US2236495A - Percussion fuse - Google Patents

Percussion fuse Download PDF

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Publication number
US2236495A
US2236495A US236366A US23636638A US2236495A US 2236495 A US2236495 A US 2236495A US 236366 A US236366 A US 236366A US 23636638 A US23636638 A US 23636638A US 2236495 A US2236495 A US 2236495A
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United States
Prior art keywords
fuse
support
percussion
locking
frame
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Expired - Lifetime
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US236366A
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English (en)
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Birkigt Marc
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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
    • 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

  • Fig. 1 is an axial sectional View of a percussion fuse made according to an embodiment of the invention
  • Fig. 2 is a sectional view, corresponding to the same embodiment, but showing the parts in different respective positions.
  • the general structure of the fuse, excepting the percussion means thereof, can be made of any suitable conventional manner, for instance as illustrated by the drawing.
  • the fuse includes a body 9 Claims.
  • the present invention relates to percussion fuses for projectiles rotating about their axes
  • ⁇ y temporarily locked in inoperative position by one or several pins adapted to be moved out of lockingposition, so as to release the percussion system, under the effect of the centrifugal acceleration resulting from the rotation of the projectile -about its axis.
  • the invention is more especially, although not exclusively, concerned with percussion fuses of this type for shells of small calibre.
  • the chief object of -the present invention is to provide a fuse of the type above referred to which is better adapted to meet the requirements of practice and in particular which avoids the serious drawback above mentioned.
  • the percussion fuse includes at least one pin adapted temporarily to lock the percussion system in inactive position, said pin lbeing adapted to be moved out of locking position by the centrifugal acceleration resulting 3 from the rotation of the projectile around its axis, and a recess is provided for receiving said pin, at the time of the release of the percussion system, so that it cannot be driven out of the fuse.
  • the pin in question serves to lock a striker which, together with said pin, is carried by a movable support temporarily maintained in a position of rest for which said pin and its recess or housing are not located in register with each other, said support being adapted to occupy,
  • a primercarrier 6 is provided with a flange caught between the fuse body I and said sheath 4.
  • the front part of the fuse is closed by means of a thin sheet or disc 1, which is, for instance, caught, along its periphery, between the body I and the cap 2 of the fuse.
  • lthis percussion system includes, in the known manner, a striker 8, normally kept in inactive position by pins 9 or equivalent means (two such pins being used in the embodiment shown by the drawing) adapted to be moved away radially, so as to release said striker, under the effect of the centrifugal acceleration resulting from the rotation of the pro- J'ectile about its axis.
  • the device is arranged in such manner that pins 9 can be driven off .into recesses ⁇ Il) capable of preventing them from being expelled from the body of the fuse.
  • these recesses are wholly closed at their end farthest from the axis of the fuse.
  • each of these recesses may be formed partly in the body I of the fuse and partly in its cap 2, by providing in these two last mentioned elements two radial holes, respectively, which open into an axial hole II forming a housing for striker 8.
  • Each of these radial recesses has a bottom I 0 against which the corresponding locking pin 9 is applied when the striker is released.
  • a fuse as above described further includes means for opposing premature release of striker 8, that is to say for preventing the'fuse from acting at too short a distance fromA the gunVV v port I2 is adapted to occupy, under the effect of certain variations of the acceleration of the projectile along its trajectory, an active position for which these pins are located opposite their respective recesses, so that they can now be moved r away radially under the effect of the centrifugal acceleration and release the striker.
  • I in order temporarily to maintain support I2 in its position ⁇ of rest, I provide a locking means capable of releasing said support under the effect of the centrifugal acceleration.
  • This locking means consists, for iny stance, of a split segment I3, interposed between the body I of the fuse and a shoulder I2 provided at the base of the sliding support I2.
  • pins 9 are made of frustoconical shape so that they can already be partly engaged in recesses Ill when support I2 is in position of rest.
  • the fuse according to the present invention has, in addition to the advantages above set forth, that of being of a simple construction, so that its cost of manufacture is relatively low and its operation is reliable.
  • a percussion fuse of the type described which comprises, in combination, a frame, a support movable axially in said frame between two extreme positions, a percussion device carried f support in an inoperative position, said locking member being movable radially away from the axis of the fuse by centrifugal force to release said percussion device, at least one hole in said frame, said hole being so located that said locking member is in register with said hole only when said support reaches its extreme position nearest the front of the fuse, and locking means for temporarily locking said support in its other extreme position, said last means being brought out of action by centrifugal force only, whereby said support can move towards the front of the fuse only after the shot is fired.
