US3919501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headphone construction
Assignee: AKG Acoustics GmbH
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Filing: 1974-05-21
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Granted: 1975-11-11
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Expires: 1994-05-21
Abstract
Abstract A headphone comprises an earphone for each ear, a first inner headband forming a flat large diameter curve extending between the earphones and adapted to engage against the top of the wearer''s head during use, and a second headband of a smaller diameter curve than the first headband, extending between each side of the wearer''s head and connected adjacent each end to the first headband. An elastic suspension extends between the connection of the first and second bands to the respective earphones, and the elastic suspension acts upwardly preferably by an amount equal to the weight of each earphone.
Inventors
- 👤 Karl Cech
- 👤 Karl Reinthaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:10
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1058; H04R1/1066; H04R1/1008; H04R5/00; H04R5/033; H04R5/0335
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
A headphone construction comprising two earpieces, at least one head band interconnecting said two earpieces and adapted to rest during use by its middle portion against the top of the user''s head, the connection of said two earpieces to said headband including a resilient suspension holding the earpieces adjacent the ends of said band, said resilient suspension comprising a resilient member having a spring force slightly stronger than the effective gravitational force on said earpieces.
Claim 2
Dependent Claim
75 words
A headphone construction comprising two earpieces, at least one head band interconnecting said two earpieces and adapted to rest during use by its middle portion against the top of the user''s head, the connection of said two earpieces to said headband including a resilient suspension holding the earpieces adjacent the ends of said band, said resilient suspension comprising a resilient member having a spring force slightly stronger than the effective gravitational force on said earpieces.
Claim 3
Dependent Claim
83 words
A headphone comprising an earphone for each ear, a first outer curved headband having a first radius of curvature and extending between said earphones, a second inner curved head band forming a flat curve having a second radius of curvature smaller than said first radius of curvature and connected to each end of said first headband, and an elastic suspension connected to the ends of said second inner headband and to each earphone and providing an upwardly acting resilient suspension of said earphones.
Claim 4
Dependent Claim
83 words
A headphone comprising an earphone for each ear, a first outer curved headband having a first radius of curvature and extending between said earphones, a second inner curved head band forming a flat curve having a second radius of curvature smaller than said first radius of curvature and connected to each end of said first headband, and an elastic suspension connected to the ends of said second inner headband and to each earphone and providing an upwardly acting resilient suspension of said earphones.
Claim 5
Dependent Claim
43 words
A headphone according to claim 2, wherein said second inner headband is adapted to rest against the head of the wearer and said first outer headband is resilient and each end is biased inwardly toward the connection thereto of said second inner headband.
Claim 6
Dependent Claim
56 words
A headphone according to claim 2, wherein said second inner headband rests against the head of the wearer and said first outer headband extends outwardly from the head of the wearer and is not in contact therewith, said resilient suspension comprising resilient elements extending from the ends of said second inner headband to the respective earpieces.
Claim 7
Dependent Claim
48 words
A headphone according to claim 4, wherein each of said headpieces includes a coupling, said inner and outer headbands being connected together adjacent each of their respective ends and said elastic suspension comprising a band extending from the connection of said first and second headbands to said coupling.
Claim 8
Dependent Claim
16 words
A headphone according to claim 2, wherein said second inner headband comprises a flexible extensible band.
Claim 9
Dependent Claim
29 words
A headphone according to claim 2, wherein said first outer headband is resilient and applies force inwardly in a direction substantially normal to the resilient suspension of said earpieces.
Claim 10
Dependent Claim
43 words
A headphone according to claim 2, wherein said first outer headband comprises a pair of spaced apart wires, said second inner band being in contact with a person''s head and being made of a thin flexible sheet possessing only a small elastic force.
Claim 11
Dependent Claim
98 words
A headphone according to claim 2, including a coupling member connected to each of said earpieces, said resilient suspension being connected between said coupling member and said first outer headband, said first outer headband comprising two spaCed apart wire members, a connecting pin connected between said wire members and holding said suspension, a block piece spaced from said connecting member and connected between said two wires and having a pin member, said second inner band having a slot therein in which said pin is engaged to permit relative movement of said inner band relative to said outer band.
Claim 12
Dependent Claim
19 words
A headphone according to claim 9, wherein said wire members comprise two steel wires coated with a synthetic material.
References Cited (Backward Citations)
US3306991A
Cited
US3447160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |