inductorn.
/ɪnˈdʌktə/, U.S. /ᵻnˈdəktər/ 1. One who introduces or initiates. rare.
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the world > action or operation > behaviour > good behaviour > courtesy > courteous act or expression > [noun] > introduction > one who introduces
inductora1652
introducer1659
introductressa1747
a1652 R. Brome City Wit v. sig. F6v, in Five New Playes (1653) Try. But who should act and personate these?.. Sar. Ile play the Inductor, and then we are all fitted.
1841 L. Hunt Seer (1864) ii. 28 Inductor of ladies and gentlemen into the shapely and salutary art of dancing.
2. One who inducts a clergyman to a benefice.
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society > faith > worship > benefice > [noun] > induction to > one who performs
inductor1726
1726 J. Ayliffe Parergon Juris Canonici Anglicani 283 If Inductors received more than this on the Score of such Induction..they were..to incur a Suspension ab officio.
1804 W. Cruise Digest Laws Eng. Real Prop. III. 19 After which the inductor opens the door and puts the person inducted into the church; who usually tolls a bell to make his induction public, and known to the parishioners; which being done, the clergyman who has inducted the clerk, indorses a certificate of his induction on the mandate, which is witnessed by the persons present.
3. attributive.1891 Times 2 Oct. 3/2 In the machinery hall they show the Kingdon inductor dynamo, a most efficient and interesting machine.
a. Any part of an electric apparatus which acts inductively on another. esp. one which induces an e.m.f. or current in another part (as in an inductor alternator).
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the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > dynamo > [noun] > dynamo giving alternating current > inductor
inductor1867
inductor alternator1893
inductor generator1940
1867 W. Thomson in Proc. Royal Soc. 16 67 To stems connected with the inside coatings of two Leyden phials are connected [cylindrical] metal pieces, which..I shall call inductors and receivers.
1867 W. Thomson in Proc. Royal Soc. 16 68 Suppose now a small positive charge of electricity be given to the first jar. Its inductor electrifies negatively each drop of water breaking away in its centre from the continuous uninsulated water above.
1881 J. C. Maxwell Treat. Electr. & Magnetism (ed. 2) I. 295 The moveable conductors are called Carriers, and the fixed ones may be called Inductors, Receivers, and Regenerators.
1892 Electrician 13 May 37/2 Electric currents are produced by revolving the magnetic inductors in proximity to the magnet.
1909 R. B. Whitman Motor-car Princ. (rev. ed.) 320 The Remy magneto is of this type, and Fig. 17 is a diagram of the revolving core, or inductor, with the coil surrounding it.
1915 W. H. Eccles Wireless Telegr. & Teleph. 204 This alternator is of the inductor type... The inductor or rotor is a chrome-nickel steel disc about a foot diameter with 300 slots cut 1/ 8 in. apart near its edge.
1941 A. W. Judge Aircraft Engines II. ix. 338 The polar inductor magneto has stationary magnets as well as coils, and the changes of magnetic flux are obtained by rotating soft-iron inductors between the poles of the magnets.
1956 D. Warburton-Brown Induction Heating Pract. i. 8 In any induction heating arrangement there are three main components, namely: (a) a high-frequency generator; (b) a work-coil or inductor; (c) a work-piece.
b. A conductor or device in which an e.m.f. or current is induced; earth inductor n. a device for investigating the earth's magnetic field, consisting essentially of a coil of wire that can be rapidly turned about an axis in its own plane so that a current is induced in it proportional to the component of the field normal to the axis of rotation.
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the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > conductor
inductor1837
transmission line1906
the world > matter > physics > electromagnetic radiation > magnetism > earth magnetism > [noun] > instrument measuring
magnetimeter1823
magnetometer1827
earth inductor1883
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > field > device investigating
earth inductor1883
1837 tr. Gauss in Mag. Pop. Sci. III. 109 A few weeks ago I had my inductor increased again, (from 3527 to about 6800 convolutions,) and now its effects are much stronger. The sensations it produces by the current being transmitted through the body..are not only very perceptible, but, when the inductor is rapidly moved, painful almost beyond endurance.
1883 E. Atkinson tr. A. Ganot Elem. Treat. Physics (ed. 11) x. vi. 852 The inductor itself..consists of a drum-shaped frame of soft iron wire covered with a layer of insulating material, and fixed to an axle which..is rotated... Machines of this class give continuous currents, but alternators..are also constructed.
1883 Encycl. Brit. XV. 240/2 This is the principle of Weber's ‘earth inductor’, by means of which the horizontal and vertical components of the earth's force can be measured, and in consequence the declination and inclination determined.
1901 S. Sheldon & H. Mason Dynamo Electr. Machinery iii. 45 By inductor is meant that part of the winding conductor which lies on the face of the armature that sweeps past the pole pieces, and..in which E.M.F. is induced.
1940 R. R. Lawrence Princ. Alternating-current Machinery (ed. 3) i. 1 Any direct-current generator, with the exception of the unipolar generator, is in fact an alternator in which the alternating voltage set up in the armature inductors is rectified by means of a commutator.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) IV. 338/2 The earth inductor has almost completely supplanted the dip circle throughout the world for precise measurement of magnetic inclination.
1973 Sci. Amer. Feb. 101/2 A unipolar inductor is a magnetized metal sphere. One terminal of an external circuit is attached to one of the sphere's poles of rotation and the other terminal is a stationary brush in contact with the sphere's equator. When the sphere is spun, a galvanometer in the circuit registers the passage of an electric current.
c. An induction coil (Ruhmkorff coil).
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the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction coil
induction coil1837
coil1849
Ruhmkorff coil1850
Ruhmkorff1858
inductor1872
1872 J. Lassell & C. Lassell tr. H. Schellen Spectrum Anal. xxx. 157 By connecting the binding screws 1, 2 on one side with the inductor, and on the other side..with the platinum wire b of the first vessel, and a2 of the last vessel,..the electric current may be made to pass through all the liquids.
1904 Electr. World & Engineer 24 Sept. 513/2 A very imposing view..is given by the seven induction coils arranged upon steps in the centre of the cabinet, beginning at the bottom, with an inductor giving a 40-inch spark and ending at the top with one of 10-inch spark.
d. A device (commonly a coil) possessing inductance or used on account of its inductance.
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the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > [noun] > inductance coil
inductance coil1902
inductance1908
variometer1908
honeycomb coil1921
inductor1928
hum-bucking coil1940
1928 G. E. Sterling & R. S. Kruse Radio Man. i. 20 Iron Core Inductance.—This form of inductor is made by winding many turns of wire on an iron core.
1950 K. Henney Radio Engin. Handbk. (ed. 4) iii. 124 Straight wires are used as inductors in h-f applications where the inductance must be very low.
1963 G. E. Williams & B. J. Prigmore Electr. Engin. v. 129 A standard mutual inductor..can be made by winding coil No. 1 on a long straight core and winding No. 2 round the mid-portion of No. 1.
4. Chemistry. Any substance which while reacting with one substance (the ‘actor’) increases the rate at which this reacts with a second substance (the ‘acceptor’); a substance that has an accelerating effect on a reaction but differs from a catalyst in being consumed.
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the world > matter > chemistry > chemical reactions or processes > [noun] > processes or substances affecting reactions > induction > inductor
inductor1903
1903 Jrnl. Chem. Soc. 84 ii. 277 The substance taking part in both these reactions..is termed the ‘actor’; the substance taking part only in the primary reaction..is the ‘inductor’; the substance taking part only in the secondary reaction is the ‘acceptor’.
1918 Chem. Abstr. 12 111 A number of reduction reactions which take place at ordinary temps. in sunlight, fail to proceed even at more elevated temps. in the dark. The reactions may be induced to take place in the dark by the addition of small amts. of certain oxidizing agents (‘inductors’).
1937 Thorpe's Dict. Appl. Chem. (ed. 4) I. 12/2 Acceptor, a substance..which normally is not oxidised by oxygen (or reduced by hydrogen) but is oxidised (or reduced) when in presence of another substance termed the inductor..which itself is undergoing oxidation (or reduction) by a third substance the actor.
1966 A. G. Sykes Kinetics Inorg. Reactions ix. 205 Arsenite ions are..effective in inducing the reaction between CrVI and iodide, and, at high iodide concentrations, a ratio of two equivalents of iodide to one of the inductor are likewise involved.
5. Embryology. A region of an embryo, or a substance produced by such a region, capable of causing induction (sense 9b).
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the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > regions
segment1826
lateral plate1859
protovertebra1869
mesomere1902
organizator1924
organizer1925
field1927
organization centre1928
inductor1929
1929 Biol. Abstr. 3 1495/2 The action of the inductor, whatever it be, manifests itself in the activation of a supernumerary embryonic field.
1946 L. B. Arey Developmental Anat. (ed. 5) ix. 163 The specific, morphogenetic effect brought about by a chemical stimulus transmitted from one embryonic part to another is known as an induction or evocation. The part exerting this influence is an inductor or organizer, and the chemical substance emitted is an evocator.
1963 E. J. W. Barrington Introd. Gen. & Compar. Endocrinol. vi. 152 Germ cells that enter the cortex become female, those that enter the medulla become male, and in embryological terminology these two regions are said to act respectively as female and male inductors.
1967 T. W. Torrey Morphogenesis Vertebr. (ed. 2) xviii. 359/1 An inherent difficulty in the identification of the ‘natural’ inductor lies in the minute amount available for analysis.
Compounds
inductor alternator n. an alternator in which both armature and field windings are stationary, the current being produced by the periodic variation in the magnetic flux through the armature windings as successive teeth of a rotating inductor pass by.
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the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > dynamo > [noun] > dynamo giving alternating current > inductor
inductor1867
inductor alternator1893
inductor generator1940
1893 W. P. Maycock Electr. Lighting ii. viii. 239 Kingdon's Inductor Alternator.
1940 R. R. Lawrence Princ. Alternating-current Machinery (ed. 3) 3 An inductor alternator is usually characterized by large armature reaction, relatively high magnetic density, small air gap and greater weight than alternators of the other types. The difficulties in the design of a satisfactory inductor alternator have caused this type of alternator to go out of use.
1965 J. Hindmarsh Electr. Machines viii. 482 Another special case of single-phase generator is the inductor alternator used to provide high-frequency supplies in the range 1000 to 10,000 cycles/sec for use in induction furnaces. Here, all the windings are on the stator.
inductor compass n. (also earth-inductor compass) any of various kinds of compass in which the earth's magnetic field is made to induce in a coil an electric current whose strength depends on the relative orientation of the coil to the field.
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society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > types of
paradoxal compass1558
steering compass1669
variation compass1669
correcting compass1821
telltale1828
pelorus1854
liquid compass1865
gyroscope-compass1909
gyro-compass1910
radio compass1912
gyro1914
gyroscopic compass1920
inductor compass1922
gyro-pilot1923
induction compass1925
astrocompass1942
flux gate compass1946
1922 Rep. U.S. Nat. Advisory Comm. Aeronaut. No. 128. 44 The earth inductor compass..was developed by Dr. Paul R. Heyl and Dr. Lyman J. Briggs of the Bureau of Standards.
1926 Encycl. Brit. Suppl. I. 19/2 The earth inductor compass, developed in America, depends upon the measurement of the electromotive force induced by the earth's magnetic field in a coil rotating about a vertical axis.
1927 Lindbergh in Sci. Monthly XXV. 91/1 I also had a magnetic compass; but it was the inductor compass which guided me so faithfully that I hit the Irish coast... The inductor compass was so accurate that I really needed no other guide.
1931 M. F. Schoeffel in P. V. H. Weems Air Navigation vii. 93 Although the armature of an inductor compass is gyroscopic, yet, since it is also pendulous, it tends to..bank with the plane.
1943 P. H. Redpath & J. M. Coburn Air Transport Navigation iv. 80 The principle of the inductor compass is to generate electric currents utilizing the earth's magnetic field to operate suitable indicating instruments in the cockpit.
1958 Van Nostrand's Sci. Encycl. (ed. 3) 386/2 The earth-inductor compass was designed..for use on aircraft, but has been rendered obsolete by the aperiodic and gyro-flux-gate instruments.
inductor disk n. = inductor-plate n.
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society > occupation and work > equipment > machine > machines which impart power > [noun] > dynamo > parts of
commutator1880
inductor disk1885
rocker1888
inductor-plate1894
1885 P. Higgs Magneto- & Dynamo-electric Machines 247 With the inductor disk making 140 revolutions per minute..a total current of 5,000 ampères is obtained.
inductor generator n. = inductor alternator n.
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the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > dynamo > [noun] > dynamo giving alternating current > inductor
inductor1867
inductor alternator1893
inductor generator1940
1940 Chambers's Techn. Dict. 446/1 Inductor generator.
1957 Encycl. Brit. VIII. 148/1 For a given number of poles and a given speed of rotation, an inductor generator delivers twice the frequency of the present common types of A.C. generators. In the early years of radio telegraphy the inductor generator was the best source of the frequencies required.
inductor-plate n. the soft iron plates in a dynamo by means of which the current is induced.
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society > occupation and work > equipment > machine > machines which impart power > [noun] > dynamo > parts of
commutator1880
inductor disk1885
rocker1888
inductor-plate1894
1894 W. P. Maycock Electric Lighting (ed. 2) ii. viii. § 141 239 The moving part consists of a wheel on which are mounted blocks of soft iron called inductor-plates.
This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2022).
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n.a1652