US3237713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustical chamber
Assignee: EDUCATIONAL RES ASSOCIATES Inc
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Filing: 1964-07-16
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Granted: 1966-03-01
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Expires: 1984-07-16
Abstract
No abstract record available.
Inventors
- 👤 John C L Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/033; H04R5/0335; H04R1/00; H04R1/10; H04R1/1008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
AN ACOUSTICAL CHAMBER ADAPTED FOR USE BY A STUDENT IN A SIDE-BY-SIDE CLASSROOM ARRANGEMENT TO PERMIT PERSONAL AUDIO INSTRUCTIONS THROUGH LOUD SPEAKERS WITHIN THE CHAMBER WHILE CONFINING THE AUDIO ENERGY THEREIN TO PREVENT INTERFERENCE, COMPRISING IN COMBINATION A GENERALLY HEMISPHERICALLY-SHAPED HEAD SURROUND SHELL OF SUBSTANTIALLY RIGID CONSTRUCTION ADAPTED TO BE SPACED FROM THE STUDENT''S HEAD ON ALL SIDES, SAID SHELL HAVING A GENERALLY U-SHAPED OPENING ON ONE SIDE TO FORM A FRONT ENTRYWAY OPENING TO PERMIT VISUAL COMMUNICATION WITH THE STUDENT; MEANS SUPPORTING SAID SHELL TO HOLD THE SAME AWAY FROM CONTACT WITH THE HEAD OF THE STUDENT A LAYER OF ACOUSTICALLY ABSORBING MATERIAL LINING SAID SHELL TO ABSORB THE AUDIO ENERGY THEREIN, AND A PAIR OF AUDIO LOUD SPEAKERS LOCATED ON OPPOSITE SIDES OF SAID SHELL IN SAID LAYER OF ABSORBING MATERIAL OUT OF CONTACT WITH THE STUDENT''S EARS, EACH SPEAKER BEING ORIENTED TO DIRECT SOUND WAVES DIRECTLY TOWARD THE ADJACENT EAR OF THE STUDENT IN A SOUND WAVE PATH SUBSTANTIALLY CONFINED WITHIN THE CHAMBER.
Claim 2
Dependent Claim
166 words
AN ACOUSTICAL CHAMBER ADAPTED FOR USE BY A STUDENT IN A SIDE-BY-SIDE CLASSROOM ARRANGEMENT TO PERMIT PERSONAL AUDIO INSTRUCTIONS THROUGH LOUD SPEAKERS WITHIN THE CHAMBER WHILE CONFINING THE AUDIO ENERGY THEREIN TO PREVENT INTERFERENCE, COMPRISING IN COMBINATION A GENERALLY HEMISPHERICALLY-SHAPED HEAD SURROUND SHELL OF SUBSTANTIALLY RIGID CONSTRUCTION ADAPTED TO BE SPACED FROM THE STUDENT''S HEAD ON ALL SIDES, SAID SHELL HAVING A GENERALLY U-SHAPED OPENING ON ONE SIDE TO FORM A FRONT ENTRYWAY OPENING TO PERMIT VISUAL COMMUNICATION WITH THE STUDENT; MEANS SUPPORTING SAID SHELL TO HOLD THE SAME AWAY FROM CONTACT WITH THE HEAD OF THE STUDENT A LAYER OF ACOUSTICALLY ABSORBING MATERIAL LINING SAID SHELL TO ABSORB THE AUDIO ENERGY THEREIN, AND A PAIR OF AUDIO LOUD SPEAKERS LOCATED ON OPPOSITE SIDES OF SAID SHELL IN SAID LAYER OF ABSORBING MATERIAL OUT OF CONTACT WITH THE STUDENT''S EARS, EACH SPEAKER BEING ORIENTED TO DIRECT SOUND WAVES DIRECTLY TOWARD THE ADJACENT EAR OF THE STUDENT IN A SOUND WAVE PATH SUBSTANTIALLY CONFINED WITHIN THE CHAMBER.
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |