Berlin wrote: i believe there is a serious market out there for a simple and effective bitumionus specifiic stoker.
YES YES YES there is. Bituminous burns best in a stoker where you can control the amount of fresh coal entering the fire as well as the air flow and combustion temps. It either needs to be a underfed stoker like the classic Combustioneer stove, or a traveling chain grate stoker like the Babcock & Wilcox industrial boilers of the early part of the 1900's. However, an inclined, reciprocating grate, similar to the anthracite stokers, but made of multiple sections that alternately sit in a stairstep fashion but then can reciprocate to an inclined position could work. Might be noisy in the home setting, though. Then, a source of heated secondary air and/or a firebrick ignition arch over the new coal coming in from the stoker would be needed (not needed for the underfed style).
I'd love to design up and build a bituminous stoker. I can get bituminous for 1/3 the cost of anthracite. It's nasty, Illinois bituminous, but burned properly, it's pretty good.