Phun: Escapement

Simplified 'Lever Escapement' built in Phun, illustrating the workings of a mechanical watch. Since I can't put a spiral spring at the wheel balance, I've put a hormal spring in, but you get the idea.

Related:
3D looks on the accurate model
http://uk.youtube.com/watch?v=aPyIcxmecYs

Clock version
http://uk.youtube.com/watch?v=g5c5RK4WFV8


Wiki on Lever Escapement
http://en.wikipedia.org/wiki/Lever_escapement

Phun
http://www.phun.at/

Category:

Education

Tags:

• Watch
• Escapement
• LeverEscapement
• Balance
• Wheel
• BalanceWheel
• Time

[taofledermaus]

Although the springs aren't correct, the action is. The blue gear, called the escape wheel is the last wheel on a watch's geartrain and is actually "flicking" the balance wheel making it oscillate which in turn moves the pallet (t shaped piece) and allows the escape wheel to turn one click. They cycle is repeated around 18,000 times an hour.

[engp0963]

The software 'Phun' doesn't have the spiral spring that watch has. So, I have to substitute the spring with the only spring it has. The 'flickering' thing (the Y shaped fork at the central of the balance wheel - the big wheel) is wrong too, it should be flicking the thing at the back, but 'Phun' doesn't allow much of a 3D workings.

[tahboobi]

Are you Mechanical Engineering students, if yes please tell me what course is this.

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[AaronLow1]

2nd uploader comment, thats called a hairspring

[AaronLow1]

IVE SEEN ONE OF THESE! its a hair spring timer, i took one apart when i was 8 lol

[RollaArtis]

Don't worry, your balance spring idea was used by Robert Hooke around 1670. Apparently it didn't work very well.

[Shtwc1]

This is neat!

[wowmastervenix]

hehe i was trying to make some of mine no energy powered stuff its hard to make one and yh thats how waches work lol nice vid ^^

[taofledermaus]

You did a good job. I looked all over for an animation on how the escapement works since it's so difficult to see on an actual watch.

[engp0963]

The energy comes from the blue gear (i.e. the small directional gear at the bottom - the escape wheel). In an old clock, this escape wheel is used to drive the second hand (i.e. 60 seconds for 1 complete rev). Watches' one would be geared (1 complete rev = X seconds) because it is much faster.

In the Phun movie shown here, I've 'cheated a bit by linking it with a 'motor' at the escape wheel, giving it the energy. I have tried using a chain to pull on a heavy object, but it doesn't work well.