Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Sig or search for Sig in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
ns of controlling machinery at a distance, the electric circuit, by its magnetic power, affords means for putting a detent into action or removing it. Electric steam-gage. Stop motions in machinery are also made effective by electric connection, as, for instance, in spinning and knitting machines, when the breaking of a thread allows a metallic arm to drop, and this comes in contact with a tongue, and makes a connection which turns a band on to a loose pulley or otherwise. E-lec′tric Sig′nal. One in which visual, palpable, or audible signals, by simple or repetitive sounds or by code, are conveyed by electric influence. The motion of bell-hammers, of flags, index-fingers, or semaphoric arms may be held as included in this definition, which thus covers telegraphing and signaling by electric circuit. By a not distant connection, storm-signals and time-balls of observatories may be held as included. E-lec′tric Steamgage. A steam-boiler attachment, in which the rise<
Knight's Mechanical Encyclopedia (ed. Knight), N. (search)
his is effected by the circle being attached to two tangent plates, which, by grooves, slide on the projections from the horizontal plate by means of screws passing through and working in these projections, and carrying the tangent plates, and with them the horary circle, to the degree of the sun's declination. This degree is indicated on a scale of tangent divisions on the tangent plates; and as such tangents are of various lengths, an expanding vernier is used to adjust them. Nau′ti-cal Sig′nals. Signals for affording communication between vessels at sea or between vessels and the shore, consist of a system of flags of various colors for use by day or of lanterns at night, each separate combination and arrangement of which indicates some phrase or sentence that is or may be required in directing the evolutions of a fleet, the movements of a single vessel, making known the wants of the ship which displays it, or in replying to signals made by other parties. A more limited num
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
e printer to judge of the perfectness of the work. Sig′nal. A means of communication by audible or visible-alarm telegraph. Steamboat-signal apparatus. Sig′nal-appa-ra′tus. A device to operate or transmit as will move the index through a proportionate arc. Sig′nal-box. A street box having a signaling apparatusarms of fire. See fire-alarm telegraph, page 849. Sig′nal-lamp. 1. A lamp with white, red, and blue paned to two points abaft the beam, are to be carried. Sig′nal-light. A form of signal-light to be thrown i desired direction, either in altitude or azimuth. Sig′nal-post. A staff for displaying flags or signal-lanterns. Sig′nal-rock′et. Signal-rockets are composed of a case, charged with composition; a pot filled whes diameter only ascend to from 450 to 600 yards. Sig′nal-tow′er. An elevated structure, as a beacon, from which to display a semaphore or other signal. Sig′na-ture. A distinguishing letter or
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
each room, to strike the hours as they recur, in concert with the striking of the principal clock. Telegraph-carriage. Tel′e-graph-di′al. A circle on which are arranged the letters of the alphabet, figures, etc., the hand or pointer being operated by electro-magnetic action. See dial, Fig. 1628; indicator-Tele-Graph, pages 1181, 1182. Telegraph-clock. Tel′e-graph′ic key-board. The bank of keys of a printingtele-graph machine. See Fig. 3960, page 1802. Tel′e-graph′ic Sig′nal. An alarm or visual indicator, usually set in motion by electro-magnetic means. See telegraphic alarm; sounder. Tel′e-graph-in′di-cat′or. A pointer-telegraph. See indicator, Fig. 2669, page 1181. Tel′e-graph-in′stru-ment. A moving mechanical device used in the electric circuit. A perforator, transmitter, receiver, relay, register, or what not. See list under telegraph. Tel′e-graph-key. （Telegraphy.) The vibrating piece in a transmitting-ins