Patent ID: 7547997

Claim:
An aircraft electrical servicing adapter for use with a power supply system and an aircraft, the power supply system having a controller, a 28 VDC power source, a 270 VDC power source, and a 115V/400 Hz AC power source, a 115V/400 Hz cablehead plug, and a first power recognition circuit segment, and the aircraft equipped to receive power from a 270 VDC power source and a 28 VDC power source, the aircraft having a 270 VDC receptacle, the aircraft electrical servicing adapter comprising: an adapter body; a power end attached to the adapter body; an aircraft end attached to the adapter body; and a second power recognition circuit segment having a diode, the second power recognition circuit segment for completing a single power recognition circuit with the first power recognition circuit segment; a socket arrangement having six socket openings located in the aircraft end of the adaptor for receiving 270 VDC receptacle pins of an aircraft; a receptacle arrangement having six pins, said receptacle arrangement located on the power end of the adaptor for mating with the 115V/400 Hz AC cablehead plug of the power supply arrangement, wherein the receptacle arrangement comprises: a two part pin having a first contact portion and a second contact portion, said first and second contact portions forming at least a portion of the first power recognition circuit segment with the diode connected across the contacts, wherein when said receptacle arrangement is inserted into the 115V/400 Hz AC cablehead plug the single power recognition circuit is completed and communicates to the controller that the adapter is attached to the cablehead resulting in the controller supplying power from the 28 VDC power source and the 270 VDC power source to the cablehead.