Communications: electrical – Selective – Having indication or alarm
Patent
1973-11-05
1976-10-05
Yusko, Donald J.
Communications: electrical
Selective
Having indication or alarm
325 53, 325 55, G08G 112, H04B 100
Patent
active
039848078
ABSTRACT:
A vehicle location system having a plurality of stationary wayside stations positioned at predetermined geographical locations. The passage of a vehicle near a station references the location of the vehicle at that point in time and automatically supplies the remote headquarters with updated information as to the whereabouts of all vehicles operating in the system. The system enables low power radio frequency signals to automatically communicate error free location information between the wayside station and the vehicle by maintaining the integrity of the signal. Automatic transmission to a remote headquarters of a precoded message such as an emergency communication can be initiated from either the vehicle or a portable transmitter. A common radio frequency channel may be used for transmittal of both audio and digitally encoded messages to and from a plurality of vehicles and a discriminator in each vehicle automatically selects and displays only those digital communications directed to it. Simultaneous automatic transmissions on the same radio frequency channel are avoided by delaying energizing the vehicle transmitter until the preselected channel is open. Unpleasant and distracting noise in the vehicle is minimized by turning off the audio speaker during reception of digitally encoded data.
REFERENCES:
patent: 3629837 (1971-12-01), Fraunfelder
patent: 3633168 (1972-01-01), Dixon et al.
patent: 3644883 (1972-02-01), Borman et al.
patent: 3646580 (1972-02-01), Fuller
patent: 3662267 (1972-05-01), Reed
patent: 3665313 (1972-05-01), Trent
patent: 3678391 (1972-07-01), Gough
patent: 3689843 (1972-09-01), Coussell et al.
patent: 3700886 (1972-10-01), Birkin
patent: 3701024 (1972-10-01), Knowles et al.
patent: 3714650 (1973-01-01), Fuller et al.
patent: 3718899 (1973-02-01), Rollins
patent: 3720911 (1973-03-01), Bomar, Jr.
patent: 3735335 (1973-05-01), Kaplan et al.
patent: 3783445 (1974-01-01), Penwarden
Products of Information Systems
Yusko Donald J.
LandOfFree
Vehicle location system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vehicle location system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vehicle location system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-658617