I would like to build a weight-driven clock, but I have not had any success finding good, easily understandable resources about clock construction/mechanics.  Also, I would like to find a place to get the materials (like a pre-built escapement, etc).  Any ideas?
203785
The link to Howstuffworks has good illustrations for a pendulum clock.  You may be able to improvise the parts for a project if you understand what is involved.  I know, a sundial would be easier.  Good luck.
188808
Who knew?  Is there anything not online anymore?  Try the sheet metal directory!  Seriously!  Link below in source.
491760
There is a fair selection between these websites\nGood luck\n\nhttp://www.library.fau.edu/depts/ref/rsguide/mechanical/content.htm\nhttp://www.intute.ac.uk/sciences/cgi-bin/browse.pl?id=170
32173
hi there, i have a great webpage for you.\n\nthis guy built a "periodic table table" - a big table in his garage made out of wood, and a storage space underneath each element in the table that can be opened up.  inside the box he has stored various samples of that element.  all of this information is online, and includes pictures and information including the price he paid for each one.  it's great.\n\nhere's the site:\nhttp://theodoregray.com/PeriodicTable/\n\nscroll down a bit and click somewhere on the wooden table to see what he has for that element.\n\nEDIT:  i guess i should add, a lot of his samples are listed as "donated" but usually include a link to whatever supplier donated them, and i think you could probably follow the link to find out the cost. \n\nmore info here: \nhttp://theodoregray.com/PeriodicTable/HowToGetOne.html\n\ncheers!
442635
First off, try to hook up with someone from the Society for Creative Anachronism:\nhttp://www.sca.org/\n\nThey are heavily involved in putting on renaisance fairs, jousting tournaments, and other forms of medieval re-enactments.  There are a great number of top-notch craftsmen of the old arts amongst them who would doubtless be glad to help give you a lot of very practical experience-based advice.\n\nHere are a couple more good places to start:\nhttp://www.geocities.com/scalaska1/mail.html\nhttp://www.realbeer.com/jjpalmer/HowtoChain.html\nhttp://users.frii.com/dnorris/maillearmor.html\n\nMy good friend Mike used to roll, cut, and weave rings into chainmail while we sat around watching TV or engaged in various discussions about all sorts of things -- I helped him a bit though due to my work wasn't able to do so that often.  But it was definitely fun and educational!\n\nWe began with simple butted rings, just because they were easy.  But rather predictably they were also prone to coming unravelled after some use, so he eventually switched to the overlapped form where the ends of each ring are hammered flat and a pin driven into them to hold the ring closed.  I understand the rings of commercially made chainmail are actually spot-welded closed for even greater reliability, but I can't think of any good way to do that at home.
165977
There is a great website on this kind of stuff, check out:\n http://scienceworld.wolfram.com/physics/NewtonsLawofCooling.html\n\nThere is also an equivalent one for mathematics:\n\nhttp://mathworld.wolfram.com/\n\nExcellent resources for basic to advanced theory.
434786
resources are just that...resources...you find them anywhere...hardware stores...in this case maybe marine/scuba stores...grainger sells electric motors for battlebot builders...
227429
Once upon a time my boss asked me to take apart a $10,000 piece of electronic hardware piece by piece. \n\nWhy you ask? \n\nWell you see it had been slightly scratched by someones watch. He wanted to spray paint the scratched piece. \n\nI warned him that I had hardware made by the same brand and they tended to use interlocking pieces later braced by the circuit boards. But he wanted it painted. So I took all 75 screws out. Wouldn't you know it all the pieces interlocked and were held together by the circuit boards. So he asks me to put it back, then cover it with newspapers except for the offending area so we can spray paint it while together.\n\nAll went well and the machine looked great. I thought. He noticed that there was an area where I had let the tape holding the newspaper down go over into the spray painted area. There was a spot about 3-4 mm thick by 3-4 cm long area that could barely be seen. He told me when we had time we'd fix it.\n\nAll this while I still had to attend to my regular duties.
7959
Here are a few:\n\nhttp://www.pcmech.com/byopc/\nhttp://www.daileyint.com/build/\nhttp://www.waterwheel.com/Build_A_PC/build_PC.htm
523050
Don't confuse the workings of clocks with the passage of time. Clocks, like any mechanical device, are prone to errors and can fail over time (no pun intended). The passage of time will happen whether we have clock to measure it or not. That makes no difference.\n\nWe now do have atomic clocks that utilize the radioactive decays of heavy elements as a measure of time and they are accurate to a billionth of a second, but even atomic clocks are NOT 100% accurate. So as with any measurements we make in the process of scientific study, there will be errors. But I think in most cases, the accuracy of an atomic clock is more than acceptable.
613291
hi..yea i got a calendar/clock on mine..its in military time but its pretty kewl cuz it also tells the date and all that..im not sure but i think that the place that i got this calendar/clock also has just plain clocks, let me give u the link so u can look around the site\nwww.123mycodes.com
647989
http://theamericanminerva.com/thetanuepsilon/00Main/Main.html CHECK THIS WEBSITE OUT REALLY RESOURCEFUL
78042
Look at the Eifel Tower or a local steel bridge. A model airplane shop could help with the wood and look at an airplane body frame. \nTo calculate, look for a statics book. Engineers need to know how much force each piece has to hold.
42998
Here are other sites that might help.  Good luck with your project.
582348
websites aren't that trustworthy for accurate scientific advice. I'd recommend finding someone to ask in person... Wilkipedia is good for some basic things, but anything beyond Physics 101 is a crap shoot.  \n\ngood luck
217832
they make equipment that runs on sensors-you start with your foot and a pad and when you release it starts your time-there is a sensor at the other end that stops your time-where to get them I'm not sure-you could try eastbay
1131
There's a small round battery located on the motherboard. This battery keeps the time clock as well as your settings going. The battery usually is a CR2032 battery you can get at any department store. That battery is going dead. This is a very easy job on most computers. If you have any other questions you can email me.\n\nstlouisfan