Patent US3598891A successfully refreshed from Google Patents.
Patent US3588658A successfully refreshed from Google Patents.
US3588658A
Expired / Lapsed
US
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Servo system having a monitor and trip level test means
Assignee: Bendix Corp
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Filing: 1968-12-23
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Granted: 1971-06-28
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Expires: 1988-12-23
Abstract
Abstract A CONDITION INDICATOR OPERATED BY A SERVO MEANS, HAVING A SERVOAMPLIFIER AND A MONITOR, INDICATES A SENSED CONDITION. THE MONITOR PROVIDES AN ALARM WHEN A SPECIFIED DIFFERENCE EXISTS BETWEEN THE SENSED CONDITION AND THE INDICATED CONDITION. A TEST MEANS SHORTS THE SERVO MEANS INPUT TO GROUND AND APPLIES A VOLTAGE TO THE SERVO MEANS TO OPERATE THE SERVO UNTIL THE MONITOR PROVIDES THE ALARM. THE MONITOR TRIP LEVEL CAN BE DETERMINED BY READING THE CHANGE IN READING OF THE INDICATOR DURING THE TEST.
Inventors
- 👤 Peter C Van Der Sluys
- 👤 George E Ellis
- 👤 Fred P Modrow
- 👤 Louis Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
G; G05; G05B; G05B23/00; G05B23/02; G05B23/0205; G05B23/0218; G05B23/0224; G05B23/0227; G05B23/0235; G05D; G05D3/00; G05D3/12; G05D3/121; G05D3/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |