Another learning experience. I really appreciate each meeting. Thanks for making these videos. I did purchase your book and even though I have a bit of clock making experience, it was well worth the purchase price even being shipped to California. Wish I could visit York again for the festival!
Yup. It is worth experimenting with a strip of brass. Work harden it to make it springy, anneal and see how different it is. Repeat! Thanks for the kind words.
With a 78 tooth wheel and 13 leaf pinion, would the same teeth in the train be meshing continually? Does the use of 72/12 offset/equalise the cumulative wear on all the teeth? Hmmm… not at all confident about getting a pass in the #homework but looking forward to finding out next week!
@@openclockclubarchive325 Yes, I’ve come across old bikes with a hunting tooth set up and was trying to apply the same logic. Not sure if it would be excessive in clocks that are under far less strain but might compensate for burrs or other eccentricities?? Not sure... still thinking! :D
1:04:32 Re: Homework of why not 78 teeth and 13 pinions instead of 72 teeth and 12 pinions: Does it have something to do with the width of the teeth? ...that if you keep the same tooth/pinion profile and go to 78 teeth and 13 pinions, both the 78 tooth gear and the 13 tooth gear would need to be larger than their 78 and 13 tooth counterparts, which would mean a larger distance between the two wheels, and perhaps a larger clock movement. ...or does it have to do with the forces on the teeth? That the same torque on a larger driving gear would produce less torque on the driven gear? The whole topic of gear ratio choices in clock design is a total mystery to me - a fun problem.
Hi Bradford. You make some interesting points there. We seem to have opened a subject that is of interesting to quite a few folk so will expand in due course. Certainly, wheels of the same size with more teeth would have finer teeth. On the torque issue, remember, as long as the ratio of sizes remains the same, what you give a away or gain on the driving element, you get back or loose on the driven element. We will flesh this out a bit more in forthcoming weeks. It is a really great idea for everyone to at least design their own clock. Function, duration, frequency of the oscillator. M
Another learning experience. I really appreciate each meeting. Thanks for making these videos. I did purchase your book and even though I have a bit of clock making experience, it was well worth the purchase price even being shipped to California. Wish I could visit York again for the festival!
Thank you for the kind comments! Maybe we can have a works visit to California!!! :=)
41:06 I had no idea that you could anneal brass. Thank you for these fascinating and useful videos.
Yup. It is worth experimenting with a strip of brass. Work harden it to make it springy, anneal and see how different it is. Repeat! Thanks for the kind words.
With a 78 tooth wheel and 13 leaf pinion, would the same teeth in the train be meshing continually? Does the use of 72/12 offset/equalise the cumulative wear on all the teeth? Hmmm… not at all confident about getting a pass in the #homework but looking forward to finding out next week!
That is a really good point. I think it is called hunting gears where the gears do not mesh in the same place as they rotate to even-out wear?
@@openclockclubarchive325 Yes, I’ve come across old bikes with a hunting tooth set up and was trying to apply the same logic. Not sure if it would be excessive in clocks that are under far less strain but might compensate for burrs or other eccentricities?? Not sure... still thinking! :D
1:04:32 Re: Homework of why not 78 teeth and 13 pinions instead of 72 teeth and 12 pinions: Does it have something to do with the width of the teeth? ...that if you keep the same tooth/pinion profile and go to 78 teeth and 13 pinions, both the 78 tooth gear and the 13 tooth gear would need to be larger than their 78 and 13 tooth counterparts, which would mean a larger distance between the two wheels, and perhaps a larger clock movement. ...or does it have to do with the forces on the teeth? That the same torque on a larger driving gear would produce less torque on the driven gear? The whole topic of gear ratio choices in clock design is a total mystery to me - a fun problem.
Hi Bradford. You make some interesting points there. We seem to have opened a subject that is of interesting to quite a few folk so will expand in due course. Certainly, wheels of the same size with more teeth would have finer teeth. On the torque issue, remember, as long as the ratio of sizes remains the same, what you give a away or gain on the driving element, you get back or loose on the driven element. We will flesh this out a bit more in forthcoming weeks. It is a really great idea for everyone to at least design their own clock. Function, duration, frequency of the oscillator. M