US3742419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral sensor for monitoring a metal oxide varistor
Assignee: General Electric Co
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Filing: 1971-09-30
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Granted: 1973-06-26
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Expires: 1991-09-30
Abstract
Abstract A body of sintered metal oxide material having first and second opposed surfaces and a third surface disposed therebetween has first and second electrodes in contact with the first two opposed surfaces for establishing a main conductive path through the device and a third electrode in contact with one of the two opposed surfaces and spaced very close to the corresponding electrode for establishing a monitoring conductive path for sensing the operating temperature of the body as a function of the resistance thereof. The monitoring path may also be established by a pair of third electrodes positioned on opposite sides of the surface interconnecting the first two surfaces whereby the monitoring path intersects the main conductive path. The sintered metal oxide material has varistor characteristics.
Inventors
- 👤 F Martzloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:51
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/102
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
45 words
The integral sensor set forth in cliam 1 wherein said at least third electrode is a single third electrode in contact with said first surface and positioned in close proximity to said first electrode whereby the monitoring path is close to the main conductive path.
Claim 2
Dependent Claim
34 words
The integral sensor set forth in claim 2 wherein said first electrode is of annular shape, and said third electrode is positioned in spaced apart relationship from the inner edge of said first electrode.
Claim 3
Dependent Claim
26 words
The integral seNsor set forth in claim 3 wherein said third electrode is concentric with said first electrode and uniformly spaced from the inner edge thereof.
Claim 4
Dependent Claim
72 words
The integral sensor set forth in claim 4 and further comprising a first electrical conductor havng a first end connected to said third electrode, and a second electrical conductor having a first end connected to said first electrode, the resistance of the metal oxide varistor body as sensed across second ends of said first and second conductors being variables as a function of the operating temperature of the metal oxide varistor body.
Claim 5
Dependent Claim
32 words
The integral sensor set forth in claim 2 wherein said at least third electrode consists of third and fourth electrodes in contact with the third surface interconnecting the first and second surfaces.
Claim 6
Dependent Claim
37 words
The integral sensor set forth in claim 6 wherein said third surface is a surface defining the side wall of a cylinder, and said third and fourth electrodes are positioned on opposite sides of said third surface.
Claim 7
Dependent Claim
46 words
The integral sensor set forth in claim 7 wherein said first, second and third surfaces form a right cylinder, said first and second electrodes are positioned centrally on said first and second surfaces, and said third and fourth electrodes are uniformly spaced from said first surface.
Claim 8
Dependent Claim
52 words
The integral sensor set forth in claim 8 wherein said first, second and third surfaces form a right cylinder having a circular cross section, and said third and fourth electrodes are diametrically opposed on said third surface whereby the monitoring path between said third and fourth electrodes intersects the main conductive path.
Claim 9
Dependent Claim
55 words
The integral sensor set forth in claim 8 wherein said first, second and third surfaces form a right cylinder, said first and second electrodes are positioned centrally on said first and second surfaces, and said third and fourth electrodes are equally spaced from said first and secnd surfaces and diametrically opposed on said third surface.
Claim 10
Dependent Claim
72 words
The integral sensor set forth in claim 9 and further comprising a first electrical conductor having a first end connected to said third electrode, and a second electrical conductor having a first end connected to said fourth electrode, the resistance of the metal oxide varistor body as sensed across second ends of said first and second conductors being variable as a function of the operating temperature of the metal oxide varistor body.
Claim 11
Dependent Claim
24 words
The integral sensor set forth in claim 1 wherein said body of metal oxide varistor material has an alpha exponent in excess of 10.
Claim 12
Dependent Claim
153 words
An integral sensor for monitoring the temperature state of an included nonlinear resistance device comprising a body of varistor material exhibiting nonlinear resistance characteristics and having first and second opposed major surfaces and at least a third surface disposed therebetween, first and second electrodes in respective contact with said first and second opposed surfaces, said first and second electrodes positioned for establishing a main conductive path through the body of nonlinear resistance material, and at least a third electrode in contact with one of the several surfaces of said nonlinear resistance device, said third electrode disposed in spaced apart relationship with said first and second electrodes and in a predetermined position relative to the main conductive path for establishing a monitoring conductive path for monitoring the operating temperature of the nonlinear resistance body along the main conductive path as a function of the resistance of the body as sensed by the third electrode.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |