US3588608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit protection apparatus for disabling high voltage to a cathode-ray tube
Assignee: Sun Electric Corp
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Filing: 1969-02-24
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Granted: 1971-06-28
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Expires: 1989-02-24
Abstract
Abstract D R A W I N G THE CATHODE-RAY TUBE OF AN OSCILLOSCOPE CAN BE PROTECTED WHEN THE HORIZONTAL SWEEP GENERATOR THEREOF FAILS TO PRODUCE AN OUTPUT SIGNAL BY PROVIDING A CAPACITOR THAT IS PERIODICALLY DISCHARGED THROUGH A CONTROLLED RECTIFIER IN RESPONSE TO SIGNALS RECEIVED FROM THE HORIZONTAL SWEEP GENERATOR. IF THE HORIZONTAL SWEEP GENERATOR FAILS TO PRODUCE AN OUTPUT SIGNAL, THE CONTROLLED RECTIFIER IS NOT OPERATED AND THE CAPACITOR CHARGES TO A VOLTAGE SUFFICIENT TO ACTIVATE A SWITCH DEVICE. THE SWITCH DEVICE, IN TURN, DISABLES THE HIGH VOLTAGE POWER SUPPLY THAT OPERATES THE CATHODE-RAY TUBE.
Inventors
- 👤 Larry Wanschek
- 👤 Michael J Halinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:19
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/20
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 |