The Bicycle Chain Clock mk2

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After a family trip to visit our relatives, my father brought back a full mechanical Smiths Enfield clock. Unfortunately it wasn’t working properly, so we decided to spend some father and son bonding time repairing it.

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The Smiths Enfield from ‘Great Britain’ it was written.
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My father carefully removing the gears for diagnosis.
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We discovered it was just the locking pin borken. It was fixed with a hair pin and epoxy.

Fast forward to the bicycle chain clock mk1, a semi completed project concept using chain position to tell the time. I have always thinking about getting a servo with Adruino / Raspberry Pi micro computer to program a functional clock speed, but it was never fulfilled since 2013. Now we have a working mechanical clock but not calibrated to the time we want… isn’t that perfect timing I should assemble this with the chain concept where theoretically I could calibrate to the desirable rate of  rotation?! The mk2 project is completed within a day cutting acrylic and put things together.

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The completed chain clock with new design than mk1, next to my 31 years old vintage Italian road bike.

 

Left: Different from first prototype, I placed a larger cassette gear instead of the derailleur to add variations. The core was 3D printed to fit in a rotating shaft.

Right: Similar to mk1, you can tell the time from the position of the ugly red pin I anyhow picked. I should spend some time to look for a better looking solution.. The time between each cut on the acrylic is exactly 1 hour. The prototype 2’s grooves aren’t very visible, this is also something that can be improved with colored lines.

 

Above video was shot with a borrowed Panasonic GH4 and Olympus EM1.

Hope you like this project! I would like to thank my father for sharing his experience back in his high school days working as a clock smith. If you have some feedback and suggestions please leave it in the comments below!

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