US3243794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1962-08-29
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Granted: 1966-03-29
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Expires: 1982-08-29
Abstract
No abstract record available.
Inventors
- 👤 Donald T Phillips
- 👤 Warren M Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:46
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/36; H; H04; H04M; H04M19/00; H04M19/02; H04M19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN INDICATING DEVICE CAPABLE OF PRODUCING A VISUAL OUTPUT SIGNAL IN RESPONSE TO AN INPUT SIGNAL, COMPRISING: FIRST AND SECOND PAIRS OF INPUT TERMINALS; SAID FIRST PAIR OF INPUT TERMINALS BEING ADAPTED TO RECEIVE WEAK SIGNALS REQUIRING AMPLIFICATION; AMPLIFIER MEANS CONNECTED TO SAID FIRST PAIR OF INPUT TERMINALS TO SUPPLY SAID REQUIRED AMPLIFICATION; A CAPACITOR CONNECTED ACROSS SAID SECOND PAIR OF OUTPUT TERMINALS AND TO THE OUTPUT OF SAID AMPLIFIER MEANS; OSCILLATOR MEANS; TRANSISTOR MEANS HAVING AN INPUT CONNECTED TO SAID CAPACITOR AND AN OUTPUT CONNECTED TO SAID OSCILLATOR MEANS; SAID TRANSISTOR CAUSING SAID OSCILLATOR TO BE BIASED INTO OSCILLATION WHEN A VOLTAGE APPEARS ACROSS SAID CAPACITOR; AND INDICATOR MEANS CONNECTED TO SAID OSCILLATOR MEANS; SAID INDICATOR MEANS PROVIDING A VISUAL INDICATION FOR THE DURATION OF THE TIME THAT A VOLTAGE APPEARS ACROSS SAID CAPACITOR.
Claim 2
Dependent Claim
135 words
AN INDICATING DEVICE CAPABLE OF PRODUCING A VISUAL OUTPUT SIGNAL IN RESPONSE TO AN INPUT SIGNAL, COMPRISING: FIRST AND SECOND PAIRS OF INPUT TERMINALS; SAID FIRST PAIR OF INPUT TERMINALS BEING ADAPTED TO RECEIVE WEAK SIGNALS REQUIRING AMPLIFICATION; AMPLIFIER MEANS CONNECTED TO SAID FIRST PAIR OF INPUT TERMINALS TO SUPPLY SAID REQUIRED AMPLIFICATION; A CAPACITOR CONNECTED ACROSS SAID SECOND PAIR OF OUTPUT TERMINALS AND TO THE OUTPUT OF SAID AMPLIFIER MEANS; OSCILLATOR MEANS; TRANSISTOR MEANS HAVING AN INPUT CONNECTED TO SAID CAPACITOR AND AN OUTPUT CONNECTED TO SAID OSCILLATOR MEANS; SAID TRANSISTOR CAUSING SAID OSCILLATOR TO BE BIASED INTO OSCILLATION WHEN A VOLTAGE APPEARS ACROSS SAID CAPACITOR; AND INDICATOR MEANS CONNECTED TO SAID OSCILLATOR MEANS; SAID INDICATOR MEANS PROVIDING A VISUAL INDICATION FOR THE DURATION OF THE TIME THAT A VOLTAGE APPEARS ACROSS SAID CAPACITOR.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |