Abstract: A system includes a micromirror arranged to receive and reflect an optical input. The micromirror is adapted to tilt between a first position and a second position. The system also includes an optical sensor array arranged to receive light reflected by the micromirror at a position between the first position and at the second position and a processor in communication with the micromirror and the optical sensor array. The processor is adapted to control the micromirror to tilt between the first position and the second position when the optical input is received, thereby sweeping the reflected light across the optical sensor array to generate a swept light signal at the optical sensor array, and determine a temporal characteristic of the optical input based on the swept light signal.

Abstract: Some embodiments are directed to a system that includes multiple fire sensors and equipment, and mobile devices of the users of the system. These fire sensors and equipment are configured in a network so as to allow communication with a processor. A processor in the system interrogates the status of the fire sensors and fire safety elements on a continuous basis. Upon a change in system status, the processor interprets the change and classifies according to operation state or probability of a fire or other imminent threat. The data, processing and storage provide the means by which occupants and potential occupants can better navigate a building during the occurrence of a fire.

Abstract: A laser detection system and method of two way communication comprising: a Mach Zehnder interferometer, the Mach Zehnder interferometer comprising: an entry beam splitter for splitting incident light into a first arm, having an arm length L1 and a second arm having an arm length L2; a modulation stage for receiving a modulation signal and applying a phase difference to the second arm, the magnitude of the phase difference depending upon the magnitude of the modulation signal; an exit beam splitter for recombining light from the first arm with light from the second arm to create a first output and a second output; a detection stage comprising a first detector at the first output for detecting intensity modulation caused by interference of the recombined light; and a signal processor communicably connected to both the modulation stage and the detection stage.

Abstract: A laser detection system and method of two way communication comprising: a Mach Zehnder interferometer, the Mach Zehnder interferometer comprising: an entry beam splitter for splitting incident light into a first arm, having an arm length L1 and a second arm having an arm length L2; a modulation stage for receiving a modulation signal and applying a phase difference to the second arm, the magnitude of the phase difference depending upon the magnitude of the modulation signal; an exit beam splitter for recombining light from the first arm with light from the second arm to create a first output and a second output; a detection stage comprising a first detector at the first output for detecting intensity modulation caused by interference of the recombined light; and a signal processor communicably connected to both the modulation stage and the detection stage.

Abstract: A mechanical refrigeration and heating unit supplies filtered air that is heated or chilled as needed for one or more welding helmets. A portable or transportable cabinet or housing has an air inlet on which a cartridge air filter is mounted. The air passes through an evaporator coil into an evaporator plenum where an evaporator fan moves the air to an outlet that connects with a heater plenum that contains an electric heater module. An outlet of the heater if fitted with an outlet port to which an air hose may be connected. A compressor, condenser coil, receiver, and condenser fan are located in an equipment compartment in the housing. A control board in the unit allows the user to select heated or chilled air. A clogged-filter alarm provides visual and audio alarm signals when pressure in the evaporator plenum falls below a threshold.

Abstract: A mechanical refrigeration and heating unit supplies filtered air that is heated or chilled as needed for one or more welding helmets. A portable or transportable cabinet or housing has an air inlet on which a cartridge air filter is mounted. The air passes through an evaporator coil into an evaporator plenum where an evaporator fan moves the air to an outlet that connects with a heater plenum that contains an electric heater module. An outlet of the heater if fitted with an outlet port to which an air hose may be connected. A compressor, condenser coil, receiver, and condenser fan are located in an equipment compartment in the housing. A control board in the unit allows the user to select heated or chilled air. A clogged-filter alarm provides visual and audio alarm signals when pressure in the evaporator plenum falls below a threshold.

Abstract: A DC powered refrigeration package supplies refrigerant to an evaporator coil that is incorporated into the driver's seat of a race car. The DC-powered compressor, condenser and condenser fan are contained within an enclosure that can be situated behind the driver's seat. The refrigeration circuit chills the seat to below freezing, favorably to about 20° F. or below.

Abstract: A DC powered refrigeration package supplies refrigerant to an evaporator coil that is incorporated into the driver's seat of a race car. The DC-powered compressor, condenser and condenser fan are contained within an enclosure that can be situated behind the driver's seat. The refrigeration circuit chills the seat to below freezing, favorably to about 20° F. or below.

Abstract: A medical apparatus is provided. The medical apparatus is designed to be a foot covering that is specially designed for diabetic individuals who may have or be susceptible to medical conditions of the feet. The medical apparatus allows an individual to go outdoors without wearing shoes, because the medical apparatus itself serves as a crude shoe covering over a pair of feet. In addition, the medical apparatus itself can serve as a sock covering, which can then be used when a shoe is placed over an individual's feet.