Patent US2367429A successfully refreshed from Google Patents.
US4475409A
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US
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Transducer for dynamometer
Assignee: Mettler Instrumente AG
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Filing: 1982-09-27
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Granted: 1984-10-09
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Expires: 2002-09-27
Abstract
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.
Inventors
- 👤 Hans-Rudolf Zulliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:14
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2206
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
49 words
Transducer for furnishing an electrical signal varying as a function of applied load, comprising a band-shaped substrate of amorphous metal; and at least one sensor on said substrate for furnishing said electrical signal, said sensor having a load-dependent expansion and an electrical characteristic varying in correspondence to said expansion.
Claim 2
Dependent Claim
49 words
Transducer for furnishing an electrical signal varying as a function of applied load, comprising a band-shaped substrate of amorphous metal; and at least one sensor on said substrate for furnishing said electrical signal, said sensor having a load-dependent expansion and an electrical characteristic varying in correspondence to said expansion.
Claim 3
Dependent Claim
29 words
A transducer as set forth in claim 1, wherein said band-shaped substrate has a necked-down section; and wherein said at least one sensor is located on said necked-down section.
Claim 4
Dependent Claim
42 words
A transducer as set forth in claim 2, wherein said at least one sensor comprises a first and second sensor arranged in said necked-down section symmetrically to the center line thereof and in a direction parallel to the direction of load application.
Claim 5
Dependent Claim
55 words
A transducer as set forth in claim 3, further comprising a first and second reference element arranged symmetrically to said first and second sensor in a direction perpendicular to said direction of load application, and means for interconnecting said first and second sensor and said first and second reference element to form a bridge circuit.
Claim 6
Dependent Claim
24 words
A transducer as set forth in claim 4, wherein said first and second sensor and said first and second reference element are strain gauges.
Claim 7
Dependent Claim
22 words
A transducer as set forth in claim 5, wherein all of said strain gauges are applied to one side of said substrate.
Claim 8
Dependent Claim
22 words
A transducer as set forth in claim 6, wherein said strain gauges are applied to said substrate by vapor deposition or sputtering.
Claim 9
Dependent Claim
62 words
A transducer as set forth in claim 1, wherein said band-shaped substrate has a first and second necked-down section; wherein said at least one sensor comprises a first and second sensor arranged in the direction of load application in said first and second necked-down section respectively; and wherein said load is applied to said substrate between said first and second necked-down section.
Claim 10
Dependent Claim
26 words
A transducer as set forth in claim 1, wherein said amorphous metal is an alloy having the general formula Fe x B y Cr z .
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |