| 释义 |
inductor|ɪnˈdʌktə(r)|
[a. L. inductor, agent-n. from indūcĕre, induct v.]
1. One who introduces or initiates. rare.
1652Brome City Wit v. Wks. 1873 I. 364 Try. Who should act and personate these?.. Sar. I'le play the Inductor, and then we are all fitted. 1841L. Hunt Seer ii. (1864) 28 Inductor of ladies and gentlemen into the shapely and salutary art of dancing.
2. One who inducts a clergyman to a benefice.
1726Ayliffe Parergon 283 If Inductors received more than this on the Score of such Induction..they were..to incur a Suspension ab officio. 1818Cruise Digest (ed. 2) III. 15 After which the inductor opens the door, and puts the clerk into the church, who usually tolls the bell to make his induction public, and known to the parishioners; after this the inductor endorses a certificate of the induction on the mandate, which is witnessed by the persons present.
3. 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).
1867W. Thomson in Proc. R. Soc. XVI. 67 To stems connected with the inside coatings of two Leyden phials are connected [cylindrical] metal pieces, which..I shall call inductors and receivers. Ibid. 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. 1881Maxwell Electr. & Magn. I. 295 The moveable conductors are called Carriers, and the fixed ones may be called Inductors, Receivers, and Regenerators. 1892Electrician 13 May 37/2 Electric currents are produced by revolving the magnetic inductors in proximity to the magnet. 1909R. 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. 1915W. H. Eccles Wireless Telegr. 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. 1941A. 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. 1956D. 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.
attrib.1891Times 2 Oct. 3/2 In the machinery hall they show the Kingdon inductor dynamo, a most efficient and interesting machine.
b. A conductor or device in which an e.m.f. or current is induced; earth inductor, 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.
1837tr. 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. 1883E. Atkinson tr. Ganot's 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. 1883Encycl. 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. 1901Sheldon & 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. 1940R. 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. 1966McGraw-Hill Encycl. Sci. & Technol. IV. 338/2 The earth inductor has almost completely supplanted the dip circle throughout the world for precise measurement of magnetic inclination. 1973Sci. 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).
1872J. & C. Lassell tr. Schellen's Spectrum Analysis 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. 1904Electr. World & Engin. XLIV. 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.
1928Sterling & Kruse Radio Manual i. 20 Iron Core Inductance.—This form of inductor is made by winding many turns of wire on an iron core. 1950K. 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. 1963Williams & 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. Chem. 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.
1903Jrnl. Chem. Soc. LXXXIV. 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’. 1918Chem. Abstr. XII. 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’). 1937Thorpe'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. 1966A. 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. Embryol. A region of an embryo, or a substance produced by such a region, capable of causing induction (sense 9 b).
1929Biol. Abstr. III. 1495/2 The action of the inductor, whatever it be, manifests itself in the activation of a supernumerary embryonic field. 1946L. 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. 1963E. 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. 1967T. 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.
6. Special Comb.: inductor alternator, 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; (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; inductor generator = inductor alternator.
1893W. P. Maycock Electr. Lighting ii. viii. 239 Kingdon's *Inductor Alternator. 1940R. 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. 1965J. 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.
1922Rep. 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. 1926Encycl. 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. 1927Lindbergh 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. 1931M. 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. 1943Redpath & 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. 1958Van 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.
1940Chambers's Techn. Dict. 446/1 *Inductor generator. 1957Encycl. 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. |