Claims
- 1. A gas detector comprising: a pair of electrodes; and a gas detector element comprising a sintered metal oxide block having two parallel opposed rectangular surfaces, said block having an electrical resistance that is a function of a gas to be detected, said electrodes being parallel to one another, normal to a lengthwise axis thereof, lying in a plane disposed centrally between and parallel to said surfaces, spaced a first predetermined distance apart, and embedded in and extending substantially through said block from one side to an opposing side to define a portion thereof, said portion having at least one notch disposed at said surface and extending therethrough, forming a further portion therebetween, said further protion extending substantially therethrough and of a predetermined thickness less than 0.6 millimeters for shortening the penetration time therethrough of said gas.
- 2. The gas detector of claim 1, wherein a pair of uniform opposing notches are formed on said surfaces.
- 3. The gas detector of claim 2, wherein said notches are parallel to and substantially equidistant from said electrodes.
- 4. The gas detector of claim 1, 2, or 3, wherein said predetermined thickness is greater than about 0.1 millimeters.
Priority Claims (1)
Number |
Date |
Country |
Kind |
52/134259 |
Nov 1977 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 958,681, filed Nov. 8, 1978, now U.S. Pat. No. 4,287,751.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3886785 |
Stadler et al. |
Jun 1975 |
|
4187486 |
Takahashi et al. |
Feb 1980 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
958681 |
Nov 1978 |
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