US3596178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring electrical quantities with adjustable maximum and minimum threshold limitation
Assignee: Individual
•
Filing: 1969-04-02
•
Granted: 1971-07-27
•
Expires: 1989-04-02
Abstract
Abstract A device for measuring electrical quantities with adjustable maximum and minimum threshold limitation comprises an electrical meter movement with a flag secured to a moving part which flag intercepts the luminous flux from a light source aligned with the axis of the moving part, a light conductor made of material whose refraction factor differs from that of air, and light sensitive elements sensing the luminous flux passing through the light conductor, the sensitive elements being adapted to be displaced when setting a prescribed threshold limitation. The light conductor is made in the form of a stepped biconcave lens with an optical axis coinciding with the axis of the moving part, the steps of the lens being formed by concentric surfaces limiting the lateral faces of the lens and remote from the optical axis by different radii. The step of smaller radius has a recess accommodating a light source, while the step of larger radius is provided with a concave surface for complete internal reflection of the luminous flux of the light source.
Inventors
- 👤 Anatoly Grigorievich Sklyaruk
- 👤 Viktor Yakovlevich Shaevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:36
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
248 words
A device for measuring electrical quantities with adjustable maximum and minimum quantity detection comprising in combination; an electrical meter movement with movable means positioned about an axis by an angle depending on the electrical quantity being measured; a light source in alignment with the axis of said movable means; a light conductor of transparent material having a refraction factor differing from the refraction factor of air, said light conductor being constituted as a two-step, biconcave lens with an optical axis coinciding with the axis of said movable means, the steps of said lens being formed by concentric lateral surfaces limiting the lateral faces of the lens and spaced from the optical axis by different radii, the concave surface of the step which is limited by the lateral surface with the smaller radius forming a recess accommodating said light source, the concave surface of the step with the larger radius providing for complete internal reflection of the light of said light source except at the lateral face thereof; first and second light-sensitive means positioned adjacent the lateral face of the step having the larger radius, said light-sensitive means being separately positionable about the axis of said movable means to define respectively the maximum and minimum quantities; and a flag mounted on said movable means for intercepting the light passing from the lateral face of the step having the larger radius to a respective one of said light sensitive mean when one of said maximum and minimum quantities is measured.
Claim 2
Independent Claim
248 words
A device for measuring electrical quantities with adjustable maximum and minimum quantity detection comprising in combination; an electrical meter movement with movable means positioned about an axis by an angle depending on the electrical quantity being measured; a light source in alignment with the axis of said movable means; a light conductor of transparent material having a refraction factor differing from the refraction factor of air, said light conductor being constituted as a two-step, biconcave lens with an optical axis coinciding with the axis of said movable means, the steps of said lens being formed by concentric lateral surfaces limiting the lateral faces of the lens and spaced from the optical axis by different radii, the concave surface of the step which is limited by the lateral surface with the smaller radius forming a recess accommodating said light source, the concave surface of the step with the larger radius providing for complete internal reflection of the light of said light source except at the lateral face thereof; first and second light-sensitive means positioned adjacent the lateral face of the step having the larger radius, said light-sensitive means being separately positionable about the axis of said movable means to define respectively the maximum and minimum quantities; and a flag mounted on said movable means for intercepting the light passing from the lateral face of the step having the larger radius to a respective one of said light sensitive mean when one of said maximum and minimum quantities is measured.
Claim 3
Dependent Claim
32 words
A device as claimed in claim 1 comprising light reflecting material on said light conductor in the regions outside said recess and the lateral face of the step having the larger radius.
Claim 4
Dependent Claim
27 words
A device as claimed in claim 1, in which the concave surface of the step having the larger Radius and said recess are formed by spherical surfaces.
Claim 5
Dependent Claim
26 words
A device as claimed in claim 1, in which the concave surface in the step of larger radius and said recess are formed by conical surfaces.
Claim 6
Dependent Claim
31 words
A device as claimed in claim 1, in which the concave surface in the step of larger radius and said recess are formed by a combination of conical and spherical surfaces.
Claim 7
Dependent Claim
33 words
A device as claimed in claim 1, in which the concave surface in the step of larger radius is formed by a corrugated surface transverse to the optical axis of the light conductor.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |