A Mini Tower Clock

[crueby]

I learned about  treenails, or trunnels watching the Tally Ho videos on YouTube.
Really enjoying the work on the clock project BTW.

Dave

Thanks Dave!  I think I saw those videos a while back.

[crueby]

Going to be a bunch to show tomorrow on the tower clock, stay tuned. In the meantime, guess who's movies the shop elves were watching?

You got it! Harold Lloyd!

<a href="https://www.youtube.com/watch?v=J-TAWw9pAr4" target="_blank">http://www.youtube.com/watch?v=J-TAWw9pAr4</a>

[Roger B]

The tower is splendid     

I was interested in seeing you using your metal mill to cut and shape the wood. It works well     

[crueby]

The tower is splendid 

I was interested in seeing you using your metal mill to cut and shape the wood. It works well 

Yes, works great, basically a  router with fine control.

[crueby]

Okay, couple more parts for the striking clock, then finishing up the tower clock. The sprockets for the striking clock was pretty simple, a disc with narrowed/tapered rim was notched with a small end mill to fit the ladder chain. I had 3D printed a test piece to check the size/spacing first.

Test fit with the chain, all flows on/off nicely.

Here are the shaft and collars for the chain/gear drive. The collars and gear are keyed to the shaft, the sprocket spins free aside from the ratchet.

Here is how the parts stack up:

Made a new pair of pawls for the ratchets, I was not that fond of the ones on the original sprockets, these have better geometry

Still need to make the springs for the pawls.

And, the tower clock is all done and assembled!     Finished up the base yesterday and got the mounting holes all drilled to hold the clock and the tower, and then could measure/cut the final drive shaft up to the tower. The hands on both dials were aligned then tightened down the final screw in the universal joint to lock them in sync.

And a little movie to show it running:
<a href="https://www.youtube.com/watch?v=3jo6Cf6CEs8" target="_blank">http://www.youtube.com/watch?v=3jo6Cf6CEs8</a>

[cnr6400]

  The tower clock looks great Chris! I hope the shop elf eviction from the tower was not too much work. Those tiny beer fridges and lazy boy recliners are heavier than they look! 

Great job too on the striking clock sprockets. Nice touch with the copper plating on the new chain, both for appearance and keeping rust at bay.   

[Kim]

The tower clock is beautiful, Chris! 

Great video too.

You're about to complete two clocks in 1/100 the time it will take me to complete one!   
Kim

[crueby]

Thanks guys! Been a fun project, and it got me to finally get the striking clock fixed too.

Jeff, the copper plating on the chain is interesting, never seen that before, it does give it a nice look. Just a couple more small bits and I can get back to engines again!

[Sanjay F]

I think you and your clock may have caused a time distortion; you started this build on Oct 23rd, surely it's not possible to have completed this by Dec 4th?? 

Fabulous, really amazing, I look in awe at what can be achieved in actual or distorted time!

[crueby]

I think you and your clock may have caused a time distortion; you started this build on Oct 23rd, surely it's not possible to have completed this by Dec 4th?? 

Fabulous, really amazing, I look in awe at what can be achieved in actual or distorted time!

Thanks Sanjay! 
Thats the fun thing about building clocks, you get them running just right and time flies!   

[crueby]

Got the click springs made from bits of tool steel flat bar, drilled the ends for pairs of screws to hold them in place and milled the rest down thinner to be flexible. Then bent them to shape with pliers, no heat needed. Here is one clamped in place to test and the other on the table:

The test one is working well, so I can mark out the positions for the holes through the sprocket. With them done, I should be able to get the clock reassembled, cleaned, and adjusted. I'll likely have to drill out the holes in the shelf the clock sits on up on the wall for the new chain, since it is wider than the original chain. The striking mechanism could use a little adjustment, and the 'fan' on the final shaft for regulating the speed of the striking is not large enough, I want to see if I can increase the size of the blades, or maybe add a second pair of blades. Sometimes it would get going too fast on the longer sequences (9 o'clock and up) and it would miss the stop slot, and go an extra cycle. Either that, or maybe increase the strength on the return spring that brings the stop arm back down to make it react faster. Or both. All thats a good thing to start on tomorrow!

[Admiral_dk]

Wonderful result 

You must admit that you're adjusting Time with this build 

Per       

[crueby]

Wonderful result 

You must admit that you're adjusting Time with this build 

Per       

I got scared that the pendulum speed was way off when the pterodactyl  flew past the window...   

[John MacArthur]

Great looking mini-tower clock Chris!  Hats off..
Johnny

[Krypto]

The mini-tower clock is awesome!

I'm not sure if you have already said this, but how long does it run on a wind?