Post by lovnvintage on Jun 15, 2012 10:48:16 GMT -5
In the 72 sob I purchased I found it has this system. Does anybody know anything about them? It appears that the model in this trailer had a controller that mounted on the hauling vehicles dash. I have the original paperwork for the system and says it is made by thetford. Just curious if anyone has any knowledge of them, waiting to hear back from thetford regarding questions on it.
Post by mountainkimmie on Jun 15, 2012 18:55:12 GMT -5
Wow! This is fascinating. The manual says "These two new systems convert recreational vehicles into mobile, pollution-free waste destruction plants." Well sign me up!
I'm dying to know how they work (and *if* they worked). The manual doesn't really seem to explain exactly *where* the waste goes. Somewhere around the exhaust manifold? I'd love to see you get it operational and give us a video demonstration, lovnvintage. My inner skeptic thinks this might have been one of those marvelously optimistic ideas of an earlier era which didn't quite work out or else had some gotcha' not mentioned in the sales material, LOL! But if I had one I'd be dying to fire it up.
Post by lovnvintage on Jun 15, 2012 19:07:44 GMT -5
mountainkimmie, when I googled it I know it pulled up all kinds of medical waste info. And on the thetford site they still list them. I acutally have the pamplet that came with my trailer. It ( the pamplet)says it captures the heat from the engines exhaust and uses it to disintegrate the waste. I will try and scan the pamplet or take a pic. The problem with mine is there was the control that evidentally was installed in the towing vehicle-so who knows where that could be! I am hoping they will be able to help me with some type replacement. If you go onto the thetford site you will see the new ones they sell.
Post by lovnvintage on Jun 15, 2012 19:45:44 GMT -5
I will have to check that one out when I get on the old pc, my laptop is giving me fits with downloads. I hope the system is complete except for the control and then hopefully they have some type that will work with the old system. Gotta get my brother in law plumber over to check it out for me.
Judging by the pre-computer age of the system, and the looks of that "control panel", I'd say it is not a very complex control system. It's basically an on-off switch for the pump with two inputs, one for exhaust temp at the hose connection point and one from the transmission for speed input. I'd bet any electronics geek like a college EE student who's into making little USB chargers and things could make one if he knew the parameters.
There's an electronic circuit module that's famous among all the inventive electronics kids, I can't remember the name of it. It's like the DaVinci Module, or the Zodiac Module, or the Aquarius Module, some single name like that. Anyway, it's designed to interface with all kinds of different inputs like electric eyes, temp sensors, speed sensors, can combine multiple inputs, and can control motors, switches, anything you want. If you could find some electronics hackers/modder/inventors and had the required info, they could whip one up for you in about an hour.
Update: Aha! I finally got the right search terms, it's called an Arduino Module. You can see how easy it is to make many different things from it here:http://www.buildcircuit.com/
Heck, you could stick the thermocouple from a digital multimeter into the exhaust pipe right next to the hose connection and read the temp just like I did when I tested my oven temp, rig up an on/off switch to the pump, and monitor temp and speed yourself to know when to turn it off or on.