Abstract: A mobile video-audio switching system mounted in a motor vehicle powered by the vehicle's 12V DC battery. A mobile video-audio switch(MVAS) device is mounted in the motor vehicle and it has four different video-audio input devices electrically connected thereto and four liquid crystal display(LCD) screens are also mounted in the motor vehicle. Four separate wireless remote control transmitters send individual signals to the MVAS device directing that signals from any of the different video-audio input devices be sent to any of the individual LCD screens. Individuals viewing the respective LCD screens can receive an audio input through a headset that they may wear or they may receive the audio signals through the radio and speaker system already installed in the motor vehicle.

Abstract: A utility ramp having an overlapping hinge feature. The hinge feature provides a strong utility ramp that permits compact storage through nesting of the ramp sections.

Abstract: A microprocessor-based perimeter thermal energy control system regulates heating and cooling in the perimeter area of a building in accordance with instantaneous and integrated heat flow measurements and instantaneous temperature deviation measurements. Control of heat pumps and air conditioning units is provided as is automatic switching between heating and cooling. The inherent thermal parameters of the space are inductively determined and used by the system to continually self-adapt to the heat flow properties of the space. The gain of the heat flow based control system is varied automatically as a function of the deviation between the actual space temperature and the desired set point temperature. Morning recovery is initiated and regulated in response to instantaneous and integrated heat flow measurements and inductively determined thermal space parameters and produces a near linear stepwise change in the temperature of the space from night setback to occupancy temperature.