US4379298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable citizen band antenna
Assignee: PAL INTERNATIONAL Inc
•
Filing: 1981-07-20
•
Granted: 1983-04-05
•
Expires: 2001-07-20
Abstract
Abstract An improved tunable citizen band antenna includes an adjustable tuning assembly located at the tip of a wire wound fiberglass core antenna to lengthen or shorten the effective electrical length of the antenna, so that the antenna can be tuned to a specific, desired resonant frequency, resulting in enhanced antenna radiation, reception, and power transmission.
Inventors
- 👤 Richard G. Vincent
- 👤 Frank Sacks
- 👤 Robert F. Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:27
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/14; H01Q9/145
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
A tunable antenna comprised of: a flexible core; a conductive internally threaded tuning extender mounted to the top of said flexible core; a conductive base mounted to the bottom of said flexible core; a conductive wire forming an electrical path from said conductive base to said tuning extender; a conductive externally threaded tuning screw threaded within said conductive tuning extender; a conductive internally threaded jam nut coupled on said tuning screw; and a rubber "O"-ring mounted between said conductive jam nut and said conductive tuning extender.
Claim 2
Dependent Claim
86 words
A tunable antenna comprised of: a flexible core; a conductive internally threaded tuning extender mounted to the top of said flexible core; a conductive base mounted to the bottom of said flexible core; a conductive wire forming an electrical path from said conductive base to said tuning extender; a conductive externally threaded tuning screw threaded within said conductive tuning extender; a conductive internally threaded jam nut coupled on said tuning screw; and a rubber "O"-ring mounted between said conductive jam nut and said conductive tuning extender.
Claim 3
Dependent Claim
37 words
A tunable antenna in accordance with claim 1 wherein said flexible core is of length sufficient to allow for transmission of required harmonics of a desired frequency radio signal, less the length of said conductive tuning extender.
Claim 4
Dependent Claim
15 words
A tunable antenna in accordance to claim 1 wherein said core is made of fiberglass.
Claim 5
Dependent Claim
21 words
A tunable antenna in accordance to claim 1 wherein said conductive tuning extender is coupled to said flexible core with epoxy.
Claim 6
Dependent Claim
17 words
A tunable antenna in accordance to claim 1 wherein said conductive tuning extender is fabricated of brass.
Claim 7
Dependent Claim
22 words
A tunable antenna in accordance with claim 1 wherein said conductive base is threaded so as to screw into a mounting base.
Claim 8
Dependent Claim
16 words
A tunable antenna in accordance with claim 6 wherein said conductive base is fabricated of brass.
Claim 9
Dependent Claim
30 words
A tunable antenna in accordance with claim 1 wherein said conductive wire is wound around said flexible core and connected to said conductive base and to said conductive tuning extender.
Claim 10
Dependent Claim
22 words
A tunable antenna in accordance with claim 8 wherein said conductive wire is wound around said flexible core at a predetermined pitch.
Claim 11
Dependent Claim
24 words
A tunable antenna in accordance with claim 1 wherein said conductive wire and said flexible core is sealed within a resilient, static eliminating material.
Claim 12
Dependent Claim
14 words
A tunable antenna in accordance with claim 10 wherein said sealing material is polyolefin.
Claim 13
Dependent Claim
21 words
A tunable antenna in accordance with claim 1 wherein said tuning extender and tuning screw are sealed within a protective glove.
Claim 14
Dependent Claim
80 words
A tunable antenna, comprising: a flexible core; a conductive base member coupled to the bottom of said core; an upper conductive member coupled to the top of said core; a conductive transmission line wound around said core and coupled at opposite ends to said upper conductive member and to said conductive base member to complete a conductive path; and rotatable tuning means having a conductive electrical coupling to said upper conductive member for varying the length of said conductive path.
Claim 15
Dependent Claim
80 words
A tunable antenna, comprising: a flexible core; a conductive base member coupled to the bottom of said core; an upper conductive member coupled to the top of said core; a conductive transmission line wound around said core and coupled at opposite ends to said upper conductive member and to said conductive base member to complete a conductive path; and rotatable tuning means having a conductive electrical coupling to said upper conductive member for varying the length of said conductive path.
Claim 16
Dependent Claim
71 words
An antenna according to claim 13 wherein: said upper member comprises an internally threaded extender; said rotatable tuning means comprises a conductive externally threaded tuning screw having an electrically conductive threaded engagement with said extender so that said tuning screw can be received at a desired depth by said upper member; and said antenna further comprising locking means for securing said tuning screw within said upper member at said desired depth.
Claim 17
Dependent Claim
21 words
An antenna according to claim 14 wherein said locking means is an internally threaded jam nut mounted on said tuning screw.
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) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |