US3297009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contactless ignition devices
Assignee: Hitachi Ltd
•
Filing: 1964-07-08
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Granted: 1967-01-10
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Expires: 1984-07-08
Abstract
No abstract record available.
Inventors
- 👤 Sasaki Toshiyuki
- 👤 Takakura Yoshisada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:27
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P7/00; F02P7/06; F02P7/067; F02P7/07; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A CONTACTLESS IGNITION DEVICE ADAPTED FOR AUTOMOTIVE VEHICLESD AND THE LIKE COMPRISING IGNITING POSITION DETECTING MEANS INCLUDING A HALL ELEMENT HAVING INPUT TERMINALS AND OUTPUT TERMINALS AND DISPOSED IN A MAGNETIC FIELD PRODUCED IN SYNCHRONISM WITH THE REVOLUTION OF THE ENGINE, THE DENSITY OF THE MAGNETIC FLUX PRODUCING SAID MAGNETIC FIELD BEING VARIABLE AT THE FRINGES THEREOF FOR VARYING THE IGNITING POSITION OF THE ENGINE, MEANS FOR APPLYING AN ADJUSTABLE CONTROL CURRENT TO THE INPUT TERMINALS OF THE HALL ELEMENT AN IGNITING SEMI-CONDUCTOR, AN IGNITION COIL ENERGIZED BY SAID IGNITING SEMI-CONDUCTOR, AND IGNITION CONTROL MEANS OPERATIVELY COUPLED TO THE OUTPUT TERMINALS OF SAID HALL ELEMENT AND TO THE INPUT OF THE IGNITING SEMI-CONDUCTOR FOR CONTROLLING CONDUCTION THROUGH SAID IGNITING SEMI-CONDUCTOR TO THEREBY CONTROL THE TIME OF PRODUCTION OF AN IGNITION SPARK BY SAID IGNITION COIL.
Claim 2
Dependent Claim
135 words
A CONTACTLESS IGNITION DEVICE ADAPTED FOR AUTOMOTIVE VEHICLESD AND THE LIKE COMPRISING IGNITING POSITION DETECTING MEANS INCLUDING A HALL ELEMENT HAVING INPUT TERMINALS AND OUTPUT TERMINALS AND DISPOSED IN A MAGNETIC FIELD PRODUCED IN SYNCHRONISM WITH THE REVOLUTION OF THE ENGINE, THE DENSITY OF THE MAGNETIC FLUX PRODUCING SAID MAGNETIC FIELD BEING VARIABLE AT THE FRINGES THEREOF FOR VARYING THE IGNITING POSITION OF THE ENGINE, MEANS FOR APPLYING AN ADJUSTABLE CONTROL CURRENT TO THE INPUT TERMINALS OF THE HALL ELEMENT AN IGNITING SEMI-CONDUCTOR, AN IGNITION COIL ENERGIZED BY SAID IGNITING SEMI-CONDUCTOR, AND IGNITION CONTROL MEANS OPERATIVELY COUPLED TO THE OUTPUT TERMINALS OF SAID HALL ELEMENT AND TO THE INPUT OF THE IGNITING SEMI-CONDUCTOR FOR CONTROLLING CONDUCTION THROUGH SAID IGNITING SEMI-CONDUCTOR TO THEREBY CONTROL THE TIME OF PRODUCTION OF AN IGNITION SPARK BY SAID IGNITION COIL.
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |