Re: "lost" trains

[Andrew Price <aprice@mail.dotcom.fr>]

On Tue, 28 Dec 1999 00:13:32 +1100, "Notagunzel"
<notagunzel@bigfoot.com> wrote:

>Stuart Ellis <mpp@zipworld.com.au> wrote in message
>38654D90.853C775A@zipworld.com.au">news:38654D90.853C775A@zipworld.com.au...
>>  The DPU devices are now quite common in the inner Sydney area, ie
>Sydenham,
>> ESR, and the City circle. The primary purpose of introducing these devices
>is to
>> shorten the length of a track circuit without going to all the expense of
>> installing extra track circuits. Especially where there is a  need for
>close
>> running of trains, ie the ESR line, and city circle line.
>
>Ummm..., these may not be like the Track Shunt Assistors I was talking
>about.  Are they used with Jointless Track Circuits?  If so, I think they
>are also called Pin Point Detectors.

That's what they sound like to me, too.  Are they triangular-shaped
plastic boxes aligned with the rails?