US4115174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying miniaturized high-temperature free-grid strain gauges
Assignee: MTU Aero Engines AG
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Filing: 1977-04-14
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Granted: 1978-09-19
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Expires: 1997-04-14
Abstract
Abstract A method of applying miniaturized high-temperature free-grid strain gauges to a test location by welding an auxiliary temporary backing to a strain gauge equipped with supporting or backing foil and connecting excess-length connecting webs thereto for manipulation of the gauge. Thereafter, the strain gauge is adhered, grid side facing downwardly, to a porous backing by means of an adhesive, the backing foil is then stripped off and the adhesive dissolved by a chemical solvent. The strain gauge is then applied to the test location and affixed thereto.
Inventors
- 👤 Heinrich Franz Bauer
- 👤 Anton Eichinger
- 👤 Ernst Feitzelmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:47
CPC Classifications
G; G01; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2287; G01B; G01B7/00; G01B7/16; G01B7/18; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/1111; Y10T156/1116; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49103; Y10T29/4981
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A method of applying a miniaturized high-temperature free-grid strain gauge of foil construction, or a similar high-temperature probe, supported on a backing foil to a test location, comprising the steps of: (a) connecting long web means to the strain gauge while the gauge still has its backing foil on; (b) connecting an auxiliary carrier to the web means at a distance from said gauge; (c) adhering said gauge to a porous backing with the open grid side thereof facing downwardly through a readily soluble adhesive; (d) peeling off the backing foil; (e) chemically dissolving the adhesive; and (f) applying the prepared gauge to the test location.
Claim 2
Independent Claim
106 words
A method of applying a miniaturized high-temperature free-grid strain gauge of foil construction, or a similar high-temperature probe, supported on a backing foil to a test location, comprising the steps of: (a) connecting long web means to the strain gauge while the gauge still has its backing foil on; (b) connecting an auxiliary carrier to the web means at a distance from said gauge; (c) adhering said gauge to a porous backing with the open grid side thereof facing downwardly through a readily soluble adhesive; (d) peeling off the backing foil; (e) chemically dissolving the adhesive; and (f) applying the prepared gauge to the test location.
Claim 3
Dependent Claim
51 words
A method as claimed in claim 1, comprising applying an insulating layer to said test location; adjusting said strain gauge grid in said test location by applying a drop of a volatile liquid thereon; and fastening said grid to said test location by applying a drop of a ceramic cement adhesive.
Claim 4
Dependent Claim
12 words
A method as claimed in claim 1, said volatile liquid comprising alcohol.
Claim 5
Dependent Claim
15 words
A method as claimed in claim 3, said backing foil comprising a plastic material foil.
Claim 6
Dependent Claim
14 words
A method as claimed in claim 4, said auxiliary carrier being constituted of metal.
Claim 7
Dependent Claim
15 words
A method as claimed in claim 1, said backing foil comprising a plastic material foil.
Claim 8
Dependent Claim
14 words
A method as claimed in claim 1, said auxiliary carrier being constituted of metal.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |