Patent US3230319A successfully refreshed from Google Patents.
US3230319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic ear phone
Assignee: Plastic Mold & Engineering Co
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Filing: 1963-05-24
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Granted: 1966-01-18
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Expires: 1983-05-24
Abstract
No abstract record available.
Inventors
- 👤 Kliewer Donald Leroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:51
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12; H04R7/122; H04R9/00; H04R9/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A DYNAMIC EAR PHONE COMPRISING A FRAME HAVING A SHELL PROVIDED WITH AN AXIAL BORE, A TAPERED BODY SECTION PROVIDED WITH A PLURALITY OF AIR PORTS, AND A CHAMBER HAVING A WALL PROVIDED WITH A DIAPHRAGM SEAT, A MOVABLE DIAPHRAGM OF A GENERAL CONICAL SHAPE HAVING A MEDIALDE AREA AND A TAPERING OUTWARDLY EXTENDING CIRCULAR SIDE PORTION, STIFF AUXILIARY MEMBRANE, MEANS FASTENING SAID STIFF AUXILIARY MEMBRANE TO SAID DIAPHRAGM AT SAID MEDIAL AREA WITH AN AIR SPACE BETWEEN SAID MEDIAL AREA AND SAID STIFF AUXILIARY MEMBRANE, A VOICE COIL, MEANS FASTENING SAID VOICE COIL TO SAID DIAPHRAGM AT SAID MEDIAL AREA, A MAGNETIC STRUCTURE HAVING INNER AND OUTER POLE PIECES PROVIDED WITH AN AIR GAP THEREBETWEEN, MEANS FASTENING SAID MOVABLE DIAPHRAGM IN SAID DIAPHRAGM SEAT WITH SAID VOICE COIL DISPOSED WITHIN SAID AIR GAP, SAID DIAPHRAGM BEING LOCATED IN SAID CHAMBER AND DIVIDING SAID CHAMBER INTO TWO SECTIONS, MEANS FASTENING SAID MAGNETIC STRUCTURE IN SAID AXIAL BORE, A COVER PROVIDED WITH A CAVITY, AND MEANS FASTENING SAID COVER TO SAID FRAME TO PROVIDE BACK PRESSURE ON SAID DIAPHRAGM THROUGH ONE OF SAID TWO SECTIONS, SAID PLURALITY OF AIR PORTS AND SAID CAVITY.
Claim 2
Dependent Claim
192 words
A DYNAMIC EAR PHONE COMPRISING A FRAME HAVING A SHELL PROVIDED WITH AN AXIAL BORE, A TAPERED BODY SECTION PROVIDED WITH A PLURALITY OF AIR PORTS, AND A CHAMBER HAVING A WALL PROVIDED WITH A DIAPHRAGM SEAT, A MOVABLE DIAPHRAGM OF A GENERAL CONICAL SHAPE HAVING A MEDIALDE AREA AND A TAPERING OUTWARDLY EXTENDING CIRCULAR SIDE PORTION, STIFF AUXILIARY MEMBRANE, MEANS FASTENING SAID STIFF AUXILIARY MEMBRANE TO SAID DIAPHRAGM AT SAID MEDIAL AREA WITH AN AIR SPACE BETWEEN SAID MEDIAL AREA AND SAID STIFF AUXILIARY MEMBRANE, A VOICE COIL, MEANS FASTENING SAID VOICE COIL TO SAID DIAPHRAGM AT SAID MEDIAL AREA, A MAGNETIC STRUCTURE HAVING INNER AND OUTER POLE PIECES PROVIDED WITH AN AIR GAP THEREBETWEEN, MEANS FASTENING SAID MOVABLE DIAPHRAGM IN SAID DIAPHRAGM SEAT WITH SAID VOICE COIL DISPOSED WITHIN SAID AIR GAP, SAID DIAPHRAGM BEING LOCATED IN SAID CHAMBER AND DIVIDING SAID CHAMBER INTO TWO SECTIONS, MEANS FASTENING SAID MAGNETIC STRUCTURE IN SAID AXIAL BORE, A COVER PROVIDED WITH A CAVITY, AND MEANS FASTENING SAID COVER TO SAID FRAME TO PROVIDE BACK PRESSURE ON SAID DIAPHRAGM THROUGH ONE OF SAID TWO SECTIONS, SAID PLURALITY OF AIR PORTS AND SAID CAVITY.
References Cited (Backward Citations)
US2641329A
Cited
US2838607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |