telharmoniumn.
/ˌtɛlhɑːˈməʊnɪəm/ An electrophonic instrument, invented by the American scientist Thaddeus Cahill (1867–1934) and designed to produce tones for transmission over telephone wires by means of rotating electro-magnetic generators.
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society > communication > telecommunication > telegraphy or telephony > telephony > telephone equipment > [noun] > exchange > exchange equipment
private line1852
bank1884
call-disc1884
howler1886
trunk1889
multiple switchboard1891
rack1893
line switch1898
heat coil1900
relay rack1902
multiple1905
listening key1906
telharmonium1906
wiper1906
preselector1912
line finder1922
rank1924
routiner1928
keysender1929
uniselector1930
wiper arm1933
1906 Chambers's Jrnl. June 495/1 In the telharmonium the qualifying ripples are ingeniously added to the waves of the fundamental note by a separate contrivance.
1934 N.Y. Times 13 Apr. 19/1 Thaddeus Cahill, who invented an electric typewriter and the device for producing music electrically, known as the telharmonium, died suddenly at 10 o'clock yesterday of a heart attack.
1978 P. Griffiths Conc. Hist. Mod. Music viii. 111 The pioneer..was Thaddeus Cahill, a Canadian scientist who demonstrated an extraordinarily bulky ‘telharmonium’ in 1906.
This entry has not yet been fully updated (first published 1986; most recently modified version published online March 2018).
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n.1906