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单词 sliding contact
释义

> as lemmas

sliding contact
b. In sense ‘of the nature of, connected with, sliding’, as sliding contact, sliding motion, sliding principle.
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1690 J. Locke Ess. Humane Understanding ii. xxiii. 144 All parts of Bodies must be easily separable by such a lateral sliding motion.
1815 J. Smith Panorama Sci. & Art II. 664 The lights..should be of the usual sliding construction.
1843 C. Holtzapffel Turning & Mech. Manip. I. 378 A very considerable amount of the sliding motion of the metal would be called into play.
1869 W. J. M. Rankine Cycl. Machine & Hand-tools 114 The acting surfaces of a pair of pieces in sliding contact.
1875 E. H. Knight Amer. Mech. Dict. III. 2210/2 The gages used by carpenters and artificers generally are on the sliding principle.
extracted from slidingn.
sliding contact
sliding contact n. [sliding n. 2b] a connection in an electric circuit that can be slid along a length of resistance wire.
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the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > movable contact
slider1872
sliding contact1872
slide-wire1885
1872 Jrnl. Soc. Telegr. Engineers 1 208 The wire with sliding contact was apt to wear if much used.
1906 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. s.v. Wheatstone's Bridge The other end terminates in a sliding contact which can be moved along till a ‘balance’ is obtained.
1926 R. W. Hutchinson First Course Wireless 77 Sliding contacts can be moved to and fro along two brass sliding rails.
1971 B. Scharf Engin. & its Lang. xxi. 307 In order to vary the value of one of the known resistances a rheostat may be used, or two of the known resistances may be replaced by a single wire of known resistance with a sliding contact.
extracted from slidingadj.
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