  • a percussion fuse of the type described which comprises, in combination, a frame, a support movable axially in said frame between two extreme positions, a striker carried by said support and movable axially with respect thereto, at least one locking pin mounted in said support normally locking said striker against movement with respect to said support in an inoperative position, said locking pin being movable radially away from the axis of the fuse by centrifugal force to release said striker, at least one hole in said frame, said hole being so located that said locking pin is in register with said hole only when sai-d support reaches its extreme position nearest the front of the fuse, and locking means for temporarily locking said support in its other extreme position, said last means being brought out of action by centrifugal force only, whereby said support can be moved towards the front of the fuse only after the shot is fired,
  • a percussion fuse of the type described which comprises, in combination, a frame, a support movable axially in said frame between two extreme positions, a percussion device carried by said support and movable axially with respect thereto, at least one locking member mounted in said support normally locking said percussion device against movement with respect to said support in an inoperative position, said locking member being movable radially away from the axis of the fuse by centrifugal force to release said percussion device, at least one hole in said frame, said hole being so located that said locking member is in register with said hole only when said support reaches its extreme position nearest the front of the fuse, at least one abutment carried by said frame, at least one inclined surface on said locking member, said abutment and inclined surface cooperating to produce by the centrifugal force acting on said locking member a reaction parallel to the axis of the fuse tending to move said support towards its extreme position nearest the front of the fuse, and locking means for temporarily locking said support in its other extreme position, said means being brought out of action by centri
  • a percussion fuse of the type described which comprises, in combination, a frame, a support movable axially in said frame between two extreme positions, a striker carried by said support and movable axially with respect thereto, at least one locking pin mounted in said support normally locking said striker against movement with respect to said support in an inoperative position, said locking member being movable radially away from the axis of the fuse by centrifugal force to release said striker, at least one hole in said frame, said hole being so located that said locking pin is in register with said hole only when said support reaches its extreme position nearest the front of the fuse, at least one inclined surface on said locking pin, at least one abutment carried by said frame, said abutment and inclined surface cooperating to produce by the centrifugal force acting on said locking pin a reaction parallel to the axis of the fuse tending to move said support towards its extreme position nearest the front of the fuse,and locking means for temporarily locking said support in its other extreme position, said means being brought out of action by centrifugal force
  • a percussion fuse according to claim 2 in which the outer end of said pin is of frusto-conical shape, and said locking means normally lock said support in such an axial position that said frusto-conical end is engaged at an intermediate point along its conical surface with the edge of said hole, whereby the centrifugal force acting upon said pin after the fuse has started rotating about its axis tends by reaction on the edge of said hole of said frusto-conical end to urge said support towards the front of the fuse.
  • a percussion fuse according to claim 1 in which the locking means of the support comprise a split segment interposed between said support and said frame and capable of being forced open by centrifugal force.
  • a percussion fuse according to claim 2 in which the locking means of the support comprise o a split segment interposed between said support and said frame and capable of being forced open by centrifugal force.
  • a percussion fuse according to claim 2 in which the locking means of the support comprise a split segment interposed between said support and said frame and capable of being forced open by centrifugal force and in which the outer end of said pin is of frusto-conical shape, and said locking means normally lock said support in such Y an axial position that said frusto-conical end is engaged at an intermediate point along its conical surface with the edge of said hole, whereby the centrifugal force acting upon said pin after the fuse has started rotating about its axis tends by reaction on the edge of said hole of said frustoconical end to urge said support towards the front of the fuse.
  • sai-d frame having a recess therein, said support having a flange thereon within said recess, and said locking means comprising a split elastic ring normallypositioned between said flange and the bottom of said recess.
US236366A 1938-01-21 1938-10-21 Percussion fuse Expired - Lifetime US2236495A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE208971X 1938-01-21

Publications (1)

Publication Number Publication Date
US2236495A true US2236495A (en) 1941-03-25

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US236366A Expired - Lifetime US2236495A (en) 1938-01-21 1938-10-21 Percussion fuse

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US (1) US2236495A (xx)
BE (1) BE425911A (xx)
CH (1) CH208971A (xx)
FR (1) FR849157A (xx)
GB (1) GB516035A (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421859A (en) * 1943-04-01 1947-06-10 Bendix Aviat Corp Mechanical time fuse
US2741183A (en) * 1945-05-26 1956-04-10 Raymond L Graumann Centrifugal projectile fuze

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758545A (en) * 1943-11-15 1956-08-14 Harry H Deringer Safety device for a projectile
NL71165C (xx) * 1946-12-07 Energa

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421859A (en) * 1943-04-01 1947-06-10 Bendix Aviat Corp Mechanical time fuse
US2741183A (en) * 1945-05-26 1956-04-10 Raymond L Graumann Centrifugal projectile fuze

Also Published As

Publication number Publication date
GB516035A (en) 1939-12-20
FR849157A (fr) 1939-11-15
CH208971A (fr) 1940-03-15
BE425911A (xx)

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