These original Kirt's Cogitations™ may be reproduced
(no more than 5, please) provided proper credit is given to me, Kirt Blattenberger.
here to return to the Table of Contents.
Cog·i·ta·tion [koj-i-tey'-shun] – noun: Concerted
reflection; meditation; contemplation.
Kirt [kert] – proper noun: RF Cafe webmaster.
Early Leakage Currents
The telegraph system, which performed remarkably well over
long distances in the arid American west, was greatly limited in distance when installed on the humid east coast.
Leakage currents through the water-impregnated wire insulation greatly attenuated the signals, especially when
buried underground. To cure the problem, Sir William Thompson invented gutta-percha insulation, and in 1847
designed a screw-press for coating the wires with the gum rendered plastic by heat.