Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
An emergency traffic control system having in combination traffic lights including at least a proceed lamp and a stop lamp for directing the flow of vehicle traffic and a control system for said lamps, said control system comprising a first means to directionally receive a directionally transmitted pulse width-modulated signal including word bits transmitted from a vehicle; second means to detect the received signal; third means responsive to the detected signal for reconstructing said signal and including a phase lock loop and a synchronization circuit to synchronize said reconstructed signal with the transmitted signal; fourth means for comparing the reconstructed signal with a preset code of bits and means responsive to the output of said fourth means to generate a control signal to initiate lamp control.
Claim 2
Dependent Claim
126 words
An emergency traffic control system having in combination traffic lights including at least a proceed lamp and a stop lamp for directing the flow of vehicle traffic and a control system for said lamps, said control system comprising a first means to directionally receive a directionally transmitted pulse width-modulated signal including word bits transmitted from a vehicle; second means to detect the received signal; third means responsive to the detected signal for reconstructing said signal and including a phase lock loop and a synchronization circuit to synchronize said reconstructed signal with the transmitted signal; fourth means for comparing the reconstructed signal with a preset code of bits and means responsive to the output of said fourth means to generate a control signal to initiate lamp control.
Claim 3
Dependent Claim
62 words
An emergency traffic control system as in claim 1 wherein the means responsive to the fourth means is a divide by n counter and a delay generator feeding a latch wherein if n good bits are received before the delay times out the latch is set and initiates lamp control wherein said latch locks out other directional receivers at the same location.
Claim 4
Dependent Claim
119 words
Means for remotely controlling a traffic light system comprising: transmitting means mounted on a vehicle for directionally emitting a signal of serial coded pulse width modulated form containing logic information, means receiving said signal, a synchronizer including means converting the signal into parallel code word form, a phase lock loop containing a voltage controlled oscillator to generate a clock output, said clock output and said signal being applied to said synchronizer whereby each portion of the received signal has the same phase as the transmitted signal, means providing a preset code of bits, means comparing the preset code of bits with the parallel form code word signal and producing an output upon coincidence, the comparator means output initiating control.
Claim 5
Dependent Claim
119 words
Means for remotely controlling a traffic light system comprising: transmitting means mounted on a vehicle for directionally emitting a signal of serial coded pulse width modulated form containing logic information, means receiving said signal, a synchronizer including means converting the signal into parallel code word form, a phase lock loop containing a voltage controlled oscillator to generate a clock output, said clock output and said signal being applied to said synchronizer whereby each portion of the received signal has the same phase as the transmitted signal, means providing a preset code of bits, means comparing the preset code of bits with the parallel form code word signal and producing an output upon coincidence, the comparator means output initiating control.
Claim 6
Dependent Claim
39 words
A device as in claim 3 wherein the output of said synchronizer and the received signal are applied to a latch, each portion of the received signal being questioned for logic level and phase angles and latched for comparison.
Claim 7
Dependent Claim
93 words
A device as in claim 3 wherein the output of the comparator means is fed to a latch and a first delay generator including an n-divider wherein if n repetitive words are received before the delay generator times out, the latch is set activating traffic lamp control and wherein a second delay generator operable over a longer period than the first delay generator supplies a reset signal to the latch to restore traffic signal in a preset time after the receiving means fails to receive a proper transmitted signal of serially coded pulses.