US3267458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital voltmeters
Assignee: Gemalto Terminals Ltd
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Filing: 1962-08-20
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Granted: 1966-08-16
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 Robin N Anderson
- 👤 Howard A Dorey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:36
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AN ANALOGUE TO DIGITAL CONVERTER FOR USE AS A VOLTMETER COMPRISING: AN INTEGRATING AMPLIFIER; A SWITCH CONNECTED TO THE INPUT OF SAID AMPLIFIER FOR APPLYING THERETO A VOLTAGE TO BE MEASURED; A CIRCUIT RESPONSIVE TO AN APPLIED PULSE TO FEED A FIXED QUANTITY OF CHARGE INTO SAID AMPLIFIER IN OPPOSITION TO THE APPLIED VOLTAGE; A SOURCE OF CLOCK PULSES FOR PULSING THE SAID CIRCUIT; MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER TO PERMIT THE SAID CIRCUIT TO BE PULSED WHEN THE OUTPUT LEVEL OF SAID AMPLIFIER IS BEYOND A PREDETERMINED VALUE; MEANS RESPONSIVE TO THE CLOCK PULSES TO CLOSE THE SAID SWITCH FOR A STANDARD NUMBER OF CLOCK PULSES; AND A COUNTER FOR COUNTING THE NUMBER OF TIMES THAT THE SAID CIRCUIT IS PULSED.
Claim 2
Dependent Claim
125 words
AN ANALOGUE TO DIGITAL CONVERTER FOR USE AS A VOLTMETER COMPRISING: AN INTEGRATING AMPLIFIER; A SWITCH CONNECTED TO THE INPUT OF SAID AMPLIFIER FOR APPLYING THERETO A VOLTAGE TO BE MEASURED; A CIRCUIT RESPONSIVE TO AN APPLIED PULSE TO FEED A FIXED QUANTITY OF CHARGE INTO SAID AMPLIFIER IN OPPOSITION TO THE APPLIED VOLTAGE; A SOURCE OF CLOCK PULSES FOR PULSING THE SAID CIRCUIT; MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER TO PERMIT THE SAID CIRCUIT TO BE PULSED WHEN THE OUTPUT LEVEL OF SAID AMPLIFIER IS BEYOND A PREDETERMINED VALUE; MEANS RESPONSIVE TO THE CLOCK PULSES TO CLOSE THE SAID SWITCH FOR A STANDARD NUMBER OF CLOCK PULSES; AND A COUNTER FOR COUNTING THE NUMBER OF TIMES THAT THE SAID CIRCUIT IS PULSED.
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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |