fly-backn.

Brit.

/ˈflʌɪbak/, U.S.

/ˈflaɪˌbæk/

Etymology: < verbal phrase to fly back (see fly v.¹ 9c).

1. In a stop-watch or chronograph, the return of the hands to zero. Usually attributive.

ΘΚΠ

the world > time > instruments for measuring time > [noun] > timer or chronograph > return of hands to zero

fly-back1888

the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > waveform > types of waveform > portion of saw tooth

fly-back1888

1888 London, Edinb. & Dublin Philos. Mag. 5th Ser. 25 263 The fly-back chronograph enables time to be measured to ¹/ ₅th second, without taking the eye for one moment off the object to be watched.

1903 F. J. Garrard Watch Repairing xix. 200 (caption) Fly-back work of chronograph.

1923 W. I. Milham Time & Timekeepers xv. 250 A double split-second fly back stop watch..gets out of order quite easily.

1929 G. H. Baillie Watches x. 233 A watch with fly-back minute hand, which..flies back to 0 as soon as it reaches 60.

1953 W. J. Gazeley Watch & Clock Making xiv. 315 Another arrangement met with in some stop watches..is where a separate push-piece is used for the fly-back action.

2. (a) The return of the scanning spot in a cathode-ray tube to the starting point after the end of a line or frame. Frequently attributive. (b) The portion of each cycle of a saw-tooth wave-form in which the signal diminishes.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] > line or pattern on screen > movement of spot produced by beam > return to start

fly-back1934

1934 Jrnl. Inst. Electr. Engineers 75 66/1 The arrangement..constitutes a time base which provides a scanning sweep..and a rapid fly-back.

1948 T. Soller et al. Cathode Ray Tube Displays iv. 133 The flat portion [of the waveform] is the ‘quiescent’ voltage and the portion that follows the rise is the ‘return’ or ‘flyback’.

1950 Electronic Engin. 22 55 The flyback time in these tests was about one-seventh of the sweep time.

1957 S. W. Amos & D. C. Birkinshaw Television Engin. I. i. 15 During the time occupied by each horizontal traverse and fly~back the beam moves downwards.

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).

单词	fly-back
释义	fly-backn. Brit. /ˈflʌɪbak/, U.S. /ˈflaɪˌbæk/ Etymology: < verbal phrase to fly back (see fly v.¹ 9c). 1. In a stop-watch or chronograph, the return of the hands to zero. Usually attributive. ΘΚΠ the world > time > instruments for measuring time > [noun] > timer or chronograph > return of hands to zero fly-back1888 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > waveform > types of waveform > portion of saw tooth fly-back1888 1888 London, Edinb. & Dublin Philos. Mag. 5th Ser. 25 263 The fly-back chronograph enables time to be measured to ¹/ ₅th second, without taking the eye for one moment off the object to be watched. 1903 F. J. Garrard Watch Repairing xix. 200 (caption) Fly-back work of chronograph. 1923 W. I. Milham Time & Timekeepers xv. 250 A double split-second fly back stop watch..gets out of order quite easily. 1929 G. H. Baillie Watches x. 233 A watch with fly-back minute hand, which..flies back to 0 as soon as it reaches 60. 1953 W. J. Gazeley Watch & Clock Making xiv. 315 Another arrangement met with in some stop watches..is where a separate push-piece is used for the fly-back action. 2. (a) The return of the scanning spot in a cathode-ray tube to the starting point after the end of a line or frame. Frequently attributive. (b) The portion of each cycle of a saw-tooth wave-form in which the signal diminishes. ΘΚΠ the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > cathode-ray tube > [noun] > line or pattern on screen > movement of spot produced by beam > return to start fly-back1934 1934 Jrnl. Inst. Electr. Engineers 75 66/1 The arrangement..constitutes a time base which provides a scanning sweep..and a rapid fly-back. 1948 T. Soller et al. Cathode Ray Tube Displays iv. 133 The flat portion [of the waveform] is the ‘quiescent’ voltage and the portion that follows the rise is the ‘return’ or ‘flyback’. 1950 Electronic Engin. 22 55 The flyback time in these tests was about one-seventh of the sweep time. 1957 S. W. Amos & D. C. Birkinshaw Television Engin. I. i. 15 During the time occupied by each horizontal traverse and fly~back the beam moves downwards. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022). < n.1888
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