Patent US3138667A successfully refreshed from Google Patents.
US3138667A
Expired / Lapsed
US
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Loudspeaker system
Assignee: Bosch Security Systems Inc
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Filing: 1962-03-29
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Granted: 1964-06-23
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Robert C Avedon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:38
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/40; H04R1/403
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A LOUDSPEAKER SYSTEM FOR REPRODUCING A CONTINUOUS RANGE OF FREQUENCIES COMPRISING MEANS SUPPORTING A PLURALITY OF LOUDSPEAKERS ADJACENT TO EACH OTHER TO FORM A LINE SOURCE OF ACOUSTICAL RADIATION, THE LENGTH OF THE LINE SOURCE OF ACOUSTICAL RADIATION EXCEEDING FOUR WAVELENGTHS AT THE HIGHEST FREQUENCY TO BE REPRODUCED, THE LINE HAVING TWO ADJACENT SEGMENTS FORMED BY SAID PLURALITY OF LOUDSPEAKERS, THE FIRST SEGMENT BEING FORMED BY A FIRST GROUP OF LOUDSPEAKERS AND THE SECOND SEGMENT BEING FORMED BY A SECOND GROUP OF LOUDSPEAKERS ADJACENT TO THE FIRST GROUP, AND MEANS OPERATIVELY ASSOCIATED WITH THE FIRST GROUP OF LOUDSPEAKERS FOR LIMITING THE RESPONSE OF THIS GROUP OF SPEAKERS TO SOUNDS HAVING WAVELENGTHS LONGER THAN A VALUE IN THE RANGE BETWEEN ONE-FOURTH THE LENGTH AND THE LENGTH OF THE SEGMENT OF THE LINE FORMED BY THE SECOND GROUP OF LOUDSPEAKERS.
Claim 2
Dependent Claim
138 words
A LOUDSPEAKER SYSTEM FOR REPRODUCING A CONTINUOUS RANGE OF FREQUENCIES COMPRISING MEANS SUPPORTING A PLURALITY OF LOUDSPEAKERS ADJACENT TO EACH OTHER TO FORM A LINE SOURCE OF ACOUSTICAL RADIATION, THE LENGTH OF THE LINE SOURCE OF ACOUSTICAL RADIATION EXCEEDING FOUR WAVELENGTHS AT THE HIGHEST FREQUENCY TO BE REPRODUCED, THE LINE HAVING TWO ADJACENT SEGMENTS FORMED BY SAID PLURALITY OF LOUDSPEAKERS, THE FIRST SEGMENT BEING FORMED BY A FIRST GROUP OF LOUDSPEAKERS AND THE SECOND SEGMENT BEING FORMED BY A SECOND GROUP OF LOUDSPEAKERS ADJACENT TO THE FIRST GROUP, AND MEANS OPERATIVELY ASSOCIATED WITH THE FIRST GROUP OF LOUDSPEAKERS FOR LIMITING THE RESPONSE OF THIS GROUP OF SPEAKERS TO SOUNDS HAVING WAVELENGTHS LONGER THAN A VALUE IN THE RANGE BETWEEN ONE-FOURTH THE LENGTH AND THE LENGTH OF THE SEGMENT OF THE LINE FORMED BY THE SECOND GROUP OF LOUDSPEAKERS.
References Cited (Backward Citations)
US2632055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |