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Moisture impervious impact shield for a transducer and method of making the same

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专利汇可以提供Moisture impervious impact shield for a transducer and method of making the same专利检索,专利查询,专利分析的服务。并且A moisture impervious impact shield is provided for a transducer including an elastically deformable bar having a plurality of electrical strain gauges mounted thereon for measuring the elastic deformation of the bar. The method employed in making the moisture impervious impact shield comprises forming and bonding an inner sleeve to and covering that portion of the bar to which the strain gauge is attached. This sleeve is formed of a foamed material, preferably silicone-rubber foam, which has a low bulk modulus, and therefore does not affect the transducer bar during elastic deformation thereof. An intermediate sleeve is then formed of a moisture impervious material, preferably silicone rubber and encases the inner sleeve. An outer metallic sleeve surrounds and is bonded to the intermediate sleeve and protects the electrical strain gauges against impact-type damage.,下面是Moisture impervious impact shield for a transducer and method of making the same专利的具体信息内容。

1. A transducer device comprising: an elongate elastically deformable bar being elastically deformable in response to a load applied thereto, a plurality of pairs of electrical strain gauges mounted on said bar for detecting changes in the electrical properties of the strain gauges produced in response to elastic deformation of the bar, said strain gauges being adapted to be connected to electrical measuring circuitry for measuring the changes in electrical properties in strain gauges and producing an output representative of the magnitude of the load, an inner sleeve formed of a low bulk modulus foamed material adhering to said bar and covering said strain gauges, the bulk modulus of said inner sleeve being sufficiently low so as not to affect the bar during elastic deformation thereof, an intermediate sleeve formed of moisture impervious nonmetallic material completely covering and adhering to said first sleeve and adhering to said bar, and an outer sleeve formed of a rigid material and covering and bonded to said intermediate sleeve.
2. The transducer device as defined in claim 1 wherein said inner sleeve is formed of a silicone-rubber foam.
3. The transducer device as defined in claim 1 wherein said outer sleeve is formed of a metallic material.
4. The transducer device as defined in claim 1 wherein said inner sleeve is formed of silicone-rubber foam, said intermediate sleeve being formed of silicone-rubber, and said outer sleeve being formed of metal.
5. A transducer device comprising: an elongate elastically deformable bar being elastically deformable in response to a load applied thereto, a plurality of pairs of electrical strain gauges mounted on said bar for detecting changes in the electrical properties of the strain gauges produced in response to elastic deformation of the bar, said strain gauges being adapted to be connected to electrical measuring circuitry for measuring the changes in electrical properties in strain gauges and producing an output representative of the magnitude of the load, an inner sleeve formed of a low bulk modulus material adhering to said bar and covering said strain gauges, the bulk modulus of said inner sleeve being sufficiently low so as not to affect the bar during elastic deformation thereof, an intermediate moisture impervious sleeve formed of silicone rubber completely covering and adhering to said first sleeve and adhering to said bar, and an outer sleeve formed of a rigid material and covering and bonded to said intermediate sleeve.
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