US1943706A - Self-retarding mechanical percussion fuse for projectiles - Google Patents

Self-retarding mechanical percussion fuse for projectiles Download PDF

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Publication number
US1943706A
US1943706A US555442A US55544231A US1943706A US 1943706 A US1943706 A US 1943706A US 555442 A US555442 A US 555442A US 55544231 A US55544231 A US 55544231A US 1943706 A US1943706 A US 1943706A
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United States
Prior art keywords
striker
fuse
percussion
cylinder
projectiles
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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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US555442A
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English (en)
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Varaud Andre
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Individual
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
    • F42C1/02—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze
    • F42C1/08—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze with delayed action after ignition of fuze or after impact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C1/00—Impact fuzes, i.e. fuzes actuated only by ammunition impact
    • F42C1/02—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze
    • F42C1/04—Impact fuzes, i.e. fuzes actuated only by ammunition impact with firing-pin structurally combined with fuze operating by inertia of members on impact

Definitions

  • the object of the present invention is a selfretarding mechanical percussion fuse, for projectiles, characterized by mechanical means which, at the moment of impact, prevent ignition of the charge by point of the striker at least until the moment when an important part of the momentum of the projectile has been absorbed by the obstacle.
  • Fig. 1 shows the fuse and the shell according to the first form of execution in axial section in a transportable condition.
  • Fig. 2 is an axial section ofthe shell with its pyrotechnical equipment and shows the position taken up by the organs of the device at the moment of impact.
  • Fig. 3 is also an axial section of the shell, at the moment of function of the percussion, after the projectile has overcome the resistance of the obstacle or that its momentum is almost entirely absorbed.
  • Fig. 4 is a cross section made according to the une A-A of Fig. 1,
  • Fig. 5 is a View in detail in elevation of the striker of the fuse and,
  • Fig. 6 is an elevation of the organ of command of the percussion.
  • Fig. '7 is an axial section of the fuse according to the second form of execution with its pyrotechnical equipment and shows the position of the various organs in a transportable condition.
  • Fig. 8 is also an axial section of the fuse as shown in Fig. 7, but at the moment of impact (beginning of the movement).
  • Fig. 9 is an axial section of the fuse showing the position of the various organs at the moment of impact (termination of the movement).
  • Fig. 10 is an axial section of the fuse, at the moment of function of the percussion, after the projectile has overcome the resistance of the obstacle or that its momentum is almost entirely absorbed.
  • the fuse according to the rst form of execution comprises: the bottom plug 1 on which is screwed a body 2 which carries a socket at its front extremity, screwed on to the body and containing the primary detonator.
  • the body 2 is pierced longitudinally by two cylindrical bores, which lie parallel to the axis of the projectile and at an equal distance from this axis.
  • a striker 4 toothed in the manner of a rack (o1. 1oz-39) 4a, can slide freely and in the other a cylinder 5 also toothed in the same manner.
  • This striker 4 and this cylinder 5 are joined together in their movements by a pinion 6, radially situated between them, which cooperates with their respective teeth.
  • a Screwed plug 6a maintains this pinion in its place.
  • the striker 4 acts under the influence of a helicoidal spring 4b which tends to push the latter towards the percussion cap 8.
  • the function'of the fuse is the following:
  • the organs of the fuse do not leave the position they occupy in Fig. 1, either during the lineal acceleration or during the ilight.
  • the cylinder 5 comes, by inertia, into the position represented in Fig. 2, and by means of its teeth draws the pinion 6 in the clockwise direction; this latter simultaneously communicates its movement to the striker 4, by the intermediary of the strikers teeth 4a,4 which compresses the spring 4b in causing the striker to retreat from the percussion cap.
  • a fla-t cut part 4c is provided (Fig. 5) in order that the last tooth of said striker may suddenly escape the teeth of the pinion 6, and thus cause the percussion spring 4b to stretch and cause the deagration of the percussion cap 8 and at the same time the explosion of the projectile.
  • the fuse according to the second form of execution also comprises a bottom plug 10 which alone has been represented in Figures 7 to 10.
  • This plug is partly grooved, this grooving comprising two cylindrical bores, which lie parallel to the a-,XiS of the projectile and at an equal distance from the axis. These two bores are closed by a socket 11 screwed in the plug, and containing the primary detonator.
  • a striker 12 formed by a short cylinder rendered lighter by a circular neck andY carrying, on the one hand, the point of the striker, and on the other hand, an abutment 13.
  • a cylinder 14 may slide having three notches of which one, 15, relatively short is separated from another, 16, relatively long, by a tooth 17, the third notch 18 taking the form of the centrifugal bolt 19 penetrating into this third notch.
  • the striker 12 and this cylinder 14 are dependent upon each other in their movement by an oscillating organ 20 in the form of a lever of which one arm is able to penetrate into one or the other of the notches 15 and 16 and the other arm of which, in the form of a beak, is able to retain the striker 12 away from the percussion cap 21.
  • This oscillating organ 20 turns about a pivot situated in the axis of the fuse and directed according to a diameter of this latter perpendicular to the plane passing through the axis of the two bores.
  • rIhe striker 12 is under the action of a helicoidal spring 22 which tends to push this latter towards the percussion cap 21.
  • a rod 23 is placed concentrically to this spring and is intended, at a given moment, to be met by the abutment 13 of the striker 12.
  • the cylinder 14, by inertia takes up the position represented in Fig. 8,. So doing, it causes, by the intermediary of the tooth 17, an oscillation of the organ 20 in the clockwise direction and by reason of this, a compression of the spring 22 by momentarily drawing the striker 12 away from the percussion cap 21.
  • the striker abuts against the rod 23 of which the length must be such that the oscillating organ 20 may be moved out of the path of the tooth 17, but not accomplish a rotation such that the pressure of the striker on the organ 20, no longer acting upon the beak, causes a blockage of the whole device.
  • this notch must be such that it stops the oscillation of the organ 20 in a position where the beak of this latter still retains the striker l2 which will, however, be brought nearer to the percussion cap 21.
  • the striker is liberated and penetrates into the percussion cap and produces the Vdeflagration of same, the organs of the f use then occupy the position represented in Fig. 10.
  • the device according to the invention may be applied to a head fuse, for all kinds of artillery projectiles or others, aeroplane bombs, etc. without the scope of the invention being limited in any way.
  • a self-retarding mechanical percussion fuse for projectiles comprising a body'pierced by two cylindrical bores which lie parallel to the axis of the fuse and situated at an equal distance from Said axis, a striker freely slidable in one of the bores and a cylindrical mass in the other, the striker and mass being toothed inthe manner of a rack, a pinion connecting these last ⁇ namedv the same, and a. centrifugal bolt associated with the icylindrical mass by which the same is retained in position until moved due to its inertia at the moment of impact of the projectile.
  • a self-retarding mechanical percussion fuse for projectiles comprising a body member, a toothed striker and toothed cylindrical mass freely slidable in separate bores provided for the same in the body, the bores being arranged parallel to the axis of the projectile, a pinion connecting the striker and mass at the toothed portions of the same, a percussion cap, a percussion spring associated with the striker, a centrifugal bolt associated with the cylindrical mass by which the same is retained in position until moved due to its inertia at the moment of impact of the projectile, the mass at such time urging the striker through the medium of the pinion to compress the percussion spring, the striker then being urged against the percussion cap by the expansion of the percussion spring.
  • a self-retarding mechanical percussion fuse for projectiles comprising a body pierced by two cylindrical bores which lie parallel to the axis of the fuse and situated at an equal distance from this axis, a striker freely slidable in one of the bores and a cylindrical mass in the other, an oscillating lever engaging, on the one hand, a. notch in the cylindrical mass and retaining, on the other hand, by means of a beak, the striker element, a percussion spring associated with the striker to maintain the same in a position against the beak of the lever, and a centrifugal bolt for normally retaining the cylindrical mass irnmovable.
  • a self-retarding mechanical percussion fuse for projectiles comprising a striker and a cylindrical mass each sliding freely in one of two cylindrical bores, which lie parallel to the axis of the projectile, a percussion spring for urging the striker to a ring position, an oscillating lever engaging in a notch of the mass, and retaining the striker by means of a beak against the action of the spring, a centrifugal bolt for normally retaining the cylindrical mass immovable, the mass having a second notch, which the oscillating lever engages after the same has moved forward due to its inertia at the moment of impact of the projectile, to thereby facilitate the movement of the lever so that its beak leaves the striker.
  • a self-retarding mechanical percussion fuse for projectiles comprising a striker and a cylindrical mass each sliding freely in one of two cylindrical bores which lie parallel to the axis of the projectile, said cylindrical mass having two notches thereon, a percussion spring for urging the striker to a ring position, an oscillating lever engaging, on the one hand, a notch of the cylindrical mass, and on the other, retaining by means of a beak the striker against the action of the percussion spring, a percussion cap, an abutment limiting the recoil of the striker away from the percussion cap when a forward movement of the cylindrical mass at the moment of impact, causes the said striker to compress the percussion spring by the intermediary of the beak of the oscillating lever, when the oscillating organ disengages with the notch of the cylindrical mass to engage in the second notch of said mass.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Air Bags (AREA)
  • Emergency Lowering Means (AREA)
US555442A 1930-08-07 1931-08-06 Self-retarding mechanical percussion fuse for projectiles Expired - Lifetime US1943706A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH148799T 1930-08-07
GB6037/32A GB377914A (en) 1930-08-07 1931-07-30 Improvements in or relating to self-retarding mechanical percussion fuses for projectiles

