| 摘要 |
1325337 Double glazing SITELINES Inc 17 July 1970 [23 July 1969] 34799/70 Heading E1R [Also in Division F4] A building defining a substantially enclosed volume, whereby the temperature and pressure of the interior atmosphere of the building can be different from that of the outside air, is glazed with a plurality of double glazed sealed window units 12 the enclosed volumes within each of the window units being connected together by first air passage means 19, 21 providing communication with a body of hygroscopic material 25 and second air passage means 34 providing venting from the hygroscopic material to the outside air. Two drying towers 23, 24 may be provided for the hygroscopic material and connectable alternately between the passages 21, 34 (which contain respectively particle and dust filters 28, 34) by operation of two way, four port valves 26, 27 under the control of a timer 33 via connections 33a, 33b, a third connection 33c operating a blower to purge moisture to the outside air from the tower not in use. A dew point indicator 29 warns of introduction of moisture. |
