公开(公告)号：US4936287A

公开(公告)日：1990-06-26

申请号：US338003

申请日：1989-04-14

申请人： Andrew J. Hart ,  John Young

发明人： Andrew J. Hart ,  John Young

IPC分类号： A62C2/14 ,  A62C2/24 ,  F16K17/38

CPC分类号： A62C2/14 ,  A62C2/242 ,  F16K17/383 ,  Y10T137/1812 ,  Y10T137/1819

摘要： A fire damper or the like having butterfly-type gas flow control blades includes a heat responsive blade release assembly that incorporates a standard fusible link accessible from externally of the assembly. The fusible link holds together pivoted side plates of a housing from which extends a pair of arms normally holding the blades in their open positions. When the link melts, the side plates move apart, allowing the arms to open and release the blades. The assembly is also adjustable to vary the extent to which the blades open.

摘要翻译： 具有蝶式气体流量控制叶片的防火阀等包括热响应刀片释放组件，其包括可从组件外部进入的标准可熔链。 可熔连接件将壳体的枢转的侧板保持在一起，一对臂通常将刀片保持在其打开位置。 当连杆熔化时，侧板移开，允许臂打开并释放叶片。 组件也是可调节的，以改变叶片打开的程度。

公开(公告)号：US4735100A

公开(公告)日：1988-04-05

申请号：US868088

申请日：1986-05-29

申请人： Ernest Hajto

发明人： Ernest Hajto

IPC分类号： G01F1/46

CPC分类号： G01F1/46

摘要： A sensor has two independent pressure chambers, each of which is in fluid communication through a plurality of relatively small passages to the flow within a duct; the passages for the first chamber being directed upstream, the passages for the second chamber being directed otherwise than upstream, usually downstream. The chambers are arranged so that their axes are parallel to each other, with the axis of the first chamber upstream of the axis of the second chamber. Depending upon the profile of the sensor, the dynamic pressure and changes therein are a constant multiplier function of the first chamber pressure minus static pressure. The constant multiplier is greater than 1.0, and is constant for a given sensor across a wide variation of measured pressures. When the profile of the sensor is essentially cruciform, with upwardly and downwardly extending wings, the multiplier effect may be in the order of 3.5 to 5.0, thereby permitting very low differential pressures to be detected and measured.

摘要翻译： 传感器具有两个独立的压力室，每个压力室通过多个相对小的通道流体连通到管道内的流动; 用于第一腔室的通道被引向上游，用于第二腔室的通道不是通向下游的上游。 这些室被布置成使得它们的轴彼此平行，第一室的轴线在第二室的轴线的上游。 根据传感器的轮廓，动态压力和其中的变化是第一室压力减去静压力的恒定乘数函数。 常数乘数大于1.0，并且对于给定的传感器在测量压力的宽变化范围内是恒定的。 当传感器的轮廓基本十字形时，具有向上和向下延伸的翼，倍增器效应可以在3.5至5.0的数量级，从而允许检测和测量非常低的压差。

公开(公告)号：US4763711A

公开(公告)日：1988-08-16

申请号：US870559

申请日：1986-06-04

申请人： Andrew J. Hart ,  Michael T. Nailor

发明人： Andrew J. Hart ,  Michael T. Nailor

IPC分类号： A62C2/16 ,  E05F15/20

CPC分类号： A62C2/16 ,  Y10T16/22

摘要： A fire damper having a temperature-sensitive link assembly designed to permit ease of maintenance of the damper. In one embodiment, the link assembly includes a fusible link that extends across and holds the blades folded. At each end, the link is coupled to a bracket embracing the blades by a pivot pin and an associated latch that is manually releaseable. During maintenance of the damper, either latch can be released and the link will then swing down about the pivot pin at the opposite end of the link, permitting the damper blades to close. In normal use, the blades will also close in response to an over-temperature condition causing the fusible link to break. In an alternative embodiment, a plain non-fusible link is used and one of the latches is released by a temperature-sensitive actuator made of memory metal.

摘要翻译： 具有温度敏感连杆组件的防火阻尼器，其设计成允许容易地维护阻尼器。 在一个实施例中，连杆组件包括延伸跨过并保持折叠的叶片的可熔连接件。 在每个端部，连杆通过枢轴销和相关联的闩锁联接到包围叶片的支架上，该闩锁可手动释放。 在维护阻尼器期间，可以释放闩锁，然后连杆将在连杆的相对端处围绕枢轴销摆动，允许风门叶片关闭。 在正常使用中，刀片还将响应于导致熔丝断裂的过热状况而关闭。 在替代实施例中，使用普通的非熔断连接件，并且其中一个闩锁由由存储金属制成的温度敏感致动器释放。

公开(公告)号：US4723481A

公开(公告)日：1988-02-09

申请号：US71008

申请日：1987-07-08

申请人： Andrew J. Hart ,  Michael T. Nailor

发明人： Andrew J. Hart ,  Michael T. Nailor

IPC分类号： F24F13/15 ,  E05F15/20

CPC分类号： F24F13/15

摘要： An air control damper is provided with an actuator coupled to a shaft for operating the blades of the damper. The actuator includes an electric drive motor that turns the shaft by way of a lever that is coupled to the shaft. The lever has a pulley at an outer end and a cable extends from the drive motor around the pulley and back to a fixed point adjacent the motor. When the motor is operated, the cable is wound around the motor drive shaft, pulling the lever towards the motor and turning the shaft. The arrangement provides a mechanical advantage in transmitting the motor output force to the blade actuating shaft.

摘要翻译： 空气调节阻尼器设置有联接到轴的致动器，用于操作阻尼器的叶片。 致动器包括电动驱动马达，其通过联接到轴的杠杆转动轴。 杠杆在外端具有滑轮，并且电缆从驱动马达围绕滑轮延伸并返回到与马达相邻的固定点。 当电机运行时，电缆缠绕在电机驱动轴上，将电机拉向电机并转动轴。 该装置提供了将马达输出力传递到叶片驱动轴的机械优点。