Patent US3886916A successfully refreshed from Google Patents.
US3886916A
Expired / Lapsed
US
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Timing mechanism for breakerless ignition systems
Assignee: Colt Industries Operating Corp
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Filing: 1973-08-20
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Granted: 1975-06-03
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Expires: 1993-08-20
Abstract
Abstract In an ignition system for use with spark ignited engines, a timing mechanism for manually advancing or retarding the firing point of the cylinders in the engine.
Inventors
- 👤 Robert Mcdougall Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:25
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/02; F02P5/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
A timing mechanism for a breakerless ignition system, comprising, in combination, a rotor, means for providing a magnetic flux field, a flux responsive means including a triggering coil, a triggering core for the coil, a mechanically adjustable element movable to a selected angular position relative to said triggering core, magnetic pole piece means mounted with said element, said pole piece means including a flux conductor section and a pole shoe section, said rotor including a discrete triggering point on its periphery, said rotor moving past the flux conductor section and thereby developing a triggering signal, the manually adjustable element being movable to move the pole piece means, and said pole piece means when moved being effective to change the point at which triggering occurs, while still maintaining a section of the pole shoe adjacent said triggering core so as to develop a trigger voltage of a selected amplitude.
Claim 2
Dependent Claim
148 words
A timing mechanism for a breakerless ignition system, comprising, in combination, a rotor, means for providing a magnetic flux field, a flux responsive means including a triggering coil, a triggering core for the coil, a mechanically adjustable element movable to a selected angular position relative to said triggering core, magnetic pole piece means mounted with said element, said pole piece means including a flux conductor section and a pole shoe section, said rotor including a discrete triggering point on its periphery, said rotor moving past the flux conductor section and thereby developing a triggering signal, the manually adjustable element being movable to move the pole piece means, and said pole piece means when moved being effective to change the point at which triggering occurs, while still maintaining a section of the pole shoe adjacent said triggering core so as to develop a trigger voltage of a selected amplitude.
Claim 3
Dependent Claim
148 words
A timing mechanism for a breakerless ignition system, comprising, in combination, a rotor, means for providing a magnetic flux field, a flux responsive means including a triggering coil, a triggering core for the coil, a mechanically adjustable element movable to a selected angular position relative to said triggering core, magnetic pole piece means mounted with said element, said pole piece means including a flux conductor section and a pole shoe section, said rotor including a discrete triggering point on its periphery, said rotor moving past the flux conductor section and thereby developing a triggering signal, the manually adjustable element being movable to move the pole piece means, and said pole piece means when moved being effective to change the point at which triggering occurs, while still maintaining a section of the pole shoe adjacent said triggering core so as to develop a trigger voltage of a selected amplitude.
Claim 4
Dependent Claim
148 words
A timing mechanism for a breakerless ignition system, comprising, in combination, a rotor, means for providing a magnetic flux field, a flux responsive means including a triggering coil, a triggering core for the coil, a mechanically adjustable element movable to a selected angular position relative to said triggering core, magnetic pole piece means mounted with said element, said pole piece means including a flux conductor section and a pole shoe section, said rotor including a discrete triggering point on its periphery, said rotor moving past the flux conductor section and thereby developing a triggering signal, the manually adjustable element being movable to move the pole piece means, and said pole piece means when moved being effective to change the point at which triggering occurs, while still maintaining a section of the pole shoe adjacent said triggering core so as to develop a trigger voltage of a selected amplitude.
Claim 5
Dependent Claim
40 words
A timing mechanism as in claim 1 wherein said adjustable element comprises a ring mounted intermediate said triggering core for the coil and the rotor, and wherein flexing of the electrical wires connected such as to the coil is eliminated.
Claim 6
Dependent Claim
27 words
A timing mechanism as in claim 1 wherein said adjustable element comprises a timimg ring of a non-magnetic material and the pole piece means are embedded therein.
Claim 7
Dependent Claim
45 words
A timing mechanism as in claim 1 wherein said pole piece means are arranged such that relative movement thereof changes the effective air gap between the rotor and the trigger core for the coil as a function of the angular position of said adjustable element.
Claim 8
Dependent Claim
49 words
A mechanism as in claim 1 wherein said means for changing said triggering point comprise an arcuate pole shoe having a portion defining a variable air gap between the rotor and said shoe, and said mechanism means for moving said pole piece relative to the periphery of said rotor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |