Patent US4228248A successfully refreshed from Google Patents.
Patent US3269865A successfully refreshed from Google Patents.
Patent US5608416A successfully refreshed from Google Patents.
US5608416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable rapidly erectable discone antenna
Assignee: Johns Hopkins University
•
Filing: 1995-11-14
•
Granted: 1997-03-04
•
Expires: 2015-11-14
Abstract
Abstract This invention is a lightweight, portable, quickly assembled, wide band, discone antenna for high frequency ground wave communication. The disk portion of the antenna is formed of telescoping spokes and the cone portion is formed of separate retractable wire elements. Disassembled, the antenna can be carried in a backpack. It can be assembled in less than ten minutes to achieve non-fading, non-line-of-sight communication.
Inventors
- 👤 James R. Champion
- 👤 Denver N. Tenney
- 👤 Laurence C. Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:49
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28; H01Q1/00; H01Q1/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A central hub for a portable rapidly erectable discone antenna comprising: a top plate assembly, an inverted cup shaped cylindrical spacer provided with a flat closed end and an open end and having a cylindrical interior which terminates in a bottom surface; a bottom plate; a plurality of flexible wires; and wherein the top plate assembly is mounted on said flat closed end of said spacer and is provided with means to detachably connect a plurality of telescoping linear elements to the central hub; and wherein said bottom plate is mounted on said open end of said spacer, and is provided with means for detachably connecting said flexible wires to the periphery of said bottom plate and is provided with a central opening having a diameter greater than the diameter of the cylindrical interior; and a supporting mast inserted through the central opening in said bottom plate and extending into the cylindrical interior of said spacer a distance sufficient to come into direct and removeable engagment with the bottom surface of said cylindrical interior of said spacer in abutting supporting relationship.
Claim 2
Dependent Claim
181 words
A central hub for a portable rapidly erectable discone antenna comprising: a top plate assembly, an inverted cup shaped cylindrical spacer provided with a flat closed end and an open end and having a cylindrical interior which terminates in a bottom surface; a bottom plate; a plurality of flexible wires; and wherein the top plate assembly is mounted on said flat closed end of said spacer and is provided with means to detachably connect a plurality of telescoping linear elements to the central hub; and wherein said bottom plate is mounted on said open end of said spacer, and is provided with means for detachably connecting said flexible wires to the periphery of said bottom plate and is provided with a central opening having a diameter greater than the diameter of the cylindrical interior; and a supporting mast inserted through the central opening in said bottom plate and extending into the cylindrical interior of said spacer a distance sufficient to come into direct and removeable engagment with the bottom surface of said cylindrical interior of said spacer in abutting supporting relationship.
Claim 3
Dependent Claim
31 words
A central hub according to claim 1, wherein said mast is of metallic construction the spacer electrically isolates the top plate assembly, the bottom plate and the mast from one another.
Claim 4
Dependent Claim
61 words
A central hub according to claim 1, wherein the top plate assembly is provided with means to detachably connect to a plurality of telescoping linear elements to form a disk portion of the discone antenna, and the bottom plate is provided with means to detachably connect to said plurality of flexible wires to form a cone portion of the discone antenna.
References Cited (Backward Citations)
US1573171A
Cited
US1655892A
Cited
US1803620A
Cited
US1852925A
Cited
US1933959A
Cited
US2189309A
Cited
DE880604C
Cited
US2419538A
Cited
US2618746A
Cited
US3189906A
Cited
US3518694A
Cited
US3579244A
Cited
US3618107A
Cited
US3701159A
Cited
US3787865A
Cited
GB1502100A
Cited
GB1508784A
Cited
US4143377A
Cited
JPS5731203A
Cited
US4872022A
Cited
US4691209A
Cited
US4804973A
Cited
US4743917A
Cited
US4750001A
Cited
US4918460A
Cited
US4851859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-03 | 2004-09-02 | 2005-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-03 | 2008-09-02 | 2009-03-04 | $7700.00 | Window Closed / Lapsed |