Hilger & Watts optical theodolites are masterpieces of mid-20th-century precision engineering. Renowned for their robust construction and exceptionally clear optics, these instruments remain highly valued by surveyors, collectors, and instrument restorers worldwide.
Always store the instrument in its original carrying case, with the clamps tightened gently. Handling: Never force a screw or clamp. 6. Sourcing a Hilger & Watts Manual
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Turn the instrument 90 degrees so the spirit level faces the third footscrew. Adjust only the third footscrew to center the bubble. hilger watts theodolite manual
Rotate back to the original position and verify. Repeat until the bubble remains perfectly centered through a full 360-degree rotation. Step 4: Centering with the Optical Plummet
To eliminate inherent instrumental alignment errors, always employ the "Two-Face" method of observation. Face Left (Direct) vs. Face Right (Reverse)
Before the advent of digital total stations, the Hilger & Watts "Microptic" series revolutionized surveying. Instead of reading external metal vernier scales with a magnifying glass, surveyors could read finely graduated glass circles directly through a secondary internal optical eyepiece running parallel to the main telescope. 2. Anatomy of a Hilger & Watts Theodolite Hilger & Watts optical theodolites are masterpieces of
For , the process is similar, using the vertical circle.
Because Hilger & Watts ceased production decades ago, finding physical manuals requires looking into historical and archival spaces:
Place the theodolite on the head and secure it with the centering screw. Handling: Never force a screw or clamp
Vintage optical instruments require careful upkeep to preserve their functionality and resale value.
Refocus the crosshairs against a plain background before aiming at the target. Dried-out whale oil or grease