US3201775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage proximity detector
Assignee: Teale & Co
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Filing: 1963-03-08
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Granted: 1965-08-17
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Expires: 1983-03-08
Abstract
No abstract record available.
Inventors
- 👤 Robert D Pedersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:54
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A TRANSISTORIZED VOLTAGE PROXIMITY DETECTOR COMPRISING: A PROBE CIRCUIT HAVING A HIGH IMPEDANCE OUTPUT; A TEMPERATURE STABILIZING TRANSISTORIZED IMPEDANCE MATCHING CIRCUIT; A TRANSISTORIZED AMPLIFICATION CIRCUIT; SAID TEMPERATURE STABILIZING TRANSISTORIZED IMPEDANCE MATCHING CIRCUIT COUPLING SAID PROBE CIRCUIT TO SAID TRANSISTORIZED AMPLIFIER CIRCUIT; A RECTIFIER CIRCUIT FOR PEAK RECTIFICATION OF THE SIGNAL FROM SAID AMPLIFIER CIRCUIT THEREBY CAUSING A DIRECT CURRENT OUTPUT SIGNAL; A TRIGGER CIRCUIT CONNECTED TO THE OUTPUT OF SAID RECTIFIER CIRCUIT AND BIASED TO CUT OFF AT A PREDETERMINED INPUT VOLTAGE LEVEL; A POWER MEANS, RELAY, INDICATING LIGHT MEANS AND AN ALARM MEANS, SAID RELAY ADAPTED TO BE ENERGIZED BY SAID OUTPUT OF SAID TRIGGER CIRCUIT BELOW CUTOFF AND CLOSE A CIRCUIT INCLUDING SAID LIGHT MEANS, AND SAID RELAY ADAPTED TO BE DE-ENERGIZED UPON SAID TRIGGER CIRCUIT BEING DRIVEN TO CUT OFF, THEREBY, INSTANTANEOUSLY CLOSING A CIRCUIT COMPRISING SAID ALARMS MEANS AND SAID POWER MEANS.
Claim 2
Dependent Claim
146 words
A TRANSISTORIZED VOLTAGE PROXIMITY DETECTOR COMPRISING: A PROBE CIRCUIT HAVING A HIGH IMPEDANCE OUTPUT; A TEMPERATURE STABILIZING TRANSISTORIZED IMPEDANCE MATCHING CIRCUIT; A TRANSISTORIZED AMPLIFICATION CIRCUIT; SAID TEMPERATURE STABILIZING TRANSISTORIZED IMPEDANCE MATCHING CIRCUIT COUPLING SAID PROBE CIRCUIT TO SAID TRANSISTORIZED AMPLIFIER CIRCUIT; A RECTIFIER CIRCUIT FOR PEAK RECTIFICATION OF THE SIGNAL FROM SAID AMPLIFIER CIRCUIT THEREBY CAUSING A DIRECT CURRENT OUTPUT SIGNAL; A TRIGGER CIRCUIT CONNECTED TO THE OUTPUT OF SAID RECTIFIER CIRCUIT AND BIASED TO CUT OFF AT A PREDETERMINED INPUT VOLTAGE LEVEL; A POWER MEANS, RELAY, INDICATING LIGHT MEANS AND AN ALARM MEANS, SAID RELAY ADAPTED TO BE ENERGIZED BY SAID OUTPUT OF SAID TRIGGER CIRCUIT BELOW CUTOFF AND CLOSE A CIRCUIT INCLUDING SAID LIGHT MEANS, AND SAID RELAY ADAPTED TO BE DE-ENERGIZED UPON SAID TRIGGER CIRCUIT BEING DRIVEN TO CUT OFF, THEREBY, INSTANTANEOUSLY CLOSING A CIRCUIT COMPRISING SAID ALARMS MEANS AND SAID POWER MEANS.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |