Abstract: Disclosed is a load-bearing structure for single-axis for tracking photovoltaic panels including: first and second support beams for photovoltaic panels, having a longitudinal axis; crosspieces fixing the photovoltaic panels to the first and second beams; support poles for the first and second beam, secured to the ground and having a hinge allowing rotation of the beams about their axis; a linear actuator with first and second ends, the first being hinged to one of the support poles of the first beam; first and second cranks associated respectively with the first and second beams, and imparting a rotation movement thereto; and a connecting rod between the first and second cranks. The second end of the linear actuator is hinged to the connecting rod, allowing simultaneous and coordinated movement of the first and second cranks and the consequent simultaneous and coordinated rotation of the first and second beam of the structure.

Abstract: Filling level meter (4) for membrane gasometer (1), including at least one accumulation chamber (C1) arranged for containing a gas, and an impermeable flexible membrane (2) capable of moving between two positions corresponding to the chamber being totally full and totally empty, wherein the meter (4) includes: an instrument (12) associated with a fixed element (3, 9), arranged for generating a signal of measurement of a physical value that can be correlated to the quantity of gas contained in the chamber (C1); elements for processing and displaying (5) the value of the quantity of gas corresponding to the generated signal; a filiform, flexible element (6) for connecting the instrument (12) and the membrane (2); the filiform, flexible element (6) including at least one portion constituted by an elastic member (7).

Abstract: Filling level meter (4) for membrane gasometer (1), including at least one accumulation chamber (C1) arranged for containing a gas, and an impermeable flexible membrane (2) capable of moving between two positions corresponding to the chamber being totally full and totally empty, wherein the meter (4) includes: an instrument (12) associated with a fixed element (3, 9), arranged for generating a signal of measurement of a physical value that can be correlated to the quantity of gas contained in the chamber (C1); elements for processing and displaying (5) the value of the quantity of gas corresponding to the generated signal; a filiform, flexible element (6) for connecting the instrument (12) and the membrane (2); the filiform, flexible element (6) including at least one portion constituted by an elastic member (7).

Abstract: Above-ground swimming pool, comprising at least one basin (1), consisting of a waterproof sheet (9) and of a supporting structure (2), further comprising an overflowing channel (3) contained in a space (V) of said supporting structure (2) defined between first support means, adjacent to said basin (1), and second support means, external to said first support means. The overflowing channel (3) may consists of an impermeable sheet (10) hooked to the supporting structure (2).