US5497148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Traffic information warning system
Assignee: Cobra Electronics Corp
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Filing: 1994-08-30
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Granted: 1996-03-05
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Expires: 2014-08-30
Abstract
Abstract A traffic information warning system for conveying traffic information from a traffic advisory site to a vehicle is disclosed. The traffic warning site comprises an emergency vehicle, a roadside hazard, or the like. The system comprises a transmitter adapted for placement at the advisory site and a receiver adapted for placement at the vehicle. The transmitter includes a first oscillator for transmitting a first unmodulated carrier signal at a first frequency and a second oscillator for transmitting a second unmodulated carrier signal at a second frequency. The first and second frequencies define the traffic information. The receiver includes a detector for detecting the first and second signals and an announcing device for announcing the traffic information.
Inventors
- 👤 David C. Oliva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:16
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/16; G08G1/09; G08G1/0962; G08G1/0965; G08G1/161; G08G1/162
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
143 words
A traffic information warning system for conveying a message of traffic information from a traffic advisory site to a vehicle, the system comprising a transimitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting a first unmodulated carrier signal at a first discrete frequency and means for transmitting a second unmodulated carrier signal at a second discrete frequency, wherein said first and second frequencies are each located at a frequency location and said message is specified by the specific frequency locations of said first and second discrete frequencies; and said receiver includes means for detecting said first and second signals, means responsive to said detecting means for determining said message of said traffic information and means responsive to said determining means for announcing said message of said traffic information.
Claim 2
Dependent Claim
143 words
A traffic information warning system for conveying a message of traffic information from a traffic advisory site to a vehicle, the system comprising a transimitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting a first unmodulated carrier signal at a first discrete frequency and means for transmitting a second unmodulated carrier signal at a second discrete frequency, wherein said first and second frequencies are each located at a frequency location and said message is specified by the specific frequency locations of said first and second discrete frequencies; and said receiver includes means for detecting said first and second signals, means responsive to said detecting means for determining said message of said traffic information and means responsive to said determining means for announcing said message of said traffic information.
Claim 3
Dependent Claim
16 words
The traffic information warning system of claim 1 wherein said announcing means includes a visual display.
Claim 4
Dependent Claim
16 words
The traffic information warning system of claim 1 wherein said announcing means includes an audible sound.
Claim 5
Dependent Claim
54 words
The traffic information warning system of claim 1 wherein said receiver includes means for sweeping across a range of frequencies including said first and second frequencies to determine a time period between detection of the first and second signals, such that said time period corresponds to the difference between said first and second frequencies.
Claim 6
Dependent Claim
17 words
The traffic information warning system of claim 1 wherein said traffic advisory site comprises an emergency vehicle.
Claim 7
Dependent Claim
17 words
The traffic information warning system of claim 1 wherein said traffic advisory site comprises a roadside hazard.
Claim 8
Dependent Claim
154 words
A traffic information warning system for conveying a plurality of messages of traffic information from a traffic advisory site to a vehicle, the system comprising a transmitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting an unmodulated carrier reference signal at a first discrete frequency location and means for transmitting one of a plurality of second unmodulated carrier signals at one of a plurality of second discrete frequency locations, wherein a respective combination of the first frequency location and each of the second frequency locations specifies a particular one of said messages of traffic information; and said receiver includes means for detecting said first signal and said second, selected signal, means responsive to said detecting means for determining said message of said traffic information and means responsive to said determining means for announcing said message of said traffic information.
Claim 9
Dependent Claim
154 words
A traffic information warning system for conveying a plurality of messages of traffic information from a traffic advisory site to a vehicle, the system comprising a transmitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting an unmodulated carrier reference signal at a first discrete frequency location and means for transmitting one of a plurality of second unmodulated carrier signals at one of a plurality of second discrete frequency locations, wherein a respective combination of the first frequency location and each of the second frequency locations specifies a particular one of said messages of traffic information; and said receiver includes means for detecting said first signal and said second, selected signal, means responsive to said detecting means for determining said message of said traffic information and means responsive to said determining means for announcing said message of said traffic information.
Claim 10
Dependent Claim
103 words
A traffic information warning system for conveying traffic information from a traffic advisory site to a vehicle, the system comprising a transmitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting a plurality of unmodulated carrier signals at a respective plurality of discrete frequencies, wherein the plurality of discrete frequencies define said traffic information; and said receiver includes means for detecting said plurality of discrete frequencies, means responsive to said detecting means for determining said traffic information and means responsive to said determining means for announcing said traffic information.
Claim 11
Dependent Claim
103 words
A traffic information warning system for conveying traffic information from a traffic advisory site to a vehicle, the system comprising a transmitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting a plurality of unmodulated carrier signals at a respective plurality of discrete frequencies, wherein the plurality of discrete frequencies define said traffic information; and said receiver includes means for detecting said plurality of discrete frequencies, means responsive to said detecting means for determining said traffic information and means responsive to said determining means for announcing said traffic information.
Claim 12
Dependent Claim
135 words
A traffic information warning system for conveying a message of traffic information from a traffic advisory site to vehicle, the system comprising a transmitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting a first unmodulated carrier signal at a first frequency and means for transmitting a second unmodulated carrier signal at a second frequency, wherein said first and second frequencies are separated by a frequency difference, and said difference between said first and second frequencies specifies said message of said traffic information; and said receiver includes means for detecting said first and second signals, means responsive to said detecting means for determining said traffic information and means responsive to said determining means for announcing said message of said traffic information.
Claim 13
Dependent Claim
135 words
A traffic information warning system for conveying a message of traffic information from a traffic advisory site to vehicle, the system comprising a transmitter adapted for placement at said advisory site and a receiver adapted for placement at said vehicle, wherein: said transmitter includes means for transmitting a first unmodulated carrier signal at a first frequency and means for transmitting a second unmodulated carrier signal at a second frequency, wherein said first and second frequencies are separated by a frequency difference, and said difference between said first and second frequencies specifies said message of said traffic information; and said receiver includes means for detecting said first and second signals, means responsive to said detecting means for determining said traffic information and means responsive to said determining means for announcing said message of said traffic information.
Claim 14
Dependent Claim
54 words
The traffic information warning system of claim 9 wherein said receiver includes means for sweeping across a range of frequencies including said first and second frequencies to determine a time period between detection of the first and second signals, such that said time period corresponds to the difference between said first and second frequencies.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |