| 摘要 |
<p>The device (1) has a locking unit (4) which holds a piercing piston (3) for a compressed air cartridge (6) in its locked position. The device comprises a thermo fuse (8) which breaks when a critical temperature is exceeded and which is supported, at one end, on a longitudinally movable locking rod member (5) which is in operational communication with the piercing piston (3). An L-shaped clamp (11) which engages with an arm (13) opening (19) over the fuse (8) has a central longitudinal plane inclined to the vertical (18) and supports the other end of the fuse (8). The arm (13) is provided with a predetermined bending point (21) in the region of its connection (20) to the housing (7) of the locking unit (4) to allow the arm to bend or shear off if the cartridge (6) happens to be heated sufficiently due to failure of the fuse, to break its rupture disc and exert a force on the locking rod member (5), thus enabling the piercing piston (3) to be activated.</p> |
