Patent US3249929A successfully refreshed from Google Patents.
US3249929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring circuit for alternating current signals
Assignee: AT&T Inc
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Filing: 1963-05-16
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Granted: 1966-05-03
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Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Jr William M Sillers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
G; G08; G08B; G08B21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A MONITORING CIRCUIT FOR A SOURCE OF ALTERNATING CURRENT SIGNALS COMPRISING PAIRED INPUT AND OUTPUT TERMINALS, A SILICON CONTROLLED RECTIFIER HAVING ANODE, CATHODE, AND GATE ELEMENTS, LEADS INTERCONNECTING SAID SOURCE BETWEEN OF SAID INPUT AND OUTPUT TERMINALS, ONE OF SAID LEADS INCLUDING THE ANODE-CATHODE CIRCUIT OF SAID SILICON CONTROLLED RECTIFIER, MEANS CONNECTING SAID SOURCE BETWEEN SAID INPUT TERMINALS, INDICATING MEANS CONNECTED BETEEN SAID OUTPUT TERMINALS, MEANS FOR APPLYING A SAMPLE OF ADJUSTABLE MAGNITUDE OF THE SIGNAL FROM SAID SOURCE TO THE GATE ELEMENT OF SAID SILICON CONTROLLED RECTIFIER, SAID APPLYING MEANS INCLUDING MEANS FOR RECTIFYING THE SAMPLE SO APPLIED, AND ADJUSTABLE MEANS RESPONSIVE TO AN OUTPUT FROM SAID SILICON CONTROLLED RECTIFIER FOR CHANGING THE MAGNITUDE OF SAID SAMPLE APPLIED TO SAID SILICON CONTROLLED RECTIFIER.
Claim 2
Dependent Claim
124 words
A MONITORING CIRCUIT FOR A SOURCE OF ALTERNATING CURRENT SIGNALS COMPRISING PAIRED INPUT AND OUTPUT TERMINALS, A SILICON CONTROLLED RECTIFIER HAVING ANODE, CATHODE, AND GATE ELEMENTS, LEADS INTERCONNECTING SAID SOURCE BETWEEN OF SAID INPUT AND OUTPUT TERMINALS, ONE OF SAID LEADS INCLUDING THE ANODE-CATHODE CIRCUIT OF SAID SILICON CONTROLLED RECTIFIER, MEANS CONNECTING SAID SOURCE BETWEEN SAID INPUT TERMINALS, INDICATING MEANS CONNECTED BETEEN SAID OUTPUT TERMINALS, MEANS FOR APPLYING A SAMPLE OF ADJUSTABLE MAGNITUDE OF THE SIGNAL FROM SAID SOURCE TO THE GATE ELEMENT OF SAID SILICON CONTROLLED RECTIFIER, SAID APPLYING MEANS INCLUDING MEANS FOR RECTIFYING THE SAMPLE SO APPLIED, AND ADJUSTABLE MEANS RESPONSIVE TO AN OUTPUT FROM SAID SILICON CONTROLLED RECTIFIER FOR CHANGING THE MAGNITUDE OF SAID SAMPLE APPLIED TO SAID SILICON CONTROLLED RECTIFIER.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |