公开(公告)号：US3585637A

公开(公告)日：1971-06-15

申请号：US3585637D

申请日：1968-06-04

Applicant: GEN ELECTRIC

Inventor： JONES CLIFFORD M ,  ATKINSON CHARLES E

IPC: G06F3/16 ,  H01H13/84 ,  H03K17/972 ,  G08C9/04

CPC classification number: H01H13/84 ,  G06F3/16 ,  H03K17/972

Abstract: Individual magnetic cores are associated with keys on a keyboard, and two sets of electrical conductors are threaded through the cores in opposite senses to provide code and inverse code signals. Circuit means is provided to detect a change in logic levels caused by simultaneous depression of two or more keys and to produce a data strobe output only when a single key is depressed.