US3146432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Velocity or frequency sensing means
Assignee: Ampex Corp
•
Filing: 1960-10-03
•
Granted: 1964-08-25
•
Expires: 1980-10-03
Abstract
No abstract record available.
Inventors
- 👤 Andrew L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:30
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/54; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A SENSING CIRCUIT FOR DETERMINING A PRESELECTED INPUT FREQUENCY, COMPRISING: MEANS FOR PRODUCING FIRST PULSES OF A PREDETERMINED TIME DURATION RESPONSIVE TO SAID INPUT, SAID TIME DURATION BEING LESS THAN THE PERIOD OF SAID PRESELECTED FREQUENCY, MEANS RESPONSIVE TO TERMINATION OF SAID FIRST PULSES FOR PRODUCING CORRESPONDING SECOND PULSES EACH BEGINNING WITH THE TERMINATION OF A CORRESPONDING FIRST PULSE AND HAVING A PREDETERMINED TIME DURATION GREATER THAN THE DIFFERENCE BETWEEN SAID PERIOD AND THE DURATION OF SAID CORRESPONDING FIRST PULSE, THE TIME DURATION FROM BEGINNING TO END OF EACH PAIR OF CORRESPONDING FIRST AND SECOND PULSES BEING SLIGHTLY GREATER THAN THE PERIOD OF SAID INPUT AT THE PRESELECTED FREQUENCY, AND GATING MEANS COUPLED DIRECTLY TO SAID FIRST AND SECOND NAMED MEANS FOR RECEIVING SAID FIRST AND SECOND PULSES AND DEVELOPING AN OUTPUT AT COINCIDENCE.
Claim 2
Dependent Claim
134 words
A SENSING CIRCUIT FOR DETERMINING A PRESELECTED INPUT FREQUENCY, COMPRISING: MEANS FOR PRODUCING FIRST PULSES OF A PREDETERMINED TIME DURATION RESPONSIVE TO SAID INPUT, SAID TIME DURATION BEING LESS THAN THE PERIOD OF SAID PRESELECTED FREQUENCY, MEANS RESPONSIVE TO TERMINATION OF SAID FIRST PULSES FOR PRODUCING CORRESPONDING SECOND PULSES EACH BEGINNING WITH THE TERMINATION OF A CORRESPONDING FIRST PULSE AND HAVING A PREDETERMINED TIME DURATION GREATER THAN THE DIFFERENCE BETWEEN SAID PERIOD AND THE DURATION OF SAID CORRESPONDING FIRST PULSE, THE TIME DURATION FROM BEGINNING TO END OF EACH PAIR OF CORRESPONDING FIRST AND SECOND PULSES BEING SLIGHTLY GREATER THAN THE PERIOD OF SAID INPUT AT THE PRESELECTED FREQUENCY, AND GATING MEANS COUPLED DIRECTLY TO SAID FIRST AND SECOND NAMED MEANS FOR RECEIVING SAID FIRST AND SECOND PULSES AND DEVELOPING AN OUTPUT AT COINCIDENCE.
References Cited (Backward Citations)
US2451816A
Cited
US2563879A
Cited
US2685082A
Cited
US2769949A
Cited
US2933729A
Cited
US2968803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |