Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . and tlie violent ringing of a bell will wainthe sleeper of his danger. Van der Weydes burglar-alarm B is so arrangedthat the opening of a door or window to which it isconnected \\ill turn a gas-cock and emit gas into acylinder, where it is exploded by contact with asmall, constant burner above. It has an upper metallic cylinder and a lowerapron of wire gauze, in
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . and tlie violent ringing of a bell will wainthe sleeper of his danger. Van der Weydes burglar-alarm B is so arrangedthat the opening of a door or window to which it isconnected \\ill turn a gas-cock and emit gas into acylinder, where it is exploded by contact with asmall, constant burner above. It has an upper metallic cylinder and a lowerapron of wire gauze, into which the gas enters as thelower gas-cock is turned by the opening of the the gas readies tlie upjier end of the tube and isignited at the burner, it produces a shrill soundwhich may be heard by the inmates of tlie apiiaratns may be placed within the room whichis being surreptitiously entered, or at any other]ioint, connected liy wire with the door of saidroom, and conveniently situated to alarm the cbaige. Gasa-lier. A .stem or dependent tube having agroup of blanches tipped with gas-burners. Gas-appa-ratus. The apparatus for makingnitrous-oxide gas is shown in Fig. 2163. It consists Fig. Nitrous-Oxide Gas-Apparatus. of a retort n, purifier y/, and gas-holder b. Thepurifier A is a cop]ier cylinder, divided into twochambers by a gas-tight horizontal disk I/. Thecylinder is pierced just below the disk bj a numberof small boles. 7? is a wooden .stand ; C, a glassvase covering the cylindei ; A, a short pipe, towhich the conducting tube is attached, curvingunder the vase, and passing into the Jower chamberand connecting with the retort by a rubber tube similar pipe communicates with the upper cham-ber, and is connected with the gas-holder by tube cylinder is loosely fitted with four wire-clothdisks /, placed equidistant, on which is spread lime. GAS-APPARATUS. 946 GAS-BURNER. The wliole a[ijiiir; .sits in a D, whichshiml
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
