GB557901A - - Google Patents
Info
- Publication number
- GB557901A GB557901A GB557901DA GB557901A GB 557901 A GB557901 A GB 557901A GB 557901D A GB557901D A GB 557901DA GB 557901 A GB557901 A GB 557901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- gnomon
- pointer
- date
- scales
- 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.)
- Active
Links
Landscapes
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
557,901. Sun compasses. FORSTER, C. M. Sept. 18, 1942, No. 13182. Addition to 537,924. [Class 97 (ii)] The construction shown in the parent Specication is modified so that the time scales E comprising the confocal ellipses El and hyperbolae E<SP>2</SP>, and the date scales D<SP>1</SP> ... D4 are engraved on the plate A having the protractor divisions B while the vertical gnomon M is movable in a slot A<SP>1</SP> in the plate A coinciding with the northsouth line. The plate A is fixed to a pivot F carried by the gimbal frame H and the gnomon M with its shadow pointer R is carried by a boss M<SP>1</SP> which passes through the slot A<SP>1</SP> and is screwed into a slide N engaging a groove in the pivot F. The slide N and consequently the gnomon M is moved into correct position for the appropriate date line as indicated by the pointer O and date scales and is clamped by the screw P. The bearing is read against the fixed pointer H<SP>1</SP> by rotating the protractor plate A.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB557901A true GB557901A (en) |
Family
ID=1748799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB557901D Active GB557901A (en) |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB557901A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2557965A (en) * | 1945-03-20 | 1951-06-26 | Hilsenrath Joseph | Azimuth computer |
| GB2191579A (en) * | 1986-06-13 | 1987-12-16 | Paul Dominic Anderson | Sun compasses |
-
0
- GB GB557901D patent/GB557901A/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2557965A (en) * | 1945-03-20 | 1951-06-26 | Hilsenrath Joseph | Azimuth computer |
| GB2191579A (en) * | 1986-06-13 | 1987-12-16 | Paul Dominic Anderson | Sun compasses |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB557901A (en) | ||
| GB537924A (en) | Improvements in and relating to sun compasses | |
| Higgins | The classification of sundials | |
| US3814903A (en) | Automatic sine-cosine trigonometer | |
| WO1984001330A1 (en) | Drafting machine | |
| GB700983A (en) | Improvements in portable sun dials | |
| GB957163A (en) | Improvements relating to apparatus for testing gyroscopes | |
| GB191418817A (en) | An Improved Mechanical-drawing Apparatus. | |
| US3014649A (en) | Firing principles calculator | |
| US938780A (en) | Nautical instrument. | |
| GB827140A (en) | Improvements in or relating to pick-up bearing pressure indicators | |
| US15183A (en) | Plotting instrument | |
| SU1580428A1 (en) | Table eternal calender | |
| US1124421A (en) | Chart-rule. | |
| GB189922548A (en) | Improvements in Chart Drawing Instruments. | |
| Ballard | Cartographic Drawing Instruments—The Eighteenth and Nineteenth Centuries | |
| GB738223A (en) | Drawing instrument | |
| SU353852A1 (en) | PERFORMANCES | |
| CN2867496Y (en) | Educational solar terms measuring apparatus | |
| GB191128132A (en) | An Improved Tachymetric Calculator. | |
| GB1255824A (en) | Measuring devices | |
| GB190905031A (en) | Improved Means and Apparatus for Plotting the Course of a Moving Ship. | |
| US2761213A (en) | Navigation instrument | |
| CN201264452Y (en) | Multifunctional accurate drawing ruler | |
| CN2103457U (en) | Simple measurer for trigonometric functions |