CA1227966A - Percussion fuse - Google Patents
Percussion fuseInfo
- Publication number
- CA1227966A CA1227966A CA000474567A CA474567A CA1227966A CA 1227966 A CA1227966 A CA 1227966A CA 000474567 A CA000474567 A CA 000474567A CA 474567 A CA474567 A CA 474567A CA 1227966 A CA1227966 A CA 1227966A
- Authority
- CA
- Canada
- Prior art keywords
- primer
- fuse
- impact
- capsule
- firing 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
Links
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
- F42C9/142—Double fuzes; Multiple fuzes combined time and percussion fuzes in which the timing is caused by combustion
-
- 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
- F42C15/184—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 slidable carrier
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Laminated Bodies (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
ABSTRACT
Unexploded shells are dangerous in that the projectile ma be detonated by the wrong handling or even simply by moving it. Compressed springs (16, 35) in the fuse mechanism which may be disturbed and trigger ignition are particularly dangerous. The present invention provides a fuse mechanism which uses two primer capsules (12, 13) with one of the primer capsules being carried on a slide member.
The firing pin for the second capsule passes through an opening in the slide member so that if the slide member is only partially displaced detonation of a second capsule can, nevertheless, be achieved. This results in the detonation of both primer capsules although the shell itself does not explode. It is then left in a safer condition for disassembly.
Unexploded shells are dangerous in that the projectile ma be detonated by the wrong handling or even simply by moving it. Compressed springs (16, 35) in the fuse mechanism which may be disturbed and trigger ignition are particularly dangerous. The present invention provides a fuse mechanism which uses two primer capsules (12, 13) with one of the primer capsules being carried on a slide member.
The firing pin for the second capsule passes through an opening in the slide member so that if the slide member is only partially displaced detonation of a second capsule can, nevertheless, be achieved. This results in the detonation of both primer capsules although the shell itself does not explode. It is then left in a safer condition for disassembly.
Description
The present invention relates to a percussion fuse for projectiles having two primer capsules. A carrier is provided for one of the primer capsules which moves between a safety position and a firing position. In the safety position it prevents ignition of the shell during firing The fuse is such -that one of the primer capsules is impacted by a firing pin after the shell has hit the target.
Percussion fuses of this type are shown in Swiss Patent 360,927 and German Patent 1,120,940. These patents show fuse mechanisms in which both primer capsules are located in the carrier member. A second firing pin can only impact on the second primer capsule after a delay period whereupon the second firing pin is moved against the capsule by a prestressed spring. The displacement of the carrier is controlled by a delay mechanism consisting of a gear train and spring arrangements. The carrier is moved from its safety position to its firing position by spring forces. Ignition of one or other of the primer capsules can only be achieved when the carrier has been pushed completely to the firing position because only at that point can the tip of the firing pin impact the primer capsule.
A disadvantage of such known fuses is that an unexploded shell can be dangerous because there are two prestressed springs in the fuse. One of the springs, for example that moving the carrier member, could subsequently move it to the firing position and the other spring could then subsequently actuate the second firing pin. Even without the second spring the weight of the firing pin might be .
~2~?6~
sufficient to cause it to impact on the second primer capsule and detonate it even with only inertial force.
The requirements for a fuse include:
(a) high reliability - -that is, even under unfavorable conditions the fuse should detonate reliably;
(b) high safety factor with unexploded shells, -that is, rough handling should not be able subsequently to detonate an unexploded shell.
The present invention seeks to provide a percussion fuse with a high safety factor with unexploded shells and at the same time having high reliability.
The present invention relates to a percussion fuse for a projectile comprising a fuse housing containing two primer capsules, a firing pin adapted to be displaced to impact on one of the capsules after impact of the projectile on a target, a carrier movable between a safety position and a firing position and carrying one of the primer capsules, the other primer capsule being located in the fuse housing spaced from the main ignition path, the carrier defining an opening through which the firing pin can move to impact on the other primer capsule.
To maintain the same degree of safety during transport and loading then the first primer capsule should preferably be located when in the firing position between a fuse path and the second primer capsule so that ignition of the second primer capsule does result in ignition of the fuse path. To improve the probability that the shell will function reliably a third primer capsule can be positioned in the fuse casing with a third delayed firing pin to impact on it.
` - 2 -Embodiments of the invention will now be described in conjunction with the following drawings in which:
Figure 1 is longitudinal section through a percussion fuse in accordance with the present invention;
Figure 2 is a section along the line II-II shown in Figure l;
Figure 3 is a section along the line III-III
shown in Figure l; and Figure 4 is a section along the line IV-IV shown in Figure 3 which gives enlarged detail from that shown in Figure 2.
or Referring now to Figure 1, fuse head 2 is shown thread ably attached to the forward section of a fuse housing 1 having a booster charge 3 thread ably attached to the rear thereof. An impact head 4 is displaceable mounted on the fuse head and carries a firing pin 5 which is used when detonation of the fuse immediately on impact is required. A
spring 6 extends between the impact head 4 and a guide bearing 7 received in the fuse head and urges the firing pin upwardly. A casing 8 contains a spring-biased, trays-tersely movable, slide member 10 which carries a primer capsule (12). The slide member has a safety position which avoids premature detonation of the fuse and is movable to a firing position under the control of a delay mechanism 9.
Slide member 10 is mounted for transverse movement in a rectangular groove formed in a guide member 11. Slide member 10 contains a primer capsule 12 to be impacted by the firing pin 5 and, as can be seen in Figure 2 the guide member 11 contains a second primer capsule 13 which can be impacted from underneath by a delay firing pin 14. Figure 3 demonstrates the relative positioll of the two primer capsules 12 and 13 with respect to the axis of the fuse head.
A blind bore 15 is provided on the slide member 10 and, in the safety position, is located on the axis of the fuse head. A spring 16 (Figure 3) positioned in a transverse bore in the slide member 10 has one side on the slide member and the other on a guide pin 17 -to urge the slide member towards the firing position. Such movement is prevented before firing by the provision of a locking member 18 carried oh in a longitudinal bore 19 of the fuse housing. Member 18 is urged into a blocking position by spring 20 and in that position prevents transverse movement of the slide member.
Locking member 18 is retained in its locking piston by ball bearings 20 which engage with an annular slot 22 in a bore formed in housing 19. The ball bearings are retained in this position by a bolt 23 movable inside locking member 18. A spring 24 urges bolt 23 into this locking position.
Slide member 10 is formed with a rack 25 cooperating with a pinion 26 carried in the guide member 11. Pinion 26 is, in turn, driven by an oscillating mass, not shown, through gear train 27. This assembly forms the delay messianism 9 which postpones movement of the slide member 10 from the safety position thereby ensuring against premature detonation. Fuse housing 1 is provided with a bore 28 containing primer material and forming a fuse path extending from the undersurface of the slide member 10 to a booster charge 3.
The mechanism for the delayed ignition firing pin is contained in a further bore 29 (Figure 2) located parallel to the bore containing the primer train. Bore 29 contains a cylinder 30 attached thereto at its lower end. The upper end of cylinder 30 has a circumferential, annular slot 31 and projects into a bore of firing pin 14. A housing 32 is movable in bore 29 and surrounds the cylinder 30. In its inactive position housing 32 rests on the base 33 of cylinder 30. A spring 35 is provided having one end resting on a shoulder 34 of housing 32 and the other abutting on the lower ;
end of delayed firing pin 14. Firing pin 14 is restrained from upward movement by blocking members 36 contained in the circumferential annular slot of cylinder 30. These blocking members extend into radial bores formed on the lower end of firing pin 14 and rest against. the inner wall of a housing 37 which is of the same diameter as housing 32 and positioned there above. Housing 37 has a reduced upper portion which extends up to the slide member 10 and, in the position shown in Figure 2 surrounds the delayed firing pin 14. A beveled lower surface formed on housing 37 abuts a correspondingly beveled surface at the upper end of housing 32. Spring 35 has the effect of urging blocking members 36 against the inner wall of housing 37 to restrain it from unintentional displacement.
A locking bolt 38 is located in fuse head 2, extending perpendicular to the fuse axis and being formed with a groove 44 in its front surface. By engagement with an appropriate tool locking bolt 38 can be rotated to two positions. Bolt 38 is provided with a bore 39 through which the impact firing pin 5 extends. In the first position of the locking bolt, intended for immediate detonation, firing pin 5 is free to move through the bolt as shown in Figure 1.
In the second position of bolt 38, which is displaced by a 90 rotation from the first position, firing pin 5 is blocked by its surface 40 abutting on the edge of aperture 39 to secure it against displacement.
As shown in Figure 3 the slide member 10 has an aperture 41 through which the delayed firing pin 14 can impact I
on the second primer capsule 13. Such impact is possible provided the slide member is displaced by an amount "a"
as shown in Figure 3. As can be seen from Figure 4 the guide member 11 is formed with a chamber 43 which can couple the ignition of primer capsule 13 to primer capsule 12 so that ignition of one ignites the other. The extent of chamber 43 is shown in Figure 3 by means of chain dotted lines.
According to a further embodiment of the present invention, also outlined in Figure 3, an additional primer capsule aye may be positioned, beside the second primer capsule 13 in the guide member 11. A further delayed firing pin aye, not shown but identical to delayed firing pin 14, is provided for movement to impact on this additional primer capsule. This arrangement has the advantage that it is us-likely that both delayed firing pins will misfire at the same time so that more reliable ignition is obtained.
The operation of the percussion fuse of this invention will now be described. Before the launching of the projectile the slide member 10 is in the safety position and retained there by locking member 18. When the projectile is fired, bolt 23 is urged downwardly by the acceleration and, subsequently, locking member 18 also moves downwardly. Locking member 18 is retained in the downward position at the end of the acceleration phase by means of bolt 23 which moves up-warmly to urge ball bearings 21 outwardly so that -they engage a shoulder 42 in bore 19 and prevent the return upward movement of locking member 18.
If locking bolt 38 has been set to provide detonation oh/
I
on impact then impact head moves downwardly during the launch acceleration phase thereby moving firing pin 5 downwardly against the restoring force of spring 6. The tip of firing pin 5 extends into the blind bore l'; in the slide member and is protected from deformation. After the projectile leaves the weapon and the acceleration phase is finished spring 6 causes the firing pin to move upwardly to the position shown in Figure 1.
Slide member 10 is released by removal of the firing pin and the locking member and moves from its safety position to the firing position urged there by spring 16.
This displacement is con-trolled by the delay mechanism giving the necessary protection against premature detonation.
When slide member 10 reaches the firing position firing pin 5 is aligned with the first primer capsule 12.
On impact of the projectile firing pin 5 impacts on primer capsule 12 which ignites the booster charge 3 through the fuse path 28. This in turn ignites the explosive charge of the projectile, which is not shown in the drawings.
If locking bolt 38 is set to the position for delayed firing then firing pin 5 is held away from slide member 10. after locking member 18 has been retracted, as discussed above, slide member 10 can move into the firing position in the manner previously described. When the projectile impacts on the target both members 32 and 37 move forward due to their inertia and despite the restraining force of blocking members 36. The forward movement of members 32 and 37 is blocked by slide member 10 so that spring 35 is it Jo compressed. When the appropriate delay has been achieved the restoring force of spring 35 urges member 32 downwardly so that the blocking members 36 move out from slot 31 into the space formed between members 32 and 37. This releases the delayed firing pin 14 which is moved upwardly by spring 35 to impact on primer capsule 13. Primer capsule 13 can then ignite primer capsule 12 via chamber 43 again leading to ignition of the booster charge 3.
if, due to a malfunction, the shell remains unexploded then it is necessary to be able to disarm the fuse. Such an exploded shell can result if, unexpectedly, it strikes a closely located object while the mechanism is still in the safety position. Alternatively, it may be that the delay mechanism 9 does not function and that slide member lo does not move at all or its only partially displaced.
If slide member 10 is moved the amount "a" shown in Figure 3 then primer capsule 13 will have been impacted by delayed firing pin 14 thereby sequentially igniting primer capsule 12. This may not, however, lead to detonation of the shell because primer capsule 12 on slide member lo may still be too far away from the fuse path 28 to ignite it. Stationary primer capsule 13 cannot, of course, directly ignite fuse path 28. Thus an unexploded shell results because -the two primer capsules 12 and 13 have been detonated but the booster charge 3 has not been ignited through fuse bore 28.
Another situation which may result in an unexploded shell is if the impact firing pin 5 is restrained by locking bolt 38 and the delay firing pin 14 does not impact on primer g oh/
us capsule 13. This results in a dangerous situation. It can be obviated, as discussed above, by providing the second delayed firing pin aye which ignites the further primer capsule aye and hence, primer capsules 12 and 13. Thus, even if the first delayed firing pin malfunctions it is still possible to detonate the projectile or if required deactivate the fuse. It is advantageous to position the three primer capsules 12, 13 and aye and chamber 43 so that when any one of the capsules is ignited the other two will also fire.
oh/
Percussion fuses of this type are shown in Swiss Patent 360,927 and German Patent 1,120,940. These patents show fuse mechanisms in which both primer capsules are located in the carrier member. A second firing pin can only impact on the second primer capsule after a delay period whereupon the second firing pin is moved against the capsule by a prestressed spring. The displacement of the carrier is controlled by a delay mechanism consisting of a gear train and spring arrangements. The carrier is moved from its safety position to its firing position by spring forces. Ignition of one or other of the primer capsules can only be achieved when the carrier has been pushed completely to the firing position because only at that point can the tip of the firing pin impact the primer capsule.
A disadvantage of such known fuses is that an unexploded shell can be dangerous because there are two prestressed springs in the fuse. One of the springs, for example that moving the carrier member, could subsequently move it to the firing position and the other spring could then subsequently actuate the second firing pin. Even without the second spring the weight of the firing pin might be .
~2~?6~
sufficient to cause it to impact on the second primer capsule and detonate it even with only inertial force.
The requirements for a fuse include:
(a) high reliability - -that is, even under unfavorable conditions the fuse should detonate reliably;
(b) high safety factor with unexploded shells, -that is, rough handling should not be able subsequently to detonate an unexploded shell.
The present invention seeks to provide a percussion fuse with a high safety factor with unexploded shells and at the same time having high reliability.
The present invention relates to a percussion fuse for a projectile comprising a fuse housing containing two primer capsules, a firing pin adapted to be displaced to impact on one of the capsules after impact of the projectile on a target, a carrier movable between a safety position and a firing position and carrying one of the primer capsules, the other primer capsule being located in the fuse housing spaced from the main ignition path, the carrier defining an opening through which the firing pin can move to impact on the other primer capsule.
To maintain the same degree of safety during transport and loading then the first primer capsule should preferably be located when in the firing position between a fuse path and the second primer capsule so that ignition of the second primer capsule does result in ignition of the fuse path. To improve the probability that the shell will function reliably a third primer capsule can be positioned in the fuse casing with a third delayed firing pin to impact on it.
` - 2 -Embodiments of the invention will now be described in conjunction with the following drawings in which:
Figure 1 is longitudinal section through a percussion fuse in accordance with the present invention;
Figure 2 is a section along the line II-II shown in Figure l;
Figure 3 is a section along the line III-III
shown in Figure l; and Figure 4 is a section along the line IV-IV shown in Figure 3 which gives enlarged detail from that shown in Figure 2.
or Referring now to Figure 1, fuse head 2 is shown thread ably attached to the forward section of a fuse housing 1 having a booster charge 3 thread ably attached to the rear thereof. An impact head 4 is displaceable mounted on the fuse head and carries a firing pin 5 which is used when detonation of the fuse immediately on impact is required. A
spring 6 extends between the impact head 4 and a guide bearing 7 received in the fuse head and urges the firing pin upwardly. A casing 8 contains a spring-biased, trays-tersely movable, slide member 10 which carries a primer capsule (12). The slide member has a safety position which avoids premature detonation of the fuse and is movable to a firing position under the control of a delay mechanism 9.
Slide member 10 is mounted for transverse movement in a rectangular groove formed in a guide member 11. Slide member 10 contains a primer capsule 12 to be impacted by the firing pin 5 and, as can be seen in Figure 2 the guide member 11 contains a second primer capsule 13 which can be impacted from underneath by a delay firing pin 14. Figure 3 demonstrates the relative positioll of the two primer capsules 12 and 13 with respect to the axis of the fuse head.
A blind bore 15 is provided on the slide member 10 and, in the safety position, is located on the axis of the fuse head. A spring 16 (Figure 3) positioned in a transverse bore in the slide member 10 has one side on the slide member and the other on a guide pin 17 -to urge the slide member towards the firing position. Such movement is prevented before firing by the provision of a locking member 18 carried oh in a longitudinal bore 19 of the fuse housing. Member 18 is urged into a blocking position by spring 20 and in that position prevents transverse movement of the slide member.
Locking member 18 is retained in its locking piston by ball bearings 20 which engage with an annular slot 22 in a bore formed in housing 19. The ball bearings are retained in this position by a bolt 23 movable inside locking member 18. A spring 24 urges bolt 23 into this locking position.
Slide member 10 is formed with a rack 25 cooperating with a pinion 26 carried in the guide member 11. Pinion 26 is, in turn, driven by an oscillating mass, not shown, through gear train 27. This assembly forms the delay messianism 9 which postpones movement of the slide member 10 from the safety position thereby ensuring against premature detonation. Fuse housing 1 is provided with a bore 28 containing primer material and forming a fuse path extending from the undersurface of the slide member 10 to a booster charge 3.
The mechanism for the delayed ignition firing pin is contained in a further bore 29 (Figure 2) located parallel to the bore containing the primer train. Bore 29 contains a cylinder 30 attached thereto at its lower end. The upper end of cylinder 30 has a circumferential, annular slot 31 and projects into a bore of firing pin 14. A housing 32 is movable in bore 29 and surrounds the cylinder 30. In its inactive position housing 32 rests on the base 33 of cylinder 30. A spring 35 is provided having one end resting on a shoulder 34 of housing 32 and the other abutting on the lower ;
end of delayed firing pin 14. Firing pin 14 is restrained from upward movement by blocking members 36 contained in the circumferential annular slot of cylinder 30. These blocking members extend into radial bores formed on the lower end of firing pin 14 and rest against. the inner wall of a housing 37 which is of the same diameter as housing 32 and positioned there above. Housing 37 has a reduced upper portion which extends up to the slide member 10 and, in the position shown in Figure 2 surrounds the delayed firing pin 14. A beveled lower surface formed on housing 37 abuts a correspondingly beveled surface at the upper end of housing 32. Spring 35 has the effect of urging blocking members 36 against the inner wall of housing 37 to restrain it from unintentional displacement.
A locking bolt 38 is located in fuse head 2, extending perpendicular to the fuse axis and being formed with a groove 44 in its front surface. By engagement with an appropriate tool locking bolt 38 can be rotated to two positions. Bolt 38 is provided with a bore 39 through which the impact firing pin 5 extends. In the first position of the locking bolt, intended for immediate detonation, firing pin 5 is free to move through the bolt as shown in Figure 1.
In the second position of bolt 38, which is displaced by a 90 rotation from the first position, firing pin 5 is blocked by its surface 40 abutting on the edge of aperture 39 to secure it against displacement.
As shown in Figure 3 the slide member 10 has an aperture 41 through which the delayed firing pin 14 can impact I
on the second primer capsule 13. Such impact is possible provided the slide member is displaced by an amount "a"
as shown in Figure 3. As can be seen from Figure 4 the guide member 11 is formed with a chamber 43 which can couple the ignition of primer capsule 13 to primer capsule 12 so that ignition of one ignites the other. The extent of chamber 43 is shown in Figure 3 by means of chain dotted lines.
According to a further embodiment of the present invention, also outlined in Figure 3, an additional primer capsule aye may be positioned, beside the second primer capsule 13 in the guide member 11. A further delayed firing pin aye, not shown but identical to delayed firing pin 14, is provided for movement to impact on this additional primer capsule. This arrangement has the advantage that it is us-likely that both delayed firing pins will misfire at the same time so that more reliable ignition is obtained.
The operation of the percussion fuse of this invention will now be described. Before the launching of the projectile the slide member 10 is in the safety position and retained there by locking member 18. When the projectile is fired, bolt 23 is urged downwardly by the acceleration and, subsequently, locking member 18 also moves downwardly. Locking member 18 is retained in the downward position at the end of the acceleration phase by means of bolt 23 which moves up-warmly to urge ball bearings 21 outwardly so that -they engage a shoulder 42 in bore 19 and prevent the return upward movement of locking member 18.
If locking bolt 38 has been set to provide detonation oh/
I
on impact then impact head moves downwardly during the launch acceleration phase thereby moving firing pin 5 downwardly against the restoring force of spring 6. The tip of firing pin 5 extends into the blind bore l'; in the slide member and is protected from deformation. After the projectile leaves the weapon and the acceleration phase is finished spring 6 causes the firing pin to move upwardly to the position shown in Figure 1.
Slide member 10 is released by removal of the firing pin and the locking member and moves from its safety position to the firing position urged there by spring 16.
This displacement is con-trolled by the delay mechanism giving the necessary protection against premature detonation.
When slide member 10 reaches the firing position firing pin 5 is aligned with the first primer capsule 12.
On impact of the projectile firing pin 5 impacts on primer capsule 12 which ignites the booster charge 3 through the fuse path 28. This in turn ignites the explosive charge of the projectile, which is not shown in the drawings.
If locking bolt 38 is set to the position for delayed firing then firing pin 5 is held away from slide member 10. after locking member 18 has been retracted, as discussed above, slide member 10 can move into the firing position in the manner previously described. When the projectile impacts on the target both members 32 and 37 move forward due to their inertia and despite the restraining force of blocking members 36. The forward movement of members 32 and 37 is blocked by slide member 10 so that spring 35 is it Jo compressed. When the appropriate delay has been achieved the restoring force of spring 35 urges member 32 downwardly so that the blocking members 36 move out from slot 31 into the space formed between members 32 and 37. This releases the delayed firing pin 14 which is moved upwardly by spring 35 to impact on primer capsule 13. Primer capsule 13 can then ignite primer capsule 12 via chamber 43 again leading to ignition of the booster charge 3.
if, due to a malfunction, the shell remains unexploded then it is necessary to be able to disarm the fuse. Such an exploded shell can result if, unexpectedly, it strikes a closely located object while the mechanism is still in the safety position. Alternatively, it may be that the delay mechanism 9 does not function and that slide member lo does not move at all or its only partially displaced.
If slide member 10 is moved the amount "a" shown in Figure 3 then primer capsule 13 will have been impacted by delayed firing pin 14 thereby sequentially igniting primer capsule 12. This may not, however, lead to detonation of the shell because primer capsule 12 on slide member lo may still be too far away from the fuse path 28 to ignite it. Stationary primer capsule 13 cannot, of course, directly ignite fuse path 28. Thus an unexploded shell results because -the two primer capsules 12 and 13 have been detonated but the booster charge 3 has not been ignited through fuse bore 28.
Another situation which may result in an unexploded shell is if the impact firing pin 5 is restrained by locking bolt 38 and the delay firing pin 14 does not impact on primer g oh/
us capsule 13. This results in a dangerous situation. It can be obviated, as discussed above, by providing the second delayed firing pin aye which ignites the further primer capsule aye and hence, primer capsules 12 and 13. Thus, even if the first delayed firing pin malfunctions it is still possible to detonate the projectile or if required deactivate the fuse. It is advantageous to position the three primer capsules 12, 13 and aye and chamber 43 so that when any one of the capsules is ignited the other two will also fire.
oh/
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A percussion fuse for a projectile comprising a fuse housing (1) containing two primer capsules (12, 13), a firing pin (14) adapted to be displaced to impact on one of said capsules (13) after impact of the projectile on a target, a carrier (10) movable between a safety position and a firing position and carrying one (12) of said primer capsules, the other (13) primer capsule being located in the fuse housing spaced from the main ignition path, the carrier (10) defining an opening (41) through which the firing pin (14) can move to impact on said other primer capsule (13).
2. A percussion fuse as set out in claim 1 wherein in the firing position of the carrier the primer capsule (12) carried by the carrier (10) is positioned intermediate a fuse path (28) and the other primer capsule (13) located in the fuse housing, whereby detonation of the last mentioned primer capsule (13) results in ignition of the fuse path (28) without detonation by impact of the primer capsule (12) on the carrier (10).
3. A percussion fuse as set out in claim 2 wherein the fuse housing has a chamber (43) adapted to couple ignition between the primer capsules (12, 13) when the carrier is in the firing position.
4. A percussion fuse as set out in claim 1 including two firing pins, a first firing pin (5) displaceable immediately on impact of the projectile to impact on the primer capsule (12) carried by the carrier (10), the second firing pin (14) being actuable with a delay after impact of the projectile to impact on the stationary primer capsule (13), said carrier (10) being a slide member.
5. A percussion fuse as set out in claim 4 further including a third primer capsule (13a) located in the fuse housing and a third firing pin (14a) adapted to impact on said third primer capsule.
6. A percussion fuse as set out in claim 5 wherein the stationary primer capsules (13, 13a) are adjacent so that detonation by impact of one ignites the other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH115284 | 1984-03-08 | ||
| CH1152/84-6 | 1984-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1227966A true CA1227966A (en) | 1987-10-13 |
Family
ID=4203692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000474567A Expired CA1227966A (en) | 1984-03-08 | 1985-02-18 | Percussion fuse |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0155449B1 (en) |
| CA (1) | CA1227966A (en) |
| DE (1) | DE3560324D1 (en) |
| NO (1) | NO850575L (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL236971A (en) * | 1958-03-28 | |||
| NL107545C (en) * | 1960-04-02 |
-
1985
- 1985-01-16 EP EP19850100414 patent/EP0155449B1/en not_active Expired
- 1985-01-16 DE DE8585100414T patent/DE3560324D1/en not_active Expired
- 1985-02-14 NO NO850575A patent/NO850575L/en unknown
- 1985-02-18 CA CA000474567A patent/CA1227966A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3560324D1 (en) | 1987-08-13 |
| NO850575L (en) | 1985-09-09 |
| EP0155449B1 (en) | 1987-07-08 |
| EP0155449A1 (en) | 1985-09-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |