工大学 一种提高擦地炸和自毁作用可靠性的引信

Also Published As

Publication number Publication date
NL195300A (fr)
NL90426C (fr)
DE1036715B (de) 1958-08-14
BE542985A (fr)
CH327324A (fr) 1958-01-31
FR1145984A (fr) 1957-11-05
GB789479A (en) 1958-01-22

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