Communications: electrical – Digital comparator systems
Patent
1974-10-08
1976-04-13
Pitts, Harold I.
Communications: electrical
Digital comparator systems
340147SY, H04Q 900
Patent
active
039507289
ABSTRACT:
Synchronizing and coordination apparatus and circuit arrangement, at a junction terminal in a coded carrier remote control system where two branch communication channels diverge from the main channel from the control office, to establish and enforce a preselected order of priority for code transmission in both directions between the control office and stations connected along the main and branch channels. Each section of the channel network is provided with separate carrier apparatus to transmit codes in both directions. Retransmission means at the junction repeat control codes received from the office to all branch and satellite stations and indication codes received from these stations to the office office. Control codes from the office and indication codes from main channel stations are given first and second transmission priority, respectively. Indication codes from junction terminal satellite stations are third in priority order, over similar codes from stations along both branch channels. This is enforced by locking out such branch stations in response to the initiation of a code from a satellite station. Stations along a selected one branch are given the next order of priority, also enforced by locking out the other channel stations, which thus have the lowest priority for transmitting codes.
REFERENCES:
patent: 3288919 (1966-11-01), Abbott
patent: 3300758 (1967-01-01), Hawley
patent: 3665398 (1972-05-01), Kawai
patent: 3772651 (1973-11-01), Thyssens
Etchison Alan D.
Higgins William E.
McIntire, Jr. R. W.
Pitts Harold I.
Westinghouse Air Brake Company
Williamson, Jr. A. G.
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