| 摘要 |
<p>A laser beam display device (1) for aligning two points spaced apart from each other. In such a device a laser tube (7) is disposed inside a metal tubular supporting element (6) and in engagement therewith, spring rings (19, 20) being suitably interposed between the laser tube (7) and the tubular body (6) and closely adhering to the inner wall of the latter. Inside the tubular body (6) and at the ends thereof, provision is also made for some soft silicon-based separation material. What above is all contained, together with operating devices for the laser tube (7) and with an axially-centering device (9) for the issuing laser beam, within a hull (2) closed at the top by a cover (3) provided with a portion (4) susceptible of overturning and secured at its free end to the hull (2) itself in a removable manner.</p> |
