US4029911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-acoustic transducer and method of manufacturing such a transducer
Assignee: US Philips Corp
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Filing: 1976-04-28
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Granted: 1977-06-14
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Expires: 1996-04-28
Abstract
Abstract An electro-acoustic transducer having a chassis with a plastic contact surface for attachment of a vibratory diaphragm. The diaphragm is attached by an ultrasonic weld between the contact surface on the chassis and the edge of the vibratory part.
Inventors
- 👤 Walter Albinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; B; B29; B29C; B29C65/00; B29C65/02; B29C65/08; B29C65/78; B29C65/7802; B29C65/7805; B29C65/7808; B29C65/7811; B29C65/7841; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/131; B29C66/1312; B29C66/50; B29C66/51; B29C66/54; B29C66/543; B29C66/545; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81415; B29C66/81427; B29C66/81431; B29C66/816; B29C66/8161; B29C66/83; B29C66/832; B29C66/8322; H04R31/00; H04R31/006; H04R9/00; H04R9/02; H04R9/04; H04R9/041; B29C66/70; B29C66/71; B29C66/81421; B29C66/81423; B29L; B29L2031/00; B29L2031/34; B29L2031/3418; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
41 words
An electro-acoustic tranducer comprising a chassis having a contact surface, and a vibratory diaphragm having an edge, wherein said contact surface is formed of a plastic material, and said vibratory diaphragm is attached to the contact surface by an ultrasonic weld.
Claim 2
Dependent Claim
41 words
An electro-acoustic tranducer comprising a chassis having a contact surface, and a vibratory diaphragm having an edge, wherein said contact surface is formed of a plastic material, and said vibratory diaphragm is attached to the contact surface by an ultrasonic weld.
Claim 3
Dependent Claim
17 words
A transducer as claimed in claim 1 wherein said weld is a segmented series of weld strips.
Claim 4
Dependent Claim
52 words
A transducer as claimed in claim 1 wherein said contact surface and said edge each has an area greater than the area covered by the weld, so arranged that a portion of the diaphragm edge extending radially inward from the weld freely engages a portion of the contact surface adjacent the weld.
Claim 5
Independent Claim
81 words
A method of manufacturing an electro-magnetic transducer having a chassis with a contact surface, and a vibratory diaphragm with an edge attached to the chassis, at least the contact surface consisting of a plastic material, comprising the steps of: placing a diaphragm onto a chassis with the diaphragm edge against a plastic contact surface of the chassis, and pressing the radiating surface of an ultrasonic generator against the edge of the diaphragm so as to weld the edge to the plastic.
Claim 6
Independent Claim
81 words
A method of manufacturing an electro-magnetic transducer having a chassis with a contact surface, and a vibratory diaphragm with an edge attached to the chassis, at least the contact surface consisting of a plastic material, comprising the steps of: placing a diaphragm onto a chassis with the diaphragm edge against a plastic contact surface of the chassis, and pressing the radiating surface of an ultrasonic generator against the edge of the diaphragm so as to weld the edge to the plastic.
Claim 7
Dependent Claim
92 words
A method as claimed in claim 4, for attaching a diaphragm to a transducer chassis having a magnet system with a central core adapted for use with a moving coil diaphragm having a central hole adapted to fit over said core, comprising the steps of: coaxially positioning an assembly of said chassis having a central core with respect to said generator, then aligning an assembly of the moving coil and diaphragm with respect to the generator by engaging said central with a cylindrical projection on the generator, prior to said pressing step.
Claim 8
Dependent Claim
102 words
A method as claimed in claim 4, wherein said moving coil diaphragm is an assembly of a moving coil and a centering ring, and said chassis has a plastic second contact area adapted for attachment of a second diaphragm, comprising in addition the subsequent steps of: placing a second diaphragm on the moving coil diaphragm and centering the second diaphragm with respect to the moving coil diaphragm, gluing the second diaphragm to the moving coil diaphragm, and pressing the radiating surface of a second ultrasonic generator against the edge of the second diaphragm to weld the edge to the second contact surface.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |