Patent US4431334A successfully refreshed from Google Patents.
EP0343847A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Retractable antenna
Assignee: Nokia Mobile Phones UK Ltd
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Filing: 1989-05-18
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Granted: —
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Expires: 2009-05-18
Abstract
Abstract A retractable antenna is in the form of a tape (7) which is slidably mounted in a passageway (6). An electrical contact (9) for making connection to the antenna is provided on the rear wall (3) of the passageway. The tape (7) or the passageway (6) or both are shaped so as to form a bend, e.g. a bow, across the width of the tape so that (a) the convex side of the tape confronts the contact (9) and (b) rigidity is imparted to the tape to keep it upright when extended from the passageway. This antenna is slim and lightweight and therefore ideally suited for use with a compact portable radio telephone.
Inventors
- 👤 Nils Erik Vilhelm Martensson
- 👤 Michael Brian Ashdown
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 21:45
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/08; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/244
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
An antenna assembly comprising an antenna support and an antenna retractably mounted on said support, the antenna being in the form of a tape, the support defining a passageway in which the tape is slidably received, and contact means for making a connection to the antenna being provided on the support in the passageway, wherein the tape, or the passageway, or both are shaped so as to impose a bend transversely across the tape at least in the region of the contact means such that the convex side of the tape confronts the contact means and rigidity is imparted to the tape when extended from the passageway.
Claim 2
Dependent Claim
107 words
An antenna assembly comprising an antenna support and an antenna retractably mounted on said support, the antenna being in the form of a tape, the support defining a passageway in which the tape is slidably received, and contact means for making a connection to the antenna being provided on the support in the passageway, wherein the tape, or the passageway, or both are shaped so as to impose a bend transversely across the tape at least in the region of the contact means such that the convex side of the tape confronts the contact means and rigidity is imparted to the tape when extended from the passageway.
Claim 3
Dependent Claim
18 words
An antenna assembly as claimed in claim 1, wherein the contact means are resiliently biased against the antenna.
Claim 4
Dependent Claim
57 words
An antenna assembly as claimed in claim 1 or claim 2, wherein the passageway has at least one dimension which tends to distort the cross-section of the tape either to provide for self-retention of the tape in the passageway, and/or to impart rigidity to the tape when extended, and/or to urge the tape against the contact means.
Claim 5
Dependent Claim
71 words
An antenna assembly as claimed in any preceding claim, wherein the contact means is disposed locally adjacent the end of the passageway from which the antenna is extendible and the antenna is provided with an insulating coating, a window being present in the coating on the convex side of the antenna adjacent one end thereof to permit the contact means to make the antenna connection when the antenna is fully extended.
Claim 6
Dependent Claim
45 words
An antenna assembly as claimed in claim 4, wherein a further window is provided in the coating on the convex side of the antenna adjacent the opposite end thereof to permit the contact means to make the antenna connection when the antenna is fully retracted.
Claim 7
Dependent Claim
36 words
An antenna assembly as claimed in any preceding claim, wherein means are provided for engaging the tape at a predetermined position or positions along its length to positively locate the tape at a predetermined extended position.
Claim 8
Dependent Claim
41 words
An antenna assembly as claimed in any preceding claim, wherein the passageway is adapted to impose along its length a gradually increasing curvature of the bend in the tape towards the end of the passageway from which the antenna is extendible.
Claim 9
Dependent Claim
33 words
A radio having a main casing and incorporating the antenna assembly according to any preceding claim, said passageway being defined by walls which are either integral with or attached to said main casing.
Claim 10
Dependent Claim
34 words
A radio as claimed in claim 8 wherein the passageway is adapted to bend the antenna in the length direction around the profile of the casing when the antenna is or is being retracted.
Claim 11
Dependent Claim
74 words
A radio as claimed in claim 8 or claim 9, wherein one or more switching means is provided in, or adjacent, said passageway for detecting the position of an antenna slideably received in said passageway, the radio also incorporating an internal antenna and the switching means being operable to connect either said slidable antenna, or said internal antenna to a circuit of the radio depending on the extent of said antenna from said passageway.
References Cited (Backward Citations)
No citation records indexed.
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