The Hilger Watts theodolite represents a pinnacle of mid-20th-century optical engineering. But a theodolite without its manual is like a loom without a pattern—beautiful, but functionally mute. Whether you are a professional surveyor, a civil engineering historian, or a collector of fine instruments, your first investment after the theodolite itself should be securing the correct .
Unlike older vernier theodolites that required reading exposed metal scales with a magnifying glass, Hilger & Watts Microptic models feature an auxiliary eyepiece right next to the main telescope eyepiece. This allows the operator to read both the horizontal and vertical glass circles internally through an intricate system of prisms and mirrors. 3. Controls and Clamps
Vintage optical instruments are susceptible to dust, moisture, and mechanical stiffness caused by hardened grease. Routine Cleaning
Rotate the instrument 90 degrees so that the bubble vial points toward the third footscrew. Turn only the third footscrew to center the bubble. hilger watts theodolite manual
Whether you are a collector who just acquired a vintage ST110 or a surveyor looking to maintain a piece of optical history, understanding the nuances of the is essential for accurate operation. 1. The Legacy of Hilger & Watts
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Sight your target object and use the main focusing knob until the image is sharp. The Hilger Watts theodolite represents a pinnacle of
Using the wrong oil destroys vintage brass gears.
The manual instructs users on the "three-screw" levelling system. Achieving a perfectly level plate bubble is the first step to ensuring the vertical axis is truly vertical. The Optical Plummet
Estimate the remaining single minutes and seconds by looking at where the index line rests between the 20-second graduation marks. Reading the Microptic No. 2 Micrometer please let me know:
A sensitive spirit level tube mounted on the rotating upper instrument plate (alidade) used for precise leveling.
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