US3582928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impending failure indication device for bearings
Assignee: Individual
•
Filing: 1969-07-16
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Granted: 1971-06-01
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Expires: 1989-07-16
Abstract
Abstract An engine-bearing monitoring device having a pair of thermocouples connected across the bearing and a comparator connected to the thermocouples through amplifiers for measuring the temperature differential across the bearing. A threshold control is connected to the comparator and indicators in turn are connected to the control which indicators are operated upon the temperature differential reaching a threshold amount whereby to indicate that the bearing is not operating normally or being lubricated properly and that complete failure thereof is impending. The tachometer generator of the engine is connected to the threshold control to vary the threshold in accordance with the speed of the engine shaft.
Inventors
- 👤 Robert M Gaertner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/20; F; F01; F01D; F01D25/00; F01D25/18; F01D25/20; F02; F02C; F02C7/00; F02C7/06; F16; F16C; F16C19/00; F16C19/52; F16C19/525; F16N; F16N29/00; F16N29/04; G01; G01K; G01K7/00; G01K7/02; G01K7/021; G01M; G01M13/00; G01M13/04; F05; F05D; F05D2240/00; F05D2240/50; F05D2260/00; F05D2260/80; F05D2260/98; F05D2270/00; F05D2270/80; F16C2233/00; F16C2360/00; F16C2360/23; F16N2210/00; F16N2210/02; F16N2210/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
In combination with apparatus having a rotatable member and a bearing receiving the member and giving support thereto, a device comprising: means connected across the bearing at two places and responsive to a difference in temperature between the two places during rotation of said member which is effective to send out an electrical current having a voltage which increases as the difference in temperature across the bearing between the two places increases for any reason during rotation of said member and utilization means electrically connected to the temperatureresponsive means for receiving said current, said utilization means including means for compensating for variations in temperature caused by a change in the rotational speed of the rotatable member.
Claim 2
Dependent Claim
116 words
In combination with apparatus having a rotatable member and a bearing receiving the member and giving support thereto, a device comprising: means connected across the bearing at two places and responsive to a difference in temperature between the two places during rotation of said member which is effective to send out an electrical current having a voltage which increases as the difference in temperature across the bearing between the two places increases for any reason during rotation of said member and utilization means electrically connected to the temperatureresponsive means for receiving said current, said utilization means including means for compensating for variations in temperature caused by a change in the rotational speed of the rotatable member.
Claim 3
Dependent Claim
13 words
The subject matter of claim 1 wherein said utilization means comprises indicator means.
Claim 4
Dependent Claim
61 words
The subject matter of claim 1 wherein said temperature-responsive means comprises: a pair of thermocouples connected to said apparatus at said two places; and voltage comparator means to which the thermocouples are connected effective to send out to the utilization means said current having a voltage proportional to the difference between the voltages coming into the comparator means from the thermocouples.
Claim 5
Dependent Claim
68 words
The subject matter of claim 1 in which the beariNg is a rolling-type bearing, said apparatus including lubrication means for the bearing comprising: passage means for the supply of fluid lubricant under pressure into the working parts of the bearing; and one of said two places being along said passage means for exposure of the temperature-responsive means to the heat of the lubricant flowing through said passage means.
Claim 6
Dependent Claim
90 words
The subject matter of claim 1 in which the bearing is a rolling-type bearing, said apparatus including lubrication means for the bearing comprising: first passage means for the supply of fluid lubricant under pressure into the working parts of the bearing; second passage means for conducting the lubricant away after it has passed through the bearing; and said two places being along said first and second passage means, respectively, for exposure of the temperature-responsive means to the heat of the lubricant flowing through said first and second passage means, respectively.
Claim 7
Dependent Claim
112 words
The subject matter of claim 1 wherein said compensation means comprises: threshold means for sending out an electrical current therefrom only upon its receiving from said temperature-responsive means a current having a voltage which has reached a predetermined amount higher than a normal voltage for a particular rotational speed of said member indicative of the bearing producing an abnormal amount of heat, and additional means operatively connected to said member and electrically connected to the threshold means for so electrically biasing the latter when there are changes of the rotational speed of said member as to automatically adjust the threshold voltage of the threshold means for the different speeds of said member.
Claim 8
Dependent Claim
29 words
The subject matter of claim 6, said utilization means including warning indicator means connected to the threshold means for receiving the electrical current sent out from the latter means.
Claim 9
Dependent Claim
88 words
The subject matter of claim 7, said utilization means including warning indicator means connected to the threshold means for receiving the electrical current sent out from the latter means, the bearing being a rolling-type bearing, said apparatus including lubrication means for the bearing comprising passage means for the supply of fluid lubricant under pressure into the working parts of the bearing, one of said two places being along said passage means for exposure of the temperature-responsive means to the heat of the lubricant flowing through said passage means.
Claim 10
Dependent Claim
49 words
The subject matter of claim 8, said device being in combination with an aircraft having a cockpit for at least a pilot and an engine with a shaft, said apparatus being the engine and said member thereof being the shaft, said warning indicator means being located in the cockpit.
References Cited (Backward Citations)
US2399036A
Cited
US3487467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |