Patent US1859739A successfully refreshed from Google Patents.
US3987448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
AM/FM antenna system
Assignee: Lawrence Peska Associates Inc
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Filing: 1975-05-08
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Granted: 1976-10-19
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Expires: 1995-05-08
Abstract
Abstract An antenna system improvement for a conventional AM/FM radio having a ferrite coil antenna for AM and other antenna such as a telescoping whip for FM feeding an FM antenna input, includes a pair of terminals adapted to be connected to an external antenna lead in wire, an auxiliary coil wrapped around the ferrite antenna and a single pole double throw switch for connecting either the auxiliary coil or the FM antenna input to the terminals.
Inventors
- 👤 Ronald K. Scheppman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
In an AM/FM radio receiver within a housing having a ferrite coil antenna for AM and another distinct antenna means for FM coupled to an FM input the improvement comprising: a pair of terminals on said housing adapted to be connected to an external antenna, an auxiliary coil wrapped around said ferrite antenna in inductive coupling relationship thereto, and a single pole double throw switch having a wiper connected to one of said terminals and a pair of contacts, associated with said wiper, respectively connected to said auxiliary coil and to said FM antenna means for coupling either said auxiliary coil or said FM antenna means to said terminals.
Claim 2
Dependent Claim
109 words
In an AM/FM radio receiver within a housing having a ferrite coil antenna for AM and another distinct antenna means for FM coupled to an FM input the improvement comprising: a pair of terminals on said housing adapted to be connected to an external antenna, an auxiliary coil wrapped around said ferrite antenna in inductive coupling relationship thereto, and a single pole double throw switch having a wiper connected to one of said terminals and a pair of contacts, associated with said wiper, respectively connected to said auxiliary coil and to said FM antenna means for coupling either said auxiliary coil or said FM antenna means to said terminals.
References Cited (Backward Citations)
DE1021438B
Cited
US3364487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |