Abstract: A reversible jamb block for a furnace, oven or kiln, having an attachment side adapted to removably attach to the first side of a doorway for the furnace, oven or kiln, and adapted to removably attach to the second side of the doorway, such that one face of the jamb block is directed away from the furnace when the attachment side of the jamb block is attached to the first side of the doorway, and a second face opposite the first face, is directed away from the furnace when the attachment side of the jamb block is attached to the second side of the doorway.

Abstract: The invention is directed towards a front panel assembly for receiving air to be conditioned by a manufactured home furnace. The front panel assembly comprises molded panels allowing for a greater amount of open louver area, improved appearance, and improved sound-deadening qualities. The molded panels can be held together by rails, which can also be used to hold a filter in place behind the molded panels.

Abstract: A rotary furnace includes a drum and a frame supporting the frame for rotation about a nominally horizontal rotational axis. The frame and the drum are supported for pivotal movement about a horizontal pivotal axis. A door supported on the frame normally closes the front end of the drum and is selectively pivotal to an open position to facilitate charging of the drum. The door includes a pouring door which is openable to facilitate discharge of molten material from the drum.

Abstract: A boiler apparatus is provided with a forwardly-opening hinged door. To open the door, the top of the door is moved away from the housing and toward the technician. One or more hinges may be located at the bottom of the door. Since the door does not open sideways, the apparatus requires reduced side-to-side floor space. The door may be used to obtain access to heat transfer surfaces. The door is preferably constructed to minimize the floor space occupied by and required to service the apparatus. The apparatus may include a stand for supporting the boiler at an elevated location for inspection and maintenance. A water tank may be located underneath the boiler.

Abstract: A cable system for raising and lowering a door of an industrial furnace utilizes a pair of vertically extending cables having lower ends connected to the door and upper ends connected to shaft-carried sheaves that are rotated concurrently to cause upper portions of the cables to be wound onto and off of the sheaves to raise and lower the furnace door to open and close a furnace opening defined in a vertical furnace face. The cables wind onto and off of sheave-defined tracks that are configured to cause lower portions of the cables to move the door a small distance horizontally during raising and lowering. This small distance horizontal movement capability may be utilized at the initiation of door raising to move the door away from the furnace face, and at the conclusion of door lowering to close the door against the furnace face to close the furnace opening.

Abstract: A heating appliance having which a viewport through which combustion can be viewed incorporating a portion which is reflectorized to reflect some of the radiant heat of the burning fuel in the fire chamber back into the fire chamber to maintain high temperatures in the fire chamber for efficient combustion while reducing the temperature of the outer surface of the viewport and accordingly the likelihood of injury to persons accidentally touching the viewport and the possible damaging effects of thermal exposure and shock. The viewport is reflectorized in the preferred embodiment by a treatment which enhances the reflectivity of the transparent or translucent portion over that of transparent glass.

Abstract: A tunnel shaped stoker hearth comprises a lower U-shaped portion (42) made conventionally as a double walled steel construction having injection holes (46) for combustion air in the inner wall thereof, and a top portion (48), which is made of a ceramic material, whereby, in operation, the top portion of the tunnel hearth is kept red or white glowing for effective combustion of the fuel and the gases as escaping therefrom.

Abstract: A closure arrangement for an incinerator or cremator in which the door and the opening in the incinerator are complementary wedge-shapes is described. The door can be automatically lowered by a hydraulic actuator to close the opening by a wedging action in the vertical direction. The seal is enhanced by a sealing strip fastened around the periphery of the door which is compressed between the door and the opening when the door is closed. A hinge is connected between the door and the actuator which allows it to move laterally as well as vertically so that it can fit snugly into the opening. The door can also be raised to close the opening. In the case of large heavy doors the hinge can be omitted and the door may be raised or lowered using guides.