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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
d add powdered chalk. b. Ure's glue (dissolved), 8; linseed-oil, boiled to varnish with litharge, 4. c. Dissolved glue, 4; Venice turpentine, 1. d. (Waterproof.) Dissolve isinglass, 2 ounces, in a pint of milk, and boil to a consistence. e. Glue swelled in cold water and digested in linseed-oil is tenacious, and acquires the quality of resisting moisture. Red lead may be added. f. Marine glue; shellac and caoutchouc dissolved in separate portions of naphtha, and mixed. g. Spalding's liquid glue; glue and acetic acid. granite. Gum-dammar, marble-dust, felspar. The mineral ingredients are reduced to an impalpa- ble powder, and the mass is incorporated by gradual heating. It is applied warm to the warmed faces of the fractured portions. The black felspar is preferably used, to prevent the detection of the joint. hard. a. Dried and pulverized clay, 8; clean iron-filings, 4; peroxyde of manganese, 2; sea-salt, 1; borax, 1. Triturate, reduce to paste with water,
Knight's Mechanical Encyclopedia (ed. Knight), D. (search)
g by a cock. This also allowed the bell to be completely filled with air, rendering the whole of its interior space available. Halley also invented a waterproof cap to which pipes leading to the bell were attached, so that an operator could leave the bell and walk on the bottom outside, being supplied with air by the pipe. This resembled in some respects the modern submarine armor, helmet, and diving-dress, which had been in occasional use since early in the sixteenth century (ut supra). Spalding, in 1774, made farther improvements by suspending a balance-weight from the bell that on striking bottom took off the weight of the bell, which with its included air, being too light to sink, was more readily raised or lowered by the admission of air or water into an upper compartment, placing it completely under the control of those within it. For this the British Government decreed him a reward. The celebrated engineer Smeaton, about the year 1779, first used it for engineering purposes,
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
red chalk. Gelatine glue; swell in cold water; immerse in linseed-oil and heat in a bath; add red lead. Water-proof glue; boil two ounces of isinglass in a pint of skim-milk, until the required consistence is obtained. Marine glue; shellac and caoutchouc, equal parts, dissolved in separate portions of naphtha, and then mixed. Or, india-rubber, 1 pound; coal naphtha, 4 gallons; shellac, 2 ounces. White fish-glue, or diamond cement, is made of isinglass dissolved in alcohol. Spalding's liquid glue; glue and acetic acid. Glue-boiler. Glue-boil′er. A convenient apparatus for boil- ing skins into glue has three coppers, at different hights; the upper, acted on by the waste heat from the chimney, warms the water, which is then drawn off into the central one (a) in which the scraps are placed, and which has a perforated false bottom, and the third (b) receives the gelatinous solution obtained by boiling. The last vessel is double, with water between the inner and
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
ar. 14, 1871. 112,980StrainMar. 21, 1871. 113,010BlanchardMar. 28, 1871. (Reissue.)4,663WillcoxDec. 5, 1871. 121,967SecorDec. 19, 1871. 123,576MathuesFeb. 13, 1872. 125,270CasselberryApr. 2, 1872. 151,558BlanchardJune 2, 1874. 156,603SpaldingNov. 3, 1874. 7. Needle-Sharpener. 114,265ClarkMay 2, 1871. 8. Needle Threaders and Setters. 27,762StevensApr. 3, 1860. 32,624HardieJune 25, 1861. 34,407ConradFeb. 18, 1862. 34,807BartlettApr. 1, 1862. 60,353FooteDec. 11, 1866. 69,463Micting water at their bottoms by means of cocks. He also contrived a headpiece, open at the lower part, which enabled a diver to leave the bell and make explorations outside, being supplied with air through a flexible tube leading into the bell. Spalding subsequently divided the bell into an upper and a lower chamber, the former to be wholly or partially filled with water, and serving to regulate the buoyancy, while the latter was occupied by the divers. By admitting air from the barrels into t