Communications: electrical – Systems – Call station
Patent
1975-11-24
1978-02-14
Caldwell, Sr., John W.
Communications: electrical
Systems
Call station
340213Q, 340412, 340147LP, H04Q 900
Patent
active
040742423
ABSTRACT:
A point selection and display system for monitoring various parameters of a process, which enables the operator to select the particular parameters which are to be monitored and to select the particular display panel on which the value of each parameter is to be indicated. Also included in this system is an identification code system for indicating which parameter is being monitored by the particular display panel. The switching circuit used within this system is designed to permit the use of as many display panels as are necessary and enables the system to monitor as many process parameters as may be desired.
REFERENCES:
patent: 3290667 (1966-12-01), Stine
patent: 3543266 (1970-11-01), Morris
patent: 3611295 (1971-10-01), Sharp
patent: 3641539 (1972-02-01), Lesher
patent: 3714646 (1973-01-01), Nurnberg et al.
patent: 3913069 (1975-10-01), Rundin et al.
Caldwell Sr. John W.
Crosland Donnie L.
Hess J. Edward
Johnson Donald R.
Phillips James H.
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