Abstract: An infrared sensor including a plurality of infrared cameras is described. Each infrared camera includes an infrared detector and imaging optics. The imaging optics are arranged to image infrared light onto the infrared detector, the imaging optics having a field of view with a center optical axis, and field of view boundary lines bounding the field of view on sides of the field of view. The infrared cameras are arranged such that the center optical axes of the field of views intersect each other, and the fields of view overlap each other.

Abstract: According to embodiments of the present invention, a pellet stove includes a firepot assembly with a bottom plate slideable along rails to move between a closed position during combustion in the firepot and an open position during ash removal. According to other embodiments, a firebox or combustion enclosure includes a plurality of airfoils formed on the inner and outer surfaces of the enclosure to facilitate heat exchange between exhaust gases flowing across the inner surface of the enclosure and air blown across the outer surface of the enclosure. According to some embodiments, the airfoils and enclosure are of integral unibody construction. According to yet other embodiments, a user sets parameters via a wall control unit, and a stove control unit receives the parameters and automatically controls fuel feed rate, ignition, convection blower, combustion blower, and/or firepot cleaning based on the one or more parameters.

Abstract: An air bypass system for use with a heating appliance that includes an outer enclosure and a combustion chamber enclosure positioned within the outer enclosure. The bypass system includes a first opening providing an air passage between a source of air from a remote location and an air space defined between the outer enclosure and the combustion chamber enclosure. The bypass system also includes a second opening providing an air passage between a source of room air and the air space, and an actuating member configured for movement between a first position substantially covering the first opening wherein the second opening is open for air flow, and a second position substantially covering the second opening wherein the first opening is open for air flow.

Abstract: A wood burning stove is provided. The combustion chamber in which the fire occurs has a baffle plate that is moveable to direct air flow through one of two different pathways from the combustion chamber to the chimney. When in a first position, the baffle plate forces the air and smoke to move through a first pathway; when in a second position, a by-pass pathway is opened, allowing air and smoke to move through a second pathway. The stove can have a door in the front wall, or the top wall, or both walls, to provide access to the combustion chamber.

Abstract: A method for evaluating the quality of the cement surrounding a borehole casing is provided. The method generally comprises obtaining signals which were recorded by a CET tool known in the art, and processing the signals by: dividing each signal into particularly defined time windows; determining absolute magnitudes for each signal which are functions of the energy of the signal in the respective windows; determining normalized magnitudes for each signal from the absolute magnitudes and normalization parameters; and evaluating the quality of cementation as a function of the fact that the normalized magnitudes for each signal obey a predetermined law, and as a function of the relationship between each normalized magnitude and a pair of threshold values respectively associated therewith.According to another aspect of the invention, information obtained from a CBL tool known in the art is compared to the information gained from the CET tool.