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).

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). < n.adj.1827
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