US3248728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excess speed indicator
Assignee: International Standard Electric Corp
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Filing: 1964-03-25
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Granted: 1966-04-26
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Expires: 1984-03-25
Abstract
No abstract record available.
Inventors
- 👤 Garfield William Littery
- 👤 Rixon Brian Hugh Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/91; G01S13/913; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/103; G01P3/00; G01P3/42; G01P3/50; G01P3/62; G01S11/00; G01S11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ELECTRICAL SPEED INDICATOR TO INDICATE WHEN THE SPEED OF APPROACH OR RECESSION OF ONE BODY WITH RESPECT TO ANOTHER EXCEEDS A VALUE DEPENDENT UPON THE DISTANCE BETWEEN THE TWO BODIES INCLUDING MEANS TO PRODUCE AN ELECTRICAL SIGNAL HAVING A MAGNITUDE DEPENDENT UPON THE DISTANCE BETWEEN THE TWO BODIES, A DIFFERENTIATING CIRCUIT TO DIFFERENTIATE THE SAID PARAMETER OF THE ELECTRICAL SIGNAL WITH RESPECT TO TIME, A COMBINING CIRCUIT TO COMBINE ADDITIVELY THE ELECTRIC SIGNAL AND THE DIFFERENTIATED ELECTRIC SIGNAL, A DETECTOR TO DETECT THE POLARITY OF THE SUM OF THE SIGNALS, AND AN INDICATOR OPERATED BY AN OUTPUT SIGNAL FROM THE DETECTOR.
Claim 2
Dependent Claim
102 words
AN ELECTRICAL SPEED INDICATOR TO INDICATE WHEN THE SPEED OF APPROACH OR RECESSION OF ONE BODY WITH RESPECT TO ANOTHER EXCEEDS A VALUE DEPENDENT UPON THE DISTANCE BETWEEN THE TWO BODIES INCLUDING MEANS TO PRODUCE AN ELECTRICAL SIGNAL HAVING A MAGNITUDE DEPENDENT UPON THE DISTANCE BETWEEN THE TWO BODIES, A DIFFERENTIATING CIRCUIT TO DIFFERENTIATE THE SAID PARAMETER OF THE ELECTRICAL SIGNAL WITH RESPECT TO TIME, A COMBINING CIRCUIT TO COMBINE ADDITIVELY THE ELECTRIC SIGNAL AND THE DIFFERENTIATED ELECTRIC SIGNAL, A DETECTOR TO DETECT THE POLARITY OF THE SUM OF THE SIGNALS, AND AN INDICATOR OPERATED BY AN OUTPUT SIGNAL FROM THE DETECTOR.
References Cited (Backward Citations)
US2851120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |