Patent US3149276A successfully refreshed from Google Patents.
US3149276A
Expired / Lapsed
US
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Rotation measuring device
Assignee: TDK Micronas GmbH
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Filing: 1961-09-26
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Granted: 1964-09-15
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Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 Merle N Hirsh
- 👤 Philip N Eisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:44
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1279
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A DEVICE FOR MEASURING ROTATION COMPRISING A TRUNCATED SPHERICAL SHELL OF SUPERCONDUCTIVE MATERIAL, MEANS TO PRODUCE A CURRENT FLOW IN A FIXED PLANE IN SAID SUPERCONDUCTIVE MATERIAL TO PROVIDE A MAGNETIC FIELD HAVING A GIVEN ORIENTATION IN INERTIAL SPACE, MEANS TO REDUCE THE TEMPERATURE OF SAID SHELL TO THE SUPERCONDUCTIVE STATE WHEREBY SAID CURRENT FLOW AND SAID MAGNETIC FIELD ARE MAINTAINED IN A LOSSLESS CONDITION AFTER SAID MEANS TO PRODUCE SAID CURRENT FLOW IS SWITCHED OFF, AN ANISOTROPIC PARAMAGNETIC ELEMENT MOUNTED TO SAID SHELL AND DISPOSED IN SAID MAGNETIC FIELD FOR FREE ROTATION WITH RESPECT THERETO AND HAVING A FREQUENCY RESPONSE CHARACTERISTIC VARYING WITH THE ORIENTATION OF A GIVEN AXIS OF SAID ELEMENT WITH RESPECT TO THE DIRECTION OF SAID MAGNETIC FIELD, AND MEANS TO DETECT THE RESPONSE OF SAID ELEMENT TO SAID MAGNETIC FIELD.
Claim 2
Independent Claim
135 words
A DEVICE FOR MEASURING ROTATION COMPRISING A TRUNCATED SPHERICAL SHELL OF SUPERCONDUCTIVE MATERIAL, MEANS TO PRODUCE A CURRENT FLOW IN A FIXED PLANE IN SAID SUPERCONDUCTIVE MATERIAL TO PROVIDE A MAGNETIC FIELD HAVING A GIVEN ORIENTATION IN INERTIAL SPACE, MEANS TO REDUCE THE TEMPERATURE OF SAID SHELL TO THE SUPERCONDUCTIVE STATE WHEREBY SAID CURRENT FLOW AND SAID MAGNETIC FIELD ARE MAINTAINED IN A LOSSLESS CONDITION AFTER SAID MEANS TO PRODUCE SAID CURRENT FLOW IS SWITCHED OFF, AN ANISOTROPIC PARAMAGNETIC ELEMENT MOUNTED TO SAID SHELL AND DISPOSED IN SAID MAGNETIC FIELD FOR FREE ROTATION WITH RESPECT THERETO AND HAVING A FREQUENCY RESPONSE CHARACTERISTIC VARYING WITH THE ORIENTATION OF A GIVEN AXIS OF SAID ELEMENT WITH RESPECT TO THE DIRECTION OF SAID MAGNETIC FIELD, AND MEANS TO DETECT THE RESPONSE OF SAID ELEMENT TO SAID MAGNETIC FIELD.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |