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单词 touch needle
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touch needle
touch needle n. [in sense (b) after German Streichnadel (15th cent. as streich nadil)] now historical (a) the magnetic needle of a compass (cf. sense 11) (obsolete rare); (b) any of a set of needles or small bars of gold or silver of varying purity used in conjunction with a touchstone in assaying (also called proof needle).
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society > occupation and work > equipment > metalworking equipment > [noun] > equipment for testing quality of metal
needle1469
touchstone1530
parting glass1594
proof needle1683
stroking needle1683
touch needle1683
Lydian-stone1720
scorifier1758
sebilla1839
sonometer1849
quantometer1927
a1632 T. Dekker Wonder of Kingdome (1636) ii. i. sig. C4v I finde it, for being loyall, As the touch-needle to one starre still turning.
1683 J. Pettus tr. L. Ercker i. xxiv. 63 in Fleta Minor i The silver Touch-Needles [Ger. Streichnadeln] (which are also called Proof-Needles).
1763 W. Lewis Commercium Philosophico-technicum 124 Accustoming himself to compare the colours of a good set of Touch needles.
1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 266 Touch needles are small bars of gold, one each of all the different standards likely to be tested.
1991 J. Blair & N. Ramsay Eng. Medieval Industries vi. 113 The colour of the resulting mark on the touchstone was compared with marks produced on the same stone by alloys of known composition, in the form of touch-needles.
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