公开(公告)号：US2492769A

公开(公告)日：1949-12-27

申请号：US7684449

申请日：1949-02-16

Applicant: GEN ELECTRIC

Inventor： SNELL JACOB K

IPC: H05K7/12

CPC classification number: H05K7/12

公开(公告)号：US3568183A

公开(公告)日：1971-03-02

申请号：US3568183D

申请日：1968-07-09

Applicant: GEN ELECTRIC

Inventor： SNELL JACOB K ,  LAREW JOHN J ,  JONES CLIFFORD M

IPC: G06F3/12 ,  G06F3/16 ,  H01H13/84 ,  H04L15/12

CPC classification number: G06F3/16 ,  G06F3/12 ,  H01H13/84

Abstract: In a keyboard printer arrangement utilizing the multibit, binary coded digital signals representative of the printable symbols associated with an operated key to generate separate sounds synchronized with key operation and audibly distinguishable from nonsynchronized or changing printing sounds.