Abstract: A firearm obstructer (100) for obstructing a passage (200) between a chamber and a muzzle of a firearm. The firearm obstructer (100) has an arm (101) and a tapered region (105). The arm (101) moves relative to the tapered region (105) to transition the firearm obstructer (100) between locking and unlocking configurations. In the locking configuration, the firearm obstructer (100) engages with the passage (200) to hold the firearm obstructer 100 in place in the passage (200). The firearm obstructer (100) so positioned provides an obstruction in the passage (200). In the unlocking configuration, the firearm obstructer (100) is removable from the passage (200). A method of operating the same.

Abstract: A firearm obstructer (100) for obstructing a passage (200) between a chamber and a muzzle of a firearm. The firearm obstructer (100) has an arm (101) and a tapered region (105). The arm (101) moves relative to the tapered region (105) to transition the firearm obstructer (100) between locking and unlocking configurations. In the locking configuration, the firearm obstructer (100) engages with the passage (200) to hold the firearm obstructer 100 in place in the passage (200). The firearm obstructer (100) so positioned provides an obstruction in the passage (200). In the unlocking configuration,the firearm obstructer (100) is removable from the passage (200). A method of operating the same.

Abstract: A locking apparatus having a body, at least one arm and a tapered member; wherein relative movement between the arm and the tapered member extends the arm from the body. In use, the arm is arranged to press against a wall of a channel to hold the locking apparatus in place and prevent the opening of a roller shutter.

Abstract: A locking apparatus having a body, at least one arm and a tapered member; wherein relative movement between the arm and the tapered member extends the arm from the body. In use, the arm is arranged to press against a wall of a channel to hold the locking apparatus in place and prevent the opening of a roller shutter.

Abstract: This invention relates to a lighting accessory which may be worn by an individual that allows the user to variably direct the light emissions along an arc of approximately 180 degrees in front of and above the user. Once the light is positioned, it can be operated hands-free. The apparatus is self-contained having a housing comprised of two members hingedly connected together. When the housing is opened by rotating one member about the common hinge axis relative to the other housing member, the internal light switch is triggered to activate the light source. The switch is operably responsive to the relative positions of the housing members, disengaging the light source from the power source when the members are closed and engaging the light source to the power source when the housing unit is open.

Abstract: An interactive display having an array of independently labelled display elements such as LEDs. The output of a recirculating shift register is supplied as long or short pulses which are scanned across the array. Each element in response emits either long flashes and appears lit or short flashes and appears unlit. A light-pen, when pointed at an element, detects the flash from that element, and causes a bit of the opposite sense to be introduced into the shift register in place of the recirculated bit. The display state of each element can thus be changed, both from lit to unlit or vice versa. The contents of the shift register can also be transferred to exterior equipment or supplied by it, allowing the display to act as an input/out device.

Abstract: A process is disclosed for indexing and retrieving information items recorded on a media and each given an index number. The process uses a criteria recorder having, for each value of a retrieval criterion, a recording position capable of holding a single bit. For each item the recorder is set according to the characteristics of the item and the resulting binary pattern recorded as a train of bits, together with the corresponding index number, on a magnetic index tape. To retrieve items meeting specified retrieval criteria, an electronic register is set with the bit pattern corresponding to those criteria, the tape searched for matching patterns, and the corresponding index numbers displayed as a guide to retrieving the actual items.