US3178641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drag cup tachometer accelerometer
Assignee: Motors Liquidation Co
•
Filing: 1961-02-06
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Granted: 1965-04-13
•
Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 John H Varterasian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:09
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/49; G01P15/00; G01P15/003; G01P15/16; G01P15/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
APPARATUS FOR PROVIDING AN INDICATION OF THE ANGULAR VELOCITY AND ACCELERATION OF A ROTATING SHAFT COMPRISING A DRAG CUP TACHOMETER GENERATOR HAVING A ROTOR COUPLED TO SAID SHAFT, A SOURCE OF DIRECT CURRENT EXCITATION WITH AN ALTERNATING CURRENT COMPONENT SUPERIMPOSED THEREON CONNECTED ACROSS THE INPUT OF SAID GENERATOR, FIRST INDICATING MEANS RESPONSIVE TO ALTERNATING CURRENT CONNECTED ACROSS THE OUTPUT OF SAID GENERATOR, AND SECOND INDICATING MEANS RESPONSIVE TO DIRECT CURRENT CONNECTED ACROSS THE OUTPUT OF SAID GENERATOR.
Claim 2
Dependent Claim
77 words
APPARATUS FOR PROVIDING AN INDICATION OF THE ANGULAR VELOCITY AND ACCELERATION OF A ROTATING SHAFT COMPRISING A DRAG CUP TACHOMETER GENERATOR HAVING A ROTOR COUPLED TO SAID SHAFT, A SOURCE OF DIRECT CURRENT EXCITATION WITH AN ALTERNATING CURRENT COMPONENT SUPERIMPOSED THEREON CONNECTED ACROSS THE INPUT OF SAID GENERATOR, FIRST INDICATING MEANS RESPONSIVE TO ALTERNATING CURRENT CONNECTED ACROSS THE OUTPUT OF SAID GENERATOR, AND SECOND INDICATING MEANS RESPONSIVE TO DIRECT CURRENT CONNECTED ACROSS THE OUTPUT OF SAID GENERATOR.
References Cited (Backward Citations)
US2944419A
Cited
US2940038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |