Galileo

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This page is a bit different. I had all the same problems but this time there is no story just the finished model. Galileo's Escapement

interpreted from a design by ZombieCat

http://www.thingiverse.com/thing:31439

from a drawing by Galileo

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20Escapement%2001.JPG?attredirects=0

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20Escapement%2007.JPG?attredirects=0

And this is my result ...

I say "interpreted" ...

because the "instructions" are only in 2D and 3D parts have to be guessed from some pictures.

But I guess the same is true of Galileo's diagram.

There are parts where I know I have deviated from the design but the functionality is still there.

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20Zombie.JPG?attredirects=0

Also, ...

Galileo's diagram looks to have a (ratchet) toothed escape wheel; and the inset detail makes this clear(er).

So, after completing the model, I did a quick modification to see what I could see.

My "teeth" could be improved a bit - I'm not much good when it comes to the "make it look good" stage.

Galileo Escapement v03 teeth.mp4

Analysis

For the the escapement only the escape wheel is necessary.

For a clock-type-thingy you need wheels, power source, etc.

I have followed ZombieCat's plans but, for usage and timing, I can't see how they will work. Galilieo's diagram has wheels with more teeth. I counted (estimated) 84.

This seems to provide a more reasonable pendulum length and period.

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20teeth%2001.JPG

So, (?) we need a pendulum approx. 58 cm (tick-tock 1.5 seconds); and another wheel-pinion (48-6) that will (therefore ?) turn once an hour.

Please, remember the RULES.

####### ( June 2018 ) having been asked a question and re-looked at this I think there is something wrong? It's generally OK, but, ...

- pinion 2 should be called escapement pinion (i.e. on the escapement axis)

- pinion 1 should be called wheel 2 pinion (i.e. on the wheel 2 axis)

- and the other wheel-pinion should be 84-6

- and then the minute hand wheel (48)

- other wheels can reduce the ratio by 12 for the hour hand

as per the table (above)

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20teeth%2002.JPG

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20fix.JPG

Documentation

Here is a PDF document of the escapement:

https://drive.google.com/open?id=0ByO3H4Rve-LfY3NiZ2FEOU9fd2c

Here is a 3D PDF document of the escapement. You may have to download the document and open with Adobe Acrobat Reader to get the 3D viewing:

https://drive.google.com/open?id=0ByO3H4Rve-LfX2hISnVJX2RpTnc

The link works (for me) if downloaded, opened in Acrobat Reader, Trust option, and click on the small icon)

https://sites.google.com/site/lifeinfontenaisescapements/galileo-escapement/Galileo%20Escapement%2009.JPG

Galileo Escapement v03.PDF

Credits

Thingiverse has requested:

"If you print this Thing and display it in public proudly give attribution by printing and displaying this tag."

Voila.

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