David C. Roy's Monarch II

[John T]

Hi Dale,
I think if you look very closely - the reverse rotation of the outer wheel will catch on a pawl and cause enough counter rotation for the "top" pawl to release from its pin.  The spring can now impart rotation to the outer wheel.  When the wheel rotates enough for the pin at the top to catch the pawl it releases the pin on the wheel and let it spin.  The whole thing then works on gravity putting the pawls in a position to catch on the "reversing" rotation and held against the driving pin by friction until that friction is released when the second pin is hit.

John

[ArtF]

Facinating devices arent they... :)

Art

[DHelmick]

Exactly...great description....

I am working on this mechanism a we speak...designed in Cut2D...cut on my 48x96 CNC router

Have cut out and assembled all the parts....using a weight to power it..so far it is working perfectly ..

Dale

[ArtF]

Dale:

  Show us how it all works out.. I love these things..

Art

[danmauch]

Take a look at this video...you can see the 4 Pawls...and how they are balanced....catch, released and centrifugal force?? makes them catch on the long brass rod....

Also shows the constant force spring "motor"...

Very simple... but like everything...its  the fine  details that allow it to work properly..

http://youtu.be/S-f2SQPQ5Ow?list=PL5D1BAFF5DE0B8EB7

Dale

I think this will visually help you. No, I did not create it but another guy did and was selfless with sharing it so its the least I can do to pass it on.
Dan Mauch

[ArtF]

Dan:

  Very nice. Thanks for that post.. migth hvae to turn that into a module...

Art

[DHelmick]

Here is a short video of the cams and
Disc...before the large wheel is added...

Still experimenting with different shape
Cams and tweaking it...

Seems to work fine...

http://youtu.be/ATSht4ba29Y

Dale

[ArtF]

thats DOES look good..!

Art

[DHelmick]

Here is something I threw together...need to add gears to increase run time
Still adjusting the balance ..but it runs perfect..

Power is supplied by a Chrome Vanadium Thumb adjustable weight..(Crescent Wrench)

I am going to get a couple constant force
Spring motors and experiment with those..

http://youtu.be/jTxCsfCMz_s

Side View
http://youtu.be/6rUHdRNfS7Y

[ArtF]

Nice long runtime..

Art

[DHelmick]

I think you may be right about small magnets in the "butterfly" shaped pawls..After watching the close up video over and over  till my eyeballs almost fell out...I see the "free" pawl move quickly towards the center...(brass rods) when it nears the trapped Pawl...no matter what direction it is turning...but when it goes backwards....this action moves it towards the pin..the free pawl then pops out clears one pin and then gets caught on the next..releasing the spring energy.....

https://www.youtube.com/watch?v=ZfBsNsWvvJw

Hmmmmm...I am going to experiment with small rare earth mags and see what happens..

Dale

[ArtF]

Dale:

  Its how my bat does it.. a small rare earth pulls the latch inwards at the rigth point... I get the feeling he doesnt use any though...

Art

[DHelmick]

Then it must be MAGIC!!!

[RG]

I think you may be right about small magnets in the "butterfly" shaped pawls..After watching the close up video over and over  till my eyeballs almost fell out...I see the "free" pawl move quickly towards the center...(brass rods) when it nears the trapped Pawl...no matter what direction it is turning...but when it goes backwards....this action moves it towards the pin..the free pawl then pops out clears one pin and then gets caught on the next..releasing the spring energy.....

Dale

I think so too...I'm going to order a few small rare earth magnets and run some tests.

Roger

[ArtF]

It does work, that Bat in the ticker video runs with small rare earths.. it just always seemed like cheating to me.. I suspect theres a clever little latch or somethign in there... :)

Art