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
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- 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 |
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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 |
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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 |
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