Al Buxton, W8NX, wrote several articles in 'QST' (and at least one in 'QEX') in which he described the design and construction of HF dipoles that used traps to allow operation on more than one ham band.///
(background)
I've been doing some research on the use of traps in antenna design and I noticed that Al's articles ceased several years ago (I believe his last was in 2007).
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I did some searching and found this on-line entry about Al's passing :
https://www.legacy.com/obituaries/Ohio/obituary.aspx?page=lifestory&pid=154866236
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(signed)
Paul N. Nix, WB5AGF
Dec 21, 2018
Background information about Al (such as - he worked as an engineer for Goodyear Aerospace and as a university professor) can be found in the 'Legacy' entry about him - https://www.legacy.com/obituaries/Ohio/obituary.aspx?page=lifestory&pid=154866236