US3779336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm for sound transducers, method and apparatus for manufacturing it
Assignee: Individual
•
Filing: 1972-06-27
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Granted: 1973-12-18
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Expires: 1992-06-27
Abstract
Abstract Diaphragm for sound transducers and a method for manufacturing it, including providing a cellular plate-like member molded of granular starting material and defining a provisional flat front face and a rear face. A layer including said provisional flat front face is heat severed from the plate-like member, whereby a new concavely shaped front face and plate-like member is defined, where the contiguous severed cells become sealed in themselves and sealed together at the same time as they are subject to stresses and provide a hardened surface. Preferably a sheet-like member is adhered to the new front face and the curved plate-like member is then urged into substantially planar condition, whereby the sheet-like member becomes stressed and the severed cells of the new front face are subject to additional stresses, so that the resulting diaphragm has a flat front face under a higher stress than the successive cells defining said diaphragm from said front face towards said rear face, the stresses progressively decreasing from said front face towards said rear face. The invention relates also to an apparatus for severing the layer including said provisional front face, from the rest of the plate-like member.
Inventors
- 👤 J Bertagni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:59
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A diaphragm to be used in sound transducers, comprising a strong, stiff, plastics plate-like member formed by a continuous structure of cells and having a sealed front face, a rear face and side faces connecting said front and rear faces, the cells defining said front face being under a higher stress than the successive cells defining said diaphragm from said front face towards said rear face, the stresses progressively decreasing from said front face towards said rear face, and the surface defining saiD front face being a hardened skin-like surface integral with said plate-like member and sealing said front face, said skin-like surface having been obtained by heat severing.
Claim 2
Dependent Claim
109 words
A diaphragm to be used in sound transducers, comprising a strong, stiff, plastics plate-like member formed by a continuous structure of cells and having a sealed front face, a rear face and side faces connecting said front and rear faces, the cells defining said front face being under a higher stress than the successive cells defining said diaphragm from said front face towards said rear face, the stresses progressively decreasing from said front face towards said rear face, and the surface defining saiD front face being a hardened skin-like surface integral with said plate-like member and sealing said front face, said skin-like surface having been obtained by heat severing.
Claim 3
Dependent Claim
16 words
The diaphragm of claim 1, wherein said heat severed and sealed front face is concavely shaped.
Claim 4
Dependent Claim
43 words
The diaphragm of claim 1, wherein said front face is substantially planar, said diaphragm being a substantially flat diaphragm, and including a tensioned sheet-like member adhered to said front face and a frame for said diaphragm, said diaphragm being connected to said frame.
Claim 5
Dependent Claim
34 words
The diaphragm of claim 3, wherein said sheet-like member is also adhered to said side faces and said frame supports and maintains said diaphragm in substantially flat position with the substantially straight front face.
Claim 6
Dependent Claim
95 words
The diaphragm of claim 4, wherein said rear face defines a marginal vibration damping portion circumscribing a pinna of the human ear shaped figure portion, said figure portion including a central portion which is stiffer than the remainder of the figure portion and which is located within a zone of the figure portion which is out of the geometric center thereof, said stiffer portion forming a center for collecting vibrations and an endless channel having a bottom wall adjacent said front face connecting the periphery of said figure portion with said marginal vibration damping portion.
Claim 7
Dependent Claim
42 words
The diaphragm of claim 1, wherein said front face is substantially planar, said diaphragm being a substantially flat diaphragm, and including a sheet-like member adhered to said front face and a frame for said diaphragm, said diaphragm being connected to said frame.
Claim 8
Dependent Claim
57 words
The diaphragm of claim 1, wherein said front face is substantially planar, said diaphragm being a substantially flat diaphragm, and including a sheet-like member in front of said front face and a frame, said sheet-like member being supported by said frame, said diaphragm being connected to said frame and arranged beneath said sheet-like member in said frame.
Claim 9
Dependent Claim
64 words
The diaphragm of claim 1, wherein said rear face defines a marginal vibration damping portion circumscribing a figure portion, said figure portion including a central portion which is stiffer than the remainder of the figure portion and which is located within a zone of the figure portion which is out of the geometric center thereof, said stiffer portion forming a center for collecting vibrations.
Claim 10
Dependent Claim
35 words
The diaphragm of claim 8, wherein said rear face includes an endless channel having a bottom wall adjacent said front face and connecting the periphery of said figure portion of said marginal vibration damping portion.
Claim 11
Dependent Claim
18 words
The diaphragm of claim 8, wherein said front face is substantially planar, thereby defining a substantially flat diaphragm.
Claim 12
Dependent Claim
18 words
The diaphragm of claim 9, wherein said front face is substantially planar, thereby defining a substantially flat diaphragm.
References Cited (Backward Citations)
US1821373A
Cited
US3596733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |