MIKE ROSS wrote in a message to Roy J. Tellason:

 MR> "Roy J. Tellason" wrote to "Greg Mayman" (19
Dec 02  04:06:08)  ---
 MR> on the topic of "DIGITAL CLOCKS"

 RJT> Greg Mayman wrote in a message to Roy J. Tellason:
 GM> Yup, 7490 counters. And some stages had feedback to reset the clock
 GM> on 0110 so it would divide by 6 for tens of minutes/seconds.

 RJT> Or use a 7492 instead,  /2 and /6!

 GM> And 7447 decoder/drivers.

 RJT> Yep.

 MR> Oh, just remembered there was a cmos ic a 4566 called an
 MR> "industrial timebase" which consisted of 2 BCD dividers. One was a
 MR> divide by 10 and the other a divide by 5 or 6. Connected to sample
 MR> the powerline it could divide by 50 or 60 for driving clocks 1
 MR> pulse per second or by 5 or 6 for 10 pulses per second in finer
 MR> increments. Similarly it could divide by 12 or 15 if one really
 MR> wanted it.

Sounds like a handy part to have,  though I don't think I've ever run
across that particular number before.  Do you happen to recall who made it?

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