Credit for various pieces of this clock go to Gearotic Motion for the spokes and teeth, Clayton Boyer for the time train, Aaron Dodd Crane from the 1800's for the escapement, and Widget Master for making my project take on life.
This converted church has a couple of thousand of clocks and leans towards Canadian manufacturers, like Arthur Pequegnat - one of Canada’s best known
The clock design starts by going to Excel and “playing” with variables to get what you want. In this case Escape at one minute and Great wheel at one hour
Not readable here but these are the gear by gear and pinion by pinion specifications for the gear set. Specs for all the spokes are also given here
The first “look” at the gear works is from the program Gearotic where all the wheels are designed to size and then the placement is worked.
The Clock Works will fit in a plate arrangement about 8” by 10”. Both the running and time wheels are shown here.
I’m going to use this Seth Thomas design as a bit of a model. Mine will be a lot different but the same simple layout.
I decided to place the pendulum off to the right and allow the hour / minute hands to be in the middle.
The clockworks will house easily in a 12 by 20 case. I will likely have to have a pulley in the weight channel to get 24 hours.
The first wheel cut was the 60 pin escapement wheel with a 12 spoke design using a 1.2 mm cutter
The pallets and pallet arm is 3” long (radius of the escape wheel) and is my own design in that it uses a single leg or arm.
The pallets are the most delicate with two opposing ramps with a 1/16” gap between them. With 1/4” between pins there is just enough room for 2 ramps and the gap.
This shows the pin spacing and the pin ramps or pallets engaging the wheel
The finished pin wheel and the finished pallets on a piece of scrap show that the system will work quite nicely.
The next step was to add the #3 wheel and apply some motive force to check the working and it passed the test.
The plates are from Gearotic Motion and are aligned with a tab arrangement. I’ve used 1/2” tabs on this clock and enclosed all 6 sides (optional)
Gearotic Moion will calculate plates to house the gear set. To provide “finger space” I left the supports verticle on the front and horizontal on the back.
Gluing 6 pieces all at once is definetly a challenge and a couple of spare hands would have been nice.
The cutouts were purely arbitrary in order to have some “finger access”
Hopefully there will be lots of ways to get at the parts.
The pivots were all placed by Gearotic Motion to provide a specified backlash and are working perfectly.
The pin wheel side of the mechanism
I’m still trying to decide if this should be the front of the back. For now I’ve put the pendulum and hands on the same side, but its optional.
For the present at least this is the front of the clock with the pendulum to the left of the face, a daisy wheel time train and a maple leaf pendulum bob.
The turning wheel at the upper right is planned to maximize the weight drop and consequently the run time.
The case is made from maple and will be stained when finished
The movement is mounted on a board as high as possible in the case to give the weight as much travel as possible.
The mounting board has been lowered by and inch so that the face isn’t covered by the door frame.
The ink work on the door is finished and features the “Ogo Logo” of Branch #7 - BC Old Time Fiddlers.
The “Ogo Logo” was my wife’s idea.
The inside surefaces of the clock case were painted black just to give a stong contrast.
Just a couple of oblique views
The works firmly in place and ticking. This has proven to be a really willing clock works as it is very easy to adjust and put into beat.
The art work is still on the glass but is nearly impossible to see with the interior of the clock black.
By putting a light background behind the art work it comes so life. I’ll have to figure something the same for the upper window - maybe gold on the artwork.
In trying to get the artwork to “show” I’ve repainted the interior white - better now.
This is the photo that will accompany the clock in the Canadian Clock Museum once it gets shipped and received.