Watts Theodolite Manual — Hilger

The instruction manual for a theodolite is more than just a technical guide; it is a gateway to the pinnacle of British mid-20th-century precision engineering . For surveyors, engineers, and historians, these manuals represent the standard operating procedures for instruments that mapped nations and guided the infrastructure of the post-war world. The Legacy of Hilger & Watts

Hilger & Watts theodolites represent the pinnacle of mid-20th-century British optical and mechanical engineering. Highly prized by surveyors, engineers, and instrument collectors alike, these precise instruments require specific knowledge to operate, calibrate, and maintain.

Turn both footscrews simultaneously in opposite directions (either both inward or both outward) until the bubble rests perfectly in the center of the lines. hilger watts theodolite manual

When looking through the reading eyepiece of a No. 1 model, you will see two illuminated apertures: typically the upper window displays the Vertical Circle () and the lower window displays the Horizontal Circle ( H ). Look for the main degree numbers printed on the scale.

0;40c;: Position the tripod over the mark and use the foot screws and altitude bubble to level the theodolite. The instruction manual for a theodolite is more

Websites such as the Virtual Archive of Wild Heerbrugg, the Surveying Museum, and various university civil engineering archives often host scanned PDF copies of Watts Microptic brochures and operating handbooks.

This is the most unique part of Hilger & Watts instruments. The manual describes a : 1 model, you will see two illuminated apertures:

Never wipe glass lenses with dry cloths or fingers. Use a soft camel-hair brush to remove dust. If necessary, use pure isopropyl alcohol and high-quality optical tissue applied in a gentle circular motion.

Rotate the instrument back to the original position to verify, and check all 360 degrees of rotation. If the bubble shifts out of the center lines at any point, the plate level requires calibration (see Section 5). 3. Reading the Optical Scales and Micrometer