US4641434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inclination measuring device
Assignee: Individual
•
Filing: 1985-10-03
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Granted: 1987-02-10
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Expires: 2005-10-03
Abstract
Abstract The instrument includes a cylindrical chamber with two parallel end walls. At least one of the end walls is plated with two semicircular condenser plates forming a gap between them. The chamber is filled half and half with two non-intermixing liquids of different specific gravity. In one embodiment the other end wall is plated with a third condenser plate and the two liquids are non-conductive and have different dielectric properties. In another embodiment, the two condenser plates on the one end wall are plated with a dielectric layer and at least one of the two liquids is an electrolyte. The instrument has a high measuring range and high accuracy and resolution.
Inventors
- 👤 Max Engler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/20; G01C9/02; G01C9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
An inclination measuring instrument comprising a cylindrical chamber with two planar, parallel, radial end walls, a first of the end walls being plated with at least two condenser plates, the two plates defining a gap between them and being plated with a solid dielectric layer, and the chamber containing equal amounts, by volume, of two non-intermixing, non-intersoluble liquids of different specific gravity and different electrolytic properties.
Claim 2
Dependent Claim
66 words
An inclination measuring instrument comprising a cylindrical chamber with two planar, parallel, radial end walls, a first of the end walls being plated with at least two condenser plates, the two plates defining a gap between them and being plated with a solid dielectric layer, and the chamber containing equal amounts, by volume, of two non-intermixing, non-intersoluble liquids of different specific gravity and different electrolytic properties.
Claim 3
Dependent Claim
43 words
The instrument according to claim 1 wherein the gap between said plates is a straight line forming an angle of about 30 to about 60 degrees with a reference surface of the instrument, the two end walls being perpendicular to the reference surface.
Claim 4
Dependent Claim
22 words
The instrument according to claim 1 wherein the condenser plates each consist of a metal layer plated onto the first end wall.
Claim 5
Dependent Claim
15 words
The instrument according to claim 1 including two condenser plates which are semicircular in configuration.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |