US3172075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for furnishing information as to positioning of objects
Assignee: National Research Development Corp UK
•
Filing: 1962-01-02
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Granted: 1965-03-02
•
Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Kay Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:27
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/32; G01S15/34; G01S15/88; Y; Y10; Y10S; Y10S367/00; Y10S367/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
314 words
AN AID FOR A BLIND PERSON FOR DETECTING THE PRESENCE OF AN OBJECT COMPRISING, TRANSMITTING MEANS FOR GENERATING AN ELECTRICAL CARRIER WAVE SIGNAL OF ULTRASONIC FREQUENCY, MEANS FOR FREQUENCY MODULATING SAID CARRIER WAVE SIGNAL IN ACCORDANCE WITH A SAW-TOOTH FREQUENCY-TIME CHARACTERIC TO SWEEP SAID CARRIER WAVE THROUGH A RANGE OF FREQUENCIES WHEREOF THE HIGHEST VALUE IS AT LEAST ONE HALF AN OCTAVE HIGHER THAN THE LOWEST VALUE, TRANSUDUCER MEANS CONNECTED WITH SAID TRANSMITTING MEANS FOR RADIATING ACOUSTIC WAVE ENERGY TO THE FREQUENCY OF SAID CARRIER SIGNAL TO A FIELD OF VIEW AND FOR RECEIVING A REFLECTION OF SAID ACOUSTIC WAVE ENERGY FROM AN OBJECT THEREIN, RECEIVING MEANS ALSO CONNECTED WITH SAID TRANSDUCER MEANS FOR RECEIVING THEREFROM AN INCOMING ELECTRICAL SIGNAL OF THE FREQUENCY OF SAID REFLECTION AND INCLUDING AT LEAST ONE RECEIVING CHANNEL, MODULATOR MEANS, IN SAID CHANNEL, MEANS FOR FEEDING A LOCAL ELECTRICAL SIGNAL TO SAID MODULATOR MEANS FOR A FREQUENCY VARYING CYCLICALLY IN CONFORMITY WITH THAT OF SAID CARRIER WAVE SIGNAL TO HETERODYNE WITH SAID INCOMING SIGNAL AND PRODUCE A BEAT SIGNAL OF DIFFERENCE FREQUENCY PROPORTIONAL TO THE RANGE OF THE OBJECT AND VARYING THROUGH A RANGE OF VALUES AS THE RANGE OF SAID OBJECT VARIES FROM MAXIMUM TO MINIMUM, FILTER MEANS IN SAID CHANNEL FOR PASSING IN A SINGLE CONTINUOUS BAND ONLY BEAT SIGNALS OF LESS THAN A PREDETERMINED FREQUENCY CORRESPONDING TO SAID MAXIMUM RANGE DOWN TO THOSE CORRESPONDING TO SAID MINIMUM RANGE, THE FORMER HAVING A VALUE OF PLURALITY OF TIMES SMALLER THAN SAID RANGE OF VALUES THROUGH WHICH SAID CARRIER WAVE SIGNAL IS VARIED, MEANS FOR PRESENTING SAID BEAT SIGNAL, CONSISTING ONLY OF SOUND REPRODUCING MEANS, CONNECTED TO SAID FILTER MEANS FOR GENERATING AN AUDIBLE SIGNAL OF THE FREQUENCY OF ALL OF SAID BEAT SIGNALS CONCURRENTLY PASSED BY SAID FILTER MEANS, AND PORTABLE MOUNTING MEANS MOVABLE BY SAID PERSON INTO DIFFERENT ORIENTATIONS AND CARRYING AT LEAST SAID TRANSDUCER MEANS.
Claim 2
Dependent Claim
314 words
AN AID FOR A BLIND PERSON FOR DETECTING THE PRESENCE OF AN OBJECT COMPRISING, TRANSMITTING MEANS FOR GENERATING AN ELECTRICAL CARRIER WAVE SIGNAL OF ULTRASONIC FREQUENCY, MEANS FOR FREQUENCY MODULATING SAID CARRIER WAVE SIGNAL IN ACCORDANCE WITH A SAW-TOOTH FREQUENCY-TIME CHARACTERIC TO SWEEP SAID CARRIER WAVE THROUGH A RANGE OF FREQUENCIES WHEREOF THE HIGHEST VALUE IS AT LEAST ONE HALF AN OCTAVE HIGHER THAN THE LOWEST VALUE, TRANSUDUCER MEANS CONNECTED WITH SAID TRANSMITTING MEANS FOR RADIATING ACOUSTIC WAVE ENERGY TO THE FREQUENCY OF SAID CARRIER SIGNAL TO A FIELD OF VIEW AND FOR RECEIVING A REFLECTION OF SAID ACOUSTIC WAVE ENERGY FROM AN OBJECT THEREIN, RECEIVING MEANS ALSO CONNECTED WITH SAID TRANSDUCER MEANS FOR RECEIVING THEREFROM AN INCOMING ELECTRICAL SIGNAL OF THE FREQUENCY OF SAID REFLECTION AND INCLUDING AT LEAST ONE RECEIVING CHANNEL, MODULATOR MEANS, IN SAID CHANNEL, MEANS FOR FEEDING A LOCAL ELECTRICAL SIGNAL TO SAID MODULATOR MEANS FOR A FREQUENCY VARYING CYCLICALLY IN CONFORMITY WITH THAT OF SAID CARRIER WAVE SIGNAL TO HETERODYNE WITH SAID INCOMING SIGNAL AND PRODUCE A BEAT SIGNAL OF DIFFERENCE FREQUENCY PROPORTIONAL TO THE RANGE OF THE OBJECT AND VARYING THROUGH A RANGE OF VALUES AS THE RANGE OF SAID OBJECT VARIES FROM MAXIMUM TO MINIMUM, FILTER MEANS IN SAID CHANNEL FOR PASSING IN A SINGLE CONTINUOUS BAND ONLY BEAT SIGNALS OF LESS THAN A PREDETERMINED FREQUENCY CORRESPONDING TO SAID MAXIMUM RANGE DOWN TO THOSE CORRESPONDING TO SAID MINIMUM RANGE, THE FORMER HAVING A VALUE OF PLURALITY OF TIMES SMALLER THAN SAID RANGE OF VALUES THROUGH WHICH SAID CARRIER WAVE SIGNAL IS VARIED, MEANS FOR PRESENTING SAID BEAT SIGNAL, CONSISTING ONLY OF SOUND REPRODUCING MEANS, CONNECTED TO SAID FILTER MEANS FOR GENERATING AN AUDIBLE SIGNAL OF THE FREQUENCY OF ALL OF SAID BEAT SIGNALS CONCURRENTLY PASSED BY SAID FILTER MEANS, AND PORTABLE MOUNTING MEANS MOVABLE BY SAID PERSON INTO DIFFERENT ORIENTATIONS AND CARRYING AT LEAST SAID TRANSDUCER MEANS.
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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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |