US4933981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound system
Assignee: MAGNACOUSTICS Inc
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Filing: 1989-04-05
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Granted: 1990-06-12
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Expires: 2009-04-05
Abstract
Abstract A sound or acoustic system constructed entirely of magnetically inert components which remain unaffected by magnetic fields. A magnetically inert panel is provided, with at least one magnetically-inert transducer being mounted upon this panel. At least one hollow channel extends into the panel from an edge thereof, while a hole is positioned within the panel to communicate at one end with the channel and to open at an opposite end adjacent the transducer.
Inventors
- 👤 Wayne A. Lederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:00
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/345; A; A61; A61B; A61B5/00; A61B5/05; A61B5/055; G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/283
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A sound system constructed entirely of magnetically inert components which remain unaffected by magnetic fields and do not affect imaging quality, said system comprising a magnetically inert panel, at least one pair of magnetically-inert transducers mounted upon said panel one of which is a high-frequency transducer and the other of which is a low frequency transducer, at least one hollow channel extending into said panel from an edge thereof, an rf-tight enclosure, means to mount said panel in said rf-tight enclosure, said rf-tight enclosure comprising an opening to allow a wave guide tube to pass therethrough and communicate with said channel, said panel comprising at least one pair of holes, the holes positioned to communicate with said channel at one end thereof and to open said channel at an opposite end thereof adjacent said high frequency or low frequency transducer.
Claim 2
Dependent Claim
140 words
A sound system constructed entirely of magnetically inert components which remain unaffected by magnetic fields and do not affect imaging quality, said system comprising a magnetically inert panel, at least one pair of magnetically-inert transducers mounted upon said panel one of which is a high-frequency transducer and the other of which is a low frequency transducer, at least one hollow channel extending into said panel from an edge thereof, an rf-tight enclosure, means to mount said panel in said rf-tight enclosure, said rf-tight enclosure comprising an opening to allow a wave guide tube to pass therethrough and communicate with said channel, said panel comprising at least one pair of holes, the holes positioned to communicate with said channel at one end thereof and to open said channel at an opposite end thereof adjacent said high frequency or low frequency transducer.
Claim 3
Dependent Claim
82 words
The combination of claim 1, comprising a pair of hollow channels extending into said panel, a pair of high frequency transducers and a pair of low frequency transducers mounted upon said panel, two pairs of holes positioned in said panel, with a hole of each said pair positioned in said panel to communicate at one end thereof with one of said channels, and at an opposite end thereof, to open a respective channel adjacent a respective high frequency or low frequency transducer.
Claim 4
Dependent Claim
28 words
The combination of claim 2, wherein said rf-tight enclosure comprises a pair of openings to allow wave guide tubes to pass therethrough and to communicate with said channels.
Claim 5
Dependent Claim
29 words
The combination of claim 1, additionally comprising wave guide tubing made of an electrically conductive non-ferrous material mounted in said opening and extending into and out of said enclosure.
Claim 6
Dependent Claim
32 words
The combination of claim 3, additionally comprising a pair of wave guide tubes, each said tube mounted in a respective opening of said enclosure and extending into and out of said enclosure.
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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |