Communications: electrical – Systems – Call station
340409, G08B 2500
A flexible, expandable alarm control system in which varying combinations of functional circuit blocks or modules can be selected and connected in positions on a control panel by the customer or user of the system. Thus, the system can be modified to satisfy changing functional requirements by substitution of modules; furthermore, it can be expanded by adding functional modules to a given control panel or by extending the system to auxiliary control cabinets in which more circuitry can be mounted.
patent: 3550111 (1970-12-01), Ervin
patent: 3854127 (1974-12-01), Damon
General Signal Corporation
Kleinman Milton E.
Waring Alvin H.
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