| 释义 |
chronoscope|ˈkrɒnəʊskəʊp|
[f. Gr. χρόνο-ς time + -σκοπος observer.]
An instrument for observing and measuring time. †a. A chronometric pendulum. Obs.
1704J. Harris Lex. Techn., Chronoscope, the same with a Pendulum to measure Time. 1731–1800in Bailey.
b. (a) An instrument for measuring very short intervals of time, which has been chiefly used in determining the velocity of projectiles. It was invented by Wheatstone in 1840, and consists of wire targets placed in the line of fire. The projectile passing through these severs the wire, and the moment of severance is recorded by electricity. (b) A device used for measuring the time of reaction in psychological experiments.
1846Faraday Res. xlix. 366 Incidental to the accounts I gave of Wheatstone's electro-magnetic chronoscope. 1890Billings Nat. Med. Dict. 277/2 Chronoscope, peculiar form of clock, regulated by a vibrating spring, in which the hands are thrown into or out of gear by an electro⁓magnet, and record thousandths of a second. 1923Chambers's Jrnl. 603/2 When the examiner speaks the chronoscope revolves; when the subject speaks, it stops... The hiatus [between question and answer] is duly recorded by the chronoscope. 1934Brit. Jrnl. Psychol. Apr. 391 The writer constructed a phonic chronoscope.
c. (See quot.)
1884F. J. Britten Watch & Clockm. 60 [A] Chronoscope..is..a clock in which the time is shewn by figures presented through holes in the dial.
Hence chronoˈscopic a.
1876S. Kens. Museum Catal. No. 1354 The instant of stimulation registered on the chronoscopic line by the current itself. Ibid. 3953 Chronoscopic Tuning Forks. Set of 4 tuning forks..to be used as chronoscopes. |