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US3792526A
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US
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Method of sound transducer construction
Assignee: LTV LING ALTEC Inc
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Filing: 1971-04-21
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Granted: 1974-02-19
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Expires: 1991-04-21
Abstract
Abstract A method of constructing a sound transducer which obviates the need for certain centering and fixture practices relative to assembly of the diaphragm element and voice coil within the air gap defined by a magnet structure. The method consists of forming a rearward or forward oriented frame assembly with selected concentric configurations matingly adapted to receive similarly shaped diaphragm elements and the outer concentric edge of the magnet such that it must then follow that the voice coil is properly positioned within the air gap in non-interfering disposition.
Inventors
- 👤 G Bremseth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:48
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/22; H04R7/02; H04R7/12; H04R7/127; H04R9/00; H04R9/02; H04R9/04; H04R9/041; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005; Y10T29/4902; Y10T29/49073; Y10T29/49826; Y10T29/4984
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
A method of constructing a sound transducer of the type which includes a transverse frame element securing a permanent magnet assembly defining an air gap, a diaphragm element and a voice coil in proper operative position, such construction comprising the steps of: forming said diaphragm element unitarily to include at least one concentric surface around an outer portion of said diaphragm element, which concentric surface extends parallel to the axis of movement of the diaphragm element, said diaphragm element further supporting a concentric voice coil in secure affixure; forming said magnet assembly to define an air gap for noninterfering coaction with said voice coil when assembled, said magnet assembly being formed to have a selected diameter of that portion adjacent the diaphragm when assembled; forming said transverse frame element to include a first cylindrical bore having said pre-selected diameter, and a second cylindrical bore therein which is concentric but having a reduced diameter such that the second cylindrical bore wall will receive said diaphragm element concentric surface securely therein; and assembling the diaphragm element, magnet assembly and transverse frame element to form the sound transducer wherein the cylindrical surface, cylindrical bores and magnet assembly of pre-selected diameter cooperate to orient and position the diaphragm element and voice coil, the transverse framE, and the magnet and air gap in proper operative position.
Claim 2
Independent Claim
221 words
A method of constructing a sound transducer of the type which includes a transverse frame element securing a permanent magnet assembly defining an air gap, a diaphragm element and a voice coil in proper operative position, such construction comprising the steps of: forming said diaphragm element unitarily to include at least one concentric surface around an outer portion of said diaphragm element, which concentric surface extends parallel to the axis of movement of the diaphragm element, said diaphragm element further supporting a concentric voice coil in secure affixure; forming said magnet assembly to define an air gap for noninterfering coaction with said voice coil when assembled, said magnet assembly being formed to have a selected diameter of that portion adjacent the diaphragm when assembled; forming said transverse frame element to include a first cylindrical bore having said pre-selected diameter, and a second cylindrical bore therein which is concentric but having a reduced diameter such that the second cylindrical bore wall will receive said diaphragm element concentric surface securely therein; and assembling the diaphragm element, magnet assembly and transverse frame element to form the sound transducer wherein the cylindrical surface, cylindrical bores and magnet assembly of pre-selected diameter cooperate to orient and position the diaphragm element and voice coil, the transverse framE, and the magnet and air gap in proper operative position.
Claim 3
Dependent Claim
86 words
A method of constructing a sound transducer as set forth in claim 1 wherein said step of forming said diaphragm element further comprises: forming a first annular portion having concentric inner and outer edges to extend outward from and adjacent to the forward edge of said at least one concentric surface, and a second annular portion having concentric inner and outer edges to extend inward from and adjacent to the rear edge of said at least one concentric surface to further form a central vibratable portion.
Claim 4
Dependent Claim
38 words
A method as set forth in claim 2 wherein said central vibratable portion is formed to include a second concentric, cylindrical surface equispaced within said first concentric surface to receive the voice coil securely in axial alignment therewith.
Claim 5
Dependent Claim
48 words
A method as set forth in claim 3 wherein said step of forming said frame element comprises: further forming said frame element to include similar mating shapes to receive each of said diaphragm element first and second annular portions and first and second concentric surfaces in secure juxtaposition.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |