Patent References 3602041 3780817 Load test apparatus for hoisting units by means of strain gages Semiconductor transducer Method for producing large metallic glass bodies Geometric balance adjustment of thin film strain gage sensors Position-electrical signal transducer Patent #: 4381506 InventorAssigneeApplicationNo. 06/423615 filed on 09/27/1982US Classes:73/862.627, Resistance strain gage338/5, Dynamometer type73/862.628, Including a specific type of electrical circuit73/862.629Specific type of elastic memberExaminersPrimary: Ruehl, Charles A.Assistant: Tumm, Brian R. Attorney, Agent or FirmInternational ClassesG01L 1/20 (20060101)G01L 1/22 (20060101) Foreign Application Priority Data1982-03-25 CHAbstractThe measuring element for a dynamometer consists of a band-shaped substrate of amorphous metal. The band-shaped substrate has one or two necked-down sections on which strain gauge resistors are arranged in the direction of load application. The resistor or resistors may be connected in a bridge circuit together with reference resistors. The load-dependent elongation of the resistors unbalances the bridge circuit to create the desired output measuring signal. Use of a suitable alloy of amorphous metal results in good mechanical characteristic of the measuring element. Specifically, there is a high resistance to creep and to hysteresis effects, while relatively high loads may be measured. Further, such a measuring element is also immune to temperature variations. | |