. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. ave an annular space b b between them, which is filled with water, andin which the floating gasometer a plays up and down. The water must stand above thecover of the inverted cylinder. a and b are the pipes for leading the gas in and an opening in the masonry upon which the gasometer apparatus rests, thespace c may be entered, in order to make any requisite repairs. The water cistern may also be sunk in the ground, and the sides made tight withhydraulic mortar, as is sho
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. ave an annular space b b between them, which is filled with water, andin which the floating gasometer a plays up and down. The water must stand above thecover of the inverted cylinder. a and b are the pipes for leading the gas in and an opening in the masonry upon which the gasometer apparatus rests, thespace c may be entered, in order to make any requisite repairs. The water cistern may also be sunk in the ground, and the sides made tight withhydraulic mortar, as is shown in fig. 488, and to make it answer with less water, a con-centric cylindrical mass of masonry may be built at a distance of 2 or 3 inches within it. Every large gasometer must be strengthened interiorly with cross iron rods, to stiffenboth its top and bottom. The top is supported by rods stretching obliquely down to GAS-LIGHT. the sides, and to the under ed?e an iron ring is attached, consisting of curved cast ironbars bolted together ; with which the oblique rods are connected by perpendicular ones. 489. Other vertical rods stretch directly from the top to the bottom edge. Upon the peripheryof the top, at the end of the rods, several rings are made fast, to which the gas-holderis suspended, by means of a common chain which runs over a pulley at the the other end of the chain tliere is a counterpoise, which takes oil the greater partof the weight of the gas-holder, leaving only so much as is requisite for the expulsion ofthe gas. The inner and outer surfaces of the gas-holder should be a few times rubbedover with hot tar, at a few days interval between each application. The pulley must bemade fast to a strong frame. If the water cistern be formed with masonry, the suspension of the gas-holder may bemade in the following way. a a, fig. 489, is a hollow cylinder of cast iron, standing upthrough the middle of the gasometer, and which is provided at either end with a
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
