US3570626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker with asymmetrically shaped diaphragm
Assignee: Nippon Gakki Co Ltd
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Filing: 1969-11-18
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Granted: 1971-03-16
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Expires: 1989-11-18
Abstract
Abstract A vibrating diaphragm having a planar shape which is an asymmetric geometric figure, the concept being improved by modifying the contour configuration of the vibrating diaphragm, for example by forming the contour of said diaphragm so that the opposite sides are not parallel or said contour has an irregular curvature.
Inventors
- 👤 Yasunori Mochida
- 👤 Ikuji Kurokawa
- 👤 Kazukiyo Ishimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:40
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, said diaphragm being of substantially elliptical shape having, in at least one peripheral part thereof, reverse curvature whereby a concave inward depression is formed, and on the basis of its length or maximum dimension of value A, the width or dimension perpendicular to said maximum dimension is of a value of approximately (650/900) A, and the concave inward depression is situated at a peripheral part thereof at a distance of approximately (600/900) A from one longitudinal end of the diaphragm and a distance of approximately from (350/900) A to (400/900) A from one longitudinal side of the diaphragm.
Claim 2
Dependent Claim
141 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, said diaphragm being of substantially elliptical shape having, in at least one peripheral part thereof, reverse curvature whereby a concave inward depression is formed, and on the basis of its length or maximum dimension of value A, the width or dimension perpendicular to said maximum dimension is of a value of approximately (650/900) A, and the concave inward depression is situated at a peripheral part thereof at a distance of approximately (600/900) A from one longitudinal end of the diaphragm and a distance of approximately from (350/900) A to (400/900) A from one longitudinal side of the diaphragm.
Claim 3
Dependent Claim
122 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, said configuration being of substantially elliptical shape having in at least one peripheral portion thereof, a concave curvilinear depression and in which on the basis of a maximum dimension of value A, the maximum dimension in a direction perpendicular to said first-mentioned maximum direction is of a value of approximately (650/900) A and said depression being located at a distance of from between (600/900) A from one end of said diaphragm adjacent one end of the maximum dimension A.
Claim 4
Dependent Claim
122 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, said configuration being of substantially elliptical shape having in at least one peripheral portion thereof, a concave curvilinear depression and in which on the basis of a maximum dimension of value A, the maximum dimension in a direction perpendicular to said first-mentioned maximum direction is of a value of approximately (650/900) A and said depression being located at a distance of from between (600/900) A from one end of said diaphragm adjacent one end of the maximum dimension A.
Claim 5
Dependent Claim
80 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, the planar shape being of a distorted curvilinear closed figure and said diaphragm being provided with a substantially oval shape having, in at least one peripheral part thereof, reverse curvature whereby a concave inward depression is formed.
Claim 6
Dependent Claim
80 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, the planar shape being of a distorted curvilinear closed figure and said diaphragm being provided with a substantially oval shape having, in at least one peripheral part thereof, reverse curvature whereby a concave inward depression is formed.
Claim 7
Dependent Claim
80 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, the planar shape being of a distorted curvilinear closed figure and said diaphragm being provided with a substantially elliptical shape having, in at least one peripheral part thereof, reverse curvature whereby a concave inward depression is formed.
Claim 8
Dependent Claim
80 words
In a loudspeaker of the type having a frame and a substantially flat plate diaphragm, the improvement comprising a diaphragm of planar shape having an effective peripheral configuration defining an asymmetric geometric figure, means fixedly clamping said effective peripheral configuration to such frame, the planar shape being of a distorted curvilinear closed figure and said diaphragm being provided with a substantially elliptical shape having, in at least one peripheral part thereof, reverse curvature whereby a concave inward depression is formed.
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |