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Patent:GB537924


Patent:GB 537924
Title:Sundials
Date:14.07.1941
Place:Etherston, Northumberland
Country:Great Britain
Person:Forster, Charles (P)
Company:
Internal Links:Analogrechner
Keywords:sonnenuhr
Link to the patent office:
(without guarantee)		 GB537924


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Aus der Patentschrift GB537924

" Claim is: 1. A sun compass comprising means for indicating the apparent time for a given latitude by the intersection or apparent intersection of a suitable ellipse and a suitable confocal hyperbola and means for correlating such indications with a suitable date indicator. ... " (  GB537924 )