公开(公告)号：US2787657A

公开(公告)日：1957-04-02

申请号：US8410449

申请日：1949-03-29

Applicant: INT STANDARD ELECTRIC CORP

Inventor： JOHN TERRY VICTOR ,  RIDLER DESMOND SYDNEY ,  WEIR DONALD ADAMS

IPC: H04L5/16 ,  H04L12/26 ,  H04L25/04 ,  H04L25/12 ,  H04L25/24

CPC classification number: H04L1/248 ,  H04L5/16 ,  H04L25/12 ,  H04L25/245 ,  H04L43/50

公开(公告)号：US2904778A

公开(公告)日：1959-09-15

申请号：US62136156

申请日：1956-11-09

Applicant: INT STANDARD ELECTRIC CORP

Inventor： WEIR DONALD ADAMS

IPC: G06F11/07 ,  G11C11/06 ,  G11C29/00 ,  G11C29/02 ,  G11C29/40 ,  H04Q3/00

CPC classification number: G06F11/0769 ,  G06F11/0727 ,  G06F11/0766 ,  G11C11/06014 ,  G11C29/00 ,  G11C29/02 ,  G11C29/40 ,  H04Q3/00

Abstract: 904,335. Data-processing equipment. STANDARD TELEPHONES & CABLES Ltd. March 11, 1960 [March 13, 1959], No. 8805/59. Class 106 (1). A recording system records a series of 0's while the associated data-processing equipment is functioning properly. When a fault occurs, however, 1 is recorded after which recording ceases. Playback of the record indicates the whereabouts of the fault. A bi-stable device 10 is set to 0 to energize a write circuit 2 which records a series of 0's on a magnetic drum 1. A fault applies a potential to terminal 8, so reversing the bistable device 10. The write circuit 2 then records 1 after which the write circuit is disabled by the absence of potential on lead 7. When the record is played back at the same time as a clock track a two-beam oscilloscope 5 indicates the time of the fault and its position in a scanning system.