Earphone construction

Claim 2

Earphone construction to be worn on the head of the listener comprising a tubular shaped member forming an axially extending passageway having a first end and a second end spaced apart in the axial direction of said passageway, a first opening formed in the tubular member into said passageway and spaced between and from said first and second ends, said first opening arranged to be placed next to the listener's ear, and a sound source located in said passageway and spaced in the axial direction thereof from said first opening, said sound source being positioned in said passageway for directing the sound in the general direction of the axis of the passageway so that the sound travels across said first opening into said passageway.

Claim 3

Earphone construction, as set forth in claim 1, wherein said tubular member is bent into a U-shaped configuration arranged to fit around the head of a listener, said U-shaped tubular member consisting of a pair of legs and a bight portion interconnecting one end of each of said legs with a centerline extending through said legs and said bight portion, said passageway extending for the centerline length of said U-shaped member and having a portion thereof in each of said legs with a connecting portion in said bight portion, the first end of said passageway located at the end of one of said legs spaced along the centerline from said bight portion and the second end of said passageway at the end of the other one of said legs spaced along the centerline therein from said bight portion, the one of said legs having said first opening spaced between its ends, and the other of said legs having a second opening spaced between its ends and arranged to be placed next to the other one of the listener's ears and one sound source located in each of said legs with said sound source in one of said legs being located between said first opening therein and the end of said leg spaced from said bight portion and said sound source in the other of said legs being located between said second opening at the end of the other of said legs spaced from said bight portion.

Claim 4

Earphone construction, as set forth in claim 2, wherein said first opening in one of said legs and said second opening in the other of said legs are disposed in aligned relationship so that a line passing through the center of said first and second openings extends transversely of the portions of said passageway extending through said legs, and each portion of the centerline of said passageway extending through said legs is disposed at an oblique angle to the line passing through said first and second openings.

Claim 5

Earphone construction, as set forth in claim 3, wherein said sound sources are located at the ends of said legs spaced from said bight portion.

Claim 6

Earphone construction, as set forth in claim 2, wherein a damper is mounted in the portion of said passageway extending through said bight portion and said damper is displaceable between a closed position closing said passageway and a multiplicity of open positions for varying the extent of the opening through the portion of said passageway in said bight portion.

Claim 7

Earphone construction, as set forth in claim 2, wherein at least one wall extends transversely across the portion of said passageway in said bight portion and divides said passageway into two separate sub-passageways each containing one said sound source.

Claim 8

Earphone construction, as set forth in claim 6, wherein an additional said sound source is positioned on each side of said wall in the portion of said passageway in said bight portion so that each sub-passageway includes two said sound sources one at each of the opposite ends of said sub-passageways.

Claim 9

Earphone construction, as set forth in claim 2, wherein the surface of said passageway containing said first opening and the surface of said passageway containing said second opening are each in diverging relation to the surface of said passageway opposite thereto across the centerline of said tubular shaped member.

Claim 10

Earphone construction, as set forth in claim 2, wherein said sound sources are located at the ends of said legs spaced from said bight portion, and said U-shaped member at the opposite ends of said legs from said sound sources being perforated for forming sound outlet openings.

Claim 11

Earphone construction, as set forth in claim 2, wherein said legs are telescopically extendable.

Claim 12

Earphone construction, as set forth in claim 1, wherein said tubular shaped member is bent into a U-shaped configuration arranged to fit around the head of a listener, said U-shaped member consisting of a pair of legs and a bight portion interconnecting one end of each of said legs with a centerline extending through said legs and said bight portion, said passageway extending for the centerline length of said U-shaped member and having a portion thereof in each of said legs with a connecting portion within said bight portion joining the portions in each of said legs, the first end of said passageway located at the end of one of said legs spaced from said bight portion and the second end of said passageway located at the end of the other of said legs spaced from said bight portion, one of said legs having said first opening spaced between its ends and the other one of said legs having a second opening therein spaced between the ends thereof and arranged to be placed next to the other one of the listener's ears and one said sound source located in said passageway at each of the intersections of said legs and said bight portion with said sound sources positioned to direct the sound toward the opposite end of the leg with which it is associated.

Claim 13

Earphone construction, as set forth in claim 11, wherein the transverse cross section of the portion of said passageway through said bight portion increases from the midpoint thereof between said legs toward the intersections with said legs.

Claim 14

Earphone construction, as set forth in claim 11, wherein said U-shaped member at the opposite ends of said legs from said sound sources being perforated to form sound outlet openings.

Claim 15

Earphone construction, as set forth in claim 11, wherein said legs are telescopically extendable.

Claim 16

Earphone construction, as set forth in claim 1, wherein said tubular shaped member is bent into a U-shaped configuration arranged to fit around the head of a listener, said U-shaped member consisting of a pair of legs and a bight portion interconnecting one end of each of said legs with a centerline extending through each of said legs and said bight portion, said passageway extending for the centerline length of said U-shaped member and having a portion thereof in each of said legs and in said bight portion, the first end of said passageway located at the end of one of said legs spaced from said bight portion and the second end of said passageway located at the end of the other of said legs spaced from said bight portion, said one of said legs having said first opening spaced from its ends, the other of said legs having a second opening spaced between the ends thereof and arranged to be placed next to the other one of the listener's ears, at least one wall located within and extending transversely across said passageway within said bight portion between said legs and dividing said passageway into a pair of sub-passageways, one said sound source located within each of said sub-passageways and mounted on said wall located within said bight portion, each said sound source positioned to direct sound in the centerline direction of said sub-passageway within which it is located.

Claim 17

Earphone construction, as set forth in claim 15, wherein said legs are telescopically extendable.

Claim 18

Earphone construction, as set forth in claim 1, wherein said sound source is pivotally mounted in said passageway for selectively directing the sound from said sound source within said passageway.

Claim 19

Earphone construction, as set forth in claim 17, wherein said sound source is pivotally movable in said passageway about an axis extending transversely of the axis of said passageway through an angular range greater than 90°.

Claim 20

Earphone construction, as set forth in claim 1, wherein said sound source is located at said first end of said passageway and positioned for directing sound along the axis of said passageway, said tubular member being closed at the first and second ends of said passageway and said closed second end of said tubular member being perforated to form sound outlet openings.

Claim 21

Earphone construction, as set forth in claim 1, wherein one said sound source is located at each of said first end and said second end of said passageway and is positioned for directing sound along the axis of said passageway, said tubular member being closed at said first and second ends of said passageway, and said first and second ends of said tubular member being perforated to form sound outlet openings.

Claim 22

Earphone construction, as set forth in claim 1, wherein said tubular shaped member comprises a first tubular shaped section and a second tubular shaped section with said first and second tubular shaped sections being telescopically fitted together with one said sound source located within each of said first and second tubular shaped sections.

Claim 23

Earphone construction, as set forth in claim 1, wherein said tubular shaped member has a second opening formed therein which opening is spaced in the axial direction of said member from said first opening, and said sound source being removably mounted in said opening.

Claim 24

Earphone construction, as set forth in claim 22, wherein said tubular shaped member is formed of a resilient material so that said second opening defined by said resilient material can hold said sound source in form-fitting engagement.

Claim 25

Earphone construction, as set forth in claim 1, wherein said sound source is fitted into said first end of said tubular shaped member, and perforations formed through said tubular shaped member in a position located adjacent said second end of said tubular shaped member and on the opposite side of said first opening from said first end of said first tubular shaped member.

Claim 26

Earphone construction, as set forth in claim 24, wherein said sound source is positioned in said tubular shaped member for directing sound therefrom substantially perpendicularly to said first opening.