US3609253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker with improved voice coil suspension
Assignee: Individual
•
Filing: 1968-05-03
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Granted: 1971-09-28
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Expires: 1988-05-03
Abstract
Abstract A loudspeaker driver having its voice coil wound on a movable bobbin that is flexibly supported at both of its ends, with the bobbin resiliently suspended in such a manner where only an inand-out movement is permitted.
Inventors
- 👤 William J Ashworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R9/066
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
An electromechanical transducer, comprising a magnet and a center pole core disposed within said magnet, said center pole core being provided with means for mounting said center pole core to provide an airgap between said magnet and said center pole core, a coil of wire wound on a coil-carrying means with said coil being disposed in said airgap for rectilinear oscillatory movement; wherein, said coil-carrying means is disposed within and along the entire length of and outward from each end of said airgap and extending along the entire length and outward from each end of said center pole core with said coil-carrying means being carried by plural resilient support means whereby, said coil is disposed between two of said resilient support means and said center pole core is disposed between two of said resilient support means and an opening being provided at the mounting end of said center pole core for the passage therethrough of said coil-carrying means.
Claim 2
Dependent Claim
158 words
An electromechanical transducer, comprising a magnet and a center pole core disposed within said magnet, said center pole core being provided with means for mounting said center pole core to provide an airgap between said magnet and said center pole core, a coil of wire wound on a coil-carrying means with said coil being disposed in said airgap for rectilinear oscillatory movement; wherein, said coil-carrying means is disposed within and along the entire length of and outward from each end of said airgap and extending along the entire length and outward from each end of said center pole core with said coil-carrying means being carried by plural resilient support means whereby, said coil is disposed between two of said resilient support means and said center pole core is disposed between two of said resilient support means and an opening being provided at the mounting end of said center pole core for the passage therethrough of said coil-carrying means.
Claim 3
Dependent Claim
27 words
An electromechanical transducer according to claim 1 wherein, at least one of said resilient support means is a diaphragm for transmitting audible vibrations into the surrounding area.
Claim 4
Dependent Claim
19 words
An electromechanical transducer according to claim 1 wherein, said coil carrying means is solidly coupled to a sounding board.
Claim 5
Dependent Claim
19 words
An electromechanical transducer according to claim 1 wherein, said sounding board is the sole support means for said transducer.
References Cited (Backward Citations)
US1808149A
Cited
US2556816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |