Step 1

Well I've noticed a mistake and I've not started!  The 60 degree template is smaller than the minute wheel - so I've redone it on 6 A4 sheets.   I just can not stop playing - so here is something completely different. If the final clock is worth keeping, then I might as well make it as a family heirloom!  The first C. Broadhurst was born in 1859 and the tradition, down my father's line has been kept up ever since, including my son and grandson. So how about hanging the clock around a capital 'C'?  It is only a 20" circle. or maybe reversed? I've included the winding weight although I think that is not a good idea - so another rethink is in order. This throws out the water on all my early thoughts, but it is fun just playing with ideas. We have lift off! The whole clock winding mechanism has been bugging me for sometime.  I do not like the idea of a key that would need turning, probably over 48 half turns per day unless I have extra gears (which would require less turns but more effort). I had initially thought to have a second Leverage pulley to act as the winder - but I have made a silly mistake in that it would require as much downwards force as the main weight, rather than the 3lbs driving force at the minute arbor. But I liked the idea of just pulling on a rope, rather than turning a key. Enter a sort of Windlass.  It works by the friction on a shaft.  You pull on one side, keeping a little tension on the other one.  The more the tension, the greater the friction.  Opposite is my experiment, which easily lifted 4lbs using a slippery nylon rope on a varnished barrel.  The experiment used a 3cm diameter barrel. If I went to 4 turns it was even easier as there would be even more friction. As a bonus, if there is no weight on the rope, then the extra friction introduced will be almost negligible. This is so simple I shall not bother to draw up a template, just increase the diameter of the second drum.  The drum will be 3cm deep (to be on the safe side) and the drum ends 6cm diameter instead of the proposed 4 & 3cms ones. The Glue problem.  The answer was staring me in the face!  When I started, I used paper templates which stuck very well.  So it occurred to me, why not make a sandwich - wood <> paper <> film.  I've tried gluing the paper to film and it was quite strong.  I just need to prove this will work, by cutting and sanding a spare piece of wood, and Bob's your uncle.

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