I received a reprint of a clock making book written in 1905 for Christmas! (thanks to my lovely wife Kelly) It described some alternately geared gear-trains. I have used that info here. This clock runs at 90 BPM and has a 22inch pendulum. There are many other exotic gear trains and BPM's, but with this, the 30 tooth escapement wheel will always turn 1and1/2 times every minute and make it a lot easier to set the pendulum period with the minute alternating between the top and bottom of the wheels turn. (I was originally going to do 88 BPM and that would have been a real pain)
Here's some preliminary designs drawings...
This one is looking at gear sizes and where to put the escapement (the green lines) I ended up opting with it upside down like on the left most sketch.
This one is looking at skeleton chassis parts for the guts and you can also see on the left, the 2 vertical skinny rectangles...they are the weights(1 on each side for balance)!
Starting to go together...
Here I have realised that a large gear driving the escapement is not going to work, as it will hit other axles. So I then have made it into 2 smaller ones to get the same ratio...Although the escapement will now run anti clockwise.
This picture is getting a lot closer...
These 2 are with no chassis...
Other side...
Will keep you updated. Hope you like it!
cheers
rosco
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