US4080569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio transceiver dimmer switch
Assignee: Individual
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Filing: 1976-09-16
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Granted: 1978-03-21
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Expires: 1996-09-16
Abstract
Abstract A two-pole switch is placed in series between two lengths of a coaxial cable that extends from a transceiver to an antenna. When the switch is in the first pole position, little or no resistance or impedance is added to the circuit, and when the switch is in the second pole position, a resistor is added in series with the center conductors of both lengths and another resistor is connected across the center and outer conductor of the coaxial cable. Preferably this other resistor is an incandescent lamp so that the operator of the transceiver, when broadcasting, has a visible indication showing in which pole position the switch is, because now most of the output power of the transceiver passes through the lamp to light it.
Inventors
- 👤 Lester L. Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
A circuit capable of being coupled between two lengths of coaxial cable which in turn couples a transceiver and an antenna, said circuit comprising; a double throw switch having first and second poles and an arm which makes alternate contact between said poles; one length of said coaxial cable having a center conductor which is coupled to said arm; the other length of said coaxial cable having a center conductor which is coupled to said first pole; a first impedance coupled between said center conductors; a second impedance coupled between said second pole and both outer conductors of said both lengths of cable so that when said arm contacts said first pole said first and second impedances are out of the circuit and when said arm contacts said second pole said first impedance is a part of said center conductor and second impedance forms short circuit between the center and outer conductors.
Claim 2
Dependent Claim
152 words
A circuit capable of being coupled between two lengths of coaxial cable which in turn couples a transceiver and an antenna, said circuit comprising; a double throw switch having first and second poles and an arm which makes alternate contact between said poles; one length of said coaxial cable having a center conductor which is coupled to said arm; the other length of said coaxial cable having a center conductor which is coupled to said first pole; a first impedance coupled between said center conductors; a second impedance coupled between said second pole and both outer conductors of said both lengths of cable so that when said arm contacts said first pole said first and second impedances are out of the circuit and when said arm contacts said second pole said first impedance is a part of said center conductor and second impedance forms short circuit between the center and outer conductors.
Claim 3
Dependent Claim
32 words
The circuit of claim 1 wherein; said arm is coupled to said length which coupled to the transceiver; said first pole is coupled to said length which is coupled to the antenna.
Claim 4
Dependent Claim
20 words
The circuit of claim 2 wherein: said first impedance is a resistor; said second impedance being an electrical illuminating bulb.
Claim 5
Dependent Claim
28 words
The circuit of claim 3 wherein: said resistor has a value between 5000 and 8000 ohms; said bulb has a rating of 6 watts and approximately 12 volts.
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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |