Abstract: Described is signalling device for extinguishers or hydrants, comprising a first valve body connected to a tank of liquid and/or powder product to be dispensed, a second valve body connected to a hose equipped with a nozzle for dispensing product and a handle for activating the dispensing of the product equipped with a control lever; inside the handle is housed a safety plug shaped in such a way as to keep the control lever in an inactive position. The plug has, at a relative end portion, a magnet, which activates a sensor present on an electronic card located inside the control lever, designed to detect the presence of the plug. Moreover, the plug is made of transparent plastic material and at least one LED is positioned on a base facing a lower portion of the plug, in such a way that the LED produces a luminous emission which spreads for the entire plug, thereby operating as a luminous wave guide.

Abstract: A support structure for solar panels (100), comprising at least one solar panel (100) placed above a water basin and connected to a piston (1), which is fixed to the bottom at the water basin. The piston (1) is connected, on the side opposite to the bottom of the basin, to the solar panel (100) by means of a support bar or stem (10), which protrudes from the piston (1) and has first terminal elements (11) constrained to slide in respective side guides (20) of the solar panel (100). The solar panel (100) is hinged, at a lower edge (23), to a frame (9) which is integral with a hollow cylinder (3) installed about the piston (1) and slidably constrained to the piston (1) by second terminal elements (7) connected to the cylinder (3).