Telemetry system for automated remote calling and central dispatch of services, particularly taxicabs
First Claim
1. A telemetry system for remote registration of requests for services to a central dispatch of such services, the system comprising:
- a plurality of call boxes each transmitting an individually unique digital code upon such times as services are requested, each call box includinga time delay means for timing a first predetermined time period after transmitting of the digital code during which first time period the transmitting of digital code is inhibited; and
a central station receiving the digital codes upon the times services are requested from the plurality of all boxes, and for digitally processing the codes to produce a display intelligible to a human to permit dispatching by said human of a requested service to a requesting call box location.
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Accused Products
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.
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Citations
17 Claims
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1. A telemetry system for remote registration of requests for services to a central dispatch of such services, the system comprising:
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a plurality of call boxes each transmitting an individually unique digital code upon such times as services are requested, each call box including a time delay means for timing a first predetermined time period after transmitting of the digital code during which first time period the transmitting of digital code is inhibited; and a central station receiving the digital codes upon the times services are requested from the plurality of all boxes, and for digitally processing the codes to produce a display intelligible to a human to permit dispatching by said human of a requested service to a requesting call box location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In a telemetry system having
a plurality of transmitters each manually asynchronously initiatable at times for independently transmitting at times its unique identification, a receiver receiving the transmitted identifications of the plurality of transmitters and recognizing each such transmitted identification to be a request for a service, and a communications channel between the plurality of transmitters and the receiver upon which communications channel all the unique identifications must travel, wherein transmission of two or more identifications within a short period of time by two or more of the plurality of transmitters upon the single communications channel results in an improper recognition by the one receiver of the number of separate requests for a service that are outstanding to the one receivers because multiple asynchronous manual initializations of the transmitter within the short period of time really represent only one separate request for the service a method for reducing the erroneous recognition of multiple separate requests, the method comprising: -
suspending the next transmission of each of a plurality of transmitters, upon those times that each does independently transmit its unique identification code, for an interval of time; and transmitting at each of the plurality of transmitters only one unique identification code in response to one or more manual asynchronous initiations received during the interval of time; and receiving at a receiver the one unique identification code transmitter at times from each of the plurality of transmitters during the interval of time; and recognizing each received identification code to be a separate request for a service.
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16. In a telemetry system having
call boxes unidirectionally communicating service requests to a central station, and a central station receiving the service requests from the call boxes, an improved call box directed to (i) reducing the number of redundant service requests resultant from multiple registration of a single request for service by a person at a call box, while (ii) providing positive feedback response to the person registering a request for service at the call box without involvement of the central station to the call box whereat the service request is registered, the improved call box comprising: -
a time delay means, actuated by a person'"'"'s registration of a request for service at the call box, for producing a signal for a delay time interval; a service request inhibit means responsive to the delay time interval signal for inhibiting any further service request from the call box to the central station during the delay time interval regardless of the number of requests for services that are registered during the delay time interval; and an indicator responsive to the delay time interval signal for displaying to the person an indication that the request for service is acknowledged. - View Dependent Claims (17)
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Specification