Abstract: A telescopic boarding bridge mounted at ground level for bridging the space between a small aircraft and a terminal gate doorway. The bridge includes a terminal bridge section supported in a fixed position adjacent the terminal gate doorway and at least one moveable bridge section adapted to slidably receive a front end of the terminal bridge section. The moveable bridge section has idler wheels for allowing movement thereof on the ground. A drive mechanism is operational to selectively push and pull on each side of the moveable bridge section to linearly displace the same relative to the terminal bridge section. The telescopic boarding bridge further includes a flexible canopy enclosure which is displaceable between a retracted position for providing wing tip clearance and an extended position for covering the doorway and the sides of the stairs of a small aircraft.

Abstract: A heating and cooling apparatus having a first gas conduit, a second gas conduit and at least one thermoelectric module. In a first embodiment, structure is provided to introduce moisture into the second gas conduit, upstream of that conduit's association with the thermoelectric module. The introduction of the moisture into the gas within the second gas conduit functions to decrease the temperature between the temperature of the gas in the first conduit and the temperature of the gas in the second conduit, thereby optimizing the operation of the thermoelectric module. In a second embodiment a plurality of thermoelectric modules are arranged in an array and positioned between the gas conduits and associated therewith. The power supplied to each of the thermoelectric modules is adjusted to correspond to an optimum power input calculated for each thermoelectric module respectively.

Abstract: A heating and cooling apparatus having a first gas conduit, a second gas conduit and at least one thermoelectric module. In a first embodiment, structure is provided to introduce moisture into the second gas conduit, upstream of that conduit's association with the thermoelectric module. The introduction of the moisture into the gas within the second gas conduit functions to decrease the temperature between the temperature of the gas in the first conduit and the temperature of the gas in the second conduit, thereby optimizing the operation of the thermoelectric module. In a second embodiment a plurality of thermoelectric modules are arranged in an array and positioned between the gas conduits and associated therewith. The power supplied to each of the thermoelectric modules is adjusted to correspond to an optimum power input calculated for each thermoelectric module respectively.