Publications (1)

Publication Number Publication Date
US1943706A true US1943706A (en) 1934-01-16

Family

ID=25715266

Family Applications (1)

Application Number Title Priority Date Filing Date
US555442A Expired - Lifetime US1943706A (en) 1930-08-07 1931-08-06 Self-retarding mechanical percussion fuse for projectiles

Country Status (6)

Country Link
US (1) US1943706A (enrdf_load_stackoverflow)
CH (1) CH148799A (enrdf_load_stackoverflow)
DE (1) DE556631C (enrdf_load_stackoverflow)
FR (1) FR720925A (enrdf_load_stackoverflow)
GB (2) GB371247A (enrdf_load_stackoverflow)
NL (1) NL29630C (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487056A (en) * 1941-07-09 1949-11-08 Us Sec War Hydraulic fuse
US2836118A (en) * 1953-09-25 1958-05-27 Bofors Ab Fuse for an explosive projectile
US2838998A (en) * 1941-07-07 1958-06-17 Harry H Deringer Hydrostatic tail fuse
US2929936A (en) * 1958-03-28 1960-03-22 George P Miller Electric generator control means
US2943573A (en) * 1959-01-05 1960-07-05 Gilbert E Graser Self destruction device
US2989924A (en) * 1957-04-03 1961-06-27 Junghans Helmut Percussion fuses for unrotated projectiles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4573706A (en) * 1984-02-15 1986-03-04 Breed Corporation Passenger compartment sensor requiring substantial velocity change
US4666182A (en) * 1984-02-15 1987-05-19 Breed Corporation Non crush zone-all mechanical damped sensor
SE463436B (sv) * 1989-08-25 1990-11-19 Bofors Ab Anordning vid fraemst laang ammunitionsenhet med taendroersfunktion kaensligt foer anslag mot saavael mjukt som haart maal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2838998A (en) * 1941-07-07 1958-06-17 Harry H Deringer Hydrostatic tail fuse
US2487056A (en) * 1941-07-09 1949-11-08 Us Sec War Hydraulic fuse
US2836118A (en) * 1953-09-25 1958-05-27 Bofors Ab Fuse for an explosive projectile
US2989924A (en) * 1957-04-03 1961-06-27 Junghans Helmut Percussion fuses for unrotated projectiles
US2929936A (en) * 1958-03-28 1960-03-22 George P Miller Electric generator control means
US2943573A (en) * 1959-01-05 1960-07-05 Gilbert E Graser Self destruction device

Also Published As

Publication number Publication date
NL29630C (enrdf_load_stackoverflow) 1933-04-15
FR720925A (fr) 1932-03-01
CH148799A (fr) 1931-08-15
DE556631C (de) 1932-08-15
GB377914A (en) 1932-08-04
GB371247A (en) 1932-04-21

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