Load test apparatus for hoisting units by means of strain gages
Method for producing large metallic glass bodies
Geometric balance adjustment of thin film strain gage sensors
Position-electrical signal transducer Patent #: 4381506
ApplicationNo. 06/423615 filed on 09/27/1982
US Classes:73/862.627, Resistance strain gage338/5, Dynamometer type73/862.628, Including a specific type of electrical circuit73/862.629Specific type of elastic member
ExaminersPrimary: Ruehl, Charles A.
Assistant: Tumm, Brian R.
Attorney, Agent or Firm
International ClassesG01L 1/20 (20060101)
G01L 1/22 (20060101)
Foreign Application Priority Data1982-03-25 CH
AbstractThe 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.