Patent US5092807A successfully refreshed from Google Patents.
US3797104A
Expired / Lapsed
US
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Flexible coaxial cable and method of making same
Assignee: Individual
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Filing: 1972-07-13
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Granted: 1974-03-19
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Expires: 1992-07-13
Abstract
Abstract A flexible coaxial cable having an inner conductor to which a dielectric is secured such as by fusion and a convoluted outer conductor formed from a strip helically wound conductor secured, such as by soldering, to a corrugated conductive member, with the helically wound portion being secured to the peaks of the corrugations. The outer conductor is locked to the dielectric by crimping solely in the valleys between the helically wound convolutions. The crimping is accomplished under controlled conditions to provide a predetermined characteristic impedance, such as 50 ohms, for the coaxial cable by means of the mechanical crimping. The crimped cable is temperature cycled in a temperature chamber so as to provide thermal stability for the coaxial cable.
Inventors
- 👤 W Pote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:34
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/0006; H01B11/00; H01B11/18; H01B11/1808; H01B11/183; H01B11/1878; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49004
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
281 words
A method of making a flexible coaxial cable comprising the steps of providing a core for said cable, said core comprising an inner conductive member and dielectric means surrounding said inner conductive member, said inner conductive member being located substantially along the longitudinal axis of said dielectric means, said dielectric means having an outermost radial extent about said longitudinal axis; providing a flexible hollow outer conductive sheath of substantially the same extent as said core, said sheath having a longitudinal axis coextensive with said core longitudinal axis and an innermost radial extent about said longitudinal axis which defines the innermost circumference of said hollow within said sheath, said sheath innermost radial extent being initially larger than said core outermost radial extent, said sheath comprising a corrugated portion having a plurality of peaks and valleys of predetermined pitch and a helically wound conductive strip disposed about said peaks and having a pitch equivalent to said predetermined pitch, said strip being conductively mounted on said peaks, said valleys defining said sheath innermost radial extent, said peak mounted strip defining the sheath outermost radial extent; inserting said core within said sheath until said sheath and said core are substantiaLly coextensive; crimping solely said valleys so as to deform said dielectric means by embedding said valleys in said dielectric means so as to lock said dielectric means to said sheath, said sheath innermost radial extent defined by said valleys after said crimping being less than said core outermost radial extent; and measuring the characteristic impedance of said coaxial cable during said crimping for stopping said crimping when a predetermined value of said characteristic impedance is reached, whereby electrical stability is provided for said flexible cable.
Claim 2
Independent Claim
281 words
A method of making a flexible coaxial cable comprising the steps of providing a core for said cable, said core comprising an inner conductive member and dielectric means surrounding said inner conductive member, said inner conductive member being located substantially along the longitudinal axis of said dielectric means, said dielectric means having an outermost radial extent about said longitudinal axis; providing a flexible hollow outer conductive sheath of substantially the same extent as said core, said sheath having a longitudinal axis coextensive with said core longitudinal axis and an innermost radial extent about said longitudinal axis which defines the innermost circumference of said hollow within said sheath, said sheath innermost radial extent being initially larger than said core outermost radial extent, said sheath comprising a corrugated portion having a plurality of peaks and valleys of predetermined pitch and a helically wound conductive strip disposed about said peaks and having a pitch equivalent to said predetermined pitch, said strip being conductively mounted on said peaks, said valleys defining said sheath innermost radial extent, said peak mounted strip defining the sheath outermost radial extent; inserting said core within said sheath until said sheath and said core are substantiaLly coextensive; crimping solely said valleys so as to deform said dielectric means by embedding said valleys in said dielectric means so as to lock said dielectric means to said sheath, said sheath innermost radial extent defined by said valleys after said crimping being less than said core outermost radial extent; and measuring the characteristic impedance of said coaxial cable during said crimping for stopping said crimping when a predetermined value of said characteristic impedance is reached, whereby electrical stability is provided for said flexible cable.
Claim 3
Dependent Claim
47 words
A method in accordance with claim 1, further comprising the step of temperature cycling said crimped coaxial cable between at least a pair of predetermined temperature extremes for a predetermined period of time at each of said extremes, whereby temperature stability is provided for said flexible cable.
Claim 4
Dependent Claim
35 words
A method in accordance with claim 2, wherein said dielectric means is Teflon and said temperature cycling step comprises cooling said crimped cable at a temperature of substantially -100*C. at one of said temperature extremes.
Claim 5
Dependent Claim
22 words
A method in accordance with claim 3, wherein said cooling step comprises cooling said crimped cable at -100*C. for approximately two hours.
Claim 6
Dependent Claim
30 words
A method in accordance with claim 3, wherein said temperature cycling step comprises heating said crimped cable at a temperature of substantially +225*C. at the other of said temperatures extremes.
Claim 7
Dependent Claim
35 words
A method in accordance with claim 2, wherein said dielectric means is Teflon and said temperature cycling step comprises heating said crimped cable at a temperature of substantially +225*C. at one of said temperature extremes.
Claim 8
Dependent Claim
22 words
A method in accordance with claim 6, wherein said heating step comprises heating said crimped cable at +225*C. for approximately 2 hours.
Claim 9
Dependent Claim
29 words
A method in accordance with claim 2, wherein said method further comprises repeating said crimping step and said temperature cycling step, whereby said electrical and temperature stability are enhanced.
Claim 10
Dependent Claim
28 words
A method in accordance with claim 1, wherein said method further comprises the step of stopping said crimping when a predetermined value of said characteristic impedance is reached.
Claim 11
Dependent Claim
24 words
A method in accordance with claim 9, wherein said method comprises stopping said crimping when a characteristic impedance of substantially 50 ohms is reached.
Claim 12
Dependent Claim
53 words
A method in accordance with claim 1, wherein said dielectric means comprises a spline dielectric having a plurality of radially extending fins the extent of which defines said core outermost radial extent, said crimping step comprising deforming solely a portion of said fins so as to lock said dielectric means to said sheath.
Claim 13
Dependent Claim
37 words
A method in accordance with claim 2, wherein said dielectric means is high density polyethylene and said temperature cycling step comprises cooling said crimped cable at a temperature of substantially -60*C. at one of said temperature extremes.
Claim 14
Dependent Claim
22 words
A method in accordance with claim 12, wherein said cooling step comprises cooling said crimped cable at -60*C. for approximately 2 hours.
Claim 15
Dependent Claim
30 words
A method in accordance with claim 12, wherein said temperature cycling step comprises heating said crimped cable at a temperature of substantially +80*C. at the other of said temperature extremes.
Claim 16
Dependent Claim
37 words
A method in accordance with claim 2, wherein said dielectric means is high density polyethylene and said temperature cycling step comprises heating said crimped cable at a temperature of substantially +80*C. at one of said temperature extremes.
Claim 17
Dependent Claim
22 words
A method in accordance with claim 15, wherein said heating step comprises heating said crimped cable at +80*C. for approximately 2 hours.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |