Patent US3697982A successfully refreshed from Google Patents.
US3175149A
Expired / Lapsed
US
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Ignition tester comprising cathode ray tube and means responsive to spark plug leakage current to vary beam intensity
Assignee: Motors Liquidation Co
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Filing: 1959-10-05
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Granted: 1965-03-23
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Expires: 1979-10-05
Abstract
No abstract record available.
Inventors
- 👤 John A Whaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:37
CPC Classifications
F; F02; F02P; F02P17/00; F02P17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN AN APPARATUS FOR TESTING SPARK PLUGS IN AN ENGINE HAVING AN IGNITION SYSTEM WITH A HIGH VOLTAGE SECONDARY CIRCUIT CONNECTED TO A PLURALITY OF INDIVIDUAL SPARK PLUGS HAVING SPARK GAP ELECTRODES, THE COMBINATION INCLUDING A CATHODE RAY TUBE HAVING A CATHODE ELECTRODE, A CONTROL ELECTRODE AND AN ACCELERATING ULTOR, POWER SUPPLY MEANS CONNECTED WITH THE CATHODE AN ULTOR FOR DEVELOPING A SCANNING BEAM IN SAID TUBE, BIAS MEANS CONNECTED WITH THE POWER SUPPLY MEANS AND WITH ONE OF SAID ELECTRODES FOR CONTROLLING THE INTENSITY OF SAID SCANNING BEAM, FIRST MEANS FOR DEFLECTING SAID BEAM IN ONE DIRECTION IN RESPONSE TO THE VOLTAGE IN SAID SECONDARY CIRCUIT REQUIRED TO FIRE EACH SPARK PLUG, SECOND MEANS FOR DEFLECTING SAID
Claim 2
Dependent Claim
118 words
IN AN APPARATUS FOR TESTING SPARK PLUGS IN AN ENGINE HAVING AN IGNITION SYSTEM WITH A HIGH VOLTAGE SECONDARY CIRCUIT CONNECTED TO A PLURALITY OF INDIVIDUAL SPARK PLUGS HAVING SPARK GAP ELECTRODES, THE COMBINATION INCLUDING A CATHODE RAY TUBE HAVING A CATHODE ELECTRODE, A CONTROL ELECTRODE AND AN ACCELERATING ULTOR, POWER SUPPLY MEANS CONNECTED WITH THE CATHODE AN ULTOR FOR DEVELOPING A SCANNING BEAM IN SAID TUBE, BIAS MEANS CONNECTED WITH THE POWER SUPPLY MEANS AND WITH ONE OF SAID ELECTRODES FOR CONTROLLING THE INTENSITY OF SAID SCANNING BEAM, FIRST MEANS FOR DEFLECTING SAID BEAM IN ONE DIRECTION IN RESPONSE TO THE VOLTAGE IN SAID SECONDARY CIRCUIT REQUIRED TO FIRE EACH SPARK PLUG, SECOND MEANS FOR DEFLECTING SAID
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |