My grandfather raised bees and made his own boxes. Some of his had drawer pulls for handles, which was explained by the fact that he was a finish carpenter. Others had something similar to what show. I asked my dad as my grandfather has been dead for 10 plus years and i remembered bits and pieces he said that he used the following:
He had stop blocks on the tablesaw and a spacer against the fence that was the width of his dado blade. He would place the side center on the table and crank the blade up doing a plunge cut into the wood. The then would remove the dado blade and the spacer against the fence which would position the board over to where the curved cut was.
He then place several smaller sawblades each smaller in size separated by a washer starting at a 9" and going down to some the size of a biscuit cutter. Then he did a second plunge cut, this is what my dad says.
I don't think he did the several blades as i don't think he changed blades, i tend to think that he then tilted the dado saw blade and did at least to more cuts moving the board and doing two more plunge cuts the last shallower then the first.
I hope this helps, I did see something on a bee keeping forum that validated either method. The beekeepers seemed to be not as friendly as the folks here though.
