magneto-electricadj.

1831 M. Faraday Let. 29 Nov. in Corr. (1991) I. 590 [referring to the paper cited in quot. 1832¹] These two kinds of induction I have distinguished by the terms Volta-electric and Magneto-electric induction.

1832 M. Faraday in Philos. Trans. (Royal Soc.) 122 139 As a distinction in language is still necessary, I propose to call the agency thus exerted by ordinary magnets, magneto-electric or magnelectric induction.

1832 M. Faraday in Philos. Trans. (Royal Soc.) 122 173 Upon the supposition that the rotation of the earth tended, by magneto-electric induction, to cause currents in its own mass.

1833 M. Faraday in Philos. Trans. (Royal Soc.) 123 44 I had the pleasure..of making an experiment, for which the great magnet [sc. a lodestone] in the museum..and the magneto-electric coil described in my first paper, were put in requisition.

1834 M. Faraday in London & Edinb. Philos. Mag. 5 349 When I first obtained the magneto-electric spark it was by the use of a secondary magnet...My principal was an electromagnet; Nobili's was, I believe, an ordinary magnet; others have used the natural magnet.

1839 J. F. Daniell Introd. Study Chem. Philos. 489 Magneto-electric is the converse to electro-magnetic action.

1854 G. Bird & C. Brooke Elem. Nat. Philos. (ed. 4) xvii. 421 (note) Similarly, electro-magnetic induction would mean the development of magnetism by a current, and magneto-electric induction, that of a current by magnetism.

1892 O. Heaviside Electr. Papers I. xxx. 545 A mechanical force that we may call the Magnetoelectric Force.

1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) vii. 166 The magneto-electric effect is capable of application to measuring instruments which are spoken of as galvanometers.

1977 Jrnl. Royal Soc. Arts 125 764/1 Before the appearance of the self-excited dynamo in 1867 it was by no means obvious that magneto-electric induction would power the world's industries.

1832 M. Faraday in Philos. Trans. (Royal Soc.) 122 160 Two rough trials were made with the intention of constructing magneto-electric machines.

1832 M. Faraday in Philos. Trans. (Royal Soc.) 122 163 [Under heading Terrestrial Magneto-electric Induction, describes as magneto-electric machines discs of copper caused to revolve, and thereby generate electric currents under the magnetic influence of the earth.]

1866 W. Crookes in Q. Jrnl. Sci. 12 504 Magneto-electric machines, with revolving armatures, in which electro-magnets had been substituted for permanent magnets, had been constructed.

1867 C. Wheatstone in Proc. Royal Soc. 15 369 The magneto-electric machines which have been hitherto described are actuated either by a permanent magnet or by an electro-magnet.

1878 Proc. Inst. Civil Engineers 52 63 M. Alfred Niaudet remarked that he did not agree with..the distinction between dynamo-electric and magneto-electric machines. In all these instruments mechanical power was converted into electricity by the action of magnetism; consequently all were both magneto-electric and dynamo-electric.

1878 J. N. Shoolbred Pres. State Electr. Lighting 6 For the older form, where permanent magnets are employed, the term ‘magneto-electric’ machine has been retained.

1880 A. Siemens in Jrnl. Soc. Telegr. Engineers 9 93 A constant and permanent magnetic-field is, therefore, of paramount importance, and it can be produced in the way proposed by Mr. Wilde in 1863 for magneto-electric machines by employing a separate machine for exciting the field-magnets of one or more similar machines.

1882 Jrnl. Soc. Arts 31 120 The arbitrary distinction between so-called magneto-electric machines and dynamo-electric machines fails when examined carefully. In all these machines a magnet, whether permanently excited, independently excited, or self-excited, is employed to provide a field of magnetic force. And in all of them dynamic power is employed.

1887 W. B. Esson Magneto- & Dynamo-electric Machines 22 In all the machines yet described, the electric currents were induced by means of steel magnets, or, as in Wilde's machine, by magnets that were magnetised by the current produced in another machine. Such machines are usually called ‘magneto-electric’ machines, to distinguish them from the ‘dynamo-electric’ machines.

1889 Chambers's Encycl. IV. 146/2 The term ‘dynamo-electric’ was at first applied to distinguish those machines which were self-exciting from ‘magneto-electric’ machines, which had permanent magnets to give the field; but this distinction is no longer maintained.

1891 J. W. Urquhart Dynamo Constr. 2 A magneto-electric machine—an apparatus in which steel magnets are used to furnish the ‘magnetic field’—is not strictly by common consent called a dynamo.

1910 Encycl. Brit. IX. 187/2 With the advent of large magnetoelectric machines the era of electrotechnics was fairly entered.

1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) vii. 183 The original type, the magneto-electric machine, has been displaced by a new form—the dynamo machine.

1959 Motor Man. (ed. 36) vi. 169 There are two systems [of ignition]. One, commonly known as coil ignition, takes in low tension current from the battery and converts it to high tension. The other depends upon a magneto-electric machine—a magneto, for short—which is driven by the engine.

1852 M. Faraday in Philos. Trans. (Royal Soc.) 142 137 On the employment of the Induced Magneto-electric Current as a test and measure of Magnetic Forces.

1877 Telegraphic Jrnl. 5 19/1 The application of the magneto-electric current for..burglar alarms.