Relay computers

From: Tony Duell <>
Date: Sat Sep 25 18:04:41 2004

> 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).

Received on Sat Sep 25 2004 - 18:04:41 BST

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