Description of the Deflection Board Model of 1906 With De Carre Drift Chart Fo
Description of the Deflection Board Model of 1906 With De Carre Drift Chart Fo
United States Army Ordnance Dept
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In other words, the main traversing screw is operated only to set the uncorrected azimuth pointer marked "Set" at the desired angle on the azimuth scale. The corrections for drift or deflection are not affected by operating the main traversing screw. 7. Directly below the azimuth subscale is the carriage, which affords a seat for the slide. The carriage is moved left or right by turning the main traversing wheel. The uncorrected azimuth poin- ter, which is enameled red and marked "Set" in white... letters, is attached to the carriage and is provided to enable the instrument to be set to the uncorrected azimuth on the subscale. 8. The slide, upon which is mounted the drift chart mechanism, is moved left or right, independently of the carriage, by rotating the slide knob. Located at each end of this slide are bearings provided for the front and rear rollers. The notches cut in the front boss of the right bearing, form seats for the teeth of the front bearing clutch. The corrected azimuth pointer, which is enameled white and marked "Read" in red letters, is secured to the slide.
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