Patent US4031499A successfully refreshed from Google Patents.
US4031499A
Expired / Lapsed
US
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Thermistor device
Assignee: Siemens AG
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Filing: 1975-06-30
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Granted: 1977-06-21
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Expires: 1995-06-30
Abstract
Abstract A thermistor arrangement for the demagnetization of color television picture tubes having a continuous coating or layer at one side thereof which is maintained at a given potential and having two coatings or layers on the other side which are spaced by a width which approximately corresponds to the thickness of the thermistor. The thermistor is connected in a circuit arrangement so that it is divided into first and second zones with one of the zones acting as a heater for the other zone which acts as a switch for the demagnetization coil. The tube conductive coatings or layers which are spaced by a slot may be arranged in various patterns to produce given desired characteristics.
Inventors
- 👤 Wolfgang Brueckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:24
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/29; H01; H01C; H01C1/00; H01C1/14; H01C1/1406
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A thermistor device comprising: a PTC thermistor body having first and second surfaces and a given body thickness therebetween, a continuous conductive layer on said first surface of said thermistor body, two conductive layers on the said second surface of said thermistor body and spaced from said continuous layer by said given thickness, each of said two conductive layers being spaced apart on said second surface by a predetermined interval, said predetermined interval being substantially the same as said given body thickness, and said thermistor having three terminals, one for each of said conductive layers.
Claim 2
Dependent Claim
95 words
A thermistor device comprising: a PTC thermistor body having first and second surfaces and a given body thickness therebetween, a continuous conductive layer on said first surface of said thermistor body, two conductive layers on the said second surface of said thermistor body and spaced from said continuous layer by said given thickness, each of said two conductive layers being spaced apart on said second surface by a predetermined interval, said predetermined interval being substantially the same as said given body thickness, and said thermistor having three terminals, one for each of said conductive layers.
Claim 3
Dependent Claim
30 words
A thermistor in accordance with claim 1 wherein the thermistor body is disc-shaped and wherein the two conductive layers on the second surface are in the shape of semi-circular layers.
Claim 4
Dependent Claim
31 words
A thermistor in accordance with claim 1 wherein the thermistor body is disc-shaped and wherein the two layers applied to the second surface thereof are in the form of concentrically-shaped layers.
Claim 5
Dependent Claim
37 words
A thermistor in accordance with claim 1 wherein the thermistor body is disc-shaped and wherein the two layers applied to the second surface are formed in such a manner as to be separated by a zig-zag-shaped interval.
Claim 6
Dependent Claim
33 words
A thermistor in accordance with claim 1 wherein the thermistor body is disc-shaped and wherein the two layers on the second surface are spaced from each other by an interval which is meander-shaped.
Claim 7
Dependent Claim
48 words
A thermistor in accordance with claim 1 wherein the thermistor body is tube-shaped and wherein the first surface comprises the inside surface of the tube and carries the said continuous conductive layer and the second surface comprises the outside surface of the tube carrying said two conductive layers.
Claim 8
Dependent Claim
27 words
A thermistor in accordance with claim 1 wherein the two layers which are disposed on the second surface have approximately the same surface area as each other.
References Cited (Backward Citations)
US3619703A
Cited
US3845442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |