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| Semiconductor memory device |
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| Gas sensor |
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| PDTI metal alloy as a hydrogen or hydrocarbon sensitive metal |
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| Rod bending system |
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Enhanced protective lens cover for an infrared thermometer
| Details |
Inventors: Fraden, Jacob; Brown, Joseph P.; Lackey, Robert P.; Howe, Randall R.; Bultges, Heinz; Debus, Wolfram; Bautz, Gunther; Franke, Helmut;
Assignee: Braun Thermoscan (San Diego, CA)
Primary Examiner: Gutierrez; Diego
Assistant Examiner:
Attorney, Agent or Firm: Hopgood, Calimafde, Kalil & Judlowe
A disposable cover for an infrared thermometer provides IR window isolation of handling and usage generated forces. The cover comprises a thin sidewall linked to the film window with a collar structure. The collar structure includes one or more characteristics that either isolate the film window from externally applied forces, or develops counter forces in a way that precludes film stretching and other transmission distorting effects. In a preferred embodiment, the probe includes retention ears and the cover includes a rim that cooperatively engages the retention ears. This combination of retention ears and an interlocking rim decreases movement of the cover along the probe axis. The cover of the present invention permits sanitary application of an infrared clinical thermometer without hindering reading accuracy or patient comfort. |
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DETAILED DESCRIPTION OF THE INVENTION First briefly in overview, the present invention is directed to novel probe cover configurations engineered for enhanced use with clinical thermometers applying infrared temperature detection.
The inventive probe cover configuration provides an infrared transparent window that, in its initial, stress-free condition, is optimized for infrared radiation transmission.
The window is formed of a highly transmissive polymer material and configured to minimize the potential error sources found in prior art designs.
The inventive probe design is further engineered to prevent subsequent forces from distorting the IR window during use.
There are at least two sources of window distortion forces applied to the probe cover.
The first distortion force is applied during the probe cover installation onto the thermometer probe tip.
As discussed above, the probe cover should be affixed to the probe in a repeatably accurate operation.
This attachment process invariably imparts a force to the cover structure.
It is, therefore, a feature of the present invention to isolate the IR window portion of the cover from the attachment forces encountered during cover installation.
The second source of distortion forces to the cover arises during a temperature reading.
To take a reading, the cover/probe is inserted into the ear canal to create the requisite optical axis between the tympanic membrane of the ear and the IR sensor imbedded in the clinical thermometer.
The sliding action of the cover wall against an inner ear canal creates small frictional forces on the cover.
Accordingly, it is a second feature of the present invention to isolate the IR transmission window from these frictional forces that may arise during the actual temperature acquisition process.
The force isolation described above is accomplished by use of a collar structure juxtaposed between the side wall of the cover and the film window.
In this context, the term "collar" is broadly used to include one or more structural elements that are applied individually or in combination to either isolate the window from wall forces, enhance sensor view, minimize sensor--ear canal contact or create counter forces to negate the translation of wall forces to the film window
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Active Solid-state 
