I can write a detailed troubleshooting section outlining how to fix or cloudy internal glass scales .
What is the or stamping on your instrument (e.g., No. 1, No. 2, or a military broad-arrow marking)?
Read the whole degrees and tens of minutes from the main scale window.
A rudimentary external sight mounted on top of the telescope for rapid initial targeting. 2. The Reading System (Microptic Eyepiece)
Never force any knob or screw. If a tangent screw stops turning, it has reached the end of its thread; back it off and readjust coarse alignment. Never use heavy household lubricants or WD-40 on the internal gears, as they will attract dust and gum up the fine mechanics.
Their theodolites (especially the TM series ) were considered the "Rolls Royce" of survey instruments, competing directly with Wild Heerbrugg and Kern. They feature read via an optical micrometer, rather than the older vernier scale.
If you own a Hilger Watts instrument without its paper, do not despair. Use the resources above—forums, archives, and museums—to locate that PDF. And once you find it, pay it forward: scan it in high resolution (600 DPI) and upload it to Archive.org under the title .
Always lock the instrument's clamps lightly when placing it in its fitted transit case to prevent it from rattling against the secure wooden blocks or rubber bumpers.
Hilger & Watts produced several theodolite models, each with unique features. Understanding the model is the first step to finding the correct manual, which is often listed by model number (e.g., ST-156) or catalogue number (e.g., CS 16/4).
Reading a Hilger & Watts circle depends entirely on which model you are using.
user wants a long article for the keyword "hilger watts theodolite manual". This suggests the article should be a comprehensive guide or resource page, likely targeting users seeking manuals, operation guides, or historical context for Hilger Watts theodolites. The article should be informative and useful.
To measure a : Sight the first target (e.g., Point A), record the horizontal angle. Swing the telescope to the second target (Point B) and record the new angle. The difference is your horizontal angle.
Because Hilger & Watts ceased operations in the 1980s (later absorbed by Rank Precision Industries), original manuals are not in print. However, you can locate PDF copies via:
A control knob used to align the division lines of the optical circles to get precise, sub-minute angular readings. 3. Step-by-Step Setup and Leveling Procedure