Abstract: A gas-fired burner of the radiant type includes a boardlike heating element constituted by a porous matrix of refractory fibers, the periphery of one side of the heating element being bonded to and in fluidtight engagement with an open end of a sheet metal box functioning as a gas plenum. A combustible gas mixture is fed into the plenum and forced through the porous heating element for burning at the outer face thereof. The boardlike heating element is retained in position by a strip of perforated metal fixed to the outer surface of the sheet metal box and extending about the edge of the heating element, the strip being bent over to hold the edge of the heating element against the box. A multilayer blanket of thermal insulating material wrapped around the sheet metal box is held in position by bent metal tabs and by the bent strip of perforated metal retaining the heating element. A low cost diffuser assembly ensures optimum gas mixture flow within the plenum.

Abstract: A gas-fired burner of the radiant type includes a boardlike heating element constituted by a porous matrix of refractory fibers, the periphery of one side of the heating element being bonded to and in fluidtight engagement with an open end of a sheet metal box functioning as a gas plenum. A combustible gas mixture is fed into the plenum and forced through the porous heating element for burning at the outer face thereof. The boardlike heating element is retained in position by a strip of perforated metal fixed to the outer surface of the sheet metal box and extending about the edge of the heating element, the strip being bent over to hold the edge of the heating element against the box. A multilayer blanket of thermal insulating material wrapped around the sheet metal box is held in position by bent metal tabs and by the bent strip of perforated metal retaining the heating element. A low cost diffuser assembly ensures optimum gas mixture flow within the plenum.

Abstract: A single-wall sheet metal box functioning as a gas plenum has an open face closed by a porous matrix of refractory fibers bonded together to form a rigid, boardlike heating element. A combustible gas mixture is fed into the box, forced through the porous heating element, and burned at the outer face thereof to provide a continuous infrared radiant surface. The outer surface of the sheet metal box is completely covered by a blanket of flexible insulation material having an edge portion stuffed between the periphery of the heating element and an adjacent flangelike edge of the box. A first type of snap-on clip maintains the heating element in position, while a second type of snap-on clip retains the stuffed edge of the insulation blanket between the heating element periphery and the adjacent edge of the box.

Abstract: A self-ventilating infra-red ray heater having cooperating housing, endplate and internal reflector structure which results in standardized construction of parts which may be included in single or multiple element heaters. The invention seeks maximum utilization of inexpensive sheet metal components to obtain heaters of low manufacturing cost especially suitable for use in portable heaters which may be oriented to direct heat in any direction. In the aforenamed structure, an internal reflector is received in an arcade-type housing to form a space or jacket enclosing except for openings in opposite ends of the crown of the housing for communication of the space with the atmosphere. Preferably the end plates are formed with flanges which overhang the openings with clearance to protect against entry of unwanted materials into the space.

Abstract: A radiant burner having a porous, refractory board matrix through which a combustion mixture is blown and at the outside surface of which it burns, characterized by retaining means to hold the matrix on a shelf without a heat absorbing retaining rim for the matrix and air cooling of the burner frame through such retaining means.

Abstract: A heating device comprising, as portions, a heater and a dolly of which a tilt frame of the dolly is attached to, or fixed integrally with, the housing of the heater with such adjustability with respect to a base of the dolly to afford universality of position of the heater when taking into account the orientability of the device as a whole. The scope of positioning of the device is greatly amplified by use of a handle strut fixed to the tilt frame.