. Ingegnere americano e giornale ferroviario. E trovato in bridgework, nel azionamento dei rivetti di i a 1 in. Diametro attraverso spesse-esses di 5 o 6 in., che è stato meglio usare una barra semplice eformare una testa su entrambe le estremità allo stesso tempo. Sig. John Birkinbine : da quello che è stato detto avrebbe preservato gli attrezzi da Rust A. buon piano per conservanti di arrugginimento è la semplice preparazione impiegata dal Pro-Fessor Olmstead, del Yale College, per la conservazione dell'apparato scien-tificico, e che ha da tempo pubblicato per il bene genero, dccliniug per averla brevettata. E 'fatto da losino fusione togoth

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. American engineer and railroad journal . e found in bridgework, in driving rivets of i to 1 in. diameter through thick-nesses of 5 or 6 in., that it was best to use a plain bar andform a head on both ends at the same time. .Mr. John Birkinbine : From what has been said it would Preserving Tools from Rust.—A. good plan for preservingtools from rusting is the simple preparation employed by Pro-fessor Olmstead, of Yale College, for the preservation of scien-tific apparatus, and which he long ago published for the gen-eral good, dccliniug to have it patented. It is made by theslow melting together of six or eight parts of lard to one ofresin, stirring till cool. This remains semi-fluid, ready foruse, the resin preventing rancidity and supplying an air-tightfilm. Rubbed on a bright surface ever so thinly it protectsand preserves the polish effectually, and it can be wiped offnearly clean, if ever desired, as from a knife blade, or it maybe thinned with coal oil or benzine.—Royal Engineers Journal. PROJECTILE AND GEAR PRESSES.. 24-INCH GEAR PRESS, BUILT BY WATSON & STILLMAN seem that the most important feature—namely, the quality ofthe iron in the rivets, is often neglected in its considera-tion ; but in locomotive boiler and in bridge work, when-many lives are dependent upon it, it would seem that noth-ing but the best quality obtainable should be considered as fitfor use. Tfie United States Projectile Company, a portion of whosemachinery is illustrated in another column, is engaged notonly in the manufacture of rapid-fire, solid drawn projectilesof 4, 5, and 6 in. diameter for the United StatesGovernment, but also of gears and pinions forusage in certain places where the service is verysevere. We illustrate herewith two presseswhich were made for them by Messrs. ^Vatson& Stillmann, the hydraulic machinery manufac-turers of Mew York. The larger of the two presses shown has a cyl-inder 24 in. in diameter and 48 in. double-actingstroke, and the smaller have 10 in.

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• booksubjectrailroadengineering