Abstract: A system for converting potential energy into heat including a tower configured to contain a fluid and to permit the formation of a substantially nitrogen-free combustion chamber defined by the tower and the surface of the fluid in the tower and at a pressure less than ambient, a first tower outlet in fluid communication with a first fuel valve configured to regulate a flow of the fluid out of the tower, an oxygen source in fluid communication with an oxygen valve in fluid communication with an oxygen inlet in fluid communication with the tower, a source of combustible fuel including hydrogen in fluid communication with a fuel valve in fluid communication with a fuel inlet in fluid communication with the tower, and an ignition source positioned so that it resides within the combustion chamber and is configured to initiate a reaction between oxygen and fuel.

Abstract: This disclosure is directed to a carrier, both wheeled and wheelless for transporting relatively large sheets of relatively thin material such as wall panelling, wallboard, composite board, sheetrock or the like, the carrier including a generally inverted U-shaped handle, having downwardly diverging legs whose ends are connected to a generally L-shaped elongated supporting bar upon which lower edges of the sheet material rests, the latter being the basic carrier which may further include an abutment plate or a biting plate carried at one end of the elongated supporting bar and being movable between a position in which it either abuttingly contacts upright edges of the sheet material to prevent the same from sliding edgewise from the elongated supporting bar or digs into lower edges of the sheet material to similarly prevent the latter from sliding off the elongated supporting bar, and at least two wheels supported by the elongated supporting bar, one of the wheels being disposed with its axis in fixed normal