It looks like the water tank

It looks like the water tank in the old TV series Petticoat Junction that the gals swam in : )

Just an upsized toilet cistern

Hi Motorailer,

The innards are like a beefed up toilet cistern. If you are after a detailed plan, then have a look at  https://www.victorianrailways.net/infastuct/6000galtank.pdf  Even though its from the other side of the world, as a mechanism, it probably would be close to what would have been in Arkansas.

Depending on how the mechanism is set up, as a model on the inlet side you'd probably only see the float on the top of the water. The outlet to the spout would probably be invisible under the water. The float and level indicator is separate and is also shown on that Victorian railways plan in the link. 

I hope that this helps get you started, 

One sketch —

I scanned these from a sketch I have. I can get you more details if needed:

https://www.flickr.com/photos/gmpullman/49223768813/in/album-72157689157947401/

https://www.flickr.com/photos/gmpullman/49224246036/in/album-72157689157947401/

By using the Flickr links you can get a higher-resolution view.

Regards, Ed

THANK YOU!

Thank you gmpullman

These are just what I was looking for!