GB566114A - Improvements in the lighting of the scales of indicating instruments - Google Patents
Improvements in the lighting of the scales of indicating instrumentsInfo
- Publication number
- GB566114A GB566114A GB480943A GB480943A GB566114A GB 566114 A GB566114 A GB 566114A GB 480943 A GB480943 A GB 480943A GB 480943 A GB480943 A GB 480943A GB 566114 A GB566114 A GB 566114A
- Authority
- GB
- United Kingdom
- Prior art keywords
- scales
- prism
- casing
- light
- instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/28—Structurally-combined illuminating devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D13/00—Component parts of indicators for measuring arrangements not specially adapted for a specific variable
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Measuring And Other Instruments (AREA)
Abstract
566,114. Indicating apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and MOON, J. H. March 24, 1943, No. 4809. [Class 106 (iv)] The scales of an indicating instrument are illuminated by light from lamps L situated within the instrument casing and below the scales O, I, the light being reflected from surfaces R to a prism P and refracted by the prism on to the scales. The scales are opaque and, in the instrument shown, the outer scale O is rotatable. The prism P is carried on the outer scale O and the base of the prism is matted and painted black. Alternatively, a black adhesive may be used to secure the prism to the scale. The upper parts M of the casing are painted black and the space between the apex of the prism and the casing top is small, direct light from the lamps thus being prevented from passing to the eyes of an observer. The invention may be applied to straight scales, such as the scales of radio receivers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB480943A GB566114A (en) | 1943-03-24 | 1943-03-24 | Improvements in the lighting of the scales of indicating instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB480943A GB566114A (en) | 1943-03-24 | 1943-03-24 | Improvements in the lighting of the scales of indicating instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB566114A true GB566114A (en) | 1944-12-14 |
Family
ID=9784225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB480943A Expired GB566114A (en) | 1943-03-24 | 1943-03-24 | Improvements in the lighting of the scales of indicating instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB566114A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115379A (en) * | 1985-08-27 | 1992-05-19 | Kiyoshi Nagai | Composite filter and illuminating device |
-
1943
- 1943-03-24 GB GB480943A patent/GB566114A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5115379A (en) * | 1985-08-27 | 1992-05-19 | Kiyoshi Nagai | Composite filter and illuminating device |
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