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热词
    • 8. 发明授权
    • Fire and smoke ventilator
    • 消防通风机
    • US3738253A
    • 1973-06-12
    • US3738253D
    • 1971-11-24
    • WASCO PRODUCTS
    • JENTOFT A
    • E04D13/035E05F1/10F24F7/02
    • F24F7/02E04D13/0352E05F1/1075E05Y2900/154F24F11/34Y10T137/1797
    • A roof mounted fire and smoke ventilator includes a simplified mechanism for maintaining the cover closed and which also serves as a snubbing device to cushion the opening shock of the cover when the vent snaps open. The mechanism includes a simple arrangement of cables which are connected between the curb of the vent and the free end of the cover. The cover is spring biased toward an open position but is held closed by the cables by an arrangement including a fusible link which, when melted, releases the cables and enables the vent cover to snap open. Means also are provided to release the cables without destroying the fusible link, as might be desired when testing the operation of the vent.
    • 屋顶安装的防火和烟雾通​​风机包括用于将盖保持关闭的简化机构,并且还用作缓冲装置,以在通风口打开时缓冲盖的开启冲击。 该机构包括连接在通风路缘和盖的自由端之间的电缆的简单布置。 盖子被弹簧偏压到打开位置,但是通过包括可熔连接件的布置被电缆保持闭合,当熔化时释放电缆并使排气盖能够卡扣。 还提供了用于释放电缆而不破坏可熔连接件,这在测试通风口的操作时可能需要。