Patent US4400981A successfully refreshed from Google Patents.
US4400981A
Expired / Lapsed
US
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Method and apparatus for detecting abnormal conditions of switch gears
Assignee: Toshiba Corp
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Filing: 1981-10-28
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Granted: 1983-08-30
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Expires: 2001-10-28
Abstract
Abstract A method and apparatus for detecting an abnormal condition of a switch gear device including a switch gear, for instance a circuit breaker driven by an operating device. A device for detecting the operating force applied from the operating device to the circuit breaker is mounted between the operating device and the circuit breaker. Data is obtained from the detecting device, expanded in time for analysis, and compared with data obtained under a normal state to judge the presence or absence of an abnormal condition within the switch gear.
Inventors
- 👤 Akira Aoyagi
- 👤 Kazuomi Sakata
- 👤 Shinichi Ikeda
- 👤 Mashiro Koyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:45
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/0062; G; G01; G01L; G01L5/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
97 words
A method of detecting an abnormal condition of a switch gear device operated by means of an actuating device, comprising: connecting a means for detecting force to a portion between the switch gear device and the actuating device; driving a movable portion of the switch gear device by the actuating device; concurrently detecting the driving force and providing an output from the detecting means indicative of the detected force; recording the measured output from the detecting means; and comparing the recorded detected output from the detecting means with a recorded output obtained in a normal operating state.
Claim 2
Independent Claim
97 words
A method of detecting an abnormal condition of a switch gear device operated by means of an actuating device, comprising: connecting a means for detecting force to a portion between the switch gear device and the actuating device; driving a movable portion of the switch gear device by the actuating device; concurrently detecting the driving force and providing an output from the detecting means indicative of the detected force; recording the measured output from the detecting means; and comparing the recorded detected output from the detecting means with a recorded output obtained in a normal operating state.
Claim 3
Dependent Claim
23 words
A method as recited in claim 1, wherein said step of comparing includes: varying the read out time of the recorded measured output.
Claim 4
Dependent Claim
17 words
The method as recited in claim 2 further comprising: using a strain gauge as the detecting means.
Claim 5
Dependent Claim
15 words
The method as recited in claim 1, further comprising: said detecting and recording performed concurrently.
Claim 6
Independent Claim
112 words
A method of detecting an abnormal condition of a switch gear device normally operated at a high speed by an actuating device, comprising: connecting a detecting means for measuring force to a portion between the switch gear and the actuating device; driving the switch gear device at a normal high speed; measuring a plurality of data relating to operating force during normal high speed driving; driving the switch gear device at a lower than normal speed; concurrently measuring a plurality of examination data relating to the operating force at the time of said low speed driving; and comparing measured examination data obtained during said steps of normal speed and lower speed driving.
Claim 7
Independent Claim
112 words
A method of detecting an abnormal condition of a switch gear device normally operated at a high speed by an actuating device, comprising: connecting a detecting means for measuring force to a portion between the switch gear and the actuating device; driving the switch gear device at a normal high speed; measuring a plurality of data relating to operating force during normal high speed driving; driving the switch gear device at a lower than normal speed; concurrently measuring a plurality of examination data relating to the operating force at the time of said low speed driving; and comparing measured examination data obtained during said steps of normal speed and lower speed driving.
Claim 8
Independent Claim
118 words
An apparatus for detecting an abnormal condition of a switch gear device including a movable contact contained in a sealed casing filled with insulating gas and driven by an actuating mechanism for actuating the movable contact with a predetermined drive force, said apparatus comprising: a detecting unit mounted between the movable contact and the actuating mechanism for detecting and measuring drive force; recording means coupled to said detecting unit for recording an output, indicative of drive force, of said detecting unit upon actuation of said switch gear by said actuating mechanism; said recording means including means for reading out data at a slow speed; and displaying means coupled to said recording means for displaying recorded data for analysis.
Claim 9
Independent Claim
118 words
An apparatus for detecting an abnormal condition of a switch gear device including a movable contact contained in a sealed casing filled with insulating gas and driven by an actuating mechanism for actuating the movable contact with a predetermined drive force, said apparatus comprising: a detecting unit mounted between the movable contact and the actuating mechanism for detecting and measuring drive force; recording means coupled to said detecting unit for recording an output, indicative of drive force, of said detecting unit upon actuation of said switch gear by said actuating mechanism; said recording means including means for reading out data at a slow speed; and displaying means coupled to said recording means for displaying recorded data for analysis.
Claim 10
Independent Claim
100 words
An apparatus for detecting an abnormal condition of a switch gear device including a movable contact contained in a sealed casing and driven by an actuating mechanism for actuating the movable contact at a normal speed, said apparatus comprising: a detecting unit mounted between the movable contact and the actuating mechanism for detecting and measuring drive force; auxiliary driving means coupled to said movable contact for driving said movable contact at a speed lower than said normal speed; and displaying means coupled to said detecting unit for displaying an output indicative of drive force from the detecting unit for analysis.
Claim 11
Independent Claim
100 words
An apparatus for detecting an abnormal condition of a switch gear device including a movable contact contained in a sealed casing and driven by an actuating mechanism for actuating the movable contact at a normal speed, said apparatus comprising: a detecting unit mounted between the movable contact and the actuating mechanism for detecting and measuring drive force; auxiliary driving means coupled to said movable contact for driving said movable contact at a speed lower than said normal speed; and displaying means coupled to said detecting unit for displaying an output indicative of drive force from the detecting unit for analysis.
Claim 12
Independent Claim
19 words
An apparatus according to claims 6 or 7, wherein the detecting unit is detachable from the switch gear device.
Claim 13
Independent Claim
19 words
An apparatus according to claims 6 or 7, wherein the detecting unit is mounted outside of the sealed casing.
Claim 14
Dependent Claim
16 words
An apparatus according to claim 6 or 7, wherein the detecting unit includes a strain gauge.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |