Abstract: A door mechanism for supplying solid fuel to a store of a solid fuel burning appliance has a body defining a transfer chamber having an inlet and an outlet. An inner door is movably mounted to the body for closing the outlet thereof, the inner door normally closing off the outlet but being displaceable by solid fuel to an open position, for example against the influence of gravity. An outer door is mounted for closing off the inlet, and again is movable between a closed position and an open position. A displacement member is secured to the outer door. The displacement member is dimensioned so as to displace fuel from the transfer chamber through the outlet, as the outer door is closed.

Abstract: A mechanism for feeding solid material, e.g. wood in a wood-burning furnace, has a pair of rollers. The rollers are rotatably mounted, so as to be generally horizontal and substantially parallel to one another. The rollers are spaced apart to permit the solid material to fall between them. Thus, in a furnace, they are far enough apart to permit logs to fall from a store into a combustion chamber, but are also sufficiently close that, in the absence of roller motion, the material tends to bridge between the rollers. A drive is provided for rotating the rollers.