| 摘要 |
<p>PCT No. PCT/FI83/00070 Sec. 371 Date Jul. 6, 1984 Sec. 102(e) Date Jul. 6, 1984 PCT Filed Nov. 11, 1983 PCT Pub. No. WO84/01907 PCT Pub. Date May 24, 1984.The control/fire damper (10) comprises a tubular shell (11) constituting a flow duct (12), a shaft (13) disposed within the flow duct (12) and carried by the shell (11), and a closing plate (14) mounted on the shaft (13), and which in the case of fire damper use continuously tends to close under the action of a spring (17). The control/fire damper (10) is provided with a clamping counterpart (15) attached to the closing plate (14) and with a clamping device (16) passing through the shell (11), which fixes the counterpart (15) steplessly in the position which is desired in each instance. The clamping device (16) consists of a clamping screw and, in fire damper use, of a member attached by fuse material to the end of the clamping screw.</p> |
