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The innards consist of a magnetic-bearinged, vacuum-encased flywheel upon which planar axis gimbal is mounted the pointing module. As the Earth rotates, the flywheel precesses and the casing remains pointed in the same non-sidereal direction while the base (on which is painted a 24 hour clock) revolves
around it.
Pull the string every once-in-awhile to keep the flywheel spun up.
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Annotation:
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You'll need a pump to keep the chamber evacuated, so you might
as well use the motor from that to top up the fly wheel. |
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But, surely, this is a calendar, not a clock? |
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You could add some extra goodies to make it a calendar, but currently it's a 24hr clock (okay the backplate actually measures 24h3m56s, but the hand or the backplate is skipped at 00:00, 3m56s worth) |
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Note the outer gimbal needs to have 14'ish degrees of free movement with regards the mounting to allow for Earth's declination. |
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I'm sortof envisioning the "winding" mechanism to be magnetic: wound through the enclosure without being mechanically connected to the flywheel; a vacuum pump wouldn't be part of normal maintenance. |
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[Dub] thanks for sp. correction (1/365.2419 not 1/365.25, anno accidentally deleted), but I'll stick with 365.25 in case I want to use a gear mechanism of 1467 teeth for the skip; the difference is less than 2sec per year. |
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(apologies to [Jutta] for overflowing the dailies buffer by re-editing this anno a few hundred times) § x1 |
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When this idea had its original title did it have that tagline [FlyingToaster]? |
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can't remember what the original title was... "precessional clock" ? changed it a couple minutes after I posted it then I waited for hoouuurs for somebody to get the joke, before adding the summary punchline. Also added a line explaining how it works so it didn't look like a calendar. |
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Ha! And I got it about five seconds before I opened the idea this time. Thank you. |
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The first title was, Narcissistic clock, and I'm ashamed to admit that I didn't get it until seconds before I just asked. |
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[UB] Still wrapping my head around declination, etc. might be able to fit in a precession-correction and a calendar using a cam instead of gears. |
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I wonder why this isn't baked: scientists knew about orbits and (I assume) gyroscopes: 4 minutes a day isn't too bad and it's a consistent daily offset. [edit] never mind: due to friction they would have had to wind it up every 10 minutes in the mid-1800's. |
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If this clock was truely egocentric then the flywheel
would stay staunch and indignantly stationary and its
casing/gimbals would revolve and precess. |
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well, the casing is the egocentric part |
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//You could fashion it in your own image. That might clear up some of the confusion.// |
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Egotistical eccentric escapement by an escaped eccentric egotist ? |
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