Bourdon3
(ˈbʊədɒn)
The name of Eugène Bourdon (1808–84), French hydraulic engineer, used attrib. and in the possessive to designate his inventions: Bourdon('s) barometer, gauge, manometer, a pressure gauge employing a Bourdon tube; Bourdon coil, spiral, tube, a coiled metallic tube which tends to straighten out when pressure is exerted within it.
| 1859 Negretti & Zambra's Catal. Opt. & Meteorol. Instruments 23 Bourdon's Barometers, card dial..metal dial and plate glass front. 1864 Negretti & Zambra's Treat. Meteorol. Instruments 7 Bourdon's Pressure Gauge, with metal taps, adapted for all pressure below nine atmospheres. a 1877 Knight Dict. Mech. s.v. Bourdon Barometer, The Bourdon is commonly known as the metallic barometer. 1886 Q. Jrnl. R. Meteorol. Soc. XII. 124 Each thermometer consists of a very thin curved metal case (a Bourdon tube). 1901 W. W. F. Pullen Steam Engin. iv. 143 The Bourdon Gauge consists of an oval tube bent nearly into a complete circle, one end being fixed and the other free to move. 1923 Glazebrook Dict. Appl. Physics III. 494/2 The Bourdon tube thermograph. Ibid., The Bourdon tube thermometer is much less sensitive to change of temperature than the bimetallic thermometer. 1930 Engineering 14 Feb. 214/2 Any fall in pressure in the Bourdon tube will tend to open the pilot valve. 1959 H. Barnes Oceanogr. & Marine Biol. 121 [In the bathythermograph] the temperature-responsive unit is not a wire but a liquid in metal thermometer with a Bourdon spiral. |