Phone activated emergency signaling system

Details Phone activated emergency signaling system Phone activated emergency signaling system

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.

REFERENCES:
patent: 3798375 (1974-03-01), Delisle
patent: 3860762 (1975-01-01), Klaiber et al.
patent: 4003040 (1977-01-01), Browand
patent: 4425480 (1984-01-01), Lischin
patent: 4547761 (1985-10-01), Jones
patent: 4587753 (1986-05-01), Harper
patent: 4611265 (1986-09-01), Davis
patent: 4686505 (1987-08-01), Vanderburg
patent: 4791658 (1988-12-01), Simon et al.
patent: 4878236 (1989-10-01), Ray et al.
Hasten Systems, Greensboro, North Carolina, "The Hasten 500-911", Owner Manual .COPYRGT. 1987.

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