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单词 open circuit
释义

open circuitn.adj.

Brit. /ˌəʊp(ə)n ˈsəːkɪt/, U.S. /ˌoʊp(ə)n ˈsərkət/
Origin: Formed within English, by compounding. Etymons: open adj., circuit n.
Etymology: < open adj. + circuit n.
A. n.
A circuit, esp. an electric circuit, that is incomplete.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > circuit > [noun] > incomplete circuit
open circuit1827
1827 J. Cumming Man. Electro Dynamics iv. 164 In all cases of continued rotation, one of the conductors forms an open circuit.
1893 S. R. Bottone How to manage Dynamo 42 This line of conductors is said to form an open circuit when there is any gap in the way; and then no current can flow.
1914 R. Stanley Text-bk. Wireless Telegr. 91 Using a suitable length of spark gap the discharge of this Hertzian open circuit is oscillatory.
1977 G. V. Higgins Dreamland vi. 59 If I don't touch an open circuit..it'll be a cave-in, or a blast.
1994 Electronic Musician Oct. 123/1 Certainly a zener diode does not provide a perfect open circuit..when it is idling.
B. adj.
Of, relating to, or containing an open circuit; spec. designating a breathing apparatus in which air is exhaled into the atmosphere and so lost to the system.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > circuit > [adjective] > incomplete
open circuit1876
open-circuited1904
the world > action or operation > safety > protection or defence > [noun] > means of protection or defence > device or contrivance to protect a thing or person > protection worn on face > respirator
mouthpiece1790
nosebag1834
respirator1836
inhaler1864
smoke respirator1866
aerophore1876
open circuit1876
inspirator1898
muzzle1899
smoke helmet1900
gas helmet1910
gas mask1915
mask1915
oxygen mask1920
inhalator1929
closed circuit1953
1876 W. H. Preece & J. Sivewright Telegraphy iv. 105 Where many intermediate stations are fixed on one wire worked on the Morse principle, the closed circuit system offers considerable advantages over the open circuit system.
1907 J. Erskine-Murray Handbk. Wireless Telegr. 5 Modern wireless telegraphy is, in general, open circuit telegraphy.
1939 Jrnl. Exper. Zool. 82 420 The method employed for measuring the rate of metabolism was an open-circuit respiration system.
1956 C. Evans Kanchenjunga ix. 92 I planned that every European going above Camp 3 should..climb with an open-circuit oxygen set.
1993 Sci. Amer. Mar. 76/1 Open-circuit lamps show no noticeable signs of carving or shaping.
This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022).
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n.adj.1827
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