Patent US4047109A successfully refreshed from Google Patents.
US4047109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive-in theater audio system
Assignee: Individual
•
Filing: 1975-09-09
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Granted: 1977-09-06
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Expires: 1995-09-09
Abstract
Abstract A drive-in movie theater audio system provides sound to the patrons over their car radios and connects to each radio through a novel lead-in which couples the car radio antenna to a transmission bus connected to a central broadcast band transmitter. The lead-in employs a pair of elongated wire sections supported parallel to one another to capacitively couple the broadcast band signal to the car antenna.
Inventors
- 👤 Kiichi Sekiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:51
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/53; H04H20/61; H04H20/63; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/18; H04H20/65; H04H20/76; H04H20/77
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
In a system for use in a drive-in theater for reproducing audio sound in plurality of vehicles having broadcast band radio receivers including a central broadcast band transmitter and a wired circuit connected to the output of the transmitter and extending in the vicinity of the vehicles, an improved form of lead-in for connecting the wired circuit to the radio receiver of a vehicle, comprising: a pair of elongated, flexible conductor sections supported in closely spaced parallel relationship to one another, and insulated from one another, one of the conductors being connected to the said wired circuit and the other conductor being connected to the antenna circuit of the vehicle radio to capacitively couple a transmitter signal to the vehicle radio without strong coupling of other broadcast band signals.
Claim 2
Dependent Claim
129 words
In a system for use in a drive-in theater for reproducing audio sound in plurality of vehicles having broadcast band radio receivers including a central broadcast band transmitter and a wired circuit connected to the output of the transmitter and extending in the vicinity of the vehicles, an improved form of lead-in for connecting the wired circuit to the radio receiver of a vehicle, comprising: a pair of elongated, flexible conductor sections supported in closely spaced parallel relationship to one another, and insulated from one another, one of the conductors being connected to the said wired circuit and the other conductor being connected to the antenna circuit of the vehicle radio to capacitively couple a transmitter signal to the vehicle radio without strong coupling of other broadcast band signals.
Claim 3
Dependent Claim
27 words
The system of claim 1 wherein the wire section which connects to the antenna circuit of the vehicle radio carries an alligator clip on its other end.
Claim 4
Dependent Claim
22 words
The system of claim 1 wherein one of the elongated conductor sections is formed by a portion of the vehicle radio antenna.
Claim 5
Dependent Claim
58 words
The system of claim 3 wherein the radio receiver has an antenna supported on the windshield of the vehicle and acting as the conductor section connected to the antenna circuit of the vehicle radio and the elongated conductor section connected to the wire circuit is attached to the exterior of the windshield by a pair of suction cups.
References Cited (Backward Citations)
US2218830A
Cited
US2237260A
Cited
US2581983A
Cited
US2520811A
Cited
US2851537A
Cited
US2880416A
Cited
US2979607A
Cited
US3131351A
Cited
US3518681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |