manograph

Meaning

An optical device for making pressure volume diagrams for high-speed engines, involving a light-tight box or camera having at one end a small convex mirror reflecting a beam of light onto the ground glass or photographic plate at the other end. The mirror is pivoted so that it can be moved so as to copy the motion of the engine piston on a smaller scale.

Synonyms

manometer

pressure recorder

pressure indicator

weather gauge

pressure meter

rain glass

pressure-measuring device

piezo-gauge

dial barometer

gas-pressure meter

gas pressure indicator

barometer

pressure register

pressure gage

Translations

manographe

Etymology

From Ancient Greek μανός (manós, “thin, rare”) + -graph.