Necessary for removing retaining rings on the objective lens and eyepiece assemblies without scratching the glass.
Old British instruments often suffer from "frozen" joints due to oxidized whale-oil-based lubricants or old synthetic greases that have turned into varnish.
: If you are storing the tripod as well, collapse the legs and ensure the centering screw is secured so it doesn't swing and damage the tripod head. Finding Original Manuals How To Use Theodolites | Johnson Level & Tool Mfg Company
Apply a thin coating of medium-viscosity grease or heavy instrument oil to the threads.
Accessing the optical reading circles requires removing the protective side plates. hilger watts theodolite manual repack
To help tailor any specific troubleshooting advice for your project, let me know:
: Rectangular with a rounded/domed top, often painted greyish-green with a leather carrying strap.
For detailed diagrams and model-specific instructions, enthusiasts often look for vintage publications like the Watts 1950 Instruction Booklet or the 1963 Operations and Maintenance Manual . Microptic transit theodolite, 1954
: The three screws at the base used for precise leveling. Essential Tools and Materials To perform a manual repack, you will need: Necessary for removing retaining rings on the objective
Insert the adjusting pins, small screwdrivers, and camel-hair brushes into the canvas tool roll or slotted wooden holder.
High-viscosity damping grease (e.g., Nyogel or Micro-Lube) for the main vertical and horizontal axes.
: Most Hilger & Watts cases use a specific internal geometry or custom-made foam inserts to support heavy components and relieve pressure on sensitive areas.
The vertical axis controls the smooth horizontal rotation (azimuth) of the theodolite. Finding Original Manuals How To Use Theodolites |
Most Hilger & Watts instruments originally came in a "bell-style" steel or aluminum alloy case. This design is distinctive because the instrument stands on its base while the outer shell drops over the top and clamps to the bottom plate. Inside, there are specific leather-padded or rubber-cushioned supports tailored to the dimensions of the telescope and the standards. Understanding these contact points is the first step to a successful repack. Pre-Packing Inspection and Cleaning
A well-adjusted theodolite is critical for accurate data. These adjustments should be performed regularly or if you suspect an error.
Clean the threads with a stiff nylon brush until the metal is bright. 3. The Vertical Circle and Standards Cover