Patent US2953607A successfully refreshed from Google Patents.
Patent US3229202A successfully refreshed from Google Patents.
US3229202A
Expired / Lapsed
US
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Tachometer using an eddy current signal generator
Assignee: Siemens Schuckertwerke AG
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Filing: 1962-05-29
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Granted: 1966-01-11
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Expires: 1982-05-29
Abstract
No abstract record available.
Inventors
- 👤 Wenk Euglmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A TACHOMETER COMPRISING A CONDUCTIVE ROTOR ADAPTED TO BE CONNECTED TO THE OBJECT WHOSE ROTARY SPEED IS TO BE MEASURED, A STATIONARY MAGNET INDUDCTIVELY INTERLINKED WITH SAID ROTOR FOR INDUCING CURRENTS IN SAID ROTOR DURING ROTATION THEREOF, A RETURN FLUX YOKE INDUCTIVELY INTERLINKED WITH SAID ROTOR, A HALL VOLTAGE GENERATOR POSITIONED IN SAID RETURN FLUX YOKE, AND VARIABLE ELECTRICAL MEANS LINKED WITH SAID YOKE FOR OPPOSING THE FLUX IN SAID YOKE, WHEREBY THE INPUT TO SAID ELECTRICAL MEANS CONSTITUTES A MEASURE OF THE ROTOR SPEED WHEN THE OUTPUT OF THE HALL VOLTAGE GENERATOR IS NULL.
Claim 2
Dependent Claim
95 words
A TACHOMETER COMPRISING A CONDUCTIVE ROTOR ADAPTED TO BE CONNECTED TO THE OBJECT WHOSE ROTARY SPEED IS TO BE MEASURED, A STATIONARY MAGNET INDUDCTIVELY INTERLINKED WITH SAID ROTOR FOR INDUCING CURRENTS IN SAID ROTOR DURING ROTATION THEREOF, A RETURN FLUX YOKE INDUCTIVELY INTERLINKED WITH SAID ROTOR, A HALL VOLTAGE GENERATOR POSITIONED IN SAID RETURN FLUX YOKE, AND VARIABLE ELECTRICAL MEANS LINKED WITH SAID YOKE FOR OPPOSING THE FLUX IN SAID YOKE, WHEREBY THE INPUT TO SAID ELECTRICAL MEANS CONSTITUTES A MEASURE OF THE ROTOR SPEED WHEN THE OUTPUT OF THE HALL VOLTAGE GENERATOR IS NULL.
References Cited (Backward Citations)
US3049665A
Cited
US3018395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |