US3775680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the detection of wear
Assignee: Computas AS
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Filing: 1972-02-18
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Granted: 1973-11-27
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Expires: 1992-02-18
Abstract
Abstract Device for the detection of wear on the surface of a machine element, characterized thereby that in the material of the machine element there is provided a detector element in the form of an electrical resistor the current carrying cross-section of which is adapted to be reduced along with the wearing-down of the surface of the machine element.
Inventors
- 👤 O Egeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:08
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/12; F16C17/24; F16C17/246; G; G01; G01N; G01N3/00; G01N3/56
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
Device for the continuous measurement of wear on the surface (1) of a machine element (2), comprising a detector element (3) arranged in the material of the machine element (2), said detector element being in the form of an electrical thin film resistor (4) having two opposite sides being non-parallel to said machine element surface, said detector element further comprising thin film leads (5,6) providing contact along said two opposite sides of the thin film resistor for connecting the resistor to associated electrical measuring circuits, and one edge of said resistor other than said two opposite sides thereof being adapted to be exposed at said machine element surface, whereby the current carrying cross-section of said thin film resistor is adapted to be reduced along with the wearing down of said machine element surface (1).
Claim 2
Dependent Claim
134 words
Device for the continuous measurement of wear on the surface (1) of a machine element (2), comprising a detector element (3) arranged in the material of the machine element (2), said detector element being in the form of an electrical thin film resistor (4) having two opposite sides being non-parallel to said machine element surface, said detector element further comprising thin film leads (5,6) providing contact along said two opposite sides of the thin film resistor for connecting the resistor to associated electrical measuring circuits, and one edge of said resistor other than said two opposite sides thereof being adapted to be exposed at said machine element surface, whereby the current carrying cross-section of said thin film resistor is adapted to be reduced along with the wearing down of said machine element surface (1).
Claim 3
Dependent Claim
64 words
Device according to claim 1, characterized thereby that the electrical resistor (24) has essentially a plate shape and has at least one boundary edge (27) which from the wearing edge of the detector element (23) runs inwardly thereon at an inclination, possibly with a continuously varying direction, so that there is obtained a preferably continuously increasing effective length of the resistor with increased wear.
Claim 4
Dependent Claim
73 words
Device according to claim 1, characterized thereby that the detector eLement (3) is provided on a supporting plate (9) with electrical insulation on both sides of the electrical resistor (4), that the whole assembly is mounted in a preferably conical hollow plug (10) by means of wedges, and that the plug and the wedges are made of a material with approximately the same wearing properties as the material in the machine element (2).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |