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cyclograph
cyclograph n. 
/ˈsʌɪkləɡraf/, /ˈsɪkləɡrɑːf/, /ˈsɪkləɡraf/, /ˈsɪkləˌɡræf/ [-γραϕος writer] (a) an instrument for tracing circular arcs; (b) an oscilloscope (see quots.).
Brit. /ˈsʌɪkləɡrɑːf/
, /ˈsʌɪkləɡrɑːf//ˈsʌɪkləɡraf//ˈsɪkləɡrɑːf//ˈsɪkləɡraf/U.S. /ˈsaɪkləˌɡræf/
, /ˈsaɪkləˌɡræf//ˈsɪkləˌɡræf/ΘΚΠ
society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments
sweep1680
bow1706
trammel1725
stock1815
cyclograph1823
trainer1848
set square1854
stereograph1877
tracer1878
philograph1892
the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] > cyclograph
cyclograph1931
1823 P. Nicholson New Pract. Builder 562 The Cyclograph is an instrument for drawing arcs of circles.
1931 S. R. Roget Dict. Electr. Terms (ed. 2) 77/1 Cyclograph, a name sometimes given to an instrument with an optical or electron-jet ‘pointer’ moving in two dimensions under control respectively of different variables.
1940 Chambers's Techn. Dict. 220/1 Cyclograph, an instrument in which a beam of light or cathode rays is made to move under the action of two controlling forces at right-angles to each other, thereby producing a closed figure (cyclogram) on the screen.
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