Patent US4792971A successfully refreshed from Google Patents.
Patent US3794779A successfully refreshed from Google Patents.
US3794779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headphones for reproducing four-channel sound
Assignee: Individual
•
Filing: 1971-08-23
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Granted: 1974-02-26
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Expires: 1991-08-23
Abstract
Abstract Each headphone casing encloses forwardly and rearwardly extending, segregated, acoustic mixing chambers segregated by a generally vertical partition and opening inwardly through a common, generally central opening to an ear of the person wearing the headphones. The headphone segregated mixing chambers preferably have specifically contoured walls with a sound emitting device in each mixing chamber directed at least partially against said walls for a proper sound mixing in each mixing chamber and the headphones central openings are of appropriate various sizes and depth for at least fully receiving the persons ear with acoustic integrating chambers of various sizes formed by the central openings adjacent the ears and simultaneously communicating with each of the segregated mixing chambers. Thus, with one channel of four-channel sound directed into each of the mixing chambers of a set of the earphones, the full effect of four-channel sound is received, and by similar connection of stereophonic sound, many of the four-channel sound effects are reproduced from the stereophonic sound.
Inventors
- 👤 C Greuzerd
- 👤 L Henkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:11
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1058; H04R1/1075; H04R5/00; H04R5/02; H04R5/033; H04R1/1041; H04R2205/00; H04R2205/022
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
106 words
In a headphone construction, the combination of: a main generally hollow casing having a generally central opening at an inner side positionable at an ear of a person, said casing enclosing forwardly and rearwardly extending segregated acoustic mixing chambers separated by a portion of said casing and each opening through said casing central opening; and a sound emitting device in each of said mixing chambers positioned directing sound into the respective of said mixing chambers, said sound emitting devices in each of said mixing chambers being principally directed toward walls of said respective mixing chambers formed by said portion of said casing separating said mixing chambers.
Claim 2
Dependent Claim
106 words
In a headphone construction, the combination of: a main generally hollow casing having a generally central opening at an inner side positionable at an ear of a person, said casing enclosing forwardly and rearwardly extending segregated acoustic mixing chambers separated by a portion of said casing and each opening through said casing central opening; and a sound emitting device in each of said mixing chambers positioned directing sound into the respective of said mixing chambers, said sound emitting devices in each of said mixing chambers being principally directed toward walls of said respective mixing chambers formed by said portion of said casing separating said mixing chambers.
Claim 3
Dependent Claim
37 words
The headphone construction as defined in claim 1 in which said casing central opening forming an acoustic integrating chamber between said mixing chambers and said ear inwardly of said portion of said casing separating said mixing chambers.
Claim 4
Dependent Claim
42 words
The headphone construction as defined in claim 1 in which each of said mixing chambers in extension thereof outwardly and forwardly and rearwardly from said casing inner side is generally ovoidal in horizontal cross section and generally ellipsoidal in vertical cross section.
Claim 5
Dependent Claim
136 words
In a headphone construction, the combination of: a main casing having a generally vertical partition separating said casing into forward and rearward acoustic mixing chambers, said casing being adapted for positioning with a casing inner side against the head of a person covering an ear and with said partition at said ear, said casing and said partition forming walls defining said chambers; said forward mixing chamber opening through said casing forwardly of said partition to said ear; said rearward mixing chamber opening through said casing rearwardly of said partition to said ear; and a sound emitting device in each of said mixing chambers directing sound into the respective one of said mixing chambers, said sound emitting devices in each of said mixing chambers being principally directed toward walls of said respective chambers formed by said partition.
Claim 6
Dependent Claim
136 words
In a headphone construction, the combination of: a main casing having a generally vertical partition separating said casing into forward and rearward acoustic mixing chambers, said casing being adapted for positioning with a casing inner side against the head of a person covering an ear and with said partition at said ear, said casing and said partition forming walls defining said chambers; said forward mixing chamber opening through said casing forwardly of said partition to said ear; said rearward mixing chamber opening through said casing rearwardly of said partition to said ear; and a sound emitting device in each of said mixing chambers directing sound into the respective one of said mixing chambers, said sound emitting devices in each of said mixing chambers being principally directed toward walls of said respective chambers formed by said partition.
Claim 7
Dependent Claim
55 words
The headphone construction as defined in claim 4 in which said sound emitting device in said forward mixing chamber is at a forward extremity of said forward mixing chamber directed rearwardly; and in which said sound emitting device in said rearward mixing chamber is at a rearward extremity of said rearward mixing chamber directed forwardly.
Claim 8
Dependent Claim
38 words
The headphone construction as defined in claim 4 in which said forward and rearward mixing chambers communicate through said casing inner side through an acoustic integrating chamber in said casing inwardly of an inner termination of said partition.
Claim 9
Dependent Claim
34 words
The headphone construction as defined in claim 4 in which said walls of said forward and rearward mixing chambers outwardly of said casing inner side including said partition are arcuate in horizontal cross section.
Claim 10
Dependent Claim
34 words
The headphone construction as defined in claim 4 in which said walls of said forward and rearward mixing chambers outwardly of said casing inner side including said partition are arcuate in vertical cross section.
Claim 11
Dependent Claim
37 words
The headphone construction as defined in claim 4 in which said walls of said forward and rearward mixing chambers outwardly of said casing inner side including said partition are arcuate in both vertical and horizontal cross section.
Claim 12
Dependent Claim
35 words
The headphone construction as defined in claim 4 in which said walls of said forward and rearward mixing chambers outwardly of said casing inner side including said partition are generally ellipsoidal in vertical cross section.
Claim 13
Dependent Claim
35 words
The headphone construction as defined in claim 4 in which said walls of said forward and rearward mixing chambers outwardly of said casing inner side including said partition are generally ovoidal in horizontal cross section.
Claim 14
Dependent Claim
73 words
The headphone construction as defined in claim 4 in which said walls of said forward and rearward Mixing chambers outwardly of said casing inner side including said partition are generally ellipsoidal in vertical cross section and generally ovoidal in horizontal cross section, said mixing chamber ovoidal horizontal cross sections having maximum outward dimensions at locations lesser horizontal distances from said casing partition than horizontal midpoint distances of said mixing chambers from said partition.
Claim 15
Dependent Claim
34 words
The headphone construction as defined in claim 4 in which similar arcuate protrusions are formed principally on said casing partition projecting principally from said partition into each of said forward and rearward mixing chambers.
Claim 16
Dependent Claim
94 words
The headphone construction as defined in claim 4 in which similar arcuate protrusions are formed principally on said casing partition projecting into each of said forward and rearward mixing chambers principally from said partition, said forward mixing chamber protrusion projecting principally from said partition generally toward said forward mixing chamber forward extremity, said rearward mixing chamber protrusion projecting principally from said partition generally toward said rearward mixing chamber rearward extremity, said forward and rearward mixing chamber protrusions in projection principally from said casing partition being generally ellipsoidal in both vertical and horizontal cross section.
Claim 17
Dependent Claim
86 words
The headphone construction as defined in claim 4 in which similar arcuate protrusions are formed principally on said casing partition projecting into each of said forward and rearward mixing chambers principally from said partition, said forward mixing chamber protrusion projecting principally from said partition, generally toward said forward mixing chamber forward extremity, said rearward mixing chamber protrusion projecting principally from said partition generally toward said rearward mixing chamber rearward extremity; said forward and rearward mixing chamber protrusions covering major portions of walls of said casing partition.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |