US3127540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark ignition apparatus
Assignee: Lucas Support Services Ltd
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Filing: 1962-01-22
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Granted: 1964-03-31
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Collins Keith Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:53
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/001; F02P15/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
180 words
SPARK IGNITION APPARATUS COMPRISING IN COMBINATION A PAIR OF TRANSFORMERS HAVING PRIMARY AND SECONDARY WINDINGS, SWITCH MEANS IN CIRCUIT WITH THE PRIMARY WINDINGS AND MOVABLE BETWEEN A FIRST POSITION IN WHICH ONE OF THE PRIMARY WINDINGS IS ENERGISED, AND A SECOND POSITION IN WHICH BOTH PRIMARY WINDINGS ARE ENERGISED, MEANS FOR BREAKING THE CIRCUITS TO THE PRIMARY WINDINGS INTERMITTENTLY SO AS TO GENERATE A HIGH VOLTAGE IN THE SECONDARY WINDINGS, A PAIR OF CAPACITORS CONNECTED ACROSS THE SECONDARY WINDINGS THROUGH RECTIFIERS RESPECTIVELY, A PAIR OF CONTROL GAPS EACH HAVING TWO SPACED ELECTRODES CONNECTED ACROSS THE PAIR OF CAPACITORS RESPECTIVELY SO THAT THE CONTROL GAPS BREAK DOWN WHEN THE VOLTAGES ACROSS THE CAPACITORS REACH A PREDETERMINED VALUE, A PAIR OF CONDUCTIVE BANDS SURROUNDING THE CONTROL GAPS RESPECTIVELY AND CONNECTED TO AN ELECTRODE OF THE OTHER CONTROL GAP RESPECTIVELY, BREAKDOWN OF ONE CONTROL GAP APPLYING A BIAS TO THE BAND SURROUNDING THE OTHER CONTROL GAP TO REDUCE THE BREAKDOWN VOLTAGE THEREOF, AND A RETURN PATH FOR ELECTRICAL ENERGY PASSING THROUGH THE CONTROL GAPS, SAID RETURN PATH INCLUDING AT LEAST ONE SPARK GAP.
Claim 2
Dependent Claim
180 words
SPARK IGNITION APPARATUS COMPRISING IN COMBINATION A PAIR OF TRANSFORMERS HAVING PRIMARY AND SECONDARY WINDINGS, SWITCH MEANS IN CIRCUIT WITH THE PRIMARY WINDINGS AND MOVABLE BETWEEN A FIRST POSITION IN WHICH ONE OF THE PRIMARY WINDINGS IS ENERGISED, AND A SECOND POSITION IN WHICH BOTH PRIMARY WINDINGS ARE ENERGISED, MEANS FOR BREAKING THE CIRCUITS TO THE PRIMARY WINDINGS INTERMITTENTLY SO AS TO GENERATE A HIGH VOLTAGE IN THE SECONDARY WINDINGS, A PAIR OF CAPACITORS CONNECTED ACROSS THE SECONDARY WINDINGS THROUGH RECTIFIERS RESPECTIVELY, A PAIR OF CONTROL GAPS EACH HAVING TWO SPACED ELECTRODES CONNECTED ACROSS THE PAIR OF CAPACITORS RESPECTIVELY SO THAT THE CONTROL GAPS BREAK DOWN WHEN THE VOLTAGES ACROSS THE CAPACITORS REACH A PREDETERMINED VALUE, A PAIR OF CONDUCTIVE BANDS SURROUNDING THE CONTROL GAPS RESPECTIVELY AND CONNECTED TO AN ELECTRODE OF THE OTHER CONTROL GAP RESPECTIVELY, BREAKDOWN OF ONE CONTROL GAP APPLYING A BIAS TO THE BAND SURROUNDING THE OTHER CONTROL GAP TO REDUCE THE BREAKDOWN VOLTAGE THEREOF, AND A RETURN PATH FOR ELECTRICAL ENERGY PASSING THROUGH THE CONTROL GAPS, SAID RETURN PATH INCLUDING AT LEAST ONE SPARK GAP.
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) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |