| 摘要 |
<p>The disclosed triangular danger signalling device (Fig.1) differs from signalling devices existing in the market in that it is comprised of a chamber made of flexible material and having a triangular shape (1) which includes an anti-return valve (3) to inflate it with air, so as to configure a turgid triangle of which one side is provided with means (6) which maintain the triangle stable in a plane close to the vertical, in order to counteract the action of the wind or like elements. Another main difference is its folding easiness so as to reduce the inflatable signalling device to a minimum space, resulting practically in a pocket model. Its front face is provided with two perceptible optical bands made of fluorescent and reflecting material so that the signalling device is seen day and night respectively, said material having special characteristics which facilitate the above-mentioned folding to a minimum thickness.</p> |
