US4432193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of grading radiating transmission lines
Assignee: Senstar Corp
•
Filing: 1982-09-20
•
Granted: 1984-02-21
•
Expires: 2002-09-20
Abstract
Abstract A method of manufacturing leaky coaxial cable by winding conductive tapes around a core to provide apertures of a certain shape, number and density. By varying the width of one or both tapes the aperture distribution is varied thereby altering the coupling of the cable when used in a detection system. A graded cable showing such varying coupling can be used to compensate for cable attenuation losses and other variables.
Inventors
- 👤 Melvin C. Maki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:47
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/203; H01P; H01P11/00; H01P11/001; H01P11/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A method of manufacturing a leaky coaxial cable comprising the steps of: providing a core having an inner conductor or conductors surrounded by a dielectric layer; winding at least two conductive tapes therearound, the tape widths and pitch angles being initially selected to provide predetermined coupling and attenuation characteristics; varying the tape width of at least one of the conductive tapes along the cable length to vary said coupling and attenuation.
Claim 2
Independent Claim
71 words
A method of manufacturing a leaky coaxial cable comprising the steps of: providing a core having an inner conductor or conductors surrounded by a dielectric layer; winding at least two conductive tapes therearound, the tape widths and pitch angles being initially selected to provide predetermined coupling and attenuation characteristics; varying the tape width of at least one of the conductive tapes along the cable length to vary said coupling and attenuation.
Claim 3
Dependent Claim
38 words
A method as set out in claim 1, wherein the tapes are wound to provide apertures of predetermined shape and number and having a total area which is a predetermined fraction of the surface area of the cable.
Claim 4
Dependent Claim
23 words
A method as set out in claim 1 or 2, wherein two tapes are used and their widths and pitch angle are different.
Claim 5
Dependent Claim
14 words
A method as set out in claim 1, wherein the tapes are solid conductors.
Claim 6
Dependent Claim
14 words
A method as set out in claim 1, wherein the tapes are braided conductors.
Claim 7
Dependent Claim
25 words
A method as set out in claim 1, wherein one of the tapes is solid conductor and another of the tapes is a woven conductor.
Claim 8
Dependent Claim
20 words
A method as set out in claim 4, 5 or 6, wherein the widths of the tapes are stepwise tapered.
Claim 9
Dependent Claim
19 words
A method as set out in claim 1 or 4 wherein the widths of the tapes are continuously tapered.
Claim 10
Dependent Claim
31 words
A method as set out in claim 5 or 6 wherein the wires in at least one of the woven conductors is periodically cut or tied off in the manufacturing process.
Claim 11
Dependent Claim
24 words
A method as set out in claim 1, including the further step of varying the pitch angle of at least one of the tapes.
References Cited (Backward Citations)
US3756004A
Cited
US3949329A
Cited
US3870977A
Cited
US4322699A
Cited
GB2031654A
Cited
US4300338A
Cited
US4325039A
Cited
US4339733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |