US4235213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hall effect ignition system housing
Assignee: Motorola Solutions Inc
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Filing: 1978-09-14
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Granted: 1980-11-25
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Expires: 1998-09-14
Abstract
Abstract A housing contains a circuit board having a Hall effect sensor attached thereupon and a magnetic circuit positioned to provide magnetic flux through the Hall effect sensor. The magnetic flux through the Hall effect sensor is interruptable by a high permeability vane moving through an air gap in the magnetic circuit, activating the Hall effect sensor to provide timing signals for an automotive ignition distributor system. The base of the housing has locating bosses for positioning the housing on a swing arm of the ignition distributor which is pivotable about the axis of the distributor shaft. Mutually perpendicular surfaces contained within the housing provide reference locations for positioning the circuit board with respect to the housing. The housing has respective portions for containing a flux concentrator and a magnetic and pole piece assembly on opposite sides of the circuit board. Adhesive means fix the magnetic circuit elements and the circuit board in position so as to provide an air gap between the circuit board and the magnet and pole piece assembly for passage of the moving vane, which interrupts the magnetic flux passing through the air gap and through the Hall effect sensor.
Inventors
- 👤 Roy H. Jellissen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:49
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/07
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
236 words
In an automotive ignition distributor system, having a swing arm pivotable about the axis of a distributor shaft, an improved housing for a magnetic circuit and a circuit board, said magnetic circuit interruptable by a high permeability vane moving through an air gap in said magnetic circuit, said circuit board having a Hall effect sensor attached thereto, said housing comprising: a base; means including a plurality of predetermined reference surfaces attached to said base for contacting and positioning said circuit board at a reference location with respect to said base; means including a recessed portion attached to said base for adjustably receiving a first portion of said magnetic circuit; means for fixedly locating the first portion of said magnetic circuit with respect to said circuit board; means including a recessed portion attached to said base for adjustably receiving a second portion of said magnetic circuit; means for fixedly locating the second portion of said magnetic circuit with respect to said circuit board to form a predetermined air gap therebetween; and means affixed to said base for locating said base on said swing arm, and thereby locating said base with respect to the distributor shaft axis, said means predeterminedly located with respect to the reference location for said circuit board, whereby said housing enables accurately defining said air gap with respect to said circuit board and Hall effect sensor and with respect to said distributor shaft axis.
Claim 2
Dependent Claim
236 words
In an automotive ignition distributor system, having a swing arm pivotable about the axis of a distributor shaft, an improved housing for a magnetic circuit and a circuit board, said magnetic circuit interruptable by a high permeability vane moving through an air gap in said magnetic circuit, said circuit board having a Hall effect sensor attached thereto, said housing comprising: a base; means including a plurality of predetermined reference surfaces attached to said base for contacting and positioning said circuit board at a reference location with respect to said base; means including a recessed portion attached to said base for adjustably receiving a first portion of said magnetic circuit; means for fixedly locating the first portion of said magnetic circuit with respect to said circuit board; means including a recessed portion attached to said base for adjustably receiving a second portion of said magnetic circuit; means for fixedly locating the second portion of said magnetic circuit with respect to said circuit board to form a predetermined air gap therebetween; and means affixed to said base for locating said base on said swing arm, and thereby locating said base with respect to the distributor shaft axis, said means predeterminedly located with respect to the reference location for said circuit board, whereby said housing enables accurately defining said air gap with respect to said circuit board and Hall effect sensor and with respect to said distributor shaft axis.
Claim 3
Dependent Claim
49 words
The housing of claim 1 wherein the housing is formed from a heat conductive material and wherein a portion of the circuit board has at least one heat producing component, said portion of the circuit board coupled to said housing to provide heat sinking for said heat producing component.
Claim 4
Dependent Claim
12 words
The housing of claim 1 wherein the reference surfaces are mutually perpendicular.
Claim 5
Dependent Claim
34 words
The housing of claim 1 wherein the means for adjustably receiving a first portion of said magnetic circuit includes an upstanding portion having a recess contained therein to receive the first magnetic circuit portion.
Claim 6
Dependent Claim
22 words
The housing of claim 1 wherein the means for fixedly locating the first portion of said magnetic circuit includes an adhesive means.
Claim 7
Dependent Claim
34 words
The housing of claim 1 wherein the means for adjustably receiving a second portion of said magnetic circuit includes an upstanding portion having a recess contained therein to receive the second magnetic circuit portion.
Claim 8
Dependent Claim
22 words
The housing of claim 1 wherein the means for fixedly locating the second portion of said magnetic circuit includes an adhesive means.
Claim 9
Dependent Claim
51 words
The housing of claim 1 wherein the means for locating said base on said swing arm includes raised portions, the exterior surfaces of which are dimensioned to match respective mating portions on said swing arm to provide positioning of said housing with respect to the vane moving through the air gap.
Claim 10
Dependent Claim
11 words
The housing of claim 1 wherein the raised portions are bosses.
Claim 11
Dependent Claim
225 words
In an automotive ignition distributor system, having a swing arm pivotable about the axis of a distributor shaft, an improved housing for a magnetic circuit interruptable by a high permeability vane moving through an air gap in said magnetic circuit, said housing also for a circuit board having a Hall effect sensor attached thereto, and said Hall effect sensor positioned in the air gap, said housing comprising: a base having locating bosses affixed thereto which cooperate with respective mating portions of said swing arm for positioning said housing with respect to the distributor shaft axis; a plurality of orthogonal reference surfaces contained within said housing to contact and provide positioning of said circuit board with respect to the bosses on the base; a first upstanding portion attached to said base and containing a recess for receiving a concentrator portion of said magnetic circuit; adhesive means for fixing said concentrator portion of said magnetic circuit in the recess of said first upstanding portion; a second upstanding portion attached to said base and containing a recess for receiving a magnet and pole piece portion of said magnetic circuit; adhesive means for fixing said magnet and pole piece portion in the recess of said second upstanding portion to provide a predetermined air gap between said assembly circuit board and said magnet and pole piece of said magnetic circuit.
Claim 12
Dependent Claim
225 words
In an automotive ignition distributor system, having a swing arm pivotable about the axis of a distributor shaft, an improved housing for a magnetic circuit interruptable by a high permeability vane moving through an air gap in said magnetic circuit, said housing also for a circuit board having a Hall effect sensor attached thereto, and said Hall effect sensor positioned in the air gap, said housing comprising: a base having locating bosses affixed thereto which cooperate with respective mating portions of said swing arm for positioning said housing with respect to the distributor shaft axis; a plurality of orthogonal reference surfaces contained within said housing to contact and provide positioning of said circuit board with respect to the bosses on the base; a first upstanding portion attached to said base and containing a recess for receiving a concentrator portion of said magnetic circuit; adhesive means for fixing said concentrator portion of said magnetic circuit in the recess of said first upstanding portion; a second upstanding portion attached to said base and containing a recess for receiving a magnet and pole piece portion of said magnetic circuit; adhesive means for fixing said magnet and pole piece portion in the recess of said second upstanding portion to provide a predetermined air gap between said assembly circuit board and said magnet and pole piece of said magnetic circuit.
Claim 13
Dependent Claim
56 words
The housing of claim 2 wherein said circuit board is formed from a ceramic material, and wherein said portion of said circuit board coupled to said housing to provide heat sinking comprises a flat surface which is mounted flush against one of said reference surfaces for contacting and positioning the circuit board at said reference location.
Claim 14
Dependent Claim
16 words
The housing of claims 2 or 11 wherein said housing is formed from a metallic material.
Claim 15
Dependent Claim
12 words
The housing of claim 12 wherein said housing comprises a zinc casting.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |