137 results about "Kymograph" patented technology

A kymograph (from Greek κῦμα, swell or wave + γραφή, writing; also called a kymographion) is a device that draws a graphical representation of spatial position over time in which a spatial axis represents time. It basically consists of a revolving drum wrapped with a sheet of paper on which a stylus moves back and forth recording perceived changes of phenomena such as motion or pressure.