Communications: electrical – Condition responsive indicating system – With particular coupling link
Patent
1995-05-16
1998-07-28
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
With particular coupling link
340506, 340517, 340519, 340520, 34082506, G08B 100
Patent
active
057867577
ABSTRACT:
An alarm system for detecting and warning of the presence of alarm and trouble conditions in transponders located in a plurality of zones consisting of a loop controller having a plurality of input signal and power supply lines connected to the respective transponder units, and having a plurality of initiating and indicating devices in a respective plurality of circuits. Further, the system has a module, including a microcontroller, connected in each of the transponder units to the plurality of input lines and to the plurality of circuits, the module being capable of initiating communication of the conditions of the circuits to the loop controller. Moreover, it includes a plurality of smoke detectors, which are connected in the circuits and to respective modules. A load shed arrangement is provided for sensing the alarm conditions of the smoke detectors and reporting their conditions to the loop controller. It also permits, in the first instance, a first of the smoke detectors to draw operating current, but, thereafter, precludes the others of the plurality of smoke detectors from drawing their operating current.
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Braam Jan A.
Costa Hilario S.
Right Robert W.
General Signal Corporation
Mullen Thomas
Pope Daryl C.
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