Installation for informing users of a bus network about waiting times for the buses
First Claim
1. An installation for informing the users of a bus network on bus waiting times at stops of the network, the installation comprising means including central station for collecting data identifying the instantaneous positions of various buses travelling along the various lines of the network, means for generating electrical signals on the basis of said data for the purpose of providing information about said positions, and means for transmitting said signals over an electromagnetic path;
- and a plurality of portable receive appliances each including means for receiving said signals and for selecting, from said signals, selected signals relating to the buses expected at a given stop of a given line of the network, and means for using the selected signals in displaying the waiting times for said buses at said stop, said signals received by said appliances including electromagnetic check signals including coded identification symbols and each portable receiver appliance further comprising an appliance identification circuit including a memory for recording a coded identification symbol, means for comparing said recorded symbol with coded identification symbols included in the electromagnetic check signals received by the appliance to determine whether there is a match and for initiating a validity checking operation based on said check signals contingent on a said match; and
a checking circuit for checking the validity of the appliance, said checking circuit comprising a memory for recording successive code symbols representing expiry date F and means for comparing real dates R on which the check signals are transmitted with each expiry dated F recorded during a given period to determine whether there is a correct match, and for making access of signals to operating circuits of the appliance contingent on a said correct match, the central station further including means for generating and transmitting said encoded check signals for identification by the appliances, and for enabling comparing of the real dates R with the expiry dates F recorded in the appliances.
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Accused Products
Abstract
The installation is intended to inform users of a bus network about waiting times for buses at stops in the network, the installation including a central station suitable for transmitting radio signals relating to the real instantaneous positions of the buses and portable receiver appliances (1) suitable for displaying waiting times on their own screens (3). Each appliance has an appliance identification symbol recorded therein and also (at 11) an expiry date, and it is possible to obtain the desired displays on the screen only if said appliance is used earlier than said date. Provision is made for renewing the appliance remotely for new subscription periods at the end of each subscription.
89 Citations
5 Claims
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1. An installation for informing the users of a bus network on bus waiting times at stops of the network, the installation comprising means including central station for collecting data identifying the instantaneous positions of various buses travelling along the various lines of the network, means for generating electrical signals on the basis of said data for the purpose of providing information about said positions, and means for transmitting said signals over an electromagnetic path;
- and a plurality of portable receive appliances each including means for receiving said signals and for selecting, from said signals, selected signals relating to the buses expected at a given stop of a given line of the network, and means for using the selected signals in displaying the waiting times for said buses at said stop, said signals received by said appliances including electromagnetic check signals including coded identification symbols and each portable receiver appliance further comprising an appliance identification circuit including a memory for recording a coded identification symbol, means for comparing said recorded symbol with coded identification symbols included in the electromagnetic check signals received by the appliance to determine whether there is a match and for initiating a validity checking operation based on said check signals contingent on a said match; and
a checking circuit for checking the validity of the appliance, said checking circuit comprising a memory for recording successive code symbols representing expiry date F and means for comparing real dates R on which the check signals are transmitted with each expiry dated F recorded during a given period to determine whether there is a correct match, and for making access of signals to operating circuits of the appliance contingent on a said correct match, the central station further including means for generating and transmitting said encoded check signals for identification by the appliances, and for enabling comparing of the real dates R with the expiry dates F recorded in the appliances. - View Dependent Claims (2, 3, 4, 5)
- and a plurality of portable receive appliances each including means for receiving said signals and for selecting, from said signals, selected signals relating to the buses expected at a given stop of a given line of the network, and means for using the selected signals in displaying the waiting times for said buses at said stop, said signals received by said appliances including electromagnetic check signals including coded identification symbols and each portable receiver appliance further comprising an appliance identification circuit including a memory for recording a coded identification symbol, means for comparing said recorded symbol with coded identification symbols included in the electromagnetic check signals received by the appliance to determine whether there is a match and for initiating a validity checking operation based on said check signals contingent on a said match; and
Specification
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- Resources
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Current AssigneeJean-Claude Decaux
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Original AssigneeJean-Claude Decaux
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InventorsDecaux, Jean-Claude, Carreel, Eric, Lewiner, Jacques
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Primary Examiner(s)Swarthout, Brent A.
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Assistant Examiner(s)Lee, Benjamin C.
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Application NumberUS08/253,009Time in Patent Office586 DaysField of Search340/994, 340/988, 340/905, 340/995, 340/932.2, 340/928US Class Current340/994CPC Class CodesG07B 15/00 Arrangements or apparatus f...G07B 15/063 using wireless information ...G07F 17/0042 for hiring of objectsG08G 1/123 indicating the position of ...
