US3699585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible helical antenna
Assignee: Boeing North American Inc
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Filing: 1970-12-17
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Granted: 1972-10-17
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Expires: 1990-12-17
Abstract
Abstract A collapsible helical antenna formed of an extensible boom made of preferably two coiled flat steel ribbons which, when uncoiled, become tubular one inside the other and formed of a helical conductor that is suspended coaxially from the boom by a plurality of rings disposed around the boom and tied together by flexible members and by tensioned members extending from the rings to the helical conductor so that, as the boom is extended, the rings slide along the boom to become separated a distance determined by the flexible members but the helical wire is still maintained coaxial with the boom.
Inventors
- 👤 Adrian O Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:47
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08; H01Q11/086
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A collapsible, helical antenna comprising: a boom; a helical conductor disposed around said boom; a plurality of rings disposed on said boom and in sliding relation therewith; first tension elements extending from said rings to said helical conductor to hold said conductor coaxial to said boom; and flexible elements disposed to extend between adjacent ones of said rings for determining the maximum pitch of said helical conductor.
Claim 2
Dependent Claim
67 words
A collapsible, helical antenna comprising: a boom; a helical conductor disposed around said boom; a plurality of rings disposed on said boom and in sliding relation therewith; first tension elements extending from said rings to said helical conductor to hold said conductor coaxial to said boom; and flexible elements disposed to extend between adjacent ones of said rings for determining the maximum pitch of said helical conductor.
Claim 3
Dependent Claim
50 words
The antenna of claim 1 wherein: said boom is extendable and retractable and comprises at least one extendable resilient strip that is so fabricated so as to tend to form into an elongated tube, and when unrestrained has its longitudinal axis lying parallel to the longitudinal centerline of the strip.
Claim 4
Dependent Claim
38 words
The antenna of claim 2 wherein: said boom further includes another one of said resilient strip; and said other one of said strips being disposed within the tubular form of said one strip when in the unrestrained position.
Claim 5
Dependent Claim
54 words
The antenna of claim 3 wherein: said boom is further defined that the longitudinal edges of said one strip is disposed opposite the longitudinal edges of said other strip when said strips are in their tubular form; and separate spools are provided for each strip to be rolled onto when said boom is retracted.
Claim 6
Dependent Claim
38 words
The antenna of claim 4 wherein: the free ends of said strips are bonded together; and one of said rings that is disposed nearest the free ends is bonded to said one strip substantially adjacent the free end.
Claim 7
Dependent Claim
54 words
The antenna of claim 5 wherein: two of said tension elements have one end respectively bonded at the same point on one of said rings; and two of said tension elements have the other end respectively bonded to the same point on said conductor to form a zig-zag configuration when said antenna is extending.
Claim 8
Dependent Claim
51 words
The antenna of claim 1 wherein: said boom is extendable and retractable and comprises at least one extendable narrow resilient strip that is so fabricated so as to tend to form into an elongated tube and when unrestrained has its longitudinal axis lying parallel to the longitudinal centerline of the strip.
Claim 9
Dependent Claim
39 words
The antenna of claim 7 wherein: said boom further includes another one of said narrow, resilient strips; and said other one of said strips being disposed within the tubular form of said one strip when in the unrestrained position.
Claim 10
Dependent Claim
54 words
The antenna of claim 8 wherein: said boom is further defined that the longitudinal edges of said one strip is disposed opposite the longitudinal edges of said other strip when said strips are in their tubular form; and separate spools are provided for each strip to be rolled onto when said boom is retracted.
Claim 11
Dependent Claim
39 words
The antenna of claim 9 wherein: the free end of said strips are bonded together; and one of said rings, that is disposed nearest said free end, is bonded to said one strip substantially adjacent the free end thereof.
Claim 12
Dependent Claim
54 words
The antenna of claim 10 wherein: two of said tension elements have one end respectively bonded at the same point on one of said rings; and two of said tension elements have the other end respectively bonded to the same point on said conductor to form a zig-zag configuration when said antenna is extended.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |