Patent US3877453A successfully refreshed from Google Patents.
US3877453A
Expired / Lapsed
US
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Ignition system for internal combustion engines
Assignee: BBC Brown Boveri AG Germany
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Filing: 1973-01-19
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Granted: 1975-04-15
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Expires: 1993-01-19
Abstract
Abstract The primary winding of the ignition system includes two serially connected sections which are energized sequentially and form an effective means for storing energy in magnetic form.
Inventors
- 👤 Heinrich-Josef Brungsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:57
CPC Classifications
F; F02; F02P; F02P3/00; F02P3/02; F02P3/04; F02P3/05; F02P3/051; F02P3/0407; F02P3/0435
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
An ignition system for internal combustion engines comprising a. means forming a high-voltage circuitry including spark plug means (9) and a secondary winding (5); b. means forming a low voltage circuitry including a primary winding (6) inductively coupled with said secondary winding (5), said primary winding (6) having a first small resistance section (3) allowing rapid build-up of current therein and a second high resistance section (4) serially connected with said first section (3); c. switching means (1) for initially connecting said first section (3) and said second section (4) serially to said d-c power source; d. a shunt-circuit by-passing said second section (4) to allow energization by said d-c power source (10) of said first section (3) only, said shunt-circuit including a transistor (12) for controlling the flow of current therein; e. a tertiary winding (11) inductively coupled with said primary winding (6) and providing the control current for said transistor (12); and f. a diode (8) arranged to preclude current flow in said second section (4) while said first section (3) is energized by a current flowing through said transistor(12).
Claim 2
Dependent Claim
182 words
An ignition system for internal combustion engines comprising a. means forming a high-voltage circuitry including spark plug means (9) and a secondary winding (5); b. means forming a low voltage circuitry including a primary winding (6) inductively coupled with said secondary winding (5), said primary winding (6) having a first small resistance section (3) allowing rapid build-up of current therein and a second high resistance section (4) serially connected with said first section (3); c. switching means (1) for initially connecting said first section (3) and said second section (4) serially to said d-c power source; d. a shunt-circuit by-passing said second section (4) to allow energization by said d-c power source (10) of said first section (3) only, said shunt-circuit including a transistor (12) for controlling the flow of current therein; e. a tertiary winding (11) inductively coupled with said primary winding (6) and providing the control current for said transistor (12); and f. a diode (8) arranged to preclude current flow in said second section (4) while said first section (3) is energized by a current flowing through said transistor(12).
Claim 3
Dependent Claim
34 words
An ignition system as specified in claim 1 wherein said switching means for initially serially connecting said first section (3) and said second section (4) to said d-c power supply include a second transistor(14).
Claim 4
Dependent Claim
38 words
An ignition system as specified in claim 2 wherein a Resistor and a Zener diode are connected in series with said second transistor, and said first section (3) and said second section (4) of said primary winding (6).
Claim 5
Dependent Claim
67 words
An ignition system as specified in claim 1 wherein said primary winding (6) has a tap arranged between said first section (3) and said second section (4) thereof, wherein the emitter of said transistor (12) and one end of said tertiary winding (11) are connected to said tap, and wherein the other end of said tertiary winding (11) is connected to the base of said transistor (12).
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |