ANGLE-MEASURING INSTRUMENT COMPRISING A MICROSCOPE FOR DIAL READING

摘要

1281191 Scale reading CARL ZEISS JENA VEB 12 Nov 1969 55416/69 Heading G2J An angle-measuring instrument comprises a microscope, for dial reading having images g 1 , k 1 Fig. 1 of two diametrically opposite marks on a dial which move in opposite senses to coincidence and wherein both the sense of displacement of the images of the marks and the reading of a sequence of digits are in a substantially horizontal plane in the field of view of an observer. Fig. 1 shows the field of view of the microscope with a substantially digital display having windows C 1 , d 1 , e 1 , showing the units, tenths, hundredths, thousandths and ten thousandths and the images g 1 , k 1 of diametrically opposite dial marks in window b 1 .