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« Return to Thread: Revision of Two Gear/Two Peg Lunisolar Device
Re: Revision of Two Gear/Two Peg Lunisolar Device
by Brillig
::
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Dear Karl and Calendar People,
I'm not sure if I posted this yet or not, but I have a sketch (drawn
in Google Sketchup) of the device, conceived as a plant hanger.
http://www.pbase.com/victorengel/image/113002829/original
The plant is moved from one hook to the next each day. The
aformentioned pegs are indicated in black and yellow. I've also
thought of coloring the face of the 19-tooth wheel to make the phase
of the moon more obvious. That coloring would move with the short peg.
Additionally, the chain would be made, perhaps of colored glass beads.
The beads would be colored thus (northern hemisphere design -- a plant
hanger is unlikely to change hemispheres):
60 green beads (spring)
60 yellow beads (summer)
58 red beads (fall)
57 blue beads (winter)
These bead numbers should be reasonably accurate to predict the
solstices and equinoxes in the near term. Over the longer term, the
boundaries between the colors may need adjusting by repainting beads,
but the actual bead positions would remain the same since it tracks
the mean tropical year.
Victor
On Thu, May 21, 2009 at 3:35 AM, Palmen, KEV (Karl)
<karl.palmen@...> wrote:
> Dear Victor and Calendar People
>
>
>
> Very clever! Victor uses the small slower moving peg as the new moon mark on
> the moon wheel!
>
> The pegs are moved once every 19 years once every 18*19=342 years the small
> page move one place in the direction that the moon wheel rotates, so forcing
> the sun wheel to turn an extra tooth (as it would do if it slipped against
> the moon wheel).
>
>
>
> This is better than my suggested revision involving an annual moving of the
> pegs and correction by slipping of the sun wheel one tooth against the moon
> wheel.
>
> However my suggestion can be easily modified to produce a 334-year cycle.
>
>
>
> Karl
>
>
>
> 10(08(26 till noon
>
>
>
> From: East Carolina University Calendar discussion List
> [mailto:CALNDR-L@...] On Behalf Of Victor Engel
> Sent: 20 May 2009 23:35
> To: CALNDR-L@...
> Subject: Revision of Two Gear/Two Peg Lunisolar Device
>
>
>
> Dear Karl, Irv and Calendar People,
>
> OK How about this device and operation, which I think is a bit more
> straightforward.
>
> There is a 235-cog gear with one mark near one of the cogs indicating the
> start of a year.
> There is a 19-cog gear with 19 holes used to contain two pegs.
> The two gears interlock and are adjusted relative to each other by rotating
> the 19-cog gear clockwise.
> The pegs consist of one short peg moved rarely, and a long peg moved
> frequently. The frequently moved one is longer so it can be grasped even
> when the short peg is in place. That was my reason for the different lengths
> of pegs earlier, but I didn't mention it.
> Each time the small gear is rotated, it is rotated until the smaller peg is
> closest to the larger gear. One month is considered to have passed at this
> point. While the small gear is being rotated, the new year mark on the large
> gear should be observed. If it passes the point where the small peg finally
> comes to rest during the rotation, then the large peg is moved one hole
> counterclockwise. If the small peg is occupying that hole already, it is
> moved to the spot previously occupied by the large peg, whereupon the large
> peg takes the spot previously occupied by the small peg.
>
> In this way, the tall peg travels counterclockwise around the gear, and the
> small peg travels clockwise around the same gear.
>
> By rotating the gear until the small peg aligns with the large gear,
> adjustments are automatically made by 1/19 month.
>
> Victor
>
> ________________________________
> Scanned by iCritical.
>
I'm not sure if I posted this yet or not, but I have a sketch (drawn
in Google Sketchup) of the device, conceived as a plant hanger.
http://www.pbase.com/victorengel/image/113002829/original
The plant is moved from one hook to the next each day. The
aformentioned pegs are indicated in black and yellow. I've also
thought of coloring the face of the 19-tooth wheel to make the phase
of the moon more obvious. That coloring would move with the short peg.
Additionally, the chain would be made, perhaps of colored glass beads.
The beads would be colored thus (northern hemisphere design -- a plant
hanger is unlikely to change hemispheres):
60 green beads (spring)
60 yellow beads (summer)
58 red beads (fall)
57 blue beads (winter)
These bead numbers should be reasonably accurate to predict the
solstices and equinoxes in the near term. Over the longer term, the
boundaries between the colors may need adjusting by repainting beads,
but the actual bead positions would remain the same since it tracks
the mean tropical year.
Victor
On Thu, May 21, 2009 at 3:35 AM, Palmen, KEV (Karl)
<karl.palmen@...> wrote:
> Dear Victor and Calendar People
>
>
>
> Very clever! Victor uses the small slower moving peg as the new moon mark on
> the moon wheel!
>
> The pegs are moved once every 19 years once every 18*19=342 years the small
> page move one place in the direction that the moon wheel rotates, so forcing
> the sun wheel to turn an extra tooth (as it would do if it slipped against
> the moon wheel).
>
>
>
> This is better than my suggested revision involving an annual moving of the
> pegs and correction by slipping of the sun wheel one tooth against the moon
> wheel.
>
> However my suggestion can be easily modified to produce a 334-year cycle.
>
>
>
> Karl
>
>
>
> 10(08(26 till noon
>
>
>
> From: East Carolina University Calendar discussion List
> [mailto:CALNDR-L@...] On Behalf Of Victor Engel
> Sent: 20 May 2009 23:35
> To: CALNDR-L@...
> Subject: Revision of Two Gear/Two Peg Lunisolar Device
>
>
>
> Dear Karl, Irv and Calendar People,
>
> OK How about this device and operation, which I think is a bit more
> straightforward.
>
> There is a 235-cog gear with one mark near one of the cogs indicating the
> start of a year.
> There is a 19-cog gear with 19 holes used to contain two pegs.
> The two gears interlock and are adjusted relative to each other by rotating
> the 19-cog gear clockwise.
> The pegs consist of one short peg moved rarely, and a long peg moved
> frequently. The frequently moved one is longer so it can be grasped even
> when the short peg is in place. That was my reason for the different lengths
> of pegs earlier, but I didn't mention it.
> Each time the small gear is rotated, it is rotated until the smaller peg is
> closest to the larger gear. One month is considered to have passed at this
> point. While the small gear is being rotated, the new year mark on the large
> gear should be observed. If it passes the point where the small peg finally
> comes to rest during the rotation, then the large peg is moved one hole
> counterclockwise. If the small peg is occupying that hole already, it is
> moved to the spot previously occupied by the large peg, whereupon the large
> peg takes the spot previously occupied by the small peg.
>
> In this way, the tall peg travels counterclockwise around the gear, and the
> small peg travels clockwise around the same gear.
>
> By rotating the gear until the small peg aligns with the large gear,
> adjustments are automatically made by 1/19 month.
>
> Victor
>
> ________________________________
> Scanned by iCritical.
>
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