US4429194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earphone
Assignee: Sony Corp
•
Filing: 1981-06-03
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Granted: 1984-01-31
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Expires: 2001-06-03
Abstract
Abstract An earphone comprising a housing formed on the outer periphery of the front face with a flange for preventing the housing from disengagement from the concha when the housing is received in a recess of the concha, said housing being sized to be received in the recess of the concha and having an electroacaustic transducer built in.
Inventors
- 👤 Yoshoyuki Kamon
- 👤 Yoshihiro Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:13
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/20; H04R1/22; H04R1/225; H04R1/1016; H04R1/105
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
An earphone comprising a housing formed so as to be received in a recess of the concha, a magnetic circuit received in said housing, a diaphragm magnetically coupled to said magnetic circuit and with a diameter substantially equal to said housing and a flange formed around said housing for engaging lugs of the concha when said housing is received in the concha and wherein a protector having a plurality of openings is mounted on said flange to protect said diaphragm.
Claim 2
Dependent Claim
80 words
An earphone comprising a housing formed so as to be received in a recess of the concha, a magnetic circuit received in said housing, a diaphragm magnetically coupled to said magnetic circuit and with a diameter substantially equal to said housing and a flange formed around said housing for engaging lugs of the concha when said housing is received in the concha and wherein a protector having a plurality of openings is mounted on said flange to protect said diaphragm.
Claim 3
Dependent Claim
17 words
An earphone as defined in claim 1, wherein said flange is provided with a plurality of openings.
Claim 4
Dependent Claim
38 words
An earphone as defined in claim 1, wherein said housing has a flexible string member secured thereto and carrying a pair of magnetically attracting sandwiching pieces for sandwiching said concha and maintaining the housing secured to the concha.
Claim 5
Dependent Claim
30 words
An earphone as defined in claim 3, wherein at least one of said pair of sandwiching pieces is a permanent magnet and the other piece is formed of magnetic material.
Claim 6
Dependent Claim
20 words
An earphone as defined in claim 1, wherein said housing is provided on its back side with a buffer member.
References Cited (Backward Citations)
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Cited
US2975244A
Cited
US3293379A
Cited
US3586794A
Cited
US3565073A
Cited
US4258705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |