Improvements relating to ventilators
Реферат: 599,418. Ventilators. DAVIES, L. G. Nov. 14, 1945, No. 30484. [Class 137] [Also in Group XIII] A ventilator for controlling the direct entry of air from the outside to the inside of a building or structure comprises at least three similar and parallel spaced layers of baffles or louvres providing slots or other apertures which are defined by outwardly directed sharply upturned edges, the arrangement being such that there is no straight path for air or raindrops through the apertures of the ventilator. To prevent this straight path, an additional baffle 12 of similar form but reversed in position may be required, Fig. 3, or a set of baffles 46 of different form associated with one of the layers, Fig. 8, the apertures being staggered from layer to layer. In the form shown in Fig. 3, the layers comprise slotted plates spaced by integral flanged sides (not shown) and channel members 17 secured to the plates e.g. by welding. The slots 14 are staggered laterally in different layers and the surfaces between their upturned edges form channels for draining away moisture which finally escapes through a gap 18. These slots may be replaced by round holes staggered in two directions in different layers. The sharply upturned edges around the slots or holes are stated to provide an approximately constant air flow through the ventilator for varying wind pressure. An alternative form of ventilator is shown in Fig. 8, in which the apertures are formed by the gaps between separate channelled strips 41 supported and spaced apart by end brackets 44, 45. The ventilators can be used in walls or roofs, the one shown in Fig. 8 being used in a wall and having moisture escape holes 47 in the bottom, and may operate in pairs the one for admission the other for extraction of air. The channelled strips or plates may be made of metal, glass or plastics.
Improvements in and relating to the ventilation of enclosures
Номер патента: GB452280A. Автор: . Владелец: Haden Drysys International Ltd. Дата публикации: 1936-08-18.