| 摘要 |
<p>The invention concerns a timepiece (1) with an integrated true airspeed indicator, which comprises a case that is closed by a glass (5) and formed of a back cover (2) and a middle part (3); a time display (6); a bezel (7) comprising a rotatable part (8) with a circular first edge (9); a time keeping circuit (10) controlling the time display (6); and at least one energy source (11) powering the time-keeping circuit (10). One preferred embodiment of the timepiece according to the invention is characterized in that the bezel (7) comprises Flight Level (F.L.) marks and Mach Number (MACH) marks that are in each case directed radial to the first edge (9) of the rotatable part (8) of the bezel (7) and that are diametrically opposed to each other. The inventive timepiece (1) comprises an indicator ring (12) with a circular first edge (13) that is concentrically arranged with and that is located close to the first edge (9) of the rotatable part (8) of the bezel (7). The fixed indicator ring (12) comprises True Air Speed (K.T.A.S.) marks and Flight Level (F.L.) marks that are in each case directed radial to the first edge (13) of the indicator ring (12) and that are diametrically opposed to each other in such a way that the (F.L.) marks of the rotatable part (8) of the bezel (7) are located opposite the (K.T.A.S.) marks of the indicator ring (12) and that the (MACH NUMBER) marks of the rotatable part (8) of the bezel (7) are located opposite the (F.L.) marks of the indicator ring (12). Also disclosed are uses of the inventive timepiece for estimating the Mach number of an aircraft.</p> |
