Traffic error correcting circuit for traffic dispatching system

Claim 1

For use with a dispatching system circuit operable to control instructing means for selectively assigning traffic to a plurality of receiving stations in response to electrical traffic request signals and request cancel signals from said stations, a traffic error correcting circuit for each said station, comprising: a voltage source; traffic detector means for operating a switch in response to presence of traffic at said station; and first switching means, second time-delay switching means and traffic request signal generating means in circuit with said source; said first switching means being in circuit with said switch and being actuated upon operating thereof in response to presence of traffic at said station to provide a traffic request cancel signal at a first output to the dispatching circuit; de-actuation of said first switching means in response to absence of traffic at said station serving to energize said signal generating means from said source to provide a first traffic request signal at a second output to said dispatching circuit; de-actuation of said first switching means also serving to energize said second time-delay switching means in order to provide an additional traffic request signal at said second output after a predetermined time interval in the absence of traffic at said station during said interval.