Patent US3845358A successfully refreshed from Google Patents.
US3845358A
Expired / Lapsed
US
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Integrated polycrystalline varistor surge protective device for high frequency applications
Assignee: General Electric Co
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Filing: 1973-06-29
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Granted: 1974-10-29
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Expires: 1993-06-29
Abstract
Abstract A polycrystalline varistor of the bulk effect zinc oxide base type adapted for use in voltage surge suppression on VHF signal lines is disclosed. The device comprises a unitary body including a spiral inductor electrically in series with the varistor element to prevent capacitive loading of the protected signal line.
Inventors
- 👤 T Anderson
- 👤 F Martzloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:30
CPC Classifications
H; H03; H03G; H03G11/00; H01; H01C; H01C7/00; H01C7/10; H01C7/102; H03G1/00; H03G1/0005; H03G1/0035
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
Apparatus for suppression of voltage surges on VHF signal cables comprising: a body of varistor material having a pair of opposed faces and an electrode on each of said faces; a first non-conductive coating overlying one of said electrodes; an inductor overlying said non-conductive coating; and means for electrically connecting said one of said electrodes to said inductor.
Claim 2
Dependent Claim
58 words
Apparatus for suppression of voltage surges on VHF signal cables comprising: a body of varistor material having a pair of opposed faces and an electrode on each of said faces; a first non-conductive coating overlying one of said electrodes; an inductor overlying said non-conductive coating; and means for electrically connecting said one of said electrodes to said inductor.
Claim 3
Dependent Claim
22 words
Apparatus in accordance with claim 1 wherein said inductor comprises conductive material deposited over said first non-conductive coating in a spiral pattern.
Claim 4
Dependent Claim
15 words
Apparatus in accordance with claim 1 wherein said first non-conductive coating includes magnetic material therein.
Claim 5
Dependent Claim
12 words
The Apparatus of claim 3 wherein said magnetic material is ferrite material.
Claim 6
Dependent Claim
27 words
The apparatus of claim 3 including additionally: a second non-conductive coating including magnetic material therein, said second non-conductive coating overlying said first non-conductive coating and said inductor.
Claim 7
Dependent Claim
50 words
Apparatus in accordance with claim 1 wherein: said inductor has first and second terminals; and said means for electrically connecting connects said one of said electrodes to said first of said terminals to produce a series resonant circuit between the other of said electrodes and said second of said terminals.
Claim 8
Dependent Claim
42 words
The apparatus of claim 6 including additionally: means for connecting said second of said terminals to a first conductor of a VHF signal cable; and means for connecting said other of said electrodes to a second conductor of said VHF signal cable.
Claim 9
Dependent Claim
16 words
Apparatus in accordance with claim 1 wherein said varistor material comprises polycrystalline metal oxide varistor material.
Claim 10
Dependent Claim
31 words
The apparatus of claim 8 wherein said varistor material comprises zinc oxide as a major constituent and a minor constituent selected from the group consisting of other metal oxides and halides.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |