US3941112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition device for internal combustion engines
Assignee: Ducellier et Cie
•
Filing: 1974-06-19
•
Granted: 1976-03-02
•
Expires: 1994-06-19
Abstract
Abstract An ignition device for an internal combustion engine of the kind having an ignition coil comprising a primary winding and a secondary winding, a current limiting resistance connected in series with the primary winding and a contact breaker, wherein there is provided means which shunt said current limiting resistance for a predetermined time at each closure of the contacts of said contact breaker.
Inventors
- 👤 Roger Jean Habert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:08
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/045; F02P3/0453; F02P15/00; F02P15/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
An ignition device for an internal combustion engine comprising: a contact breaker; an ignition coil having a low voltage primary winding adapted to be connected to an electrical battery through said contact breaker; and a high voltage secondary winding adapted to be connected consecutively to engine spark plugs through a distributor; a current limiting resistance connected in series with said primary winding; and electronic means connected in parallel with said resistance for shunting out said resistance for a specific predetermined time interval of the total time of closure of said contact breaker, independently of ambient temperature and engine speed.
Claim 2
Dependent Claim
99 words
An ignition device for an internal combustion engine comprising: a contact breaker; an ignition coil having a low voltage primary winding adapted to be connected to an electrical battery through said contact breaker; and a high voltage secondary winding adapted to be connected consecutively to engine spark plugs through a distributor; a current limiting resistance connected in series with said primary winding; and electronic means connected in parallel with said resistance for shunting out said resistance for a specific predetermined time interval of the total time of closure of said contact breaker, independently of ambient temperature and engine speed.
Claim 3
Dependent Claim
42 words
An ignition device as claimed in claim 1 wherein said electronic shunting means consists of a timing circuit and a switching mechanism and is adapted to shunt-out said current-limiting resistance for a predetermined period of time following closing of said contact breaker.
Claim 4
Dependent Claim
46 words
An ignition device as claimed in claim 2 wherein said shunting means comprises a diode connected in parallel with said current-limiting resistor, and a network also connected in parallel with said current-limiting resistor, said network consisting of at least one transistor and at least one resistor.
Claim 5
Dependent Claim
27 words
An ignition device as claimed in claim 2 comprising a housing secured to a metallic fixing collar provided on said ignition coil for said electronic shunting means.
Claim 6
Dependent Claim
19 words
An ignition device as claimed in claim 1 comprising a temperature responsive resistance in series with said current-limiting resistance.
References Cited (Backward Citations)
US1469582A
Cited
US1482080A
Cited
US2159968A
Cited
US2223151A
Cited
US3047728A
Cited
US3324351A
Cited
US3718124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |