It looks to me to be the long (expensive) way around a solution as near as an 
inexpensive Radio Shack Candy Store SPDT micro switch activated by the switch 
throwbar to change the frog polarity whenever the switch is thrown. Extremely 
simple, reliable, and inexpensive.

I have three on the double-slip switch at Terminal District that not only 
govern frog polarity, but also route polarity leading into the switch from 
either the North Main, or via a switch to the South Main, depending on how the 
double slip switch is lined. 

If that isn't enough, I have a crossover from North to South Main ahead of the 
switch from the South Main to the double slip switch double slip switch, and 
the power on short stretch of track there is controlled by a micro switch 
attached to the South Main crossover switch. 

So, in effect, this area is a simple interlocking wherein setting up route 
power is as simple as lining a route through the switches, The routes into the 
double slip switch receive power from either the North Main or the South Main, 
or from the North Main exclusively. It works, but you'd have to see it to 
understand it. However, the point is, it's all done with micro switches.

Bob Nicholson  ________________________________________



--- In [email protected], "Bill Lane" <bill@...> wrote:
>
> All,
> 
>  
> 
> I read the description of the Frog juicer & am still trying to understand
> why it is useful. Perhaps since I am not using any accessory decoders
> (throwing turnouts?) it is not for me. 
> 
>  
> 
>  
> 
>  
> 
> Thank You,
> Bill Lane
> 
> Modeling the Mighty Pennsy & PRSL in 1957 in S Scale since 1988
> 
> See my finished models at:
>  <http://www.lanestrains.com/> http://www.lanestrains.com
> Look at what has been made in PRR in S Scale!
> 
> Custom Train Parts Design
>  <http://www.lanestrains.com/SolidWorks_Modeling.htm>
> http://www.lanestrains.com/SolidWorks_Modeling.htm
> 
> PRR Builders Photos Bought, Sold & Traded
> (Trading is MUCH preferred)
>  <http://www.lanestrains.com/PRRphotos.xls>
> http://www.lanestrains.com/PRRphotos.xls 
> 
> ***Join the PRR T&HS***
> The other members are not ALL like me!
>  <http://www.prrths.com/> http://www.prrths.com
>  <http://www.lanestrains.com/PRRTHS_Application.pdf>
> http://www.lanestrains.com/PRRTHS_Application.pdf
> 
> Join the Pennsylvania Reading Seashore Lines Historical Society
> It's FREE to join!  <http://www.prslhs.com/> http://www.prslhs.com 
> Preserving The Memory Of The PRSL
> 
>  
> 
> 
> 
> [Non-text portions of this message have been removed]
>




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