US3190389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker construction
Assignee: General Electric Co
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Filing: 1963-06-20
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Granted: 1965-06-22
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Expires: 1983-06-20
Abstract
No abstract record available.
Inventors
- 👤 Adeolore F Petrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:36
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12; H04R7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
IN A LOUDSPEAKER OF THE TYPE RESPONSIVE SOLELY TO RELATIVELY LOW FREQUENCIES, A LOUDSPEAKER CONE COMPRISING AN ANNULAR APEX AREA OF MINIMUM DIAMETER, FIRST AND SEC OND ANNULAR SOUND RADIATING SECTIONS INTEGRATED INTO A GENERALLY CONICAL OVERALL CONFIGURATION , SAID FIRST SOUND RADIATING SECTION HAVING AN INWARDLY CONCAVE SHAPE ON RESPECT TO THE CENTRAL AXIS OF THE CONE AND DISPOSED ON ONE SIDE OF A REFERENCE CONE, SAID FIRST SOUND RADIATING SECTION BEING DISPOSED ADJACENT SAID APEX AREA, THEREBY ENABLING SAID CONE TO FUNCTION AS A WOOFER, SAID SECOND SOUND RADIATING SECTION HAVING AN INWARDLY CONVES SHAPE WITH RESPECT TO THE CENTRAL AXIS OF THE CONE AND DISPOSED ON THE OTHER SIDE OF SAID REFERENCE CONE, SAID FIRST AND SECOND SECTIONS BEING DIMENSIONED RELATIVE CONE SO THAT THEY AND ARRANGED RELATIVE TO SAID REFERENCE CONE SO THAT THEY MAY PROVIDE EQUAL AND OPPOSITE RADIATION DURING A PREDETERMINED PORTION OF THE FREQUENCY RANGE OF OPERATION OF THE LOUDSPEAKER, THEREBY TO ENHANCE THE SMOOTHNESS OF RESPONSE OF SAID LOUDSPEAKER.
Claim 2
Dependent Claim
167 words
IN A LOUDSPEAKER OF THE TYPE RESPONSIVE SOLELY TO RELATIVELY LOW FREQUENCIES, A LOUDSPEAKER CONE COMPRISING AN ANNULAR APEX AREA OF MINIMUM DIAMETER, FIRST AND SEC OND ANNULAR SOUND RADIATING SECTIONS INTEGRATED INTO A GENERALLY CONICAL OVERALL CONFIGURATION , SAID FIRST SOUND RADIATING SECTION HAVING AN INWARDLY CONCAVE SHAPE ON RESPECT TO THE CENTRAL AXIS OF THE CONE AND DISPOSED ON ONE SIDE OF A REFERENCE CONE, SAID FIRST SOUND RADIATING SECTION BEING DISPOSED ADJACENT SAID APEX AREA, THEREBY ENABLING SAID CONE TO FUNCTION AS A WOOFER, SAID SECOND SOUND RADIATING SECTION HAVING AN INWARDLY CONVES SHAPE WITH RESPECT TO THE CENTRAL AXIS OF THE CONE AND DISPOSED ON THE OTHER SIDE OF SAID REFERENCE CONE, SAID FIRST AND SECOND SECTIONS BEING DIMENSIONED RELATIVE CONE SO THAT THEY AND ARRANGED RELATIVE TO SAID REFERENCE CONE SO THAT THEY MAY PROVIDE EQUAL AND OPPOSITE RADIATION DURING A PREDETERMINED PORTION OF THE FREQUENCY RANGE OF OPERATION OF THE LOUDSPEAKER, THEREBY TO ENHANCE THE SMOOTHNESS OF RESPONSE OF SAID LOUDSPEAKER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |