[NJARC] Eccles-Jordan flip flop

[Rob Flory]

 There was a a time I was interested in trying to recreate a counter using
this circuit as a building block, using 6SN7 dual triodes.  It never made
it off the notepad and onto the breadboard.

I had reasons to think 6SN7 was a good choice, among others taking half the
space of using single triode tubes like 6J5.  I also may have seen diagrams
or examples of historic bits of computers using them.

Grandpa made what had to be one of the first all-electronic clocks at RCA
before WWII.  They were messing around with counters, timers, and
multipliers for the military.

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&
Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.
htm&r=1&f=G&l=50&s1=2410156.PN.&OS=PN/2410156&RS=PN/2410156

Click the button that says images.  Earlier patents show on USPTO as scans,
not OCR like later ones.

RF
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