I must apologise when I first discussed making governors I very briefly mentioned making long links out of two pieces without explaining the technique for making them, what I am going to describe is making the governor to regulator link for my Double Tandem Compound engine:
This is my drawing for this link:
We will start on the fork, for this I took a piece of 3.2mm scrap and cut from it a piece 8mm wide and 16mm long.
The first cut is to make the slot for the main arm, this was done using a slitting saw:
The width of the cut was checked with the shank of a drill. Then off to the other mill to have two holes drilled:
You can see that the hole we want is very close to the slot that was cut, the other is to give us something to drop this milling cutter into:
So using a slot drill the two holes are joined together. Now we use filing buttons to shape the back of the fork, we don?t want to touch the other end because we need the waste material to hold it together:
This is what she looks like once she has had a little fettling with some files:
Whilst she is in the vice I filed the top and bottom tapers on either side and the first half of the end rounding, then as much of the second half before I had to finally part it from the waste. So one fork end that fits the material I am going to use for the main arm:
The main arm is first drilled for the pivot and end attachment. Then it is shaped up using filing buttons inserted in these two holes:
After a bit of character building this is the two parts:
We are now going to silver solder the fork to the arm. This is done by making sure some damp flux fills the slot in the fork end, adding flux to the end of the arm and balancing a small piece of silver solder above the joint:
Apply some heat:
And the joint is made. It is then back to filing to join the two profiles and some polishing:
The link is put on to the governor, with a washer and a home made R clip:
I would have normally used a single ring from a spring but I had already drilled the governor pivot for an R clip.
You can see what she looks like on my Double Tandem Compound thread.
Jo