Patent US4315112A successfully refreshed from Google Patents.
US4315112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speaker
Assignee: Individual
•
Filing: 1979-12-12
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Granted: 1982-02-09
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Expires: 1999-12-12
Abstract
Abstract An improved speaker is provided for stereo headsets and the like. The diaphragm for the speaker comprises the dome of an inverted polyester film cup centered within a flurocarbon film diaphragm member. The voice coil for the speaker is wound directly about the periphery of the cup and the adhesive joint between the cup and the diaphragm comprises the sole adhesive joint of a diaphragm.
Inventors
- 👤 Alan Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:47
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04; H04R9/045; H04R7/00; H04R7/02; H04R7/12; H04R7/122; H04R7/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
148 words
A speaker comprising: a housing having an open top end, a diaphragm assembly closing said top end; said diaphragm assembly comprising a first generally half-torrodial shaped diaphragm member formed of a fluoropolymer film and having an open center section and a second diaphragm member in the form of an inverted cup having a dome positioned in and closing said center section, said second diaphragm member being formed of a plastic film material dissimilar to said first diaphragm member film; a voice coil wound directly about said cup; a magnetic assembly positioned within said housing axially aligned with said cup, said magnetic assembly including a magnetic pole piece and permanent magnet magnetized parallel to the axis of said cup and a magnetic yoke, said yoke including portions extending about said pole piece and permanent magnet and spaced therefrom to form a gap within which said voice coil is captured.
Claim 2
Dependent Claim
148 words
A speaker comprising: a housing having an open top end, a diaphragm assembly closing said top end; said diaphragm assembly comprising a first generally half-torrodial shaped diaphragm member formed of a fluoropolymer film and having an open center section and a second diaphragm member in the form of an inverted cup having a dome positioned in and closing said center section, said second diaphragm member being formed of a plastic film material dissimilar to said first diaphragm member film; a voice coil wound directly about said cup; a magnetic assembly positioned within said housing axially aligned with said cup, said magnetic assembly including a magnetic pole piece and permanent magnet magnetized parallel to the axis of said cup and a magnetic yoke, said yoke including portions extending about said pole piece and permanent magnet and spaced therefrom to form a gap within which said voice coil is captured.
Claim 3
Dependent Claim
19 words
The speaker in accordance with claim 1 further comprising a glue joint joining said cup and said first diaphragm.
Claim 4
Dependent Claim
21 words
The speaker in accordance with claim 1 wherein said coil terminates in a pair of leads extending over said first diaphragm.
Claim 5
Dependent Claim
31 words
The speaker in accordance with claim 1 further comprising filter means disposed in said housing underlying said first diaphragm and said housing is provided with openings therein underlying first said diaphragm.
Claim 6
Dependent Claim
21 words
The invention in accordance with claim 1 wherein said cup is formed of a harder film material than said first diaphragm.
Claim 7
Dependent Claim
19 words
The invention in accordance with claim 1 wherein said cup is formed of a polyester film or polycarbonate film.
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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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |