| 摘要 |
<p>The invention relates to a device for indicating the sense of rotation of an electric motor. According to the invention, the sense indicator consists of a rotor (1) made of aluminium and having cut, on the surface, a spiral (9) filled with paint, a glass test tube (2), provided with a handle (3) made of plastic, inside thereof there is mounted the rotor (1), fastened at the upper end by a screw (4) provided with a notched bearing for points and fastened, in its turn, inside a plug (5), the sense of rotation of an electric motor being given by the sense of rotation of the spiral (9), monitored by means of a tiltable mirror (6) mounted by a screw articulation (7), on a ring (8) made of plastic, soldered on the exterior wall of the test tube (2).</p> |
