electrodynamometern.
/ᵻˌlɛktrəʊˌdʌɪnəˈmɒmᵻtə/, U.S. /əˌlɛktroʊˌdaɪnəˈmɑmədər/, /iˌlɛktroʊˌdaɪnəˈmɑmədər/ 1. An electrodynamic instrument for measuring electric current or electric power, esp. one consisting of an arrangement of current-carrying coils.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > mutual influence of currents > instrument measuring
electrodynamometer1851
1851 Abstr. Papers Royal Soc. 1843–50 5 863 His [sc. Weber's] work commences with a description of a new and very ingenious instrument, which he calls an Electrodynamometer. It consists of two coils of fine wire, the smaller of which is suspended within the other by a bifilar suspension, so that their centres coincide and their axes are at right angles.
1892 W. P. Maycock Electr. Lighting I. v. 122 Siemens' wattmeter is very similar in appearance to the electro-dynamometer.
1963 Science 8 Feb. 509/3 An electronic multiplier is used to drive a phase-sensitive instrument with characteristics similar to an electrodynamometer wattmeter.
1987 E. H. J. Pallett Aircraft Electr. Syst. (ed. 3) viii. 128/2 The indicating element..is of the standard electrodynamometer pattern consisting essentially of a moving coil and a fixed field coil.
2. Science. An instrument based on the traditional electrodynamometer and used for measuring small displacements of soft or yielding materials in response to applied forces and (hence) the elastic properties of the material.
ΚΠ
1980 Jrnl. Acoustic Soc. Amer. 67 Suppl. 1. 25/1 The gas bearing electrodynamometer (GBE), smaller than a baseball, has now reached a state of perfection and proved itself of sufficient value [etc.].
1991 R. Mast in E. Jungermann & N. O. V. Sonntag Glycerine x. 244 Viscoelastic properties of the stratum corneum have also been successfully measured with the electrodynamometer.
2003 European Patent 1,298,584 7 A gas bearing electrodynamometer to measure skin softness and suppleness.
This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).
<
n.1851