| 摘要 |
<p>746,650. Springs. AKTIEBOLAGET SVENSKA FLAKTFABRIKEN. May 14, 1954 [May 16, 1953], No. 14198/54. Class 108 (3). [Also in Groups X and XXV] Spring elements as shown are used in a fastening device for securing a ventilating grille in an opening (see Groups X and XXV). Two elements are used and these are pivoted by lugs 5, 5<SP>1</SP> to the grille and the part 30 of each engages a groove in the opening so that as the grille is pushed into the opening the spring elements are compressed until the pivot points pass dead centre when they expand to hold the grille in the opening.</p> |
