Communications: electrical – Digital comparator systems
Patent
1975-06-02
1978-04-18
Pitts, Harold I.
Communications: electrical
Digital comparator systems
340147R, 340147P, H04Q 900
Patent
active
040854027
ABSTRACT:
An apparatus for remote control of a printing press having a plurality of printing units each having a number of ink fountain key actuators, avoids duplication of remote control circuitry and of wiring by multiplexing a small number of remote controls and control wires. Command data are produced at a remote station, and temporarily stored there. Command data for all of the printing units which are to be controlled are then transmitted as a serial data stream over a pair of wires to storage registers located at the printing press. Thereafter, all of the actuators are energized in accordance with the data stored in their respective registers. A complete serial data stream is transmitted to the press once for each AC cycle of the power line frequency, and the actuators move in accordance with every such transmission of data. After a predetermined time interval, during which the identical serial data stream is repeatedly transmitted, the command data which is stored at the remote control station is replaced by freshly computed data, and the entire cycle is repeated.
REFERENCES:
patent: 3110013 (1963-11-01), Breese
patent: 3166742 (1965-01-01), Sherwin
patent: 3230508 (1966-01-01), Grijseels
patent: 3491354 (1970-01-01), Tschumi
patent: 3585595 (1971-06-01), Scauin
patent: 3614765 (1971-10-01), Huber
patent: 3747524 (1973-07-01), Crum
patent: 3774536 (1973-11-01), Raymond
patent: 3866216 (1975-02-01), Tschumi
Krygeris Algirdas J.
Manring John M.
Harris-Intertype Corporation
Pitts Harold I.
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