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(...) I found this picture on my brickshelf account. It shows the lego geometry needed to implement the four port switch. The hoses are not right, but the switch positions and lever linkages are correct. (URL) (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) I'm not at home, so I can't lookup the history on this in my LEGO notebooks. I think Doug Carlson invented this. I rederived it today, because I knew it wasn't too complicated. It involves four switches and four T's. The four switches form two (...) (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) Hi Billy, A LEGO pneumatic switch has four ports. You are probably familiar with the obvious three: left, center and right. The fourth port is not obvious. When you've got pressure on one port of the piston, and you switch the switch so you (...) (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Random Pneumatic idea/question
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(...) Is it now? Hmmmmmm. How would one go about hooking these switches to access the fourth port? Is there a website that I can visit that would give a good explanation to this? With thanks, Billy. (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Pneumatic Questions
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(...) I know this sounds a little naive, but what is a release-free switch, and what would it be used for? Billy. (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Pneumatic Questions
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(...) Ahhh, I would love to see it done :-) CS (19 years ago, 20-Nov-05, to lugnet.technic, FTX)
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| | Re: Random Pneumatic idea/question
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(...) Yes, the fourth port is an issue. It is possible to hook multiple switches to give you access to the fourth port though. (...) Kevin (19 years ago, 20-Nov-05, to lugnet.technic)
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| | Re: Other pneumatic questions.
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(...) That makes sense. I guess that over a long circuit the air in the system would loose its... uh... effectiveness at accurately sending and recieving the information from the RAM device, (I guess thats how you would say it.) and that a purely (...) (19 years ago, 19-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) Speaking of liquids, Is it possible to replace the air in the pneumatic system to make a hydraulic system. I mean by using something like, oh say, 10 WT silicone oil? (URL) I guess not since you can't complete the circuit because of the (...) (19 years ago, 19-Nov-05, to lugnet.technic)
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| | Re: Random Pneumatic idea/question
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(...) Hi Nathan, It is possible to make a sprayer using pneumatics. Imagine how a super soaker works. You have a water tank, and an air pressure tank. You pump up pressure in the air pressure tank. Once you release that pressure, the water is (...) (19 years ago, 19-Nov-05, to lugnet.technic)
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