Patent ID: 7956711

Claim:
An apparatus comprising: an extension handle having an extension handle connector, the extension handle connector including a first field emission structure; and a tool attachment having a tool attachment connector, the tool attachment connector including a second field emission structure; the tool attachment connector adapted to be mated to the extension handle connector with the second field emission structure in proximity to the first field emission structure such that the first and second field emission structures have a predetermined alignment with respect to one another; each of the first and second field emission structures including multiple field emission sources having positions and polarities relating to a predefined spatial force function that corresponds to the predetermined alignment of the first and second field emission structures within a field domain, said spatial force function being in accordance with a code, said code corresponding to a code modulo of said first plurality of field emission sources and a complementary code modulo of said second plurality of field emission sources, said code defining a peak spatial force corresponding to substantial alignment of said code modulo of said first plurality of field emission sources with said complementary code modulo of said second plurality of field emission sources, said code also defining a plurality of off peak spatial forces corresponding to a plurality of different misalignments of said code modulo of said first plurality of field emission sources and said complementary code modulo of said second plurality of field emission sources, said plurality of off peak spatial forces having a largest off peak spatial force, said largest off peak spatial force being less than half of said peak spatial force.