US3789418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible antenna formed of opposed convex laminated strips covered with a heat-shrunk hose
Assignee: International Standard Electric Corp
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Filing: 1972-10-25
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Granted: 1974-01-29
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Expires: 1992-10-25
Abstract
Abstract This invention relates to a laminated antenna for portable radio sets which can be bent or buckled. The antenna lamination consists of two longitudinally staggered groups of transversely cambered steel strips. These strip groups are so disposed in a mirror-inverted arrangement that a biconvex cross section is obtained. Firmly interconnected only at the base of the antenna through a holder, the entire arrangement is covered with a heatshrunk hose. The biconvex arrangement of the steel strips results in a rigidity equal in both directions of bending. The covering provides protection against atmospheric influences, contamination and injuries and prevents reflections of light.
Inventors
- 👤 H Reiber
- 👤 R Stapelfeldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:08
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/084; H01Q1/085; H01Q1/12; H01Q1/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A bendable and buckling laminated antenna of the type having a plurality of layers of hollow steel strips of different length positively interconnected at the base through a holder, comprising the antenna lamination including a pair of longitudinally staggered groups of hollow steel strips, said pair of groups being disposed in a mirror-inverted arrangement to obtain a biconvex cross section, said pair of strip groups being interconnected only at the base via the holder, the arrangement of the steel strips and the holder being provided with a closefitting, hose-like covering.
Claim 2
Dependent Claim
90 words
A bendable and buckling laminated antenna of the type having a plurality of layers of hollow steel strips of different length positively interconnected at the base through a holder, comprising the antenna lamination including a pair of longitudinally staggered groups of hollow steel strips, said pair of groups being disposed in a mirror-inverted arrangement to obtain a biconvex cross section, said pair of strip groups being interconnected only at the base via the holder, the arrangement of the steel strips and the holder being provided with a closefitting, hose-like covering.
Claim 3
Dependent Claim
39 words
The laminated antenna according to claim 1 wherein the length of the hollow steel strips increases from the inside toward the outside, and wherein all steel strips are of different length with the exception of the outer steel strips.
Claim 4
Dependent Claim
20 words
The laminated antenna according to claim 2 wherein the outer, or equally long additional, hollow steel strips are loosely added.
Claim 5
Dependent Claim
21 words
The laminated antenna according to claim 1 wherein the free end of the steel strips is provided with a protective cap.
Claim 6
Dependent Claim
42 words
The laminated antenna according to claim 1 wherein the covering is a heat-shrunk hose reinforced at the longitudinal edges and which rises above the free end of the outer steel strips, and which is fixedly joined together to form an elastic tongue.
Claim 7
Dependent Claim
18 words
The laminated antenna according to claim 5 wherein the inside of the covering is provided with a lubricant.
Claim 8
Dependent Claim
38 words
A self-erecting antenna comprising a pair of longitudinally staggered groups of hollow strips arranged to have a biconvex cross-section and means for interconnecting said strips at least at one end and enclosing said strips within a continuous sheath.
Claim 9
Dependent Claim
38 words
A self-erecting antenna comprising a pair of longitudinally staggered groups of hollow strips arranged to have a biconvex cross-section and means for interconnecting said strips at least at one end and enclosing said strips within a continuous sheath.
Claim 10
Dependent Claim
22 words
The antenna according to claim 7 wherein said means includes a holder interconnecting said groups at the base of the antenna only.
Claim 11
Dependent Claim
59 words
A self-erecting laminated antenna capable of being twisted or flexed in any direction from the normal comprising an antenna lamination arrangement including a pair of longitudinally staggered groups of hollow strips disposed in mirror-inverted arrangement to provide a biconvex cross-section, said pair of groups being interconnected at one end and arranged to be enclosed in a nonconductive continuous sheath.
Claim 12
Dependent Claim
59 words
A self-erecting laminated antenna capable of being twisted or flexed in any direction from the normal comprising an antenna lamination arrangement including a pair of longitudinally staggered groups of hollow strips disposed in mirror-inverted arrangement to provide a biconvex cross-section, said pair of groups being interconnected at one end and arranged to be enclosed in a nonconductive continuous sheath.
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |