US4281287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape leads for probes in electromagnetic radiation
Assignee: General Electric Co
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Filing: 1979-04-09
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Granted: 1981-07-28
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Expires: 1999-04-09
Abstract
Abstract Electrically conducting magnetic recording tape having a coating of γ-Fe 2 O 3 particles on a polyester substrate is used as leads for probes in oven cavities and other microwave fields. The tape leads are flexible, have a high resistance per unit length, and are nearly transparent to electromagnetic waves. Electric diode-dipole probes with such leads are uniquely electric and a magnetic loop detector is uniquely magnetic.
Inventors
- 👤 Charles L. Andrews
- 👤 Lorne H. Belden, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:58
CPC Classifications
H; H01; H01Q; H01Q9/00; G; G01; G01R; G01R1/00; G01R1/02; G01R1/06; G01R29/00; G01R29/08; G01R29/0864; G01R29/0878; G01R33/00; G01R33/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A uniquely electric probe for detecting the electric field component of electromagnetic radiation comprising: a dipole antenna and associated diode detector for generating a potential difference related to the magnitude of the electric field, and a pair of leads connected across said detector to transmit the potential difference to utilization circuitry, said leads being electrically conductive flexible magnetic tape that has a high resistance per unit length and is minimally perturbing to the electromagnetic waves and is comprised of an insulating substrate having a coating of contacting γ-Fe 2 O 3 particles.
Claim 2
Dependent Claim
92 words
A uniquely electric probe for detecting the electric field component of electromagnetic radiation comprising: a dipole antenna and associated diode detector for generating a potential difference related to the magnitude of the electric field, and a pair of leads connected across said detector to transmit the potential difference to utilization circuitry, said leads being electrically conductive flexible magnetic tape that has a high resistance per unit length and is minimally perturbing to the electromagnetic waves and is comprised of an insulating substrate having a coating of contacting γ-Fe 2 O 3 particles.
Claim 3
Dependent Claim
41 words
The electric probe of claim 1 wherein said dipole antenna has colinear wings and said detector is a Schottky diode mounted between said colinear wings, and the resistance per unit length of said magnetic tape is about 1.5 megohms per meter.
Claim 4
Dependent Claim
41 words
The electric probe of claim 1 wherein said detector is a point contact diode having a pair of wire leads which are said dipole antenna, and the resistance per unit length of said magnetic tape is about 1.5 megohms per meter.
Claim 5
Dependent Claim
99 words
A uniquely magnetic probe for detecting the magnetic field component of electromagnetic radiation comprising: a small loop antenna and a capacitor and diode detector connected in the loop to generate a potential difference related to the magnitude of the magnetic field, and a pair of leads connected across said detector to transmit the potential difference to utilization circuitry, said leads being electrically conductive flexible magnetic tape that has a high resistance per unit length and is minimally perturbing to the electromagnetic waves and is comprised of an insulating substrate having a coating of contacting γ-Fe 2 O 3 particles.
Claim 6
Dependent Claim
99 words
A uniquely magnetic probe for detecting the magnetic field component of electromagnetic radiation comprising: a small loop antenna and a capacitor and diode detector connected in the loop to generate a potential difference related to the magnitude of the magnetic field, and a pair of leads connected across said detector to transmit the potential difference to utilization circuitry, said leads being electrically conductive flexible magnetic tape that has a high resistance per unit length and is minimally perturbing to the electromagnetic waves and is comprised of an insulating substrate having a coating of contacting γ-Fe 2 O 3 particles.
Claim 7
Dependent Claim
29 words
The magnetic probe of claim 4 wherein said detector is a Schottky diode, and the resistance per unit length of said magnetic tape is about 1.5 megohms per meter.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |