Abstract: A lighting system includes a plurality of lighting devices and a control device. The plurality of lighting devices are installed in a facility. The control device controls the plurality of lighting devices. The control device controls lighting light projected by at least one lighting device, belonging to the plurality of lighting devices, into colored lighting light, of which a color is different from a color white, to give, upon acquiring information about an event in question, a sign depending on the event in question.

Abstract: An electric motor includes: a ring-shaped stator including a field coil; and a rotor holding a permanent magnet in a magnet holding portion on an outer circumference thereof in an exposed state and being supported to be rotatable about a rotary shaft core in an inner space of the stator, wherein the magnet holding portion is configured to have a magnet insertion portion and a pair of regulation bodies, and the permanent magnet is configured to include a cylindrical outer wall surface, a rear wall surface, a pair of side wall surfaces, and a pair of engaged surfaces.

Abstract: An electric motor includes: a ring-shaped stator including a field coil; and a rotor holding a permanent magnet in a magnet holding portion on an outer circumference thereof in an exposed state and being supported to be rotatable about a rotary shaft core in an inner space of the stator, wherein the magnet holding portion is configured to have a magnet insertion portion and a pair of regulation bodies, and the permanent magnet is configured to include a cylindrical outer wall surface, a rear wall surface, a pair of side wall surfaces, and a pair of engaged surfaces.

Abstract: This disclosure relates to a continuous excavator for use in open-pit mining, which comprises a self-propelled main frame, a rotating cutter drum supported by pivotal booms and having cutter bits on its outer periphery for excavating the ground material, and a scraper supported behind a lower portion of said drum which collects earth/rock material dug by the cutter bits. An upward conveyor is supported on the frame and slopes upwardly to convey up the earth/rock material from the scraper. Another pivotable conveyor is supported at one end on the frame below the upper end of the upward conveyor, and it is pivotable both horizontally and vertically in order to convey the earth/rock material from the upward conveyor out of the excavator to a desired location.