US3718124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum actuated ignition spark energy level control circuit
Assignee: Motors Liquidation Co
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Filing: 1971-10-04
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Granted: 1973-02-27
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Expires: 1991-10-04
Abstract
Abstract A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration. The stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, of an electrical switch are connected across at least a portion of the ballast resistance connected in series with the ignition coil primary winding while the engine is in the running mode. A pressure responsive electrical switch operating device, in communication with the intake manifold of the associated internal combustion engine, is operatively connected to the movable contact of the electrical switch for operating the movable contact to the electrical circuit closed condition upon engine deceleration to reduce the value of ballast resistance connected in series with the ignition coil primary winding.
Inventors
- 👤 H Burley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:02
CPC Classifications
F; F02; F02P; F02P9/00; F02P9/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration comprising in combination with an internal combustion engine having an intake manifold in which the pressure decreases upon engine deceleration and an ignition system of the type having a ballast resistance connected in series with the primary winding of the ignition coil across a direct current potential source while the engine is in the running mode, an electrical Switch having a stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, connected across at least a portion of said ballast resistance, and a pressure responsive electrical switch operating means in communication with said intake manifold and operatively connected to said movable contact of said electrical switch for operating said movable contact to the electrical circuit closed condition upon engine deceleration.
Claim 2
Dependent Claim
144 words
A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration comprising in combination with an internal combustion engine having an intake manifold in which the pressure decreases upon engine deceleration and an ignition system of the type having a ballast resistance connected in series with the primary winding of the ignition coil across a direct current potential source while the engine is in the running mode, an electrical Switch having a stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, connected across at least a portion of said ballast resistance, and a pressure responsive electrical switch operating means in communication with said intake manifold and operatively connected to said movable contact of said electrical switch for operating said movable contact to the electrical circuit closed condition upon engine deceleration.
Claim 3
Dependent Claim
159 words
A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration comprising in combination with an internal combustion engine having an intake manifold in which the pressure decreases upon engine deceleration and an ignition system of the type having a ballast resistance connected in series with the primary winding of the ignition coil across a direct current potential source while the engine is in the running mode, a resistor, an electrical switch having a stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, means for connecting said resistor and said stationary contact and said movable contact of said electrical switch in series across said ballast resistance, and a pressure responsive electrical switch operating means in communication with said intake manifold and operatively connected to said movable contact of said electrical switch for operating said movable contact to the electrical circuit closed condition upon engine deceleration.
Claim 4
Dependent Claim
159 words
A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration comprising in combination with an internal combustion engine having an intake manifold in which the pressure decreases upon engine deceleration and an ignition system of the type having a ballast resistance connected in series with the primary winding of the ignition coil across a direct current potential source while the engine is in the running mode, a resistor, an electrical switch having a stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, means for connecting said resistor and said stationary contact and said movable contact of said electrical switch in series across said ballast resistance, and a pressure responsive electrical switch operating means in communication with said intake manifold and operatively connected to said movable contact of said electrical switch for operating said movable contact to the electrical circuit closed condition upon engine deceleration.
Claim 5
Dependent Claim
141 words
A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration comprising in combination with an internal combustion engine having an intake manifold in which the pressure decreases upon engine deceleration and an ignition system of the type having two ballast resistors connected in series with the primary winding of the ignition coil across a direct current potential source while the engine is in the running mode, an electrical switch having a stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, connected across one of said ballast resistors, and a pressure responsive electrical switch operating means in communication with said intake manifold and operatively connected to said movable contact of said electrical switch for operating said movable contact to the electrical circuit closed condition upon engine deceleration.
Claim 6
Dependent Claim
141 words
A vacuum actuated ignition spark energy level control circuit for increasing the ignition spark energy level upon engine deceleration comprising in combination with an internal combustion engine having an intake manifold in which the pressure decreases upon engine deceleration and an ignition system of the type having two ballast resistors connected in series with the primary winding of the ignition coil across a direct current potential source while the engine is in the running mode, an electrical switch having a stationary contact and a normally open movable contact, operable to an electrical circuit closed condition, connected across one of said ballast resistors, and a pressure responsive electrical switch operating means in communication with said intake manifold and operatively connected to said movable contact of said electrical switch for operating said movable contact to the electrical circuit closed condition upon engine deceleration.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |