U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Transducer for dynamometer

Patent 4475409 Issued on October 9, 1984. Estimated Expiration Date: Icon_subject September 27, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

3602041

3780817

Load test apparatus for hoisting units by means of strain gages
Patent #: 4140010
Issued on: 02/20/1979
Inventor: Kulpmann ,   et al.

Semiconductor transducer
Patent #: 4166384
Issued on: 09/04/1979
Inventor: Matsuda ,   et al.

Method for producing large metallic glass bodies
Patent #: 4298382
Issued on: 11/03/1981
Inventor: Stempin ,   et al.

Geometric balance adjustment of thin film strain gage sensors
Patent #: 4331035
Issued on: 05/25/1982
Inventor: Eisele ,   et al.

Position-electrical signal transducer Patent #: 4381506
Issued on: 04/26/1983
Inventor: Linn ,   et al.

Inventor

Assignee

Application

No. 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

Examiners

Primary: Ruehl, Charles A.
Assistant: Tumm, Brian R.

Attorney, Agent or Firm

International Classes

G01L 1/20 (20060101)
G01L 1/22 (20060101)

Foreign Application Priority Data

1982-03-25 CH

Abstract

The 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.

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