US4100524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical transducer and method of making
Assignee: Gould Inc
•
Filing: 1976-05-06
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Granted: 1978-07-11
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Expires: 1996-05-06
Abstract
Abstract A cermet composition useful in the form of a thin-film as a strain gage consists of 65%-70% by weight chromium, 18%-32% by weight silicon monoxide, and 3%-12% by weight nickel, deposited by vacuum evaporation. After initial deposition, vacuum annealing is accomplished, or, if a more positive TCR and TSS is required, the annealing can be repeated at a higher temperature.
Inventors
- 👤 Thomas Kirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:32
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/12; G; G01; G01B; G01B7/00; G01B7/16; G01B7/18; G01L; G01L1/00; G01L1/20; G01L1/22; G01L1/2287
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
A cermet for use as an electric current conducting element consisting essentially of, by weight, 65%-70% chromium, 18%-32% silicon monoxide, and 3%-12% nickel.
Claim 2
Dependent Claim
23 words
A cermet for use as an electric current conducting element consisting essentially of, by weight, 65%-70% chromium, 18%-32% silicon monoxide, and 3%-12% nickel.
Claim 3
Dependent Claim
44 words
A strain gage, comprising: an electrically conductive substrate; an insulating layer on said substrate; and an electrical current conducting element on said insulating layer consisting essentially of 65%-70% by weight of chromium, 18%-32% by weight of silicon monoxide and 3%-12% by weight of nickel.
Claim 4
Dependent Claim
44 words
A strain gage, comprising: an electrically conductive substrate; an insulating layer on said substrate; and an electrical current conducting element on said insulating layer consisting essentially of 65%-70% by weight of chromium, 18%-32% by weight of silicon monoxide and 3%-12% by weight of nickel.
Claim 5
Dependent Claim
16 words
A strain gage as in claim 2, in which the substrate consists essentially of stainless steel.
Claim 6
Dependent Claim
17 words
A strain gage as in claim 2, in which the insulating layer consists essentially of silicon monoxide.
Claim 7
Dependent Claim
26 words
A strain gage as in claim 2, in which the substrate is constructed of a stainless steel and the insulating layer consists essentially of silicon monoxide.
Claim 8
Dependent Claim
22 words
A strain gage as in claim 2, in which the insulating layer and the electrical current conducting element are evaporation deposited films.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |