Subject:
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Re: Working LEGO Clock Tower
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 2 Apr 2003 22:04:30 GMT
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Viewed:
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1290 times
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Good job. Even since recently annoucing that I got my grandfather clock up to
30 mours in weight/runtime, I still have frustrations with it (it now decides
to stop at will, etc).
The 4-face gearworks is a great innovation.
eric
In lugnet.announce.moc, Chris Phillips writes:
> Inspired by the works of Leo Dorst and Eric Harshbarger, I set out to build
> a working clock mechanism in a form factor that could be displayed on a
> train layout. The result of this two-week effort is my LEGO Clock Tower,
> which made its debut on NELUG's train layout at the Greenberg train show
> this past weekend. Except for a two-pound weight and a length of cotton
> twine, the entire clock mechanism is made out of unmodified, non-electric
> LEGO pieces.
>
> I am working on a complete write-up about this project, but here are a few
> preliminary pictures:
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=38950
>
> The top portion of the tower (above the windows) contains the complete clock
> mechanism, and can be separated into functional layers for easier
> maintainance. The head of the clock tower contains four identical clock
> faces that are geared together at their minute hand axles. The pulley (a
> wheel hub) and gear train are located in the top half of the tower shaft,
> and the pendulum and weight hang down the remainder of the shaft and through
> a cutout in the display table. A pair of eye hooks attached to the
> underside of the table allow me to hang the weight at a slight horizontal
> offset to prevent it from interfering with the pendulum motion.
>
> As built, the clock keeps reasonably accurate time. During the train show,
> it was rarely more than 3-5 minutes off the correct time, although for a
> variety of reasons the clock did not run continuously for any single stretch
> of more than a couple of hours without needing to be wound/restarted/reset.
> I am still fine-tuning the mechanism to improve the accuracy of the
> timepiece, to lengthen the run-time between windings, and to reduce the
> weight needed to drive the clock.
>
> Before I forget, if anyone knows of a good minifig-scale pest control
> service please let me know -- I've got bats in my belfry!
>
> - Chris.
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Message has 1 Reply:
 | | Re: Working LEGO Clock Tower
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| (...) Wow, thanks! I found that every time I rebuilt the mechanism (and I did this a bit more often than I would have chosen) I had to go through a whole checklist to make sure that there were no friction problems in the gear train and that the (...) (21 years ago, 3-Apr-03, to lugnet.technic)
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