Mechanical Measurement Equipment

A brass instrument for obtaining a diagram of the pressure-volume or pressure-time changes in a steam engine or compression cylinder during the working cycle. The instrument is mounted in a wooden case. a- A rectangular case with brass hinges and internal fittings and hook fastenings. There is an instruction for how to use the engine indicator on the inside of the lid, titled as "AMERICAN THOMPSON IMPROVED INDICATOR". There are pieces of instruments securely attached to the interior of the box. b- A removable wooden drawer. c- A metal pipe with a threaded end and a handle. d- A ranch. e- A screw driver. f- The bottom part of a pencil lead container. g- The top part of a pencil lead container. h-q- Pieces of pencil lead. r- A ruler with the manufacturer's information reads "AM. ST.GAUGE & VALVE MFG.CO.BOSTON". s- A screw. t- A valve spring with stamped "ES" and "20". u- A valve spring with stamped "ES" and "40". v- A valve spring with stamped "ES" and "60". w-z- Pieces of ropes. aa- An exhibition label on a blue board, reads as "American Thompson Improved Indicator, circa 1900. Kingston Civic Collection 2009.015.126" in both English and French.