Patent US3230389A successfully refreshed from Google Patents.
US3230389A
Expired / Lapsed
US
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Transistorized current transfer apparatus
Assignee: Westinghouse Air Brake Co
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Filing: 1962-05-23
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Granted: 1966-01-18
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Expires: 1982-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas J Blocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:09
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/945; H03K17/95; H03K17/952; B; B61; B61L; B61L1/00; B61L1/02; B61L1/10; H03K5/00; H03K5/153; H03K5/1536
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A CIRCUIT FOR DISCERNING BETWEEN LEGITIMATE SIGNALS AND NOISE SIGNALS FROM A SOURCE FOR PROVIDING AN OUTPUT TO A VOLTAGE SENSITIVE LOAD, A TRIGGER CIRCUIT HAVING A NORMALLY CONDUCTING FIRST STAGE AND A NORMALLY NONCONDUCTING SECOND STAGE, AMPLIFIER MEANS RESPONSIVE TO THE SIGNALS FROM SAID SOURCE FOR RENDERING THE FIRST STAGE OF SAID TRIGGERCIRCUIT NONCONDUCTING AND THE SECOND STAGE CONDUCTING DURING A PORTION OF SAID SIGNALS, AND A FREQUENCY SENSITIVE NETWORK INCLUDING A CAPACITOR, A FIRST AND A SECOND RESISTOR, AND A FIRST AND A SECOND DIODE, SAID CAPACITOR ARRANGED TO DISCHARGE THROUGH SAID FIRST CAPACITOR AND SAID FIRST DIODE DURING THE CONDUCTING CONDITION OF SAID SECOND STAGE AND TO CHARGE THROUGH SAID SECOND RESISTOR AND SAID SECOND DIODE DURING THE NONCONDUCTING CONDITION OF SAID SECOND STAGE FOR PROVIDING AN OUTPUT THROUGH SAID LOAD.
Claim 2
Dependent Claim
134 words
A CIRCUIT FOR DISCERNING BETWEEN LEGITIMATE SIGNALS AND NOISE SIGNALS FROM A SOURCE FOR PROVIDING AN OUTPUT TO A VOLTAGE SENSITIVE LOAD, A TRIGGER CIRCUIT HAVING A NORMALLY CONDUCTING FIRST STAGE AND A NORMALLY NONCONDUCTING SECOND STAGE, AMPLIFIER MEANS RESPONSIVE TO THE SIGNALS FROM SAID SOURCE FOR RENDERING THE FIRST STAGE OF SAID TRIGGERCIRCUIT NONCONDUCTING AND THE SECOND STAGE CONDUCTING DURING A PORTION OF SAID SIGNALS, AND A FREQUENCY SENSITIVE NETWORK INCLUDING A CAPACITOR, A FIRST AND A SECOND RESISTOR, AND A FIRST AND A SECOND DIODE, SAID CAPACITOR ARRANGED TO DISCHARGE THROUGH SAID FIRST CAPACITOR AND SAID FIRST DIODE DURING THE CONDUCTING CONDITION OF SAID SECOND STAGE AND TO CHARGE THROUGH SAID SECOND RESISTOR AND SAID SECOND DIODE DURING THE NONCONDUCTING CONDITION OF SAID SECOND STAGE FOR PROVIDING AN OUTPUT THROUGH SAID LOAD.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |