Device for the protection of targets against projectiles

Claim 2

In a device for protecting a target from attack by a projectile the combination comprising a linear shaped charge to generate a jet sheet of high velocity particles, the plane of symmetry of said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, a detonator to initiate explosion of said shaped charge, a source of electrical energy to fire said detonator, and a switch responsive upon impact of said projectile to establish connection between said source of electrical energy and said detonator said switch comprising a plurality of plates disposed in parallel planes and distortable by said projectile impact.

Claim 3

In a device for protecting a target from attack by a projectile the combination comprising a plurality of linear shaped charges to generate a jet sheet of high velocity particles, the plane of symmetry of one said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, the other said shaped charges having their respective longitudinal axes of symmetry disposed in said plane and forming obtuse angles with the axis of said one shaped Charge, a detonator to explode each said shaped charge, a source of electrical energy to fire said detonators, and a sequence switch responsive to successive projectile arrivals to connect said source of electrical energy to successive detonators.

Claim 4

In a device for protecting a target from attack by a projectile the combination comprising a plurality of linear shaped charges to generate a jet sheet of high velocity particles, the plane of symmetry of one said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, the other said shaped charges having their respective longitudinal axes of symmetry disposed in said plane and forming obtuse angles with the axis of said one shaped Charge, a detonator to explode each said shaped charge, a source of electrical energy to fire said detonators, and a sequence switch responsive to successive projectile arrivals to connect said source of electrical energy to successive detonators.

Claim 5

In a device for protecting a target from attack by a projectile the combination comprising a linear shaped charge to generate a jet sheet of high velocity particles, the plane of symmetry of said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, a detonator to initiate explosion of said shaped charge, a source of electrical energy to fire said detonator and means responsive to presence of the projectile to connect said source of electrical energy to said detonator, said means comprising a trigger screen, a source of alternating energy to energize said screen, said screen forming one arm of a normally balanced Wheatstone bridge, a vacuum tube connect to said bridge and responsive to bridge unbalance to connect said source of electrical energy to said detonator, said projectile acting to vary the inductance of said trigger screen to unbalance said bridge.

Claim 6

In a device for protecting a target from attack by a projectile the combination comprising a linear shaped charge to generate a jet sheet of high velocity particles, the plane of symmetry of said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, a detonator to initiate explosion of said shaped charge, a source of electrical energy to fire said detonator and means responsive to presence of the projectile to connect said source of electrical energy to said detonator, said means comprising a trigger screen, a source of alternating energy to energize said screen, said screen forming one arm of a normally balanced Wheatstone bridge, a vacuum tube connect to said bridge and responsive to bridge unbalance to connect said source of electrical energy to said detonator, said projectile acting to vary the inductance of said trigger screen to unbalance said bridge.

Claim 7

In a device for protecting a target from attack by a projectile the combination comprising a linear shaped charge to generate a jet sheet of high velocity particles, the plane of symmetry of said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, a detonator to initiate explosion of said shaped charge, a source of electrical energy to fire said detonator, and means responsive to presence of the projectile to connect said source of electrical energy to said detonator, said means comprising a photoelectrically sensitive screen, a source of light directed toward said screen and a vacuum tube normally cut off and responsive to partial interruption of light by the projectile to connect said source of electrical energy with said detonator.

Claim 8

In a device for protecting a target from attack by a projectile the combination comprising a linear shaped charge to generate a jet sheet of high velocity particles, the plane of symmetry of said shaped charge disposed in spaced relation to said target and substantially at right angles to the projectile trajectory, a detonator to initiate explosion of said shaped charge, a source of electrical energy to fire said detonator, and means responsive to presence of the projectile to connect said source of electrical energy to said detonator, said means comprising a photoelectrically sensitive screen, a source of light directed toward said screen and a vacuum tube normally cut off and responsive to partial interruption of light by the projectile to connect said source of electrical energy with said detonator.

Claim 9

In a device for the defence of a target from an attacking projectile, a trigger screen comprising a pair of spaced parallel, insulated plates mounted at the side of said target, a linear shaped charge having its length substantially equal to the length of said screen, said charge adapted to generate a jet sheet of high velocity particles, its plane of symmetry being disposed in spaced relation to said target and substantially at right angles to the trajectory of said attacking projectile, a detonator, a source of electrical energy, and an arming switch adapted to establish electrical connection between said screen, said electrical energy source and said detonator to arm said device for exploding said shaped charge upon collision with said screen by said attacking projectile.

Claim 10

In a device for the defence of a target from an attacking projectile, a trigger screen comprising a pair of spaced parallel, insulated plates mounted at the side of said target, a linear shaped charge having its length substantially equal to the length of said screen, said charge adapted to generate a jet sheet of high velocity particles, its plane of symmetry being disposed in spaced relation to said target and substantially at right angles to the trajectory of said attacking projectile, a detonator, a source of electrical energy, and an arming switch adapted to establish electrical connection between said screen, said electrical energy source and said detonator to arm said device for exploding said shaped charge upon collision with said screen by said attacking projectile.