US5274393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable helical antenna for a VHF radio
Assignee: SUMMIT COMMERICAL/GILBERLTAR CORP
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Filing: 1991-09-23
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Granted: 1993-12-28
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Expires: 2011-09-23
Abstract
Abstract A VHF radio (10) which includes an adjustable antenna (20) formed from a component (28) shaped like an open helical compression spring which engages and can be screwed into a metal supporting collar (40) for tuning the antenna (20). An elongated plastic or rubber cylindrical member (30) is connected to the metal collar and surrounds at least a portion of the helical member (28). An end cap (32) is provided for closing the other end of the cylindrical member (30).
Inventors
- 👤 Kenneth R. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:16
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
A portable VHF radio having a connector for engaging an adjustable antenna, said adjustable antenna comprising: a metal collar member having an elongated inner opening and an outer connector portion for engaging the antenna connector on the VHF radio; a helical-shaped member formed to have a portion which fits within the inner opening of said metal collar; adjusting means disposed within said inner opening for engaging said helical-shaped member to adjust the length of said helical-shaped member which extends from said metal collar as said helical-shaped member is rotated; and, said adjusting means comprises a pin which extends across the elongated inner opening of said metal collar.
Claim 2
Dependent Claim
107 words
A portable VHF radio having a connector for engaging an adjustable antenna, said adjustable antenna comprising: a metal collar member having an elongated inner opening and an outer connector portion for engaging the antenna connector on the VHF radio; a helical-shaped member formed to have a portion which fits within the inner opening of said metal collar; adjusting means disposed within said inner opening for engaging said helical-shaped member to adjust the length of said helical-shaped member which extends from said metal collar as said helical-shaped member is rotated; and, said adjusting means comprises a pin which extends across the elongated inner opening of said metal collar.
Claim 3
Dependent Claim
27 words
Apparatus as claimed in claim 1 comprising a first flexible tubular member connected to said metal collar and surrounding at least a portion of said helical member.
Claim 4
Dependent Claim
43 words
Apparatus as claimed in claim 3 comprising a second flexible tubular member having a telescopic fit with respect to said first tubular member and being connected to said helical member to move longitudinally with said helical member as said helical member is rotated.
Claim 5
Dependent Claim
17 words
Apparatus as claimed in claim 3 comprising frequency calibration marks formed on said second flexible tubular member.
Claim 6
Dependent Claim
87 words
A radio having an adjustable antenna comprising: a collar member connected to the radio and having an elongated inner opening; an elongated helical shaped member having one end disposed in the inner opening of said collar member; engaging means disposed for engaging and moving said helical shaped member longitudinally with respect to said collar member as said helical shaped member is rotated thereby turning the antenna; and, said engaging means comprises a pin which is disposed within and extends across the inner opening of said collar member.
Claim 7
Dependent Claim
87 words
A radio having an adjustable antenna comprising: a collar member connected to the radio and having an elongated inner opening; an elongated helical shaped member having one end disposed in the inner opening of said collar member; engaging means disposed for engaging and moving said helical shaped member longitudinally with respect to said collar member as said helical shaped member is rotated thereby turning the antenna; and, said engaging means comprises a pin which is disposed within and extends across the inner opening of said collar member.
Claim 8
Dependent Claim
125 words
A portable VHF radio having a connector for engaging an adjustable antenna, said adjustable antenna comprising: a metal collar member having an elongated inner opening and an outer connector portion for engaging the antenna connector on the VHF radio; an open helical-shaped member formed to have a portion which fits within the inner opening of said metal collar; adjusting means disposed within said inner opening for engaging and moving longitudinal said open helical-shaped member as said open helical-shaped member is rotated to adjust the length of said open helical-shaped member which extends from said metal collar; and, said adjusting means comprises internal threads formed on the inside of the elongated inner opening of said metal collar for engaging the outside of said open helical member.
Claim 9
Dependent Claim
125 words
A portable VHF radio having a connector for engaging an adjustable antenna, said adjustable antenna comprising: a metal collar member having an elongated inner opening and an outer connector portion for engaging the antenna connector on the VHF radio; an open helical-shaped member formed to have a portion which fits within the inner opening of said metal collar; adjusting means disposed within said inner opening for engaging and moving longitudinal said open helical-shaped member as said open helical-shaped member is rotated to adjust the length of said open helical-shaped member which extends from said metal collar; and, said adjusting means comprises internal threads formed on the inside of the elongated inner opening of said metal collar for engaging the outside of said open helical member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |