[Elecraft] coaxial-cable patent# 1407 on 6apr1880.

[John Langdon]

Heaviside only applied for one patent, but it was a big one. He never collected any royalties on it, and all of his other inventions were published without patent protection, as he thought it his duty share his knowledge.  He started out as a telegrapher, and began developed his math skills by finding faults in undersea cables.  A truly amazing fellow.

For the best book I have found about that era, try "The Maxwellians" by Bruce Hunt, available on Amazon.

73 John N5CQ


-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of JEROME SODUS
Sent: Saturday, January 19, 2019 10:59 PM
To: elecraft at mailman.qth.net
Subject: [Elecraft] coaxial-cable patent# 1407 on 6apr1880.

Hello,


Walter K6WRU has written, "I think we take coaxial cable for granted. It was a brilliant invention and a real gift to people who love radio. Maybe I?ll start celebrating December 8th as Coaxial Cable Day.
https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.wired.com%2F2009%2F12%2F1208coaxial-cable-patent%2F&amp;data=02%7C01%7C%7C3f171467c8c94095c83e08d67e949db9%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636835574096449183&amp;sdata=d%2BDAeXNVRUv29D0erqw%2FBdpdkMJpfAFwdlUF%2FbJaFm4%3D&amp;reserved=0"

Well, Walter, perhaps April 6th may be a better date to celebrate because an English fellow, Oliver Heaviside, was granted patent# 1407 on 6-apr-1880 for a coaxial-cable. That's some 51 years earlier.


We owe a debt of gratitude to Heaviside; some examples....

He developed the Transmission-Line theory; so important to hams.

Hams, who are electronic-engineers, know about Maxwell's equations; in truth, they are Heaviside's equations and they are so elegant in their simplicity, having replaced twelve of Maxwell's twenty equations. Maxwell's were so complicated that Heaviside set them aside and developed his four from a different starting point.

Heaviside predicted there must be, in the atmosphere, a conducting layer to let radio waves to follow the Earth's curvature.

Heaviside coined words that we take for granted, some examples....inductance, impedance, permeability, permittivity, admittance, susceptance.

Circuit-Analysis, that I used daily in my design work, was started by Heaviside.


73 Jerry KM3K  

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