Hi Dave,
Your belief is correct. GW Pickard¡¯s patent 836531 shows an early version of what later became the standard diode symbol. The anode and cathode assignments happened later ¡ª initially, it was just ¡°pointy thing means catswhisker, rectangle means rock¡±.
¡ª°ä³ó±ð±ð°ù²õ,
Tom
Sent from my iThing, so please forgive typos and brevity.
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On Feb 13, 2022, at 3:30 PM, Dave Wright <davewrightsplace@...> wrote:
?OK, we have replaced the diode in our 8471A, and learned a few things along the way. In my preceding descriptions, I had Anode and Cathode reversed (for the standard Negative Output model). It is interesting, as in looking at the diode, you can clearly see the 'cat whisker' connection to the die, and that (I believe) is what begat the schematic symbol. _._,_._,_
