US3882962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker equipment
Assignee: Individual
•
Filing: 1973-10-03
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Granted: 1975-05-13
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Expires: 1993-10-03
Abstract
Abstract Loudspeaker equipment especially adapted for use in an automobile and having a speaker enclosure comprising two interconnected chambers one of which is thin or shallow and is adapted to fit under an automobile seat, and the other of which is enlarged and accommodates a speaker, for instance a cone type speaker positioned with its axis extended upwardly. The walls of the speaker enclosure are constructed of sheet material such as thin plywood and the enclosure is substantially imperforate except for the speaker opening, to provide a resonant chamber adapted to accentuate the reproduction of sound at the bass end of the audio spectrum.
Inventors
- 👤 Warren Ripple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:08
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
Loudspeaker equipment comprising a speaker and a speaker enclosure, the enclosure having enclosure walls including walls defining a speaker chamber one end of which is generally rectangular and of relatively small vertical dimension in relation to its length and is adapted to be accommodated under an automobile seat, the upper and lower enclosure walls diverging to define an enlargement of the chamber at the other end thereof of relatively large dimension and having an opening presented upwardly and forwardly with respect to the automobile seat, and an apertured wall element in said opening with the speaker mounted thereon and exposed through the aperture in the wall and with its axis presented upwardly and forwardly with respect to the automobile seat.
Claim 2
Dependent Claim
120 words
Loudspeaker equipment comprising a speaker and a speaker enclosure, the enclosure having enclosure walls including walls defining a speaker chamber one end of which is generally rectangular and of relatively small vertical dimension in relation to its length and is adapted to be accommodated under an automobile seat, the upper and lower enclosure walls diverging to define an enlargement of the chamber at the other end thereof of relatively large dimension and having an opening presented upwardly and forwardly with respect to the automobile seat, and an apertured wall element in said opening with the speaker mounted thereon and exposed through the aperture in the wall and with its axis presented upwardly and forwardly with respect to the automobile seat.
Claim 3
Dependent Claim
36 words
Loudspeaker equipment as defined in claim 1 in which the chamber is defined by walls at least in large part formed of sheet material and said walls being substantially completely imperforate except for the speaker aperture.
Claim 4
Dependent Claim
34 words
Loudspeaker equipment as defined in claim 1 in which said walls comprise sheets of plywood of thickness of the order of 1/8 inch, the walls being bonded to each other at their meeting edges.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |