Pupinn.
/pjuːˈpiːn/, U.S. /pjuˈpin/ Telephony.
1. attributive and in the genitive. Designating equipment, methods, and principles introduced by Pupin in relation to telephone cables. Now rare.
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1900 Amer. Jrnl. Sci. 160 64 Pupin's interrupter may be modified to serve as an alternator in the following way.
1901 Sci. Abstr.: Physics & Electr. Engin. 4 1043 An intermittent direct current is produced by means of a Pupin interrupter.
1934 A. L. Albert Electr. Communication xi. 282 It remained for Pupin successfully to solve the difficult problem of loading... His method is known as the series or Pupin system of loading.
2. Pupin cable n. a telephone cable provided with loading coils at regular intervals so as to reduce attenuation and distortion of the signal. Now historical.
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society > communication > telecommunication > telegraphy or telephony > [noun] > line
wire1813
line1847
wire line1848
loop1863
landline1865
saddle wire1876
telephone line1877
concentric cable1888
Pupin cable1904
multiple twin1922
quad1922
twisted pair1923
star quad1927
music line1929
coaxial cable1934
coax1945
1904 N.Y. Electr. Handbk. (Amer. Inst. Electr. Engineers) 119 Within an hour and a half after the accident, the long distance wires in the Pupin cable were working.
1994 Technol. & Culture 35 147 In 1910 the 40-km Pupin cable was laid across the Channel from Abbot's Cliff to Grisnez in France.
3. Pupin coil n. = loading coil n. at loading n. Compounds 2. Now historical.
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society > communication > telecommunication > telegraphy or telephony > [noun] > line > inductance coil
loading coil1901
Pupin coil1905
1905 Sci. Abstr. B. 8 352 An adjacent insulator carries a vacuum lightning discharger contained in an ebonite case, to protect the Pupin coil from damage.
1926 Clearfield (Pa.) Progress 10 Mar. 6/4 A subsequent development of importance was the Pupin coil, which greatly extended the limits of effective voice transmission.
1992 E. Noam Telecommunications in Europe vii. 72 Michael Pupin, a Columbia University professor, developed the so-called Pupin coil, which greatly improved the amplification of signals.
4. Pupin's law n. a law stating that a non-uniform cable provided with loading coils at regular intervals transmits a signal in the same way as a uniform cable, provided the distance between the loading coils is sufficiently small. rare.
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1911 J. A. Fleming Propagation Electr. Currents iv. 122 Pupin reduced the solution of the problem to a verbal statement, which may be called Pupin's Law, as follows: If there be a non-uniform cable line loaded with inductance coils at equal intervals, [etc.].
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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n.1900