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US3176286A
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Apparatus for monitoring bearings
Assignee: BBC Brown Boveri AG Germany
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Filing: 1963-05-17
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Granted: 1965-03-30
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Expires: 1983-05-17
Abstract
No abstract record available.
Inventors
- 👤 Dschen Yuan-Heng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
G; G21; G21D; G21D1/00; G21D1/02; F; F01; F01D; F01D21/00; F01D21/04; F16; F16C; F16C17/00; F16C17/12; F16C17/24; G01; G01B; G01B7/00; G01B7/14; G01B7/144; G01M; G01M13/00; G01M13/04; F16C2233/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
APPARATUS FOR MONITORING BEARINGS TO DETECT ANY METALLIC CONTACT BETWEEN A ROTATABLE ELECTRICALLY CONDUCTIVE SHAFT AND THE BEARING WHICH NORMALLY SUPPORTS SAID SHAFT WITH A NON-CONDUCTIVE FILM OF LUBRICANT THEREBETWEEN WHICH COMPRISES AT LEAST TWO CAPACITORS CONNECTED IN SERIES AND A CAPACITANCE CHANGE DETECTOR ELECTRICALLY CONNECTED ACROSS SAID SERIES CONNECTED CAPACITORS, EACH SAID CAPACITOR INCLUDING AS ONE ELEMENT THEREOF A PERIPHERAL PORTION OF SAID ELECTRICALLY CONDUCTIVE SHAFT WHICH THEREBY ELECTRICALLY INTERCONNECTS SAID PERIPHERAL PORTIONS AND WHICH ARE AXIALLY SPACED FROM EACH OTHER, AND THE OTHER ELEMENT OF AT LEAST ONE OF SAID CAPACITORS BEING THE INTERNAL PERIPHERY OF SAID BEARING WHICH IS ALSO ELECTRICALLY CONDUCTIVE, WHEREBY ANY METALLIC CONTACT BETWEEN SAID PERIPHERAL PORTIONS OF SAID BEARING AND SHAFT RESULTS IN A SHORT-CIRCUIT OF THE CAPACITOR ESTABLISHED BY SAID PERIPHERAL PORTIONS AND A SUBSTANTIAL DECREASE IN THE TOTAL CAPACITANCE ACROSS SAID SERIES CONNECTED CAPACITORS AS MEASURED BY SAID DETECTOR.
Claim 2
Dependent Claim
148 words
APPARATUS FOR MONITORING BEARINGS TO DETECT ANY METALLIC CONTACT BETWEEN A ROTATABLE ELECTRICALLY CONDUCTIVE SHAFT AND THE BEARING WHICH NORMALLY SUPPORTS SAID SHAFT WITH A NON-CONDUCTIVE FILM OF LUBRICANT THEREBETWEEN WHICH COMPRISES AT LEAST TWO CAPACITORS CONNECTED IN SERIES AND A CAPACITANCE CHANGE DETECTOR ELECTRICALLY CONNECTED ACROSS SAID SERIES CONNECTED CAPACITORS, EACH SAID CAPACITOR INCLUDING AS ONE ELEMENT THEREOF A PERIPHERAL PORTION OF SAID ELECTRICALLY CONDUCTIVE SHAFT WHICH THEREBY ELECTRICALLY INTERCONNECTS SAID PERIPHERAL PORTIONS AND WHICH ARE AXIALLY SPACED FROM EACH OTHER, AND THE OTHER ELEMENT OF AT LEAST ONE OF SAID CAPACITORS BEING THE INTERNAL PERIPHERY OF SAID BEARING WHICH IS ALSO ELECTRICALLY CONDUCTIVE, WHEREBY ANY METALLIC CONTACT BETWEEN SAID PERIPHERAL PORTIONS OF SAID BEARING AND SHAFT RESULTS IN A SHORT-CIRCUIT OF THE CAPACITOR ESTABLISHED BY SAID PERIPHERAL PORTIONS AND A SUBSTANTIAL DECREASE IN THE TOTAL CAPACITANCE ACROSS SAID SERIES CONNECTED CAPACITORS AS MEASURED BY SAID DETECTOR.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |