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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
A current thread leads to some marvelous pictures of old bikes:
http://www.tuttocampybici.com/index.php For the old bikes, choose gallery and click on prewar. You end up he http://www.tuttocampybici.com/browse...php?tag=prewar To save time, I link directly to large images, but you really should start at the home page and browse wildly. Here's some long-pitch block chain: http://www.flickr.com/photo_zoom.gne...2139683&size=o On the bottom run of chain, you can see the short, solid block that connects the long-plate links. (A variant called double-roller chain replaced the solid block with a pair of short links, but you can see that the blocks here are solid.) Note the tiny in-tension chain "stays" and in-tension down "tube" common in antique frame designs. Here's some ordinary long-pitch roller chain on what looks like a 18 front-tooth x 9 rear-tooth setup: http://www.flickr.com/photo_zoom.gne...4095548&size=o It's just modern chain with links twice as long. Note the complicated levers along the down-tube that operate the rear spoon brake, and the absence of a seat-post. Pictures of 3 different shaft drive bikes: First bike, front enclosed, rear rack and pinion exposed (maybe a rear case removed?): http://www.flickr.com/photo_zoom.gne...2140051&size=o Same bike, exposed rear teeth appear to be in good shape: http://www.flickr.com/photo_zoom.gne...2125206&size=o Second shaft-drive bike, front and rear exposed, rear engages forward of axle: http://www.flickr.com/photo_zoom.gne...2139973&size=o Third shaft-drive bike, heavy frame bracing at rear gear, spider-web shock-mount for rear fender, wooden rim: http://www.flickr.com/photo_zoom.gne...2125314&size=o Speaking of wood . . . http://www.flickr.com/photo_zoom.gne...2140385&size=o Timber! http://www.flickr.com/photo_zoom.gne...2124606&size=o The weirdest chain ever seen: http://www.flickr.com/photo_zoom.gne...4095459&size=o How do you measure chain wear on that thing? Note the Schrader or Woods valve and the spider-web shock-mount for the fender. Hope everyone else has as much fun browsing as I did--it's a wonderful site to find on a snowy spring day: http://www.tuttocampybici.com/index.php Cheers, Carl Fogel |
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#3
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Block chain, roller chain, shaft-drive, wood-rim, and world'sweirdest chain
On Fri, 13 Apr 2007 15:30:32 -0500, Tim McNamara wrote:
In article , wrote: The weirdest chain ever seen: http://www.flickr.com/photo_zoom.gne...4095459&size=o How do you measure chain wear on that thing? Note the Schrader or Woods valve and the spider-web shock-mount for the fender. La Chaine Simpson or "The Simpson Chain" which was through to confer some kind of advantage or another. There's a famous poster by Toulouse-Lautrec that features that chain: http://www.yaneff.com/html/plates/pl238.html The Wikipedia entry has a description: http://en.wikipedia.org/wiki/Simpson_Chain It sounds like the long upright links were supposed to leverage and multiply the cyclist's effort. |
#4
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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
a écrit:
The weirdest chain ever seen: http://www.flickr.com/photo_zoom.gne...4095459&size=o That's a Simpson lever chain. You can see a small framed copy of the famous Toulouse-Lautrec poster on the wall behind the bike. http://cycling.ahands.org/simpson.html How do you measure chain wear on that thing? Note the Schrader or Woods valve and the spider-web shock-mount for the fender. That's a skirt guard. James Thomson |
#5
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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
On Fri, 13 Apr 2007 15:30:32 -0500, Tim McNamara
wrote: In article , wrote: The weirdest chain ever seen: http://www.flickr.com/photo_zoom.gne...4095459&size=o How do you measure chain wear on that thing? Note the Schrader or Woods valve and the spider-web shock-mount for the fender. La Chaine Simpson or "The Simpson Chain" which was through to confer some kind of advantage or another. There's a famous poster by Toulouse-Lautrec that features that chain: http://www.yaneff.com/html/plates/pl238.html Dear Tim, Amazingly, the inventor William Spears Simpson, does not appear in the Simpson family tree, part of which may be viewed he http://i19.tinypic.com/2nvw3kg.jpg It does look like something that Homer would design. Cheers, Carl Fogel |
#6
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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
On Fri, 13 Apr 2007 22:47:05 +0200, "James Thomson"
wrote: a écrit: The weirdest chain ever seen: http://www.flickr.com/photo_zoom.gne...4095459&size=o That's a Simpson lever chain. You can see a small framed copy of the famous Toulouse-Lautrec poster on the wall behind the bike. http://cycling.ahands.org/simpson.html How do you measure chain wear on that thing? Note the Schrader or Woods valve and the spider-web shock-mount for the fender. That's a skirt guard. James Thomson Dear James, Aaargh! You're right! Even worse, now that you remind me, I realize that I knew that and had just forgotten it. Cheers, Carl Fogel |
#7
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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
On Apr 13, 1:00 pm, wrote:
A current thread leads to some marvelous pictures of old bikes: http://www.tuttocampybici.com/index.php For the old bikes, choose gallery and click on prewar. You end up he http://www.tuttocampybici.com/browse...php?tag=prewar To save time, I link directly to large images, but you really should start at the home page and browse wildly. Here's some long-pitch block chain: http://www.flickr.com/photo_zoom.gne...2139683&size=o On the bottom run of chain, you can see the short, solid block that connects the long-plate links. (A variant called double-roller chain replaced the solid block with a pair of short links, but you can see that the blocks here are solid.) Note the tiny in-tension chain "stays" and in-tension down "tube" common in antique frame designs. Here's some ordinary long-pitch roller chain on what looks like a 18 front-tooth x 9 rear-tooth setup: http://www.flickr.com/photo_zoom.gne...4095548&size=o It's just modern chain with links twice as long. Note the complicated levers along the down-tube that operate the rear spoon brake, and the absence of a seat-post. Pictures of 3 different shaft drive bikes: First bike, front enclosed, rear rack and pinion exposed (maybe a rear case removed?): http://www.flickr.com/photo_zoom.gne...2140051&size=o Same bike, exposed rear teeth appear to be in good shape: http://www.flickr.com/photo_zoom.gne...2125206&size=o Second shaft-drive bike, front and rear exposed, rear engages forward of axle: http://www.flickr.com/photo_zoom.gne...2139973&size=o Third shaft-drive bike, heavy frame bracing at rear gear, spider-web shock-mount for rear fender, wooden rim: http://www.flickr.com/photo_zoom.gne...2125314&size=o Speaking of wood . . . http://www.flickr.com/photo_zoom.gne...2140385&size=o Timber! http://www.flickr.com/photo_zoom.gne...2124606&size=o The weirdest chain ever seen: http://www.flickr.com/photo_zoom.gne...4095459&size=o How do you measure chain wear on that thing? Note the Schrader or Woods valve and the spider-web shock-mount for the fender. Hope everyone else has as much fun browsing as I did--it's a wonderful site to find on a snowy spring day: http://www.tuttocampybici.com/index.php Cheers, Carl Fogel Note the tiny in-tension chain "stays" and in-tension down "tube" common in antique frame designs. No, no, Carl! They are, not in tension! They stand in compression! Now repeat after me, three times... |
#8
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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
On 13 Apr 2007 19:56:50 -0700, "john" wrote:
On Apr 13, 1:00 pm, wrote: [snip] Here's some long-pitch block chain: http://www.flickr.com/photo_zoom.gne...2139683&size=o On the bottom run of chain, you can see the short, solid block that connects the long-plate links. (A variant called double-roller chain replaced the solid block with a pair of short links, but you can see that the blocks here are solid.) Note the tiny in-tension chain "stays" and in-tension down "tube" common in antique frame designs. [snip] No, no, Carl! They are, not in tension! They stand in compression! Now repeat after me, three times... Dear John, Lest the innocent be misled, here are some drawings from Sharp that show some of the curious in-tension frames that were common before the triumph of the modern double-diamond frame: http://i11.tinypic.com/35mgrif.jpg Click on the lower right for full-size in Explorer. Cheers, Carl Fogel |
#9
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Block chain, roller chain, shaft-drive, wood-rim, and world's weirdest chain
On Apr 14, 12:16 pm, wrote:
On 13 Apr 2007 19:56:50 -0700, "john" wrote: On Apr 13, 1:00 pm, wrote: [snip] Here's some long-pitch block chain: http://www.flickr.com/photo_zoom.gne...2139683&size=o On the bottom run of chain, you can see the short, solid block that connects the long-plate links. (A variant called double-roller chain replaced the solid block with a pair of short links, but you can see that the blocks here are solid.) Note the tiny in-tension chain "stays" and in-tension down "tube" common in antique frame designs. [snip] No, no, Carl! They are, not in tension! They stand in compression! Now repeat after me, three times... Dear John, Lest the innocent be misled, here are some drawings from Sharp that show some of the curious in-tension frames that were common before the triumph of the modern double-diamond frame: http://i11.tinypic.com/35mgrif.jpg Click on the lower right for full-size in Explorer. Cheers, Carl Fogel Of course, Carl I actually agree that the down spokes do stand in compression. You're probably aware of the "Sling Shot" bicycle that's made today using a tension down tube. www.slingshotbikes.com Regards, John |
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