| 释义 |
pressure plate
[f. pressure n. + plate n.]
a. A plate for detecting or receiving pressure, spec. in an anemometer.
b. A plate for applying pressure, spec. in a clutch.
1845Rep. Brit. Assoc. Adv. Sci. 1844 24 A contrivance..is affixed to the pressure plate, by means of which the fluid is deposited at a variable rate, but always depending on the force on the pressure plate at the time. 1856Ibid. 1885 127 The force of the wind is ascertained by means of a circular plate having an area of four square feet, which is kept by the vane at right angles to the current of the wind... To this pressure-plate is attached a wire which communicates with a recording pencil. 1892Q. Jrnl. R. Meteorol. Soc. XVIII. 174 It was not possible to obtain a perfectly distinct line from the pen of the Pressure Plate during a gale unless the paper moved at least 2 inches in each minute. 1921J. V. Woodworth Amer. Tool Making xxvii. 445 The pressure on the foot treadle, which causes the pressure plate to clamp the can and lid against the chuck, also throws in the friction clutch which starts the work. 1958Newnes Compl. Amat. Photogr. iv. 71 In a 35 mm. camera, the pressure plate should be examined carefully. 1963D. H. McIntosh Meteorol. Gloss. (ed. 4) 16 In the pressure-plate anemometer, the deflexion of a flat plate placed in the wind is measured; its use is confined mainly to atmospheric turbulence measurement. 1976Horse & Hound 3 Dec. 66 (Advt.), Superb rebuilt Land-Rovers fitted with..new clutch and pressure plate. |