Simple is often the best, and the patent filed by Frederick E Blodgett in 1911 is the spiritual ancestor to the Blackland Sabre you can buy today.
Described – as most patents – as a new and useful improvement on the state of the art, it was described as a:
…combination of a flat, single-edged, apertured blade, a fiat holder plate, a flat guard plate, means for positioning said blade with respect to said plates, a threaded locking handle for locking the three, and a guard or comb on said guard plate; said positioning means comprising a pair of lugs engaging the blade back edge and a threaded lug engaging the blade aperture, said threaded lug adapted to be engaged by said locking handle.US patent 1,017,199
As shown by the Blackland Sabre, this method of construction works – with a couple of minor and obvious modifications – just as well today as it did almost one hundred and ten years ago.
Full patent available on Google Patents, as usual.