Russell,

The answer is =93noria=94. Google is your best friend.
Basically a bicycle chain and buckets, two cogs and small motor with reduce=
r.

Jean-Paul
AC9GH



On Dec 4, 2013, at 9:28 AM, RussellMc <apptechnz@gmail.com> wrote:

> Question: My mission, should I accept it, is to design & build a marble
> lift by lunchtime.
> Comments and ideas welcome.
> See below.
> _________
>=20
> As part of a (stunningly impressive) Christmas related display I have bee=
n
> given the task of making a "marble lift" to take plastic marbles from the
> exit of a ball fall system and return them to the top.
> I was given this task "if I wanted it" at about 1am.
> I'ts 3am Thursday .
> I am about to go to sleep.
> This needs to be working by midday Thursday OR at least by that stage
> certain to work.
> Display opens friday.
> If I pass the magic set builder man will probably come up with something
> that works in no time flat.
> Maybe not.
>=20
> Marbles, plastic, lighter and smaller than std glass marbles. Can measure
> but should not be needed.
> Vertical lift ~=3D 2 metres.
>=20
> _______________
>=20
> Have windscreen wiper motor with reciprocating action and also with rotar=
y
> at 45 and 60 rpm.
>=20
> Can have air from 12v COMPRESSOR OR MAINS COMPRESSOR.
> cAN DO AIR SOLENOIDS BUT TIME LIMITED FOR PLAYING.
>=20
> Can do motors, solenoids, maybe flickers, blowers, lifts ... ?
>=20
> ______________
>=20
> Balls may ascend in batches or in 1's. Rate of ball flow said not to be
> very critical but I suspect having N balls in play at once is desirable s=
o
> ascent flow rate ~ >=3D descent probably.
>=20
> Space limited if possible.  ie a wheel or sloped conveyer not desirable.
>=20
> Extra points if ascent is visible and impressive in its own right.
>=20
>=20
> ___________
>=20
> Note" Archimedes screw does not work as most people think it does - it mu=
st
> be inclined and there are always "buckets" within the screw that hold flu=
id
> even when stopped.
> So a vertical screw is not suited to archimedes screw use. Not really
> enough room here for inclined screw. Probably. COULD angle across front o=
f
> multi shelf ball fall on outside inside clear tube.
>=20
> - Solenoid flicker - use more energy than needed and a deflector plate at
> top.
>=20
> - Motor turns and winds up then releases a spring lever to flick ball.
>=20
> - Air blow - batch or single.
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> - Vacuum
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> - Angled bristles against a shark tooth plate (sawtooth wave shape -
> bristles move up and down and balls catch in sawtooth to give mainly
> upwards flow.
> Some version of this may work well and be "not to hard".
>=20
> - Buckets on endless loop.
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> - Bucket with direction change.
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> - Most certain:
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> Length of wood (say) is reciprocated vertically.
> There are 3 possible columns that balls may be in.
> Channels in moving wood or in base plate can move balls between columns -
> slight down slope.
>=20
> Inject ball at 1.
> Column has 1->2 channel. Ball is in 2.
> Ball thus cannot roll out again into 1 entry hole.
> Move column vertical to 1st channel in base plate =3D 2->3.
> Ball leaves column and enters base channel and rolls to 3.
> Column descends and channel in column descends down to ball.
> Channel is 3->1 . Ball enters column and rolls to 1.
> Lift column - exist into 1->2  in base plate
> ...
>=20
> Stroke >=3D vertical spacing of holes.
> Determinate action.
>=20
> 3:27am. Sleep calls.
>=20
>=20
> Russell
> --=20
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