Strain gage and measuring transducer and method of producing the same
AssigneeHottinger Baldwin Messtechnik GmbH
InventorsMartin Hauber, Helmut Burfeindt
Life of this patent
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Abstract
A strain gage includes, in stacked order, a backing film (1), a measuring resistor grid (2), and a cover (16) including a first layer (6) of an insulating material and a second layer (7) of a metallic material. At least the metallic second layer (7) of the cover is a metallic foil having a size or extension in the plane of the cover that is smaller than or equal to the size or extension of the backing film (1). The strain gage is simple to manufacture in a continuous strip or large sheet process, and is relatively insensitive to the effects of moisture or changes in humidity.
Claims22
A strain gage comprising in order a backing film, a resistor grid, and a cover including an insulating first layer and a metallic foil second layer, wherein said second layer has dimensions in the plane of said cover that are smaller than or equal to corresponding dimensions of said backing film.
A measuring transducer comprising a strainable member and a plurality of strain gages mounted thereon, wherein each of said strain gages comprises in order a backing film, a resistor grid including electrical contacts, and a cover including an insulating first layer and a metallic foil second layer, wherein said second layer has dimensions in the plane of said cover that are smaller than or equal to corresponding dimensions of said backing film, and wherein said strain gages are selected from the group consisting of strain gages in which said cover extends over the entire area of said backing film except at said electrical contacts and strain gages in which said cover extends over only a portion of the area of said backing film except at said electrical contacts.
Dependencies are inferred from the claim text.