Patent US3159772A successfully refreshed from Google Patents.
US3159772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marginal monitoring device
Assignee: US Philips Corp
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Filing: 1961-03-22
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Granted: 1964-12-01
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Expires: 1981-03-22
Abstract
No abstract record available.
Inventors
- 👤 Willem Van Doorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:05
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/16; H03; H03K; H03K17/00; H03K17/30; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/2893; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/06; H04B3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
A CIRCUIT RESPONSIVE TO THE LEVEL OF A DIRECT VOLTAGE WITHIN THE RANGE BETWEEN A PREDETERMINED FIRST LEVEL AND A PREDETERMINED SECOND LEVEL OF GREATER ABSOLUTE MAGNITUDE THAN SAID FIRST LEVEL, SAID CIRCUIT COMPRISING A SOURCE OF SAID DIRECT VOLTAGE, FIRST AND SECOND BISTABLE TRIGGER CIRCUITS, EACH OF SAID TRIGGER CIRCUITS HAVING AN INPUT CIRCUIT, AN OUTPUT CIRCUIT, AND HAVING FIRST AND SECOND STABLE CONDUCTION STATES IN THE RESPECTIVE OUTPUT CIRCUITS DEPENDENT UPON THE VOLTAGE APPLIED TO THE RESPECTIVE INPUT CIRCUIT, EACH OF SAID BISTABLE TRIGGER CIRCUITS HAVING A FEEDBACK CIRCUIT WHEREBY ONLY SAID FIRST AND SECOND STABLE CONDUCTION STATES CAN OCCUR IN THE RESPECTIVE OUTPUT CIRCUITS, SAID FIRST AND SECOND TRIGGER CIRCUITS BEING RESPONSIVE TO CHANGE CONDUCTION STATES AT SAID FIRST ANDSECOND LEVELS RESPECTIVELY, MEANS APPLYING SAID DIRECT VOLTAGE TO THE INPUT CIRCUITS OF SAID FIRST AND SECOND TRIGGER CIRCUITS, MEANS CONNECTING THE OUTPUT CIRCUIT OF SAID FIRST TRIGGER CIRCUIT TO THE FEEDBACK CIRCUIT OF SAID SECOND TRIGGER CIRCUIT WHEREBY A CHANGE OF CONDUCTION STATE OF SAID FIRST TRIGGER CIRCUIT PRODUCES A CHANGE IN THE CONDUCTION STATE OF SAID SECOND TRIGGER CIRCUIT, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE OUTPUT CIRCUIT OF SAID SECOND TRIGGER CIRCUIT.
Claim 2
Dependent Claim
197 words
A CIRCUIT RESPONSIVE TO THE LEVEL OF A DIRECT VOLTAGE WITHIN THE RANGE BETWEEN A PREDETERMINED FIRST LEVEL AND A PREDETERMINED SECOND LEVEL OF GREATER ABSOLUTE MAGNITUDE THAN SAID FIRST LEVEL, SAID CIRCUIT COMPRISING A SOURCE OF SAID DIRECT VOLTAGE, FIRST AND SECOND BISTABLE TRIGGER CIRCUITS, EACH OF SAID TRIGGER CIRCUITS HAVING AN INPUT CIRCUIT, AN OUTPUT CIRCUIT, AND HAVING FIRST AND SECOND STABLE CONDUCTION STATES IN THE RESPECTIVE OUTPUT CIRCUITS DEPENDENT UPON THE VOLTAGE APPLIED TO THE RESPECTIVE INPUT CIRCUIT, EACH OF SAID BISTABLE TRIGGER CIRCUITS HAVING A FEEDBACK CIRCUIT WHEREBY ONLY SAID FIRST AND SECOND STABLE CONDUCTION STATES CAN OCCUR IN THE RESPECTIVE OUTPUT CIRCUITS, SAID FIRST AND SECOND TRIGGER CIRCUITS BEING RESPONSIVE TO CHANGE CONDUCTION STATES AT SAID FIRST ANDSECOND LEVELS RESPECTIVELY, MEANS APPLYING SAID DIRECT VOLTAGE TO THE INPUT CIRCUITS OF SAID FIRST AND SECOND TRIGGER CIRCUITS, MEANS CONNECTING THE OUTPUT CIRCUIT OF SAID FIRST TRIGGER CIRCUIT TO THE FEEDBACK CIRCUIT OF SAID SECOND TRIGGER CIRCUIT WHEREBY A CHANGE OF CONDUCTION STATE OF SAID FIRST TRIGGER CIRCUIT PRODUCES A CHANGE IN THE CONDUCTION STATE OF SAID SECOND TRIGGER CIRCUIT, AND OUTPUT CIRCUIT MEANS CONNECTED TO THE OUTPUT CIRCUIT OF SAID SECOND TRIGGER CIRCUIT.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |