Switching system for use with computer data loop terminals and m

Details Switching system for use with computer data loop terminals and m Switching system for use with computer data loop terminals and m

1976-02-11

1977-07-12

Thomas, James D.

Communications: electrical

Digital comparator systems

179 15AL, 364900, H04Q 120, H04Q 152, G06F 304

Patent

active

040357708

ABSTRACT:
A switching system for use with a plurality of data terminals connected in series in a loop, the ends of which are connected to a central computer so that the central computer may communicate with the data terminals, the system comprising a plurality of switching means; the loop being arranged in a plurality of subloops respectively corresponding to the plurality of data terminals where the data terminals are respectively disposed at the ends of the subloops remote from the central computer and the other ends of the subloops are disposed at a single location; the plurality of switching means being disposed at the single location and respectively associated with the plurality of subloops so that they are connected in series in the loop; each switching means including means for connecting its associated data terminal in circuit in the loop when the switching means is in a first position and means for immediately removing the last-mentioned data terminal and its associated input and output wires completely from the loop while substantially simultaneously shorting the open circuit introduced in the loop by the removal of the data terminal and its associated wire from the loop when the switching means is in its second position. Also disclosed is a method and apparatus for quickly locating faults on the loop. Further, there is disclosed apparatus for combining a plurality of the loops into a single combined loop whenever an internal fault occurs within the central computer whereby the single combined loop may be connected to a second remote or local computer and preselected ones of the data terminals on the loops may be connected into the single combined loop.

REFERENCES:
patent: 3458661 (1969-07-01), Forde
patent: 3519750 (1970-07-01), Beresin
patent: 3519935 (1970-07-01), Hochgraf
patent: 3652798 (1972-03-01), NcNeilly
patent: 3716834 (1973-02-01), Adams
patent: 3755789 (1973-08-01), Collins
patent: 3859468 (1975-01-01), Smith
patent: 3876983 (1975-04-01), Zafiropulo
patent: 3879710 (1975-04-01), Maxemchuk

Affiliated with

Also associated with

Rating

Switching system for use with computer data loop terminals and m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switching system for use with computer data loop terminals and m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching system for use with computer data loop terminals and m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-491004