US3600530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition distributor having a radio frequency interference shield
Assignee: Motors Liquidation Co
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Filing: 1969-09-17
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Granted: 1971-08-17
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Expires: 1989-09-17
Abstract
Abstract A radio frequency interference shield of an ignition distributor of the type having a fixed base and an adjustable breaker plate which is shifted by a vacuum unit relative to the base. The distributor is of the type wherein the centrifugal advance mechanism is disposed above the breaker can and located within a rotor assembly for the distributor. A radio frequency interference shield is provided which comprises a generally cupshaped metallic housing that is attached to the breaker plate of the distributor. The cup-shaped housing is formed of two complementary interfitting metallic parts which are attached to the breaker plate and which have matching semicircular openings that together form a circular opening disposed about a rotatable part of the distributor that drives the rotor. The two housing parts are secured to the breaker plate by screws and with the breaker plate form a closed housing except for the opening that receives a rotatable part of the distributor and an opening for adjusting the breaker contact set of the distributor. The compartment defined by the breaker plate and the two housing shield parts enclose the distributor breaker contacts, a capacitor, and the capacitor lead wire connecting the capacitor to one of the breaker contacts.
Inventors
- 👤 Charles L Dusenberry
- 👤 Donald G Guethersloh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:53
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/02; F02P7/021; F02P7/025; H; H04; H04B; H04B15/00; H04B15/02; H04B15/025
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
269 words
A shielded ignition distributor for an internal combustion engine comprising, a base, said base having a laterally extending support section, a distributor cap comprised of insulation material secured to said support section of said base extending axially therefrom, said distributor cap having a center electrode and a plurality of circumferentially spaced electrodes which are adapted to be connected with wires leading to spark plugs of an internal combustion engine, shaft means rotatably supported by said base extending into said cap, a metallic breaker plate supported by said base and adjustable relative thereto, a breaker cam driven by said shaft, rotor means driven by said shaft including conductive means operative to connect the center electrode and saId circumferentially spaced electrodes of said cap, breaker contacts supported from one wall of said breaker plate operated by said breaker cam, a capacitor supported from said one wall of said breaker plate including a capacitor lead wire connected to one of said breaker contacts, and a generally cup-shaped metallic radio interference shield supported by said breaker plate and defining with said breaker plate a substantially closed metallic housing containing said breaker contacts, said capacitor, said capacitor lead wire and said breaker cam, said metallic housing comprising first and second complementary metallic shield parts removably secured to said breaker plate by removable fastener means, said shield parts having overlapping edges which engage each other and having semicircular openings defining a central opening that receives said shaft means for driving said rotor of said distributor, said shield located within said distributor cap and having an outer wall spaced from the inner wall of said cap.
Claim 2
Dependent Claim
269 words
A shielded ignition distributor for an internal combustion engine comprising, a base, said base having a laterally extending support section, a distributor cap comprised of insulation material secured to said support section of said base extending axially therefrom, said distributor cap having a center electrode and a plurality of circumferentially spaced electrodes which are adapted to be connected with wires leading to spark plugs of an internal combustion engine, shaft means rotatably supported by said base extending into said cap, a metallic breaker plate supported by said base and adjustable relative thereto, a breaker cam driven by said shaft, rotor means driven by said shaft including conductive means operative to connect the center electrode and saId circumferentially spaced electrodes of said cap, breaker contacts supported from one wall of said breaker plate operated by said breaker cam, a capacitor supported from said one wall of said breaker plate including a capacitor lead wire connected to one of said breaker contacts, and a generally cup-shaped metallic radio interference shield supported by said breaker plate and defining with said breaker plate a substantially closed metallic housing containing said breaker contacts, said capacitor, said capacitor lead wire and said breaker cam, said metallic housing comprising first and second complementary metallic shield parts removably secured to said breaker plate by removable fastener means, said shield parts having overlapping edges which engage each other and having semicircular openings defining a central opening that receives said shaft means for driving said rotor of said distributor, said shield located within said distributor cap and having an outer wall spaced from the inner wall of said cap.
Claim 3
Dependent Claim
82 words
The ignition distributor according to claim 1 where said first and second metallic shield parts each have lower edges engaging the peripheral edge of said breaker plate, and wherein said first shield part has inwardly struck portions engaging the top surface of said breaker plate and wherein an edge of the second shield part overlaps a complementary edge of the first shield part and further wherein said shield parts are secured to said breaker plate by screws threaded into said breaker plate.
Claim 4
Dependent Claim
206 words
A shielded breaker plate and breaker contact assembly for an ignition distributor comprising, a laterally extending metallic breaker plate having an opening for receiving a distributor shaft, breaker contact means supported from one wall of said breaker plate, a capacitor supported from said one wall of said breaker plate, a capacitor lead wire connected to one breaker contact of said breaker contact means, and a generally cup-shaped metallic shield secured to said breaker plate having a central opening aligned with the opening in said breaker plate, said metallic shield comprised of first and second shield parts having overlapping engaging edges and having semicircular complementary openings defining said central opening in said shield, said first and second shield parts each having lower edges engaging the peripheral edge of said breaker plate and at least one of said shield parts having an inwardly struck portion engaging said one wall of said breaker plate, and removable fastener means for respectively removably securing said shield parts to said breaker plate, said shield and breaker plate defining a metallic enclosure containing said breaker contact means, said capacitor and said capacitor lead wire, said enclosure serving to reduce radiation of radio interference signals developed within said enclosure during use of said assembly.
Claim 5
Dependent Claim
206 words
A shielded breaker plate and breaker contact assembly for an ignition distributor comprising, a laterally extending metallic breaker plate having an opening for receiving a distributor shaft, breaker contact means supported from one wall of said breaker plate, a capacitor supported from said one wall of said breaker plate, a capacitor lead wire connected to one breaker contact of said breaker contact means, and a generally cup-shaped metallic shield secured to said breaker plate having a central opening aligned with the opening in said breaker plate, said metallic shield comprised of first and second shield parts having overlapping engaging edges and having semicircular complementary openings defining said central opening in said shield, said first and second shield parts each having lower edges engaging the peripheral edge of said breaker plate and at least one of said shield parts having an inwardly struck portion engaging said one wall of said breaker plate, and removable fastener means for respectively removably securing said shield parts to said breaker plate, said shield and breaker plate defining a metallic enclosure containing said breaker contact means, said capacitor and said capacitor lead wire, said enclosure serving to reduce radiation of radio interference signals developed within said enclosure during use of said assembly.
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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |