DESCRIZIONE
Light signaling device (10) for the bow of a ship, comprising, within a tubular outer liner (11), a support rod (15) with multiple telescopically extensible/retractable stages (15.1. 15.2, 15.3), characterized in that each of said telescopically extensible/retractable stages (15.1, 15.2, 15.3) includes, respectively:
- a lead screw (13, 17, 20),
- a nut screw (14, 18, 21) engaged with helical fit with said lead screw,
- a corresponding telescopic tubular section (15.1, 15.2, 15.3) coaxial and connected, by means of respective support means (14.1, 18.1, 21.1), with respect to said nut screw (14, 18, 21) and which translates in the axial direction, integrally with said nut screw, when said lead screw is set in rotation, while it is prevented from rotating with the nut screw itself by means of linear guide means (16, 19, 22; 16.1, 19.1; 16.2, 19.2, 22.2);
in that said lead screws (13, 17, 20) are integral to one another in rotation and receive the motion from electrical gear-motor means by transmission means (12, 12.1) kinematically connected to one (13) of said lead screws, and in that said lead screws (13, 17, 20) are tubular, coaxial and provided with external thread. [Image Omitted]