| 摘要 |
<p>Improvement of a bi-elastic device, particularly reduced, for the elasticizing of ear-pieces for spectacles, essentially comprising one small box, combined as finished with the ear-piece by spot-welding and pre-assembled, in whose inside are housed at least two springs, said springs on one side being with their end in abutment on the small box, on the other side being positioned in abutment of the end of a tie-rod, whose shape is substantially 'L' like respect to which they are placed adjacent and parallel; while the opposite end of the same tie-rod, being external to the small box, is hingeable to a corresponding small front face provided on the frame of the spectacles.</p> |
