Name of vehicle for passager to walk up to aircraft?

Jetways (possibly a trade name) or movable gangways, these futuristic (when they were first introduced, glass enclosed and weatherproof)enclosed boarding gates have been around since about l963, they were first introduced, it is claimed at la Guardia Airport. They, are power-operated and something like exstensible fire-ladders or telescopic walkways. Other than that I have no info. They are, it should be considered, technically a form of movable bridge-the retractile type, rare in full-size bridges but common with ship gangways, fire ladders (on fire trucks, hook and ladder) and similar specialized applicationsl. the three major classes of Movable Bridge are of course, Swing, (the oldest), Bascule (Tiltin" Milton) and vertical Lift.