| 摘要 |
1448428 Fume cabinets HERMANN WALDNER KG 10 Jan 1975 [2 Oct 1974] 1091/75 Heading F4X [Also in Division E2] A suspended vertical sliding window 2 of a laboratory fume cupboard is protected from falling freely in the event of a failure of the suspension cable 3 by means of a slidable plunger 18 having a cam surface 24 held against the action of a spring 22 by the cable 3 and a transverse slidable pin 25 engageable by the cam surface to move transversely into a locking aperture 27 in the window guide 5, 6. The plunger and locking pin are located in sliding blocks 7 on opposite edges of the window, the blocks being rigidly interconnected by means of strip 10. |
