Face the vertical circle casing toward the left side of the box (oriented from the front handle view). The micrometer eyepiece should point upward or toward the designated cutout pocket. Step 3: Lower onto the Base
Reassembly is the exact reverse of disassembly, guided by your sequence photos and witness marks.
Plunge the telescope so it rests perfectly vertical or perfectly horizontal, depending on your specific case profile. Most Hilger & Watts hard cases require the telescope to be oriented horizontally with the objective lens pointing downward. Step 2: Orient the Circles
Precision instruments require specific tools to prevent damage to soft brass components and specialized optical glass. Mechanical Tools
Once repacked, the instrument must be recalibrated to ensure accuracy. Critical tests include: hilger watts theodolite manual repack
Whether you are restoring a microptic theodolite No. 1, recalibrating a Watts ST‑200 for workshop use, or simply fascinated by the precision of optical instruments, having access to a well‑repacked manual transforms a vintage theodolite from a museum piece into a working tool. The circle‑reading instructions, collimation adjustments, and case‑care details printed decades ago remain as relevant today as they were when a surveyor first opened the case on a hillside in Kent or a mine shaft in Wales. The manual repack is the key that unlocks that continuing utility—and a tribute to the engineering excellence of Hilger & Watts.
For the main vertical and horizontal axes, the process involves removing the telescope from its bearings . Clean the spindle and the sleeve thoroughly.
Back out the three leveling foot-screws entirely if they exhibit heavy resistance.
Reattach the upper plate, ensuring it's securely fastened with the 5 mm Allen wrench. Make sure the screws are tightened firmly but not over-tightened. Face the vertical circle casing toward the left
: Small precision screwdrivers and possibly a capstan head screw adjuster. Cleaning Supplies : Soft lint-free cloths and brushes. Step-by-Step Repacking Procedure 1. Disassembly of Tangent Screws
Before you start the repacking process, ensure you have the following tools and materials:
In essence, the , ensuring that a Hilger & Watts theodolite owner can still access the manufacturer’s original guidance on setting up, levelling, angle measurement, and adjustment.
The (clear, hazy, or separated prisms)
: Store the cased instrument in a well-ventilated, bright room. If you live in a humid climate, include a fresh desiccant pack (silica gel) inside the case to keep humidity below 75%. Tripod Maintenance
Before turning a single screw, commit these rules to memory to avoid permanently ruining a rare instrument.
The Hilger Watts theodolite is a precision instrument used for measuring angles and distances in surveying and engineering applications. While the original manual provided with the instrument is a valuable resource, there may be instances where a repackaged or reprinted version is needed. In this article, we'll explore the process of creating a Hilger Watts theodolite manual repack, its importance, and provide a comprehensive guide for those seeking to recreate or obtain a manual for their instrument.
: Remove the slow-motion tangent screws and their internal springs. Note the "feel" of the tension before removal. 3. Cleaning and Degreasing Mechanical Parts Plunge the telescope so it rests perfectly vertical
The Hilger Watts theodolite manual is a comprehensive guide that provides detailed instructions on instrument operation, calibration, and maintenance. The manual covers topics such as:
For surveyors who preferred simplicity and lower cost, Hilger & Watts offered vernier theodolites. Their brochure (shelfmark Hil.479) explains reading to 20 seconds of arc, details tripod options, circle figuring, and provides full specifications for telescope, circles, vernier scales, spirit levels, and levelling base.