Archived posting to the Leica Users Group, 2000/11/11

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Subject: Re: [Leica] mechanical shutters
From: Javier Perez <summarex@yahoo.com>
Date: Sat, 11 Nov 2000 08:16:26 -0500
References: <B62F599A.90FF%howard.390@osu.edu> <3A0A9FB3.1462B8C8@primus.com.au> <3A0BA5C4.4F7E45F9@yahoo.com> <3A0BCED1.4B1F5C61@primus.com.au>

Good One!
Javier


"A.H.SCHMIDT" wrote:

> Javier Perez wrote:
> Snip
>
> > . I think the
> > Industrial engineers invented the MTBF concept just for this sort of thing.
> >
> > Javier
>
> Javier, This reminds me, of the time I worked for ITT in Germany. At this time, we
> developed the first microprocessor operated telemetry system used in Germany (I believe
> in the world, but are not 100% sure)
>
> It used an 8080 Processor, 4Kb of Rom and 16Kb of Ram together wit some other Small
> scale IC's, relays and resistors and Capacitors. The time was about 1978.
> The statistics department was asked to work out the MTBF figure for the whole setup.
> Using data supplied by the individual component manufacturers.
> This setup  consisted of about 16 of the above mentioned boards, some power supplies
> and a big 19" rack. The outcome was:
>
>                                           2.5Hrs (Two point five)
>
> We received somewhat of a shock. However the system was build, and as I understand, It
> still works to day (running 24 Hrs a day)  without failure. Roughly 3 Million 197
> thousand 4 hundred  years later.
>
> So much for MTBF.
>
> Regards, Horst Schmidt


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In reply to: Message from Martin Howard <howard.390@osu.edu> (Re: [Leica] mechanical shutters)
Message from "A.H.SCHMIDT" <horsts@primus.com.au> (Re: [Leica] mechanical shutters)
Message from Javier Perez <summarex@yahoo.com> (Re: [Leica] mechanical shutters)
Message from "A.H.SCHMIDT" <horsts@primus.com.au> (Re: [Leica] mechanical shutters)