Patent US4068282A successfully refreshed from Google Patents.
US4068282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective device for low current transmission circuits
Assignee: INDUSTRIELS C SOULE ETS
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Filing: 1976-09-10
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Granted: 1978-01-10
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Expires: 1996-09-10
Abstract
Abstract Each end of a transmission line comprises a lightning protector and a component ensuring a connection under complete electro-insulation with an emitter on one hand and a receiver on the other hand.
Inventors
- 👤 Francisco Diaz Rigollet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H02H9/06; H04; H04M; H04M1/00; H04M1/738; H04M1/74; H04M1/745
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
207 words
A protective device for low current transmission lines, comprising a transmitting unit connected to one end of said transmission line and a receiving unit connected to the other end of said line, said transmitting unit comprising at least one lightning protector connected to said one end of said line, a filter network across said one end of said line, a transducer for applying signal to said one end of said line, and an emitter for communicating with said transducer through an electrically and magnetically insulated medium, whereby low current signals produced by said transmitting unit can traverse said medium between said emitter and said transducer, and signals produced by energy containing disturbances cannot; said receiving unit comprising at least one second lightning protector connected to said other end of said line, a second filter network across said other end of said line, a second transducer for receiving signals on said line, and a receiver for communicating with said second transducer through an electrically and magnetically insulated medium, whereby low current signals on said line can traverse said medium between said transducer and said receiver, and signals produced by energy containing disturbances cannot, the device further comprising means to check the ability of the line to transmit signals.
Claim 2
Dependent Claim
207 words
A protective device for low current transmission lines, comprising a transmitting unit connected to one end of said transmission line and a receiving unit connected to the other end of said line, said transmitting unit comprising at least one lightning protector connected to said one end of said line, a filter network across said one end of said line, a transducer for applying signal to said one end of said line, and an emitter for communicating with said transducer through an electrically and magnetically insulated medium, whereby low current signals produced by said transmitting unit can traverse said medium between said emitter and said transducer, and signals produced by energy containing disturbances cannot; said receiving unit comprising at least one second lightning protector connected to said other end of said line, a second filter network across said other end of said line, a second transducer for receiving signals on said line, and a receiver for communicating with said second transducer through an electrically and magnetically insulated medium, whereby low current signals on said line can traverse said medium between said transducer and said receiver, and signals produced by energy containing disturbances cannot, the device further comprising means to check the ability of the line to transmit signals.
Claim 3
Dependent Claim
19 words
The device as set forth in claim 1, wherein each transducer comprises an electroluminescent device and a photoelectrical device.
Claim 4
Dependent Claim
21 words
The device as set forth in claim 2, wherein each transducer is formed by grouping an electroluminescent diode with a photo-transistor.
Claim 5
Dependent Claim
16 words
The device as set forth in claim 1, wherein each transducer comprises an optical fiber device.
Claim 6
Dependent Claim
17 words
The device as set forth in claim 1, wherein each transducer is of a hertzian wave type.
Claim 7
Dependent Claim
16 words
The device as set forth in claim 1, wherein each transducer is of a Laser type.
Claim 8
Dependent Claim
28 words
The device as set forth in claim 1, wherein the filter is constituted by at least one resistance, at least one capacitor, and at least one Zener diode.
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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |