US3761704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial illuminating device
Assignee: MATUSUSHITA ELECTRIC INDUSTRIAL CO LTD JA
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Filing: 1972-01-06
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Granted: 1973-09-25
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Expires: 1992-01-06
Abstract
Abstract A dial illuminating device comprising a light converting member consisting of two transparent light converting elements in the form of trapezoids. The trapezoids, which are in end-to-end relationship, each have a first oblique surface and a second surface which is perpendicular to the ends of the trapezoid. A dial plate is positioned adjacent the second surfaces of the light converting elements. Light sources are mounted adjacent the opposite ends of the light converting member and filter means are interposed between the light sources and the respective ends, each of the filter sources comprising a plurality of transparent color sections. Filtered light from the light sources is irregularly reflected by the oblique surfaces of the light converting elements and is incident on the dial plate.
Inventors
- 👤 K Takeichi
- 👤 S Hama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:37
CPC Classifications
G; G01; G01D; G01D11/00; G01D11/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A dial illuminating device, comprising a light converting member of a transparent material having a trapezoidal configuration, one oblique surface of said converting member extending along one side of said converting member and being adapted to irregularly reflect light-rays projected through one end surface of said light converting member; a dial plate positioned adjacent the side of said light converting member opposing the oblique surface of said member; a light source mounted adjacent said one end surface of said member to project light-rays on said one oblique surface of said member; filter means interposed between said one end surface and said light source, said filter means comprising a plurality of transparent color sections which are aligned side-by-side in a predetermined direction; an operating shaft; and a reciprocating connecting lever coupled in interlocking relationship to said filter means and said operating shaft, the color of the light rays projected on said one oblique surface of said member being changed by operation of said operating shaft.
Claim 2
Dependent Claim
164 words
A dial illuminating device, comprising a light converting member of a transparent material having a trapezoidal configuration, one oblique surface of said converting member extending along one side of said converting member and being adapted to irregularly reflect light-rays projected through one end surface of said light converting member; a dial plate positioned adjacent the side of said light converting member opposing the oblique surface of said member; a light source mounted adjacent said one end surface of said member to project light-rays on said one oblique surface of said member; filter means interposed between said one end surface and said light source, said filter means comprising a plurality of transparent color sections which are aligned side-by-side in a predetermined direction; an operating shaft; and a reciprocating connecting lever coupled in interlocking relationship to said filter means and said operating shaft, the color of the light rays projected on said one oblique surface of said member being changed by operation of said operating shaft.
Claim 3
Dependent Claim
50 words
A dial illuminating device as defined in claim 1 which further comprises an operating disk having a through-hole formed therein, said through-hole being constituted by the combination of smaller and larger arcuate portions; and a connecting pin attached to one end of said connected lever and projected into said through-hole.
Claim 4
Dependent Claim
147 words
A dial illuminating device comprising a light converting member constituted by two light converting elements of a trans-parent material configured in a trapezoidal configuration and combined in end-to-end relationship with each other, each of said two light converting elements having an oblique first surface extending along a first side of said converting member and a second surface perpendicular to the two opposite ends of said converting member extending along a second side of said converting member, said first oblique surfaces irregularly reflecting light rays through said second surfaces of each of said light converting elements; a dial plate positioned adjacent said second side of said light converting member; light sources mounted respectively adjacent said opposite ends of said light converting member; and two filter means each interposed between said light sources and the respective one of said opposite ends and comprising a plurality of transparent color sections.
Claim 5
Dependent Claim
147 words
A dial illuminating device comprising a light converting member constituted by two light converting elements of a trans-parent material configured in a trapezoidal configuration and combined in end-to-end relationship with each other, each of said two light converting elements having an oblique first surface extending along a first side of said converting member and a second surface perpendicular to the two opposite ends of said converting member extending along a second side of said converting member, said first oblique surfaces irregularly reflecting light rays through said second surfaces of each of said light converting elements; a dial plate positioned adjacent said second side of said light converting member; light sources mounted respectively adjacent said opposite ends of said light converting member; and two filter means each interposed between said light sources and the respective one of said opposite ends and comprising a plurality of transparent color sections.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |