Patent ID: 7510169
Filing Date: 2009-03-31
Classification: B64F,H02G

Abstract:
1. A hoist system for handling a 400 Hz cable used for aircraft electrical servicing, said system being adapted to be attached to a passenger boarding bridge enclosure portion near an aircraft to be electrically serviced, the system comprising: a plurality of wire rope guide rollers; AC drive means for providing electrical power to said hoist system, said AC drive means being in alternating current electrical communication with a control pendant and said wire rope guide rollers, said AC drive means further being in direct current communication with a bridge horizontal control relay, which is in electrical communication with a horizontal bridge lock-out contact member, a wire rope attached on one end to a take-up spool; a Fob located near a holder end for said cable; an insulator around said wire rope of predetermined length located on an upper side of said FOB; grounding electrical configuration means for wire rope position sensing including a lower limit contact bar extending above a plane between said wire rope guide rollers and said take-up spool, said lower limit contact bar serving as means for preventing said wire rope from rewinding in a reverse manner on said take-up spool; and said horizontal bridge lock-out contact member extending above a plane between said wire rope guide rollers and said take-up spool wherein when said horizontal bridge lock-out contact member is in contact with said insulator, horizontal bridge movement is allowed and when said horizontal bridge lock-out contact member is in contact with said wire rope, horizontal bridge movement is inhibited, wherein said wire rope is electrically configured to be used as an electrical conductor for control voltage through a grounding of said take-up spool to which said wire rope is attached; wherein said wire rope guide rollers are electrically connected so as to serve as means for inhibiting overdriving an upper and a lower wire rope limit and for locking out horizontal bridge movement, wherein conflicting commands are not processed and wherein the AC drive requires a circuit to be completed in order for said AC drive to process a single command.