US3234340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone line trouble locater
Assignee: Individual
•
Filing: 1961-08-04
•
Granted: 1966-02-08
•
Expires: 1981-08-04
Abstract
No abstract record available.
Inventors
- 👤 Keith E Youdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:38
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08; G01R31/11; H; H04; H04M; H04M3/00; H04M3/22; H04M3/26; H04M3/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A MEASURING INSTRUMENT COMPRISING MEANS FOR COUPLING THE INSTRUMENT TO A SOURCE OF ALTERNATING CURRENT, GENERATOR MEANS FOR CONVERTING SAID ALTERNATING CURRENT TO PULSED WAVES ROUNDED OUT TO MAKE THE WAVES APPROACH A SINE WAVE FORMATION, A NON-INDUCTIVE RESISTANCE HYBRID CONNECTED TO THE GENERATING MEANS, OUTPUT TERMINALS ON THE RESISTANCE HYBRID FOR CONNECTION TO A PAIR OF LINES UNDER TEST, THE WAVE FROM AT THE OUTPUT TERMINALS BEING UNDISTORTED FROM THE INITIAL FORM AS CREATED BY THE GENERATOR MEANS, AN ECHO RECEIVER CONNECTED TO THE RESISTANCE HYBRID TO RECEIVE ECHOES FROM THE LINES, A CATHODE RAY TUBE IN THE OUTPUT OF THE RECEIVER, THE VERTICAL DEFLECTION OF THE CATHODE RAY TUBE CORRESPONDING TO THE MAGNITUDE
References Cited (Backward Citations)
GB566022A
Cited
US2651752A
Cited
US2650345A
Cited
US2629024A
Cited
US2685066A
Cited
US2705744A
Cited
DE1100802B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |