. Healthy houses : a handbook to the history, defects, and remedies of drainage, ventilation, warming, and kindred subjects : with estimates for the best systems in use, and upward of three hundred illustrations . Fig. 209 represents a section down the centre of an improved self-acting turret with valves, made by Messrs. Billing and Co., HattonGarden London. A galvanized cylinder is made to contain two cones,one within the other, and to form a windguard and protector to thevalve, which is seen below, and which is composed of a number ofsmall mica doors, copper-hinged to a cast-iron framing. Ab
. Healthy houses : a handbook to the history, defects, and remedies of drainage, ventilation, warming, and kindred subjects : with estimates for the best systems in use, and upward of three hundred illustrations . Fig. 209 represents a section down the centre of an improved self-acting turret with valves, made by Messrs. Billing and Co., HattonGarden London. A galvanized cylinder is made to contain two cones,one within the other, and to form a windguard and protector to thevalve, which is seen below, and which is composed of a number ofsmall mica doors, copper-hinged to a cast-iron framing. Above thelower cone will be noticed an escape hole for the rain, so that no dis-agreeables of this sort can occur. The hot air rushes up the shaft from the room, and passes throughthe valves, finally reaching the atmosphere at the circular spacebetween the cones. They are largely used by the Government, and aremade to fit shafts of from 6in. to 20in. diameter. Another very goodturret ventilator is that drawn in elevation, and also in section at , and known as Boyles Patent, and manufactured by Messrs. The Archimedean Ventilators, 175 Comyn, Ching, and Co. Here, also, the valves are of mica. The chiefd
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Keywords: ., bookcentury1800, bookdecade1870, bookidhealthyhouse, bookyear1872
