US3155897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fault detection system having a portable radio signal generator and stationary radio receiver for detecting open circuits in an electrical conductor
Assignee: Wheland Co
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Filing: 1960-10-17
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Granted: 1964-11-03
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Expires: 1980-10-17
Abstract
No abstract record available.
Inventors
- 👤 Robert B Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:16
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
194 words
AN APPARATUS FOR DETECTING AND LOCATING AN OPEN CIRCUIT IN AN ELECTRICAL CONDUCTOR HAVING A FIRST END AND A SECOND END, COMPRISING: (A) A PORTABLE GENERATOR, PHYSICALLY DETACHED FROM SAID CONDUCTOR, FOR INDUCING A RADIO SIGNAL IN SAID CONDUCTOR WHEN SAID GENERATOR IS IN THE VICINITY OF SAID CONDUCTOR, (B) A FIRST RADIO RECEIVER CONNECTED TO SAID FIRST END FOR RECEIVING SAID RADIO SIGNAL WHEN INDUCED IN SAID CONDUCTOR BETWEEN SAID FIRST END AND SAID OPEN CIRCUIT, (C) A SECOND RADIO RECEIVER CONNECTED TO SAID SECOND END FOR RECEIVING SAID RADIO SIGNAL WHEN INDUCED IN SAID CONDUCTOR BETWEEN SAID SECOND END AND SAID OPEN CIRCUIT, (D) FIRST MEANS FOR MODULATING THE RADIO SIGNAL RECEIVED BY SAID FIRST RECEIVER WITH A FIRST AUDIO SIGNAL OF PREDETERMINED FREQUENCY. (E) FIRST MEANS FOR DETECTING THE FIRST MODULATED SIGNAL TO PRODUCE A FIRST AUDIO OUTPUT SIGNAL, (F) SECOND MEANS FOR MODULATING THE RADIO SIGNAL RECEIVED BY SAID SECOND RECEIVER WITH A SECOND AUDIO SIGNAL HAVING A DIFFERENT FREQUENCY FROM SAID FIRST AUDIO SIGNAL, (G) SECOND MEANS FOR DETECTING THE SECOND MODULATED SIGNAL TO PRODUCE A SECOND AUDIO OUTPUT SIGNAL OF DIFFERENT FREQUENCY FROM SAID FIRST AUDIO OUTPUT SIGNAL.
Claim 2
Independent Claim
194 words
AN APPARATUS FOR DETECTING AND LOCATING AN OPEN CIRCUIT IN AN ELECTRICAL CONDUCTOR HAVING A FIRST END AND A SECOND END, COMPRISING: (A) A PORTABLE GENERATOR, PHYSICALLY DETACHED FROM SAID CONDUCTOR, FOR INDUCING A RADIO SIGNAL IN SAID CONDUCTOR WHEN SAID GENERATOR IS IN THE VICINITY OF SAID CONDUCTOR, (B) A FIRST RADIO RECEIVER CONNECTED TO SAID FIRST END FOR RECEIVING SAID RADIO SIGNAL WHEN INDUCED IN SAID CONDUCTOR BETWEEN SAID FIRST END AND SAID OPEN CIRCUIT, (C) A SECOND RADIO RECEIVER CONNECTED TO SAID SECOND END FOR RECEIVING SAID RADIO SIGNAL WHEN INDUCED IN SAID CONDUCTOR BETWEEN SAID SECOND END AND SAID OPEN CIRCUIT, (D) FIRST MEANS FOR MODULATING THE RADIO SIGNAL RECEIVED BY SAID FIRST RECEIVER WITH A FIRST AUDIO SIGNAL OF PREDETERMINED FREQUENCY. (E) FIRST MEANS FOR DETECTING THE FIRST MODULATED SIGNAL TO PRODUCE A FIRST AUDIO OUTPUT SIGNAL, (F) SECOND MEANS FOR MODULATING THE RADIO SIGNAL RECEIVED BY SAID SECOND RECEIVER WITH A SECOND AUDIO SIGNAL HAVING A DIFFERENT FREQUENCY FROM SAID FIRST AUDIO SIGNAL, (G) SECOND MEANS FOR DETECTING THE SECOND MODULATED SIGNAL TO PRODUCE A SECOND AUDIO OUTPUT SIGNAL OF DIFFERENT FREQUENCY FROM SAID FIRST AUDIO OUTPUT SIGNAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |