Telephonic communications – Emergency or alarm communications
Patent
1989-10-02
1991-02-12
Ng, Jin F.
Telephonic communications
Emergency or alarm communications
379386, 379396, 340332, H04M 1104
Patent
active
049930583
ABSTRACT:
An illuminated house light display system and a telephone operated emergency indicator device for activating the display. The circuit responds to the dialing of the numeric emergency sequence "9-1-1" and the test sequence "#-9-1-1" and activates the display to provide a visual warning signal to guide summoned emergency personnel. Reset may be accomplished anytime by lifting the handset and dialing a "#". The generally cubical address display is externally mounted in a clearly visible place. The illuminated display comprises a resilient housing preferably fitted with a translucent, marked screen bearing the appropriate indicia. A bright strobe warning light is housed within the address box. The electronic circuit is mounted within a control box, and it is interconnected with the telephone line via a conventional jack. The circuit comprises a decoder which senses the dialing of digits, and an Initiation circuit interconnected with the decoder. The initiaition circuit comprises a counter, a recognition circuit, and a gate logic circuit for actuating an incrementer when the target dialing sequence occurs. The initiation circuit recognizes the symbol #, which may be dialed at the beginning of a test string of numbers to test telephone equipment. Thus the test sequence #-9-1-1 may be dialed to test the apparatus, without completing an emergency call. A disabling circuit enables a user to hang up the phone after summoning help and make a subsequent call, without stopping the alarm state.
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Hasten Systems, Greensboro, North Carolina, "The Hasten 500-911", Owner Manual .COPYRGT. 1987.
Lloyd Thomas L.
McMinn Edward W.
Middleton Jack
Carver Stephen D.
Chan Wing F.
Ng Jin F.
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