Order from a Major Online Bookstore
Ultimate Book Price Comparison Engine
Save Your Time And Money
| AnyBook4Less.com | Order from a Major Online Bookstore |
|
| Home | Store List | FAQ | Contact Us | | ||
| Ultimate Book Price Comparison Engine Save Your Time And Money |
||
 |
Title: Make Your Own Working Paper Clock by James Rudolph ISBN: 0-06-091066-6 Publisher: Perennial Pub. Date: 01 September, 1983 Format: Paperback Volumes: 1 List Price(USD): $16.95 |
Average Customer Rating: 4.17 (12 reviews)
Rating: 3
Summary: Provides insight into working of clocks
Comment: As the author claimed, you cut the book into about 160 peices then glue and assemble them into a working clock. I just finished making my clock. It didn't work. The pinions and gears just didn't mesh right. There must be tricks to get the precision of alignment necessary for the clock to run, but the author revealed none of them. Lining things up by eye, and being very careful just isn't enough. I was surprised to read other reviews where the clocks worked. Even so, I was amazed at the engineering of these paper parts, and am considering ordering a couple more books from which to re make parts (the author recommends this from the start). At the very least, reading this book, and making the clock from it, will leave one with a very good understanding of how such clocks work, but not necessarily an understanding of how to make clocks that work.
Rating: 5
Summary: A very good book!
Comment: This project requires considerable time and patience but you *can* end up with a clock that really works. As previously mentioned I think the best strategy to to work about an hour or so each evening, it took me too months to complete the clock with extra hours on weekends. It works! The key is the gears. The main issue is the concentricity of the gear wheels -- in other words, their outer edge rotates a constant distance from the center. Get this wrong and the wheels will bind as they rotate against one another. Two problems: finding the center, and constructing the gear wheels consistently. The first gear you meet is the main drive wheel, it took me a week to construct. Put an axl in it and spin it to make sure it's concentric as you build. Make sure the inner mesh gears of the secondary gear (and others) are consistent (no teeth wider or narrower than others, trim them with a exacto knife if needed. Tip: they should be bent into an straight accordian shape before glue, this way you can see that all teetch are even. The main gear and secondary innner gear are most important -- up to the escapement. The later hand gears are no problem. Once complete you need to patch, trim, reposition axles, cut... Note that on the book cover the squished main gear teeth that the author adjusted to make the wheel concentric!
Rating: 4
Summary: A great project - even if it doesn't work
Comment: I just finished making the clock - in an overly hasty fashion, but as accurate as I could possibly do it. It will click for about 4-5 "seconds" and the pendulum will slowly stop swinging. I've adjusted every wheel and axle 50 times but can't figure out what's holding up the mechanism. It was still worth it, though. What I found to work for the bearings instead of beads, which would be hard to find the exact right size, was to use small aluminum tubing from the hardware store. I brought along a piece of wire and the knitting needle and tried two sizes that fit very well - 3/32" and 1/8" worked well. For the main wheels, the tubes are pushed all the way through (and cut closely, pinching the ends back open after cutting with wire cutters) and will spin very well. Also, the cork idea in the minute hand did NOT work - I spent 5 hours on the damn part, only to realize that the needle would always slip around the cork piece and turn crooked. I tried sponge too, but eventually just used a little longer needle and made up a piece on the very front tip to allow the end to enter, and glued. All the pieces work, but I agree with other reviewers that more precision is needed in determining the center of circles - you can adjust wobble, but it's very difficult to find out exactly which way to adjust it. I might try again in a few years! Also - pennies work well in the weight - so you don't have to go buy lead shot.
Thank you for visiting www.AnyBook4Less.com and enjoy your savings!
Copyright� 2001-2021 Send your comments
