Apparatus for signalling system

Details Apparatus for signalling system Apparatus for signalling system

1979-11-14

1981-12-29

Popek, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340516, H04M 1104

Patent

active

043084303

ABSTRACT:
Apparatus for a signalling system. The signalling system includes a remote control unit arranged to communicate with a centralized communications center. The remote control unit operates at or following a specified time of day to initiate a self-check call and to communicate data to the communications center. The communications center includes a disc unit which stores therein self-check timing data specifying the time of day at which the remote control unit is scheduled to initiate a self-check call. A computer at the communications center receives data from the remote control unit and operates in response thereto to update the self-check timing data in the disc unit to specify the time of day at which the next self-check call is to be initiated by the remote control unit. In the absence of data from the remote control unit, there is no updating of the self-check timing data. On a regular basis, the self-check timing data in the disc unit is compared with time-of-day data produced by a clock and representing the present time of day. In the event the self-check timing data in the disc unit specifies a time of day earlier by more than a predetermined amount than the present time of day, the computer operates to produce an output condition indicating a missing or late self-check call. The output conditions may be used in the preparation of a hard-copy printout for maintenance purposes.

REFERENCES:
patent: 4086434 (1978-04-01), Bocchi
Dudley Lynch, "Two-way Cable TV Protects America's Safest Town", Popular Science, Jul. 1977, pp. 70-71.
Contact Corp. packet, two brochures entitled "There's a Killer in Your Home" and "Contact Your Lease on Life", May 15, 1979.
Descriptive material, "The Dey Mey Medical Monitoring System", undated.

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