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Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
. Burgeoise. （Printing.) A size of type. See Bourgeoise. Burglar-Alarms. Burg′lar-a-larm. A device to be attached to a door or a window, to make an alarm when it is opened from without. Some alarms are portable, to be used by travelers in securing their doors against intrusion. As their name indicates, they are intended to make a noise when started, and they consist of bells, pistols, or torpedoes, sometimes associated with devices for lighting a lamp, and in one case (Powell, July 23, 1861) having an arrangement for upsetting the bed, and thereby calling the attention of the sleeper to the disturbance. The contrivance instanced by the Marquis of Worcester, with alarm, fire, tinder, and pistol, is described in his Century of inventions, and is cited ante, page 56. One device has a hinged plate on the threshold of the door, and partially concealed by the carpet. The foot of a person entering the room depresses the plate, and by means of a lever and rod actuat
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
stion a few years ago by Mr. Wenham of a method of dividing the pencil by means of a transparent plane reflector, which, adjusted at a proper angle, might reflect one half the light of each pencil, allowing the other half to pass through. This plan involves the loss of the stereoscopic effect, but secures to the observer the satisfaction of using both eyes in viewing an object. It has, however, proved somewhat difficult to carry out this idea satisfactorily in practice. See prism. Messrs. Powell and Lealand of London have patented an arrangement, consisting of a quadrangular prism which receives the rays, part of which pass through, while the remainder are reflected to a triangular prism which transmits them to the eye. This has the disadvantage of causing the object to appear unequally illuminated in the two tubes. Mr. R. B. Tolles has constructed an instrument designed to remedy the defects of the original binocular microscope, at the same time permitting the ordinary singl
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
4Lincoln et al.July 8, 1873. 146,628WoodruffJan. 20, 1874. 150,787PowellMay 12, 1874. 151,406LomaxMay 26, 1874. 152,374HenryJune 23, 1874. 130,763SullivanAug. 20, 1872. 131,027RodierSept. 3, 1872. 143,589PowellOct. 14, 1873. 146,736WilsonJan. 20, 1874. 4. Embroidering. 13,663. 136,859PeasleeMar. 18, 1873. 140,406DupreJuly 1, 1873. 142,812PowellSept. 16, 1873. 142,819SpringerSept. 16, 1873. 143,955BondOct. 28, 148,047GoodrichMar. 3, 1874. 148,048GoodrichMar. 3, 1874. 150,787PowellMay 12, 1874. 154,113BaglinAug. 18, 1874. 154,485HowardAug. 25, 1874. 158,231BallouDec. 29, 1874. (Reissue.)6,306PowellFeb. 23, 1875. 6. Hemmers. 10,386BlodgetJan. 3, 1854. 12,826OdiorneMay 8, 1855. 131,012LyonSept. 3, 1872. 131,277JohnstonSept. 10, 1872. 131,300PowellSept. 10, 1872. (Reissue.)5,052JohnstonSept. 10, 1872. (Re143,741BabcockOct. 21, 1873. 143,975FaulknerOct. 28, 1873. 146,094PowellDec. 30, 1873. 152,948HenryJuly 14, 1874. 154,052JonesAug. 11, 187