![]() Attached to the central point are two bars so constructed that they radiate from a common center and preferably cross at the center like a pair of scissors and having their inner edges capable of being placed together to form one diametrical bearing line right across the center of the instrument. It consists of a fiat base card or plate having a disk with a central point around which is drawn a number of circles to represent miles of distance and portions of miles through the center of these circles a line is drawn called the line of ships course with Ships Head marked at one end outside the circles of distance is an annular ring marked with degrees or points of the compass which may be adjustable to the ships course. G01B3/56- Gauges for measuring angles or tapers, e.g.G01B3/00- Measuring instruments characterised by the use of mechanical techniques.G01B- MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS.Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Publication date Application granted granted Critical Publication of US499495A publication Critical patent/US499495A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links US499495A - Edwin baker - Google Patents US499495A - Edwin baker - Google Patents Edwin baker Download PDF Info Publication number US499495A US499495A US499495DA US499495A US 499495 A US499495 A US 499495A US 499495D A US499495D A US 499495DA US 499495 A US499495 A US 499495A Authority US United States Prior art keywords distance circles scale center bearing Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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