Location acquisition and time adjusting system
First Claim
Patent Images
1. A portable timekeeping system, comprising:
- receiving means for receiving broadcast radiowave frequencies;
storing means for storing information indicative of sets of radiowave frequencies which are transmitted from predetermined locations so that each set corresponds to a respective one of said predetermined locations;
matching means for matching said received broadcast radiowave frequencies from said receiving means with a matching one of said sets of radiowave frequencies; and
timekeeping means for updating time indicative of a local time where said received broadcast radiowave frequencies were transmitted based on matching from said matching means.
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Abstract
An information retrieval system and method for determining the location of a traveller based upon a comparison between broadcast radiowave frequencies at the location and a table of locations for radio stations which broadcast at those radiowave frequencies. By determining the location, the offset hour for the time zone where the radio station is located may be obtained for correcting displaying the hour on an electronic watch. The location, such as a city, is also displayed so that the traveller is apprised of both the correct time and present location automatically.
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Citations
42 Claims
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1. A portable timekeeping system, comprising:
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receiving means for receiving broadcast radiowave frequencies; storing means for storing information indicative of sets of radiowave frequencies which are transmitted from predetermined locations so that each set corresponds to a respective one of said predetermined locations; matching means for matching said received broadcast radiowave frequencies from said receiving means with a matching one of said sets of radiowave frequencies; and timekeeping means for updating time indicative of a local time where said received broadcast radiowave frequencies were transmitted based on matching from said matching means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for time keeping, comprising the steps of:
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receiving broadcast radiowave frequencies; storing information indicative of sets of radiowave frequencies which are transmitted from predetermined locations so that each set corresponds to a respective one of said predetermined locations; matching said received broadcast radiowave frequencies from said receiving means with a matching one of said sets of radiowave frequencies; and updating time indicative of a local time where said received broadcast radiowave frequencies were transmitted based on the step of matching. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A portable location identification system, comprising:
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receiving means for receiving broadcast radiowave frequencies; storing means for storing information indicative of sets of radiowave frequencies which are transmitted from predetermined locations so that each set corresponds to a respective one of said predetermined locations; matching means for matching said received broadcast radiowave frequencies from said receiving means with a matching one of said sets of radiowave frequencies; and location identification means for identifying a respective one of said predetermined locations where said received broadcast radiowave frequencies were transmitted based on said matching means. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification