Patent US4508941A successfully refreshed from Google Patents.
US4508941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voice coil centering and suspension for vented pole piece
Assignee: Community Light and Sound Inc
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Filing: 1982-10-28
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Granted: 1985-04-02
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Expires: 2002-10-28
Abstract
Abstract An apparatus and method for centering a voice coil in a loudspeaker having a vented pole piece. The voice coil centering is accomplished by means of a concentrically located voice coil suspension and an attached cylindrical mounting ring that can be set into a recess, or otherwise positively located on the pole piece. The pole piece is formed in such a way so as to precisely receive a suspension mounting ring and center the voice coil in the magnetic field gap with no further adjustments. This invention permits the use of a pole piece mounted voice coil suspension on a ventilated pole piece.
Inventors
- 👤 John T. Wiggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:43
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04; H04R9/041; G; G01; G01P; G01P13/00; G01P13/02; G01P13/04; G01P13/045; G01P3/00; G01P3/42; G01P3/44; G01P3/46
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
133 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, the pole piece having a concentric recess of predetermined diameter formed in the top thereof and the outer diameter of the mounting ring corresponding to the predetermined diameter, whereby the mounting ring may be received in the recess and positively held in axial alignment with the pole piece, the voice coil being thereby automatically properly positioned in the air gap.
Claim 2
Dependent Claim
133 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, the pole piece having a concentric recess of predetermined diameter formed in the top thereof and the outer diameter of the mounting ring corresponding to the predetermined diameter, whereby the mounting ring may be received in the recess and positively held in axial alignment with the pole piece, the voice coil being thereby automatically properly positioned in the air gap.
Claim 3
Dependent Claim
21 words
The mounting arrangement of claim 1, wherein the mounting ring and the voice coil suspension are adhesively fixed to one another.
Claim 4
Dependent Claim
24 words
The mounting arrangement of claim 2, wherein the voice coil suspension and the diaphragm and voice coil assembly are adhesively fixed to one another.
Claim 5
Dependent Claim
18 words
The mounting arrangement of claim 1, wherein the mounting ring and the voice coil suspension are integrally formed.
Claim 6
Dependent Claim
21 words
The mounting arrangement of claim 1, further comprising means for attaching the diaphragm and voice coil assembly to the pole piece.
Claim 7
Dependent Claim
13 words
The mounting arrangement of claim 5, wherein the attaching means comprises adhesive bonding.
Claim 8
Dependent Claim
17 words
The mounting arrangement of claim 1, wherein the mounting ring and the pole piece are threadably engaged.
Claim 9
Dependent Claim
19 words
The mounting arrangement of claim 1, wherein the diaphragm and voice coil assembly are manufactured as an integral unit.
Claim 10
Independent Claim
136 words
A method for mounting a diaphragm and voice coil assembly in a magnetic structure have an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, comprising the steps of: forming a mounting ring with a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; providing interfitting structure partly on the mounting ring and partly on the pole piece for automatically properly positioning the voice coil in the air gap when the mounting ring and the pole piece are interfitted; and, attaching the diaphragm and voice coil assembly to the pole piece with means including electrically conductive members for carrying current to and from the voice coil.
Claim 11
Independent Claim
136 words
A method for mounting a diaphragm and voice coil assembly in a magnetic structure have an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, comprising the steps of: forming a mounting ring with a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; providing interfitting structure partly on the mounting ring and partly on the pole piece for automatically properly positioning the voice coil in the air gap when the mounting ring and the pole piece are interfitted; and, attaching the diaphragm and voice coil assembly to the pole piece with means including electrically conductive members for carrying current to and from the voice coil.
Claim 12
Dependent Claim
22 words
The method of claim 9, comprising the step of adhesively bonding the mounting ring and the voice coil suspension to one another.
Claim 13
Dependent Claim
25 words
The method of claim 10, comprising the step of adhesively bonding the voice coil suspension and the diaphragm and voice coil assembly to one another.
Claim 14
Dependent Claim
19 words
The method of claim 9, comprising the step of integrally forming the mounting ring and the voice coil suspension.
Claim 15
Dependent Claim
20 words
The method of claim 9, comprising the step of forming the diaphragm and voice coil assembly as an integral unit.
Claim 16
Independent Claim
125 words
A method for mounting a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, comprising the steps of: forming a mounting ring with a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; removing portions of the mounting ring to form additional air channels for cooling; and, providing interfitting structure partly on the mounting ring and partly on the pole piece, whereby the voice coil will be automatically properly positioned in the air gap when the mounting ring and the pole piece are interfitted.
Claim 17
Independent Claim
125 words
A method for mounting a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, comprising the steps of: forming a mounting ring with a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; removing portions of the mounting ring to form additional air channels for cooling; and, providing interfitting structure partly on the mounting ring and partly on the pole piece, whereby the voice coil will be automatically properly positioned in the air gap when the mounting ring and the pole piece are interfitted.
Claim 18
Dependent Claim
129 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; means for attaching the diaphragm and voice coil assembly to the pole piece, the attaching means including electrically conductive members for carrying current to and from the voice coil; and, interfitting structure disposed partly on the mounting ring and partly on the pole piece, whereby the voice coil will be automatically properly positioned in the air gap.
Claim 19
Dependent Claim
129 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; means for attaching the diaphragm and voice coil assembly to the pole piece, the attaching means including electrically conductive members for carrying current to and from the voice coil; and, interfitting structure disposed partly on the mounting ring and partly on the pole piece, whereby the voice coil will be automatically properly positioned in the air gap.
Claim 20
Dependent Claim
14 words
The mounting arrangement of claim 15, wherein the attaching means comprises electrically conductive bolts.
Claim 21
Dependent Claim
21 words
The mounting arrangement of claim 15, wherein the mounting ring and the voice coil suspension are adhesively fixed to one another.
Claim 22
Dependent Claim
24 words
The mounting arrangement of claim 17, wherein the voice coil suspension and the diaphragm and voice coil assembly are adhesively fixed to one another.
Claim 23
Dependent Claim
18 words
The mounting arrangement of claim 15, wherein the mounting ring and the voice coil suspension are integrally formed.
Claim 24
Dependent Claim
19 words
The mounting arrangement of claim 15, wherein the diaphragm and voice coil assembly are manufactured as an integral unit.
Claim 25
Dependent Claim
110 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, the arrangement comprising: a mounting ring having cut-away portions therein forming channels for additional air cooling; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, interfitting structure disposed partly on the mounting ring and partly on the pole piece, whereby the voice coil will be automatically properly positioned in the air gap.
Claim 26
Dependent Claim
110 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must be aligned, the arrangement comprising: a mounting ring having cut-away portions therein forming channels for additional air cooling; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, interfitting structure disposed partly on the mounting ring and partly on the pole piece, whereby the voice coil will be automatically properly positioned in the air gap.
Claim 27
Dependent Claim
127 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, the pole piece having a ridge on the upper surface and the mounting ring having a corresponding groove on a lower surface, the ridge and the groove forming interfitting structure for positively positioning the mounting ring in axial alignment with the pole piece, the voice coil being thereby automatically properly positioned in the air gap.
Claim 28
Dependent Claim
127 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, the pole piece having a ridge on the upper surface and the mounting ring having a corresponding groove on a lower surface, the ridge and the groove forming interfitting structure for positively positioning the mounting ring in axial alignment with the pole piece, the voice coil being thereby automatically properly positioned in the air gap.
Claim 29
Dependent Claim
106 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, interfitting structure disposed partly on the mounting ring and partly on the pole piece formed by projecting pins and receiving sockets, whereby the voice coil will be automatically properly positioned in the air gap.
Claim 30
Dependent Claim
106 words
A self-centering mounting arrangement for a diaphragm and voice coil assembly in a magnetic structure having an axially vented pole piece which defines an inner boundary for an air gap in the magnetic structure, in which air gap the voice coil must aligned, the arrangement comprising: a mounting ring; a voice coil suspension for the diaphragm and voice coil assembly projecting outwardly from the mounting ring and in axial alignment therewith; and, interfitting structure disposed partly on the mounting ring and partly on the pole piece formed by projecting pins and receiving sockets, whereby the voice coil will be automatically properly positioned in the air gap.
References Cited (Backward Citations)
US287896A
Cited
FR579614A
Cited
US1909275A
Cited
US1990858A
Cited
US2047361A
Cited
US1991526A
Cited
US2085721A
Cited
US2123640A
Cited
US2071828A
Cited
US2091011A
Cited
US2178030A
Cited
US2347799A
Cited
US2278598A
Cited
DE1020677B
Cited
US3033945A
Cited
US3581015A
Cited
US3496307A
Cited
US3796839A
Cited
US4239943A
Cited
US4313040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |