A self-defense system includes a first sleeve retainably securing a deterrent item. A second sleeve is laterally coupled to the first sleeve and houses a knife. The knife has a handle and a tip. A closed portion of the second sleeve houses the knife handle. An open portion of the second sleeve flexibly covers the knife tip. A hand strap is laterally adjacent to the second sleeve and coupled to at least one of: the first sleeve and the second sleeve. The hand strap is sized and shaped to secure the self-defense system about a hand of a user.

A method for protection of inflight aircraft during approaching-to-landing and takeoff/climbout phases of flight against handheld laser attacks includes two different drone types: a skeining drone and a swarming drone. One or more skeining drones are deployed close to the aircraft and/or one or more swarming drones are deployed further from the aircraft and closer to the beam source. Prior to the aircraft's traversal of a determinable approach point, a plurality of swarming drones are pre-deployed in loitering mode or else launched, and are subsequently directed toward the reckoned source of a trained beam while skeining drones are pre-deployed in a patrol mode or else launched, and fly closer to the aircraft. The skein classically shields the cockpit by flying a controlled interference pattern roughly parallel to the aircraft flightpath while the swarm saturates one or more determined and dynamically redetermined regions athwart the beam source location.

The invention relates to an electronic ignition unit fora stun grenade, comprising at least one energy source, at least one igniter, at least one control device, wherein the electronic ignition device further comprises an igniter driver connected to the at least one energy source and to the at least one control device.

Examples herein describe systems and methods for securing an opening and disorienting an active shooter. A command device can send a deployment command to a zone in a building. In response, canopies in the zone can deploy a roll-up door made of Kevlar that electromagnetically locks shut. The canopies can include blindingly bright lights and deafening sirens that disorient the shooter. The doors can block off rooms or other areas of a school where children can huddle safely until the shooter is apprehended. Canopies without doors can also be used at some openings to disorient the shooter.

An elongated tubular body having a first tubular extension at one end and a second tubular extension at the opposite end. The first tubular extension has a high-intensity light source mounted therein and an opening with the light source being mounted to project a narrow, high intensity light beam through the opening. A cap has light transmitting material covering the opening. The elongated tubular body includes a power supply mounted therein, a switch mounted thereon, and circuitry connecting the switch to the power supply and the power supply to the light source. The switch can be actuated to activate the power supply to supply power to the light source.

The invention relates to an electronic ignition unit for a stun grenade, comprising at least one energy source, at least one igniter, at least one control device, wherein the electronic ignition device further comprises an igniter driver connected to the at least one energy source and to the at least one control device.

Disclosed herein are embodiments of a method for averting a danger. The method is performed by a control apparatus for an unmanned vehicle, and the method involves obtaining a plurality of pieces of sensor information. At least partially depending on the obtained pieces of sensor information it is determined whether a danger exists. If it is determined that a danger exists, then at least one averting measure for averting the danger is determined, and the at least one averting measure is performed or caused to be performed.

A method for protection of inflight aircraft during approaching-to-landing and takeoff/climbout phases of flight against handheld laser attacks includes two different drone types: a skeining drone and a swarming drone. One or more skeining drones are deployed close to the aircraft and/or one or more swarming drones are deployed further from the aircraft and closer to the beam source. Prior to the aircraft's traversal of a determinable approach point, a plurality of swarming drones are pre-deployed in loitering mode or else launched, and are subsequently directed toward the reckoned source of a trained beam while skeining drones are pre-deployed in a patrol mode or else launched, and fly closer to the aircraft. The skein classically shields the cockpit by flying a controlled interference pattern roughly parallel to the aircraft flightpath while the swarm saturates one or more determined and dynamically redetermined regions athwart the beam source location.

A wearable self-defense apparatus has a body portion configured to be worn on or around a body part and includes a one or more deterrent devices such as an audible deterrent, a light deterrent or a high voltage transmitter deterrent for deterring an attacker. A controller is configured to control one or more operations of the apparatus to allow activation of the one or more deterrents upon detection of an activation motion by a gesture detector. An alert message may be sent to one or more alert contacts via a wireless transmitter directly or through a wireless connection with a mobile device. A global positioning system may provide a location of the apparatus to an alert contact upon activation, and a call center may call the wearer of the apparatus to confirm their safety. The high voltage transmitter is configured to charge conductors to transmit high voltage to an attacker.

A visual impairment device includes a light source, a modulator, and a controller. The light source capable of generating two or more high intensity light beams having different peak wavelengths, wherein at least one of the light beams has a wavelength bandwidth of less than 100 nm. The modulator modulates the two or more beams of intense light to produce a spatial array comprising a first array of first light beams having a first peak wavelength and a second array of second light beams having a second peak wavelength different from the first wavelength. The controller includes control circuitry for controlling the light source, the modulator, or both. The spatial array is projected into a space such that a lateral distance of at least one first light beam to a second light beam is in a range of 40-110 mm within at least one area of the space.