Thanks for that - before my time tho'
On 26 October 2010 22:43, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>wrote:
> Ah, Marconi. Here's a little piece of local Marconi history.
> <http://www.everythingradio.com/Marconi%20Tower.htm>
> Somewhere I have a much better photo but it's not on my site.
>
> Chuck Norcutt
>
>
> On 10/26/2010 4:31 PM, Jez Cunningham wrote:
> > As an apprentice (while doing a year in industry before going to
> > university - a so-called thick-sandwich course - one of my assignments
> > was in the inspection team in a metalworking section. This was 1970/1
> > and the company (Marconi) had recently switched to 'unified' threads.
> > All our equipment racks (for Royal Navy radio gear) had warning labels
> > attached "Some threads are unified" (which we sang to the tune of La
> > Donna e Mobile from Rigoletto).
> >
> > Up to that time a huge mixture of threads had been used and moving to
> > UNC/UNF was a great simplification. Of course moving to metric
> > sometime later was even 'better'.
> >
> > As I recall, there is a one-way compatibility between some sizes - but
> > it was what we called a 'rattling good fit'. The other way was ok for
> > a few turns but could bind. All down to the thread angles...
> --
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