Communications: electrical – Continuously variable indicating – With meter reading
Patent
1988-03-01
1990-05-22
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340307, 34082529, 340539, 379 49, 379 59, G08B 108, H04M 1104
Patent
active
049280996
ABSTRACT:
Each of a large number of geographically distributed call boxes asynchronously transmits unique code-identified digital messages for taxicab request, vanadalism alarm, low power, or on-line status by Frequency Shift Keyed Bi-phase Modulated radio. To ensure receipt of any simultaneous, conflicting, messages at a central receiver, each call box repeats transmission of its messages three times at intervals. For human-initiated taxicab requests the call box itself feeds back a "cab dispatched" visual indication to satisfy the requestor after a predetermined delay. However, this indication actually represents only a highly probable occurrence and is not generated in response to an actual dispatch at a central location. The centrally received messages are processed by digital computer to eliminate redundance, display requests to a dispatcher of service, an log all requests and responses thereto.
REFERENCES:
patent: 4176254 (1979-11-01), Tuttle et al.
patent: 4406995 (1983-09-01), May
patent: 4614945 (1986-09-01), Brunius et al.
patent: 4724538 (1988-02-01), Farrell
patent: 4737783 (1988-04-01), Tanaka et al.
patent: 4788711 (1988-11-01), Nasco, Jr.
Pudpud E. O.
Yusko Donald J.
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