GB203478A - Luminous star chart for use in the dark - Google Patents
Luminous star chart for use in the darkInfo
- Publication number
- GB203478A GB203478A GB2080522A GB2080522A GB203478A GB 203478 A GB203478 A GB 203478A GB 2080522 A GB2080522 A GB 2080522A GB 2080522 A GB2080522 A GB 2080522A GB 203478 A GB203478 A GB 203478A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- slot
- stars
- dark
- chart
- 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
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B27/00—Planetaria; Globes
- G09B27/04—Star maps
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Electrically Operated Instructional Devices (AREA)
Abstract
203,478. Meyer, A. W. July 29, 1922. Charts.-A star chart for educational purposes and for use in the dark comprises a fixed dial a with a 24-hour scale a<1> in luminous paint and with a slot a<2> at the left-hand side, and a revolving disc b behind the disc a and marked with dates visible through the slot a<2>, the pivot of the disc b extending through to the front of the disc a and carrying a smaller disc c marked in luminous paint with a pointer c<1> and with suitable circumpolar stars. The position of the stars at midnight on any date is found by turning the projecting edge cf the disc b until the date appears at the slot a<2>; the sidereal time is given by the pointer c<1> and scale a<1> when the disc b is turned to a position corresponding to the actual position of the stars in the sky, and the clocktime is given by the difference in hours between these two positions of the disc b. Instructions for finding the Pole star and for converting sidereal time into clock time may be placed on the chart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2080522A GB203478A (en) | 1922-07-29 | 1922-07-29 | Luminous star chart for use in the dark |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2080522A GB203478A (en) | 1922-07-29 | 1922-07-29 | Luminous star chart for use in the dark |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB203478A true GB203478A (en) | 1923-09-13 |
Family
ID=10151953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2080522A Expired GB203478A (en) | 1922-07-29 | 1922-07-29 | Luminous star chart for use in the dark |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB203478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2994971A (en) * | 1959-01-28 | 1961-08-08 | Gilbert Co A C | Instructional sky scanner |
-
1922
- 1922-07-29 GB GB2080522A patent/GB203478A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2994971A (en) * | 1959-01-28 | 1961-08-08 | Gilbert Co A C | Instructional sky scanner |
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