| 单词 | tangent scale |
| 释义 | > as lemmastangent scale tangent scale n. (a) in Gunnery, a kind of breech-sight in which the heights of the steps or notches correspond to the tangents of the angle of elevation; (b) a graduated scale indicating the tangents of angles (see quot. 1902). ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > graduated instruments > graduated scale > other scales tangent scale1859 mirror scale1889 Modulor1948 society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > parts and fittings of firearms > [noun] > sight > types of dispart1578 telescopic sight1674 plain sight1686 aim-frontlet1745 hausse1787 foresight1806 gloaming sight1817 night-sight1822 bead1831 leaf1832 backsight1847 globe sight1847 pendulum hausse1850 hindsight1851 tangent scale1859 tangent1861 tangent backsight1862 training pendulum1862 training level1863 peep sight1866 dispart-sight1867 notch sight1867 buck-horn1877 orthoptic1881 aperturea1884 pinball-sighta1884 dispart patch1884 sight bar1884 flap-sight1887 barley-corn1896 ring sight1901 riflescope1902 spotting scope1904 tangent sight1908 Aldis sight1918 wind-sight1923 scope sight1934 gyro-sight1942 1859 F. A. Griffiths Artillerist's Man. (1862) 51 A Tangent scale is affixed to the breech of Guns, and Howitzers, by means of which the requisite elevation may be given. 1902 T. O'C. Sloane Standard Electr. Dict. Tangent scale, an arc of a circle in which the number of graduations in any arc starting from zero are proportional to the tangent of the angle subtended by such arc. The system is for use with tangent galvanometers. < as lemmas |
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