. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1950.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 15 blowinjj in air at the bottom, the same result may be obtained by exhaustion from the top or funnel mouth, tlie outer space of which must be inclosed and connected w ith some suitable exhaust appa- ratus, and in which case the annular chest at the bottom will be dispensed with, and free vent given for the ingress of air. IRON CASKS OR VESSELS. Solomon Isbael Da Costa, of Great St. Helens, city of London, civil engineer, fo
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1950.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 15 blowinjj in air at the bottom, the same result may be obtained by exhaustion from the top or funnel mouth, tlie outer space of which must be inclosed and connected w ith some suitable exhaust appa- ratus, and in which case the annular chest at the bottom will be dispensed with, and free vent given for the ingress of air. IRON CASKS OR VESSELS. Solomon Isbael Da Costa, of Great St. Helens, city of London, civil engineer, for 'â 'â improvenientu in vessels for holilingsolidKorfuids^ and in macliinerii for manufacturing siivh ';âGranted May 22; linroUed November 21, 18+9. [Reported in the Patent Journal.'] This invention relatesâfirst, to an improved mode of construct- ing barrel-shaped vessels of iron, and also to machinery used in the construction of such vessels. In the manufacture of these vessels the patentee forms the body part by bending the plate or sheet iron by means of rollers, some- what similar to plate-bending rollers used for boiler purposes; the plate used being either such as will form either one-half of the vessel, or complete the entire circle. The upper bending or shaping roller, for this purpose, is formed of a barrel-shape (that is, larger at the centre than at the ends), more or less, according to the shape to be given to the plate, while the under roller is the reverse of the upper, so as to receive it and squeeze the ])late between them. On the ends of the upper roller are two cutting discs, or edges, which pare the edges of the plate as it is passed between the rollers. A third roller is employed to guide and give the direction to the plate under operation, its proximity to and position with regard to the other rollers being adjustable for the purpose of bending the plate, more or less, according to the size of the vessel to be made, as well understood in
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