Relay computers

[Tony Duell]

> 
> And slugged relays, with a big metal ring in the coil.  These either 
> delay opening or closing, but I can't remember which way round it works. 

I believe (without running upstairs to look in 'Telephony' [1]) that you 
can arrange for either a slow make or a slow release

[1] A great 2-volume set on the UK telephone system, mine is the 1933 
edition IIRC. They contain _complete_ schematics for telephone exchanges 
(Well, OK, the circuit for each line is drawn once, not <n> times, but 
you know what I mean). They were the books that finally let me understand 
how telephgone exchanges work, and proved to me the dangers of giving a 
simplified explanation (in that I'd read plenty of simplified books on 
how telephone systems work and couldn't make any sense of them).

-tony