Abstract: The present invention relates to the field of conveyor(s), also known as belt transporters. In one form, the invention relates to conveyor(s) used in mines, quarries and/or ports which are typically hundreds of meters, or even kilometres long. In one particular aspect the present invention is suitable for use as applied to conveyor belts, parts and systems of a conveyor as well as methods of monitoring and communicating along conveyor(s). The invention relates to wear detection, systems and methods associated with wear detection.

Abstract: The present disclosure relates to the field of safety and warning devices, such as a system for zone entry warning. The present disclosure utilizes attaching a stretchable band to the worker enabling the warning of the worker that they are proximate a demarcated zone.

Abstract: The present invention relates to the field of conveyor(s), also known as belt transporters. In one form, the invention relates to conveyor(s) used in mines, quarries and/or ports which are typically hundreds of meters, or even kilometres long. In one particular aspect the present invention is suitable for use as applied to conveyor belts, parts and systems of a conveyor as well as methods of monitoring and communicating along conveyor(s). The invention relates to wear detection, systems and methods associated with wear detection.

Abstract: A directly heated cylindrical lanthanum boride cathode assembly is disclosed which minimizes generation of magnetic fields which would interfere with electron emission from the cathode. The cathode assembly comprises a lanthanum boride cylinder in electrical contact at one end with a central support shaft which functions as one electrode to carry current to the lanthanum boride cylinder and in electrical contact, at its opposite end with a second electrode which is coaxially position around the central support shaft so that magnetic fields generated by heater current flowing in one direction through the central support shaft are cancelled by an opposite magnetic field generated by current flowing through the lanthanum boride cylinder and the coaxial electrode in a direction opposite to the current flow in the central shaft.

Abstract: A large area directly heated lanthanum hexaboride (LaB.sub.6) cathode system (10) is disclosed. The system comprises a LaB.sub.6 cathode element (11) generally circular in shape about a central axis. The cathode element (11) has a head (21) with an upper substantially planar emission surface (23), and a lower downwardly and an intermediate body portion (26) which diminishes in cross-section from the head (21) towards the base (22) of the cathode element (11). A central rod (14) is connected to the base (22) of the cathode element (11) and extends along the central axis. Plural upstanding spring fingers (37) are urged against an outer peripheral contact surface (24) of the head end (21) to provide a mechanical and electrical connection to the cathode element (